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In a circuit with a coil of resistance 2 ohms, the magnetic flux changes from 2.0 Wb to 10.0 Wb in 0.2 second. The charge that flows in the coil during this time is

a
5.0 coulomb
b
4.0 coulomb
c
1.0 coulomb
d
0.8 coulomb

detailed solution

Correct option is B

ΔQ=ΔϕR=(10−2)2=4C

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