Current Electricity - Result Question 72
77. A 5-ampere fuse wire can withstand a maximum power of 1 watt in the circuit. The resistance of the fuse wire is
[2005]
(a) $0.04 ohm$
(b) $0.2 ohm$
(c) $5 ohm$
(d) $0.4 ohm$
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Answer:
Correct Answer: 77. (a)
Solution:
- (a) $R=\frac{P}{I^{2}}=\frac{1}{25}=0.04 \Omega$
