Questions
If a coil of 40 turns and area 4 cm2 is suddenly removed from a magnetic field, it is observed that a charge of flows into the coil. If the resistance of the coil is the magnetic flux density in Wb/m2 is
detailed solution
Correct option is B
ΔQ=ΔϕR=n×BAR⇒B=ΔQ⋅RnA=2×10−4×8040×4×10−4=1 Wb/m2Talk to our academic expert!
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A circular ring, made of copper wire, has area of 30 cm2 and resistance of 10 . It is placed in a uniform magnetic field of induction 2 tesla with its plane perpendicular to the field. When the loop is rotated through an angle of about its diameter, coulomb of charge flows through it. Then is
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