ElectroMagnetic InductionMedium
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
Two conducting coils are placed co-axially now a cell is connected in one coil then they will :-...Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross sectional area A = 10 cm2 and length ...The current flows from A to B as shown in figure, then the direction of the induced current in the loop will be :...A small, circular loop of wire is placed inside a long solenoid carrying a current. The plane of the loop contains the a...A metal disc rotates freely, between the poles of a magnet in the direction indicated. Brushes P and Q make contact with...