{"id":229395,"date":"2025-06-08T06:55:15","date_gmt":"2025-06-08T06:55:15","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=229395"},"modified":"2025-06-08T06:55:17","modified_gmt":"2025-06-08T06:55:17","slug":"if-200-amperes-flow-from-the-positive-terminal-of-a-battery-and-operate-the-starter-motor-how-many-amperes-will-flow-back-to-the-negative-terminal-of-the-battery","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/08\/if-200-amperes-flow-from-the-positive-terminal-of-a-battery-and-operate-the-starter-motor-how-many-amperes-will-flow-back-to-the-negative-terminal-of-the-battery\/","title":{"rendered":"If 200 amperes flow from the positive terminal of a battery and operate the starter motor, how many amperes will flow back to the negative terminal of the battery"},"content":{"rendered":"\n

If 200 amperes flow from the positive terminal of a battery and operate the starter motor, how many amperes will flow back to the negative terminal of the battery? Question 31 options: Cannot be determined 200 amperes About one-half (100 amperes) Zero A braided wire running from the negative battery terminal to the body of a vehicle is known as a ground strap. Question 32 options: facilitating circuit redundant source ground strap None of these In a schematic, a wire is labeled “0.8 BLK\/WHT.” This wire is white with a black stripe. Question 33 options: 0.8 mm square diameter white with a black stripe Both 0.8 mm square diameter and black with a white stripe Neither 0.8 mm diameter nor white with a black stripe A PTC circuit protector prevents excessive current flow in a circuit by changing to a very high resistance. Question 34 options: burning open opening a set of contacts grounding the current changing to a very high resistance What is the total resistance of this circuit? Question 35 options: Not enough information 3 ohms 36 ohms 4 ohms<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Question 31:<\/strong>
Correct Answer: 200 amperes<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
In any electrical circuit, especially a closed-loop DC system like that of an automobile, the current that leaves the battery must return to it<\/strong>. If 200 amperes are flowing from the positive terminal to the starter motor, then 200 amperes must return to the negative terminal<\/strong> to complete the circuit. This principle is based on the law of conservation of charge<\/strong> and Kirchhoff\u2019s Current Law<\/strong>, which states that the current entering any junction must equal the current leaving. The current doesn’t get “used up”; instead, energy is transferred from electrical to mechanical (by the motor), but the current still flows back. Hence, 200 amperes flow back<\/strong> to the battery’s negative terminal.<\/p>\n\n\n\n

\n\n\n\n

Question 32:<\/strong>
Correct Answer: ground strap<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
The braided wire<\/strong> connecting the negative terminal of a battery to the vehicle\u2019s body is known as a ground strap<\/strong>. This ensures the entire metal body of the vehicle acts as a common ground<\/strong> or return path for electrical current. Ground straps are critical for completing circuits<\/strong> and minimizing resistance<\/strong>. They also help protect the vehicle\u2019s electronics by ensuring a stable reference potential and reducing electromagnetic interference.<\/p>\n\n\n\n

\n\n\n\n

Question 33:<\/strong>
Correct Answer: 0.8 mm square diameter and black with a white stripe<\/strong><\/p>\n\n\n\n

Explanation:<\/strong>
In wiring schematics, “0.8 BLK\/WHT” means:<\/p>\n\n\n\n

    \n
  • 0.8 mm\u00b2<\/strong> refers to the cross-sectional area<\/strong> of the wire, not diameter.<\/li>\n\n\n\n
  • BLK\/WHT<\/strong> means the wire is black with a white stripe<\/strong>.
    So, the wire has a cross-sectional area of 0.8 mm\u00b2<\/strong> and is black with a white stripe<\/strong>, making this the correct interpretation.<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    Question 34:<\/strong>
    Correct Answer: changing to a very high resistance<\/strong><\/p>\n\n\n\n

    Explanation:<\/strong>
    A PTC (Positive Temperature Coefficient) circuit protector<\/strong> works by increasing its resistance<\/strong> as temperature (from current) rises. It doesn\u2019t “burn out” like a fuse. When the current exceeds safe levels, the PTC material heats up, causing resistance to increase rapidly, reducing current flow<\/strong>. Once the circuit cools, the PTC resets and allows normal operation again. It’s a self-resetting circuit protector<\/strong>.<\/p>\n\n\n\n

    \n\n\n\n

    Question 35:<\/strong>
    Correct Answer: Not enough information<\/strong><\/p>\n\n\n\n

    Explanation:<\/strong>
    This question asks for total resistance<\/strong> in a circuit, but no diagram, values, or configuration<\/strong> (series or parallel) are provided. Resistance in a circuit depends on how resistors are arranged. Without knowing the number of resistors, their values, or the layout, it’s impossible to calculate<\/strong> the total resistance. Therefore, the only correct answer is “Not enough information”<\/strong>.<\/p>\n\n\n\n

    \n\n\n\n

    Summary:<\/strong><\/p>\n\n\n\n

      \n
    • Q31: 200 amperes<\/li>\n\n\n\n
    • Q32: ground strap<\/li>\n\n\n\n
    • Q33: 0.8 mm\u00b2 and black with white stripe<\/li>\n\n\n\n
    • Q34: changing to a very high resistance<\/li>\n\n\n\n
    • Q35: Not enough information<\/li>\n<\/ul>\n\n\n\n
      \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

      If 200 amperes flow from the positive terminal of a battery and operate the starter motor, how many amperes will flow back to the negative terminal of the battery? Question 31 options: Cannot be determined 200 amperes About one-half (100 amperes) Zero A braided wire running from the negative battery terminal to the body of […]<\/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-229395","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/229395","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=229395"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/229395\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=229395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=229395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=229395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}