NEET | 2017ElectroMagnetic InductionEasy

Question

A long solenoid of diameter 0.1 m has 2 × 104 turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0A from 4 A in 0.05 s. If the resistance of the coil is 10π2Ω. the total charge flowing through the coil during this time is :

Options

A.

16 μC

B.

32 μC

C.

16 π μC

D.

32 π μC

Solution

q=∆ϕ∆t. 1R∆t
q=μ0nNπr2∆i∆t1R∆t
q=4π×10-7×2×104×100×π×(10-2)2×4.05110π2×0.05
q = 32 μC

Create a free account to view solution

View Solution Free
Topic: ElectroMagnetic Induction·Practice all ElectroMagnetic Induction questions

More ElectroMagnetic Induction Questions

A long solenoid has 1000 turns. When a current of 4A flows through it the magnetic flux linked with each turn of the sol...Two long parallel metallic wires with a resistance ′R′ form a horizontal plane. A conducting rod AB is on th...An a.c. of 50 Hz and 1 A peak value flows in the primary coil of a transformer. The mutual inductance between primary an...In an AC generator, a coil with N turns, all of the same area A and total resistance R, rotates with frequency ω in...The phase difference between current and voltage in an AC circuit is radian, If the frequency of AC is 50 Hz, then the p...