Physics
Grade-9
Easy
Question
A charge of 5 C flows through the copper wire for 2 s connected across a cell of potential difference 20 V, the work done is
- 4 J
- 200 J
- 100 J
- 50 J
Hint:
W = QV
The correct answer is: 100 J
- Using formula: W = QV
- Where, W = work done, Q = charge, V = potential difference
- Therefore, W = 5×20 = 100J.
- So, the correct option is c.
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