Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Electrostatic Potential and Capacitance

Question:

Electric field in a region is given by $\vec{E} = 2\hat{i} + 3\hat{j} -4 \hat{k}$  V/m. The potential difference between points (0, 0, 0) and (1,2,3) will be

Options:

2V

5V

4V

6V

Correct Answer:

4V

Explanation:

$\vec{E} = 2\hat{i} + 3\hat{j} -4 \hat{k}$  V/m

$\vec{\Delta r} = \hat{i} + 2\hat{j} + 3\hat{k}$

P.D. across the points = $ -\vec{E} .\vec{\Delta r} = 4V$