MCQ
If the current $I$ through a resistor is increased by $100\% \ ($assume that temperature remains unchanged$), $ the increase in power dissipated will be :
- A$100\%$
- B$200\%$
- ✓$300\%$
- D$400\%$
✓
Answer
Correct option: C.
$300\%$
The heat generated by a resistor is directly proportional to square of current. Hence, when current becomes double, dissipation of heat will multiply by $2^2 = 4$. This means there will be an increase of $300\%.$
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