ElectroMagnetic InductionHard
Question
A semicircular wire of radius R is rotated with constant angular velocity w about an axis passing through one end and perpendicular to the plane of the wire. There is a uniform magnetic field of strength B. The induced e.m.f. between the ends is -
Options
A.B ωR2 / 2
B.2B ωR2
C.is variable
D.none of these
Solution
e = 
effective length of the wire frame is 2R
⇒ e = 2BωR2
effective length of the wire frame is 2R
⇒ e = 2BωR2
Create a free account to view solution
View Solution FreeMore ElectroMagnetic Induction Questions
In the circuit shown switch S is connected to position 2 for a long time and then joined to position 1. The total heat p...An inductor of inductance L = 400 mH and resistors of resistances R1 = 2Ω and R2 = 2Ω are connected to a batte...For a LCR series circuit with an A.C. source of angular frequency ω :...In the circuit shown here, the point ′C′ is kept connected to point ′A′ till the current flowing...A d.c. motor has internal resistance 4 ohms. It is operated at 220 volts and draws 5 ampere current. The useful mechanic...