A car battery has an e.m.f. of 12 V and an internal resistance of 0.04 . The

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A car battery has an e.m.f. of 12 V and an internal resistance of 0.04 Ω. The starter motor draws a current of 100 A.

a. Calculate the terminal p.d. of the battery when the starter motor is in operation.

b. Each headlamp is rated as ‘12 V, 36 W’. Calculate the resistance of a headlamp.

c. To what value will the power output of each headlamp decrease when the starter motor is in operation? (Assume that the resistance of the headlamp remains constant.)

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Cambridge International AS And A Level Physics Coursebook

ISBN: 9781108859035

3rd Edition

Authors: David Sang, Graham Jones, Gurinder Chadha, Richard Woodside

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Question Posted: Sep 27, 2021 02:26 AM

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A car battery has an e.m.f. of 12 V and an internal resistance of 0.04 . The

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a To calculate the terminal pd of the battery when the starter motor is in operation we c...View the full answer

Cambridge International AS And A Level Physics Coursebook

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