Electromagnetic Induction

A piece of conductor 10 cm long moves across a magnetic field of 10,000 gauss at a velocity of 120 cm/sec. What voltage appears across the conductor?

On triling the number of turns of a coil the inductance

Two coupled coils have self-inductances L1= 2 H and L2= 0.5 H, and a coefficient of coupling k= 0.9. Determine the turns N1/N2 of the two coils.

A piece of conductor 20 cm long moves across a magnetic field of 10,000 gauss at a velocity of 120 cm/sec. What voltage appears across the conductor?

Two coils having inductances of 20 mH and 50 mH are wound on top of each other. Calculate the mutual inductive between the two coils if the coupling coefficient k= 0.98

When a conductor is stationary and the magnetic field is moving or changing, the emf is called:

The current in the coil of a large electromagnet falls from 6A to 2A in 10ms. The induced emf across the coil is 100v. What is the self- inductance of the coil?

What is the emf induced across an inductor with 150 mH inductance carrying a steady current of 4 amperes?

A 50 cm long conductor is moved in a field of density 1 Wb/m² at a velocity of 30 m/s. What is the emf induced if the motion is perpendicular to the field?

Two identical coupled coils have an equivalent inductance of 80mH when connected in series aiding and 35mH in series opposing. What is the value of the coefficient of coupling K.

What is the emf induced in a coil of 500 turns with a constant flux of \(10^{8}\) maxwells?

When one coil of a magnetically coupled pair has a current of 5 A, the resulting fluxes \(\Phi_{11}\) and \(\Phi_{12}\) are 0.4 mWb and 0.8 mWb, respectively. If the turns are \(N_1 = 500\) and \(N_2 = 1{,}500\), find \(L_1\).

A coil of wire wound, with or without a magnetic core designed to have a higher self-inductance than a straight wire.

The type of emf induced by neighboring coils.

Two coupled coils have self-inductances \(L_1 = 50\) mH and \(L_2 = 200\) mH, and a coefficient of coupling k = 0.50. If \(i_1 = 5\sin 400t\) A, find the voltage at coil 2.

A conductor of length 1 meter moves at right angles to a magnetic field of flux density 1 Wb/m² with a velocity of 25 m/s. What is the induced emf in the conductor?

What is the value of inductance of a coil that induces 100 V when the current changes at the rate of 2 mA in 2 microseconds?

How much energy is stored by a 100 mH inductance with a current of 1 A?

A coil of 100 turns is cut by a magnetic field that increases at the rate of 40 Wb/min. What is the induced voltage?

The law that induced emf and current always opposes the cause producing them was discovered by