Electromagnetic Induction

A. ωB/r22-r12/Δt
B. ωB(r2-r1)2/Δt
C. ωB(r22-r12)/Δt
D. ωB(r22+r12)/Δt

A. μoN2A
B. μoN2/A
C. μoN2
D. BA

A. 1Hzs
B. 1.5Hzs
C. 106sec
D. 1sec

A. current flowing
B. number of turns per unit length
C. voltage produce
D. all

A. LI2
B. L2I/2
C. LI2/2
D. IL2

A. A D.C source
B. an A.C source
C. any source
D. all of the above

A. carbon brushes
B. coil
C. commutator
D. magnetic field

A. Vs/Vp = Np/Ns
B. Vs/Vp = Ns/Np
C. Vp/Vs = Ns/Np
D. Vp/Vs = Np/Ns

A. 0 volt
B. 3.125 volt
C. 31.25 volt
D. 0.03125 volt

A. Decreases the resistance of the solenoid
B. Reduces the effect of eddy current
C. Improves the flux linkage between the turns of the coil
D. Increases the mutual inductance between the solenoid and the core