A. Determine the self-inductance of a coil which produces 5V when the current changes from 3A to 2A in one millisecond. B. The current in an inductor is changing at the rate of 100 A/s, and the inductor emf is 40 V. What is its self-inductance? C. When a current of 2mA is supplied to a coil with 100 turns, a magnetic flux of magnitude 200mWb is linked with it. Find the self-inductance of this coil. D. A magnet from which emanates 800 maxwells of flux is inserted through a coil of 1000 turns. It is withdraws within 0.15seconds. What is the voltage induced across the coil? (Note 1 Weber = 1x10 Maxwell)

Ip Ep=40 V f = 60 Hz N₂= 20- N₁ = 120 Find the maximum flux om om = Find the magnitude of the induced secondary voltage Es Es = units + Is Es units If the coefficient of coupling (k)= 0.75, determine the magnitude of the induced secondary voltage Es Esk=0.75 = units

How many turns must a coil on non-magnetic material have, if the length of the coil is 0.5 metres and its diameter is 0.01 metres while its inductance is 1 mH.

Probl The rectangular coil in the figure below is in a field B = 0.01a,T. a. Find the torque about the z axis when the coil is in the position shown and carries a current of 10 A b. Find the torque if the coil turns through 90°7 0.2m & 0.2m 1-10A

What is the induced potential difference at t=2s?

Solve

#16

A sinusoidal voltage has a value of 100 volts at 2.5 milliseconds and completes one cycle.It takes 20 milliseconds. Then find the maximum cost and the time to reach it for the first time