Generate Quiz 6997FF624E36D

I1=5.0A is the initial current.

I2=0A for the final current

Change in current, dl=I1−I2=5A

Time spent charging, t=0.1s

Average emf, e = 200V

The relationship for average emf for the coil’s self inductance (L) is as follows:

e=L x current change rate

L=e/rate of current change

L = 200/5/0.1

L = 4H

Thus, the coil’s self-inductance is 4H.

One north pole and one south pole are present in each half of a magnet, even if it is broken in two.

Because of the way the magnetic force acts, the velocity and magnetic force direction are always perpendicular to one another.
Work done will be “zero” if q = 90 because force and displacement are perpendicular if force and velocity are. W = FS cos q.

Given: L = 15 cm = 0.15 m is the length.
N = 300 is the number of turns.

Present = I = 5 A
Free space permittivity = μo = 4π × 10-7
B = magnetic field =?
Answer:
n = 300 / 0.15 = 2000 turns per meter is the number of turns per unit length.
As is well known:
B = μonl = 4π × 10-7 × 2000 × 5 = 1.37 × 10-2 W/m²

The right response is energy. A key idea in electromagnetism, Lenz’s law specifies the direction of an induced current in a conductor when it is exposed to a fluctuating magnetic field. Lenz’s law states that the induced current will flow in a direction that opposes the original magnetic field’s change by producing a magnetic field. Energy is converted as a result of this resistance to the magnetic field change, usually as mechanical work or electrical energy.

Its winding is two-phase.

Since the flux change is negative, the answer should be C because negative times negative equals positive.