Question Detail

PHY 102 Current Electricity Objective Question
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Question

The electromotive force (e.m.f. E) of a battery is defined as the potential difference across its terminals under what condition?
Options
A When maximum current is flowing.
B When the battery is short-circuited.
C On open circuit, when no current is flowing.
Correct Answer
D When the internal resistance is zero.
Correct Answer

Option C is the correct answer.

Detailed Explanation

Page 10 states, "The electromotive force or e.m.f. (E) is the potential difference across the terminals of a battery (or any other generator) on open circuit, that is, when no current is flowing."

Hint

Think about the "ideal" voltage of the source before it supplies any current.

Question Info

Course: PHY 102
Topic: Current Electricity
Type: Objective
Difficulty: Not specified
Question 663 of 1819
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