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Question

In the circuit shown below, the safe maximum value for the current I is

A
0.5 A
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B
0.1 A
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C
1.0 A
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D
0.05 A
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Solution

The correct option is B 0.1 A
Maximum current for 100Ω, 1 W;

I=PR=0.1A

Maximum current for 2Ω, 0.5 W;

I=0.52=0.5A

Maximum current for 1Ω, 0.25 W;

I=0.25=0.5A

The safe maximum value of current I which can flow through series resistances is 0.1 A

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