Home
Class 12
PHYSICS
A coil having 200 turns has a surface of...

A coil having 200 turns has a surface of 0.15 `m^2`. A magnetic field of strength 0.2 T applied perpendicular to this changes to 0.6 T in 0.4 s. then the induced emf in the coil is …. V.

A

45

B

30

C

15

D

60

Text Solution

Verified by Experts

The correct Answer is:
B
`phi= n xx A xx B`
where `n-= " No. of turns"`
A `-=` Area of loop
B `-=` Magnetic field
`:. epsi= (Deltaphi)/(Deltat)= nA(DeltaB)/(Deltat)= 200 xx 0.15 xx (0.6-0.2)/(0.4)= 30V`
Promotional Banner

Similar Questions

Explore conceptually related problems

A conducting coil having 500 turns has cross sectional area 0.15 m^2 . A magnetic field of strength 0.2 T linked perpendicular to this area changes to 1.0 T in 0.4 sec. The induced emf produced in the coil will be ….. volt.

A coil has an area of 0.05 m^2 and has 800 turns. After placing the coil in a magnetic field of strength 4 xx 10^(-5) "Wb/m"^2 perpendicular to the field the coil is rotated through 90^@ in 0.1 s. The average emf induced is ____

Kamla peddles a stationary bicycle. The pedals of the bicycle are attached to a 200 turn coil of area 0.10 m^2 . The coil rotates at half a revolution per second and it is placed in a uniform magnetic field of 0.005 T perpendicular to the axis of rotation of the coil. What is the maximum voltage generated in the coil ?

Kamla peddles a stationary bicycle. The pedals of the bicycle are attached to a 100 turn coil of area 0.10 m^2 . The coil rotates at half a revolution per second and it is placed in a uniform magnetic field of 0.01 T perpendicular to the axis of rotation of the coil. What is the maximum voltage generated in the coil ?

Kamla peddles a stationary bicycle. The pedals of the bicycle are attached to a 100 turn coil of area 0.10 m^2 . The coil rotates at half a revolution per second and it is placed in a uniform magnetic field of 0.05 T perpendicular to the axis of rotation of the coil. What is the maximum voltage generated in the coil ?

A 1m long metal wire moving perpendicular with speed 5m//s is a magnetic field of 0.1T. Then the induced emf between two ends of wire is……V

Mutual inductance of system of two coils is 0.3 H. If the current in the one coil is changed from 10A to 40A in 0.01 sec, the average induced emf in the other coil is ...... volt.

A wheel of radius 2m having 8 conducting concentric spokes is rotating about its geometrical axis with an angular velocity of 10 rad/s in a uniform magnetic field of 0.2T perpendicular to its plane. The value of induced emf between the rim of the wheel and centre is ......... V