A loop of area 1m2 is placed in a magnetic field B=2T, such that plane of the loop is parallel to the magnetic field. If the loop is rotated by 180o, the amount of net charge passing through any point of loop, if its resistance is 10Ω is :
A
0.4C
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B
0.2C
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C
0.8C
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D
0C
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Solution
The correct option is A0.4C ϕi=BScos0o=2Wb ϕf=BScos180o=−2Wb |Δϕ|=4Wb |Δq|=|Δϕ|R=410=0.4C