A. Yes
B. No
Related Mcqs:
- A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage ?
A. 0.01 s
B. 0.1 s
C. 0.5 s
D. 5 s - The only difference between construction of D.C generator and A.C generator is that of_______________?
A. carbon brushes
B. coil
C. commutator
D. magnetic field - If current in a conductor increases then according to Lenz’s law self-induced voltage will____________?
A. aid the increasing current
B. tend to decrease the amount of cur-rent
C. produce current opposite to the in-creasing current
D. aid the applied voltage - An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is____________?
A. 20 Wb
B. 2 Wb
C. 0.2 Wb
D. 0.02 Wb - A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by________________?
A. variation in coil current
B. variation in voltage to the coil
C. change of number of turns of coil
D. the resistance of magnetic path - The out put voltage of a transformer is 3 times the input voltage then turns ratio will be________________?
A. 3-Jan
B. 3
C. 1
D. 6 - The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as__________?
A. self-inductance
B. mutual inductance
C. series aiding inductance
D. capacitance - A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be____________?
A. 10 V
B. 15 V
C. 25V
D. 50V - emf induced in a circuit according to Faradays law depends on the_____________?
A. maximum magnetic flux
B. rate of change of magnetic flux
C. change in magnetic flux
D. initial magnetic flux - 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
