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Q.

A 5-A fuse wire can withstand a maximum power of 1 W in circuit. The resistance of the fuse wire is

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a

0.2  Ω

b

5  Ω

c

0.4  Ω

d

0.04  Ω

answer is D.

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Detailed Solution

Power, P = i2 R⇒     R=Pi2Given, P = 1 W, i = 5 A∴    R= 152 = 0.04  Ω
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