Question

The positively charged particle is released from the rest in a uniform electric field. The electric potential energy of the charge
a. decreases because the charge moves along the electric field.
b. decreases because the charge moves opposite the electric field.
c. remains constant because the electric field is uniform.
d. increases because the charge moves along the electric field.

• A. c
• B. d
• C. a
• D. b

Hint:

A positive charge moves along the electric field, and the field does positive work on it.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
A positive charge feels a force along the field, so when released from rest it moves along the field direction.

Step 2: Energy change
The field does positive work, so \(\Delta U=-W<0\). Its potential energy decreases and the lost energy appears as kinetic energy.

Step 3: Result
The potential energy decreases because the charge moves along the field. This is statement a.

Final Answer:
The potential energy decreases because the charge moves along the field. \[ \boxed{\text{(C) }\text{a}} \]