CBSE
2020
Class Class 12 · Physics
1 Marks · Mcq
✅ Verified
A current of 0.8 A flows in a conductor of 40 $\Omega$ for 1 minute. The heat produced in the conductor will be
A. 1445 J
B. 1536 J
C. 1569 J
D. 1640 J
✅ Answer & Solution
✅ Correct Answer: B
Using the formula:
$$H = I^2 R t$$
$$H = (0.8)^2 \times 40 \times 60 = 0.64 \times 2400 = 1536 \text{ J}$$
✅ Verified by Super Admin
