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Q.

Two coils A and B are wound on the same iron core as shown in figure. The number of turns in the coil A and B are NA and NB respectively. Identify the correct statement

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a

Both the coils have same magnitude of magnetic flux

b

The magnetic flux linked are in the ratio ϕAϕB=NANB

c

The induced emf across each coil are in the ratio EAEB=NANB2

d

Both the coils have same magnitude induced emf

answer is B.

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Detailed Solution

Let magnetic field inside core is B and area of cross-section is A.

 Flux through coil AϕA=NABA

Flux through coil B , ϕB=NBBA

 So, ϕAϕB=NABANBBA ϕAϕB=NANB

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Two coils A and B are wound on the same iron core as shown in figure. The number of turns in the coil A and B are NA and NB respectively. Identify the correct statement