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A magnetic field of $2 \times 10^{- 2} T$ acts at right angles to a coil of area $100 c m^{2}$ with 50 turns. If the average emf induced in the coil is $0.1 V$ when it is removed from the field in time $t .$ The value of $‘ t ’$ is

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detailed solution

Correct option is A

B=2×10−2T A=100cm2=100×10−4m2 N=50, e=0.1Ve=dϕdt=(ϕ2−ϕ1)tCoil is removed from the field ⇒ϕ2=0e=ϕ1t=BANtt=BANe=2×10−2×10−2×500.1=0.1 s

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A magnetic field of 2×10−2T acts at right angles to a coil of area 100 cm2 with 50 turns. If the average emf induced in the coil is 0.1 V when it is removed from the field in time t. The value of ‘t’ is

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Ready to Test Your Skills?

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A magnetic field of $2 \times 10^{- 2} T$ acts at right angles to a coil of area $100 c m^{2}$ with 50 turns. If the average emf induced in the coil is $0.1 V$ when it is removed from the field in time $t .$ The value of $‘ t ’$ is