07(P)%20-%20Electromagnetic%20Induction

# 07(P)%20-%20Electromagnetic%20Induction - 7 ELECTROMAGNETIC...

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7 - ELECTROMAGNETIC INDUCTION Page 1 1) The rate of change of current in one of the coils ( a system formed by two coils ) is 1.6 A / s. Due to this, induced emf in the other coil is 25.6 × 10 3 μ μμ V. Find mutual inductance of the system formed by coils. ( July, 2000 ) ( Ans: 16 × 10 - 3 H ) 2) The number of turns in a coil is 10000 and area of each turn is 4 cm 2 . It is placed perpendicularly to the magnetic induction B. If the coil is rotated through 90 ° from this position, then find the charge induced. [ R = 10 , B = 6 Wb / m 2 ] ( March, 1998 ) ( Ans: 2.4 coulomb ) 3) The total length of wings of an aeroplane is 15 m. Its horizontal velocity is 720 km / hr. Calculate the induced electromotive force between the two ends of its wings. The value of vertical component of earth’s magnetic field is 4 × 10 - 5 Tesla. ( October, 1997 ) ( Ans: 0.12 V ) 4) There are 50 turns in the coil and the flux linked with each of its turn is 0.2 weber. If 5 ampere current passes through the coil, find self

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07(P)%20-%20Electromagnetic%20Induction - 7 ELECTROMAGNETIC...

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