If a positively charged glass rod is used to charge a metal bar by induction, the charge on the bar\u2026
A) Will be equal in magnitude to the charge on the glass rod
B) Must be negative
C) Must be positive
D) Will be greater in magnitude than the charge on the glass rod<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n The correct answer is B) Must be negative<\/strong>.<\/p>\n\n\n\n Charging by induction involves rearranging the charges within a conductor (in this case, the metal bar) without direct contact with the source of charge (the positively charged glass rod). Here’s a step-by-step explanation of how this works:<\/p>\n\n\n\n Thus, the metal bar must be negatively charged<\/strong> after being charged by induction with a positively charged glass rod. Therefore, the correct answer is B) Must be negative<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":" If a positively charged glass rod is used to charge a metal bar by induction, the charge on the bar\u2026A) Will be equal in magnitude to the charge on the glass rodB) Must be negativeC) Must be positiveD) Will be greater in magnitude than the charge on the glass rod The Correct Answer and Explanation […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-165145","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/165145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=165145"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/165145\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=165145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=165145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=165145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Explanation:<\/h3>\n\n\n\n
\n
When the positively charged glass rod is brought near the metal bar, it creates an electric field that influences the distribution of charges inside the metal bar. Since the glass rod is positively charged, the electric field it generates exerts a force on the electrons (which are negatively charged) inside the metal bar.<\/li>\n\n\n\n\n
\n
This redistribution of charges creates a polarization<\/strong> of the metal bar: one side (near the rod) becomes negatively charged, and the other side becomes positively charged. However, the total charge on the metal bar remains unchanged because no electrons have been added or removed from the bar. Only their distribution has changed.<\/li>\n\n\n\n
If the metal bar is grounded while the glass rod is still nearby, some of the electrons from the ground will flow into the bar to neutralize the positive charge on the far side of the metal bar. This leaves the metal bar with an overall negative charge<\/strong> after the glass rod is removed.<\/li>\n\n\n\n
After the glass rod is removed and the metal bar is no longer grounded, the metal bar will retain a net negative charge. The bar does not acquire the same type of charge as the glass rod (positive); instead, it has acquired an induced negative charge<\/strong> due to the redistribution of electrons.<\/li>\n<\/ol>\n\n\n\n