a. A lamp of resistance 15 is connected to a battery of e.m.f. 4.5 V. Calculate
Question:
a. A lamp of resistance 15 Ω is connected to a battery of e.m.f. 4.5 V.
Calculate the current in the lamp.
b. Calculate the resistance of the filament of an electric heater that takes a current of 6.5 A when it is connected across a mains supply of 230 V.
C. Calculate the voltage that is required to drive a current of 2.4 A through a wire of resistance 3.5 Ω.
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Related Book For 
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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