ElectroMagnetic InductionHard
Question
A copper disc of radius 0.1m rotated about its centre with 10 revolutions per second in uniform magnetic field of 0.1 Tesla with its plane perpendicular field then emf induced across the radius of the disc is :-
Options
A.
volt
voltB.
volt
voltC.π × 10-2 volt
D.2π × 10-2 volt
Solution
emf across Radius = 
Bωr2 = B2πfr2
= Bπfr2
= 0.1 × π × 10 ×(0.1)2
= π × 10-2 volt.
Bωr2 = B2πfr2= Bπfr2
= 0.1 × π × 10 ×(0.1)2
= π × 10-2 volt.
Create a free account to view solution
View Solution FreeMore ElectroMagnetic Induction Questions
A 10 m. long copper wire while remaining in the east-west horizontal direction is falling down with a constant speed of ...The armature coil of dynamo is in motion. The generated induced emf varies and the number of magnetic lines of force als...A material rod, when placed in a strong magnetic field, aligns itself at right angles to the magnetic field. The nature ...When induced emf in inductor coil is 50% of its maximum value then stored energy in inductor coil in the given circuit w...Self inductance of solenoid is : -...