Question

When the current is drawn from a cell in a closed circuit, the potential difference between the terminals of the cell is called:

• A. e.m.f
• B. p.d
• C. terminal voltage
• D. both (a) and (b)

Answer 1

The correct option is C

terminal voltage

Explanation for the correct option(s):

c) terminal voltage

1. The terminal voltage of a cell is the potential difference among its electrodes while the current is flowing through it.
2. When the circuit is turned on, the potential difference across the load terminals is called terminal voltage.
3. A voltmeter is used to measure it.

Explanation for the incorrect option(s):

a) emf

1. The electromotive force of a cell is the potential difference between its terminals when no current is extracted from it.
2. It is measured with a potentiometer.

b) p.d

1. In other terms, the potential difference is the difference in electric potential between two charged bodies.
2. The voltage between two places is a short phrase for the electrical force that will drive an electrical current between such sites.

d) both (a) and (b)

Option d is incorrect since option (c) is the correct answer.

Therefore, option c is the correct answer.