Consider two coils A and B separated by a certain distance. It is known that the magnetic flux passing through B is 10−3 Wb when a 4 A current is passing through coil A and no current is passing through coil B. Now, the current in coil A is made zero and the current in coil B is 2 A, then find the flux passing through coil A :
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a
5×10−3Wb
b
4×10−4Wb
c
5×10−4Wb
d
2×10−3Wb
answer is C.
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Detailed Solution
Magnetic flux linked with coil AϕB=MIA∴M=ϕBIA=10−34Magnetic flux linked with coil AϕA=MIB=10−34×2=5×10−4Wb