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Concepts Of Physics MCQ Edition [Volume 2]

Exam: Concepts Of Physics MCQ Edition [Volume 2]
Subject: Physics
Chapter: Electric Field and Potential

Concepts Of Physics MCQ Edition [Volume 2] · Physics · Electric Field and Potential

To move a charge of 0.01 C from point A to point B against an...

To move a charge of

0.01 \text{ C}

from point

A

to point

B

against an existing electric field,

12 \text{ J}

of work must be performed. What is the potential difference

V_B - V_A

?

Options

A $1200 \text{ V}$
B $120 \text{ V}$
C $-1200 \text{ V}$
D $0.12 \text{ V}$

Correct answer

A. $1200 \text{ V}$

Step-by-step solution

The work done by an external agent in moving a charge

q

from point

A

to point

B

against an electric field is given by

W = q(V_B - V_A)

.

Substituting the given values:

12 = 0.01(V_B - V_A)

V_B - V_A = \dfrac{12}{0.01} = 1200 \text{ V}

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