{"id":2332,"date":"2022-11-14T07:48:38","date_gmt":"2022-11-14T07:48:38","guid":{"rendered":"https:\/\/theexampillar.com\/ncert\/?p=2332"},"modified":"2022-11-29T06:41:25","modified_gmt":"2022-11-29T06:41:25","slug":"ncert-solutions-class-7-science-chapter-14-electric-current-and-its-effects","status":"publish","type":"post","link":"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-science-chapter-14-electric-current-and-its-effects\/","title":{"rendered":"NCERT Solutions Class 7 Science Chapter 14 Electric Current and Its Effects"},"content":{"rendered":"<h2 style=\"text-align: center;\"><span style=\"color: #000000; font-family: georgia, palatino, serif;\">NCERT Solutions Class 7 Science\u00a0<\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"color: #000000; font-family: georgia, palatino, serif;\">The NCERT Solutions in English Language for Class 7 Science <strong>Chapter &#8211; 14 (Electric Current and Its Effects) <\/strong>has been provided here to help the students in solving the questions from this exercise.<\/span><\/p>\n<h2 style=\"text-align: center;\"><span style=\"color: #000000; font-family: georgia, palatino, serif;\">Chapter &#8211; 14 (Electric Current and Its Effects)<\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. Draw in your notebook the symbols to represent the following components of electrical circuits: connecting wires, switch in the \u2018OFF\u2019 position, bulb, cell, switch in the \u2018ON\u2019 position, and battery<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-2409\" src=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q1.jpg\" alt=\"NCERT Class 7 Science Solution\" width=\"537\" height=\"261\" srcset=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q1.jpg 667w, https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q1-300x146.jpg 300w, https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q1-480x233.jpg 480w\" sizes=\"auto, (max-width: 537px) 100vw, 537px\" \/><br \/>\n<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>2. Draw the circuit diagram to represent the circuit shown in Fig.14.21.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-2410\" src=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q2.png\" alt=\"NCERT Class 7 Science Solution\" width=\"293\" height=\"218\" srcset=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q2.png 340w, https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q2-300x223.png 300w\" sizes=\"auto, (max-width: 293px) 100vw, 293px\" \/><br \/>\n<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;<\/strong><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-2411\" src=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Ans-2.png\" alt=\"NCERT Class 7 Science Solution\" width=\"363\" height=\"170\" srcset=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Ans-2.png 750w, https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Ans-2-300x140.png 300w, https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Ans-2-480x225.png 480w\" sizes=\"auto, (max-width: 363px) 100vw, 363px\" \/><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>3. Fig.14.22 shows four cells fixed on a board. Draw lines to indicate how you will connect their terminals with wires to make a battery of four cells.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2413\" src=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-3.png\" alt=\"NCERT Class 7 Science Solution\" width=\"415\" height=\"233\" srcset=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-3.png 415w, https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-3-300x168.png 300w\" sizes=\"auto, (max-width: 415px) 100vw, 415px\" \/><br \/>\n<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2412\" src=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Ans-3.png\" alt=\"NCERT Class 7 Science Solution\" width=\"329\" height=\"152\" srcset=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Ans-3.png 329w, https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Ans-3-300x139.png 300w\" sizes=\"auto, (max-width: 329px) 100vw, 329px\" \/><br \/>\n<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>4. The bulb in the circuit shown in Fig.14.23 does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2415\" src=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-4.png\" alt=\"NCERT Class 7 Science Solution\" width=\"270\" height=\"150\" \/><br \/>\n<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0 <\/strong>In the circuit above bulb is connected on either side.<\/span><br \/>\n<span style=\"color: #000000;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2414\" src=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Ans-4.png\" alt=\"NCERT Class 7 Science Solution\" width=\"346\" height=\"132\" srcset=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Ans-4.png 346w, https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Ans-4-300x114.png 300w\" sizes=\"auto, (max-width: 346px) 100vw, 346px\" \/><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>5. Name any two effects of electric current.<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong>Electric current has the following effect :<\/span><br \/>\n<span style=\"color: #000000;\">(i) Electric current can give rise to heating and lighting.<\/span><br \/>\n<span style=\"color: #000000;\">(ii) Electric current can convert a straight conductor into a temporary magnet.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>6. When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0 <\/strong>When a current is switched on through a wire, the wire starts behaving as a magnet. Hence, when a compass needle is placed near the given current carrying wire, it gets influenced by the magnetic effect of electric current and gets deflected from its North- South position.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>7. Will the compass needle show deflection when the switch in the circuit shown by Fig.14.24 is closed?<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2416\" src=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-7.png\" alt=\"NCERT Class 7 Science Solution\" width=\"401\" height=\"218\" srcset=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-7.png 401w, https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-7-300x163.png 300w\" sizes=\"auto, (max-width: 401px) 100vw, 401px\" \/><br \/>\n<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0 <\/strong>No. The given circuit does not have any current source. In the absence of current, the wire does not behave as a magnet and hence, the compass needle will not show any deflection.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>8. Fill in the blanks:<br \/>\n<\/strong>(a) Longer line in the symbol for a cell represents its ________ terminal.<\/span><br \/>\n<span style=\"color: #000000;\">(b) The combination of two or more cells is called a ________.<\/span><br \/>\n<span style=\"color: #000000;\">(c) When current is switched \u2018on\u2019 in a room heater, it ________.<\/span><br \/>\n<span style=\"color: #000000;\">(d) The safety device based on the heating effect of electric current is called a ________.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;<br \/>\n<\/strong>(a) Longer line in the symbol for a cell represents its\u00a0<span style=\"text-decoration: underline;\"><strong>positive<\/strong><\/span> terminal. <\/span><br \/>\n<span style=\"color: #000000;\">(b) The combination of two or more cells is called a\u00a0<strong><span style=\"text-decoration: underline;\">battery<\/span>.<br \/>\n<\/strong>(c) When current is switched \u2018on\u2019 in a room heater, it\u00a0<strong><span style=\"text-decoration: underline;\">produces heat<\/span> .<br \/>\n<\/strong>(d) The safety device based on the heating effect of electric current is called a\u00a0<span style=\"text-decoration: underline;\"><strong>fuse<\/strong><\/span>\u00a0.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>9. Mark \u2018T\u2019 if the statement is true and \u2018F\u2019 if it is false:<br \/>\n<\/strong>(a) To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell. (T\/F)<\/span><br \/>\n<span style=\"color: #000000;\">(b) When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks. (T\/F)<\/span><br \/>\n<span style=\"color: #000000;\">(c) An electromagnet does not attract a piece of iron. (T\/F)<\/span><br \/>\n<span style=\"color: #000000;\">(d) An electric bell has an electromagnet. (T\/F)<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">(a) To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell. <strong>(False)<\/strong><\/span><br \/>\n<span style=\"color: #000000;\">(b) When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks. <strong>(True)<\/strong><\/span><br \/>\n<span style=\"color: #000000;\">(c) An electromagnet does not attract a piece of iron. <strong>(False)<\/strong><\/span><br \/>\n<span style=\"color: #000000;\">(d) An electric bell has an electromagnet. <strong>(True)<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>10. Do you think an electromagnet can be used for separating plastic bags from a garbage heap? Explain.<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0 <\/strong>No. Electromagnets can only attract magnetic materials. Plastic bag is a non-magnetic material and will not be attracted by an electromagnet. Hence, an electromagnet cannot be used for separating plastic bags from a garbage heap.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>11. An electrician is carrying out some repairs in your house. He wants to replace a fuse by a piece of wire. Would you agree? Give reasons for your response.<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0 <\/strong>No. The electrician cannot be allowed to replace the fuse in the house by a piece of wire. This is because every wire cannot be used as a fuse filament. A fuse filament must have a low melting point such that it could melt and break in response of large amount of current. Most of the wires have high melting points.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>12. Zubeda made an electric circuit using a cell holder shown in Fig. 14.4, a switch and a bulb. When she put the switch in the \u2018ON\u2019 position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2417\" src=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-12.png\" alt=\"NCERT Class 7 Science Solution\" width=\"412\" height=\"232\" srcset=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-12.png 412w, https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-12-300x169.png 300w\" sizes=\"auto, (max-width: 412px) 100vw, 412px\" \/><br \/>\n<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0 <\/strong>One of the reasons may be that the rubber band used in the cell holder may not be tight enough to keep the two cells in contact with each other. If the cells are not in proper contact with each other, then the circuit will not be complete and current will not flow through the circuit. Hence, the bulb will not glow. The other reason may be that the two cells are not connected properly. The negative terminal of one cell must be connected to the positive terminal of the other cell.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>13. In the circuit shown in Fig. 14.25<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2418\" src=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-13.png\" alt=\"NCERT Class 7 Science Solution\" width=\"415\" height=\"223\" srcset=\"https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-13.png 415w, https:\/\/theexampillar.com\/ncert\/wp-content\/uploads\/2022\/11\/NCERT-Solutions-Class-7-Science-Chapter-14-Q-13-300x161.png 300w\" sizes=\"auto, (max-width: 415px) 100vw, 415px\" \/><br \/>\n<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">(i) Would any of the bulb glow when the switch is in the \u2018OFF\u2019 position?<\/span><br \/>\n<span style=\"color: #000000;\">(ii) What will be the order in which the bulbs A, B and C will glow when the switch is moved to the \u2018ON\u2019 position?<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;<br \/>\n<\/strong>(i) No, the bulb will not glow as the circuit is not complete when the switch is off<\/span><br \/>\n<span style=\"color: #000000;\">(ii) If the switch is On, all the bulbs glow simultaneously.<\/span><\/p>\n<table style=\"width: 100%; border-collapse: collapse;\" border=\"1\">\n<tbody>\n<tr>\n<td style=\"width: 100%; background-color: #f2e079; text-align: center;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong>NCERT Class 7<sup>th\u00a0<\/sup>Solution\u00a0<\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\"><a class=\"row-title\" style=\"color: #0000ff;\" href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-english\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"\u201cNCERT Solutions Class 6 English\u201d (Edit)\">NCERT Solutions Class 7 English<\/a><\/span><\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\"><a class=\"row-title\" style=\"color: #0000ff;\" href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-hindi\/\" aria-label=\"\u201cNCERT Solutions Class 6 Maths\u201d (Edit)\">NCERT Solutions Class 7 Hindi<\/a><\/span><\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\"><a class=\"row-title\" style=\"color: #0000ff;\" href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-maths\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"\u201cNCERT Solutions Class 6 Maths\u201d (Edit)\">NCERT Solutions Class 7 Mathematics<\/a>\u00a0<\/span><\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><a href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-sanskrit-ruchira\/\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\">NCERT Solutions Class 7 Sanskrit<\/span><\/strong><\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\"><a class=\"row-title\" style=\"color: #0000ff;\" href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-science\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"\u201cNCERT Solutions Class 6 Social Science\u201d (Edit)\">NCERT Solutions Class 7 Science<\/a><\/span><\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\"><a class=\"row-title\" style=\"color: #0000ff;\" href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-social-science\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"\u201cNCERT Solutions Class 6 Social Science\u201d (Edit)\">NCERT Solutions Class 7 Social Science<\/a><\/span><\/strong><\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions Class 7 Science\u00a0 The NCERT Solutions in English Language for Class 7 Science Chapter &#8211; 14 (Electric Current and Its Effects) has been provided here to help the students in solving the questions from this exercise. Chapter &#8211; 14 (Electric Current and Its Effects) 1. Draw in your notebook the symbols to represent [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[292],"tags":[326,327,295,5],"class_list":["post-2332","post","type-post","status-publish","format-standard","hentry","category-class-7-science","tag-ncert-class-7-science-chapter-14-electric-current-and-its-effects-in-english","tag-ncert-solutions-class-7-science-chapter-14-in-english","tag-ncert-solutions-class-7-science-in-english","tag-ncert-solutions-in-english"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.9 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>NCERT Solutions Class 7 Science Chapter 14 Electric Current and Its Effects | TheExamPillar NCERT<\/title>\n<meta name=\"description\" content=\"NCERT Solutions Class 7 Science\u00a0The NCERT Solutions in 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