Home
Class 12
PHYSICS
The self induced emf of a coil is 25 vol...

The self induced emf of a coil is 25 volts. When the current in it is changed at uniformed rate from 10 A to 25 A in 1s, the change in the energy of the inductances is

A

637.5 J

B

437.5 J

C

540 J

D

740 J

Text Solution

Verified by Experts

The correct Answer is:
B
`V=(Ldi)/(dt)& (di)/(dt)=15(A)/(S)`
`25=Lxx15 rArr L=(5)/(3)`
`DeltaE=(1)/(2)L(25^(2)-10^(2))=(1)/(2)xx(5)/(3)xx525`
`DeltaE=437.5J`
Promotional Banner

Similar Questions

Explore conceptually related problems

The self-induced e.m.f in a 0.1H coil when the current in it is changing at the rate of 200 ampere//second is

When current in coil is uniformely reduced from 2A to 1A in 1 ms , the induced emf is 5V. The inductance of coil is :

The value of the self inductance of a coil is 5 H. If the current in the coil changes steadily from 1A to 2A in 0.5 seconds, then the magnitude of induced emf is __

The mutual inductance between two coils is 2.5 H. If the current in one coil is changed at the rate of 1 As^(-1), what will be the emf induced in the other coil?

An average induced e.m.f. of 1V appears in a coil when the current in it is changed from 10 A in one direction to 10A in opposite direction in 0.5 sec. self-inductance of the coil is

The mutual inductance between two coils is 3 H. If the current in one coil is changed at a rate of 5 A// s , what will be the emf induced in the other coil?

An average induced e.m.f of 2V appers in a coil when the current in it is changed from 10 A in opposite direction in 0.5 sec. The self inductance of the coil is

The mutual inductance between two coils is 0.5 H .It the current in one coil is changed at the rate of 5 A//s ,what will be the emf induced in the other coil?