a. State what is meant by the term e.m.f. of a cell. A student connects a high-resistance

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a. State what is meant by the term e.m.f. of a cell.

A student connects a high-resistance voltmeter across the terminals of a battery and observes a reading of 8.94 V. He then connects a 12 Ω resistor across the terminals and finds that the potential difference falls to 8.40 V.

b. Explain why the measured voltage falls.

c i. Calculate the current in the circuit.

ii. Calculate the internal resistance of the cell.

iii. State any assumptions you made in your calculations.

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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. State what is meant by the term e.m.f. of a cell. A student connects a high-resistance

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a The term emf of a cell refers to the electric potential difference voltage of the cell when there ...View the full answer

Cambridge International AS And A Level Physics Coursebook

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