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Q.

The magnetic induction field at a distance of 1cm from a long straight current carrying conductor is 2x10-5T. The current in the conductor is

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a

1A

b

2A

c

2mA

d

1mA

answer is A.

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Detailed Solution

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B=μ0i2πr⇒2×10−5=4π×10−7×i2π×1×10−2⇒i=1A

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