A coil of wire is arranged with its plane perpendicular to a uniform magnetic field o flux density B. when the radius of the coil increases from r1 to r2 in time Δt then what is the emf induced in the coil ?
A. ωB/r22-r12/Δt
B. ωB(r2-r1)2/Δt
C. ωB(r22-r12)/Δt
D. ωB(r22+r12)/Δt
Related Questions on Electromagnetic Induction Mcqs
A. 1Hzs
B. 1.5Hzs
C. 106sec
D. 1sec
Self inductance of a coil depends upon________________?
A. current flowing
B. number of turns per unit length
C. voltage produce
D. all
For electroplating we use_________________?
A. A D.C source
B. an A.C source
C. any source
D. all of the above