A. Small output
B. Eddy currents and magnetic hysterias
C. Soft iron core
D. Back emf
0
The emf induced in a coil by a changing magnetic flux may have unit as______________?
0
The emf induced in a conductor of unit length moving with unit velocity at right angles to a magnetic field is equal to_____________?
A. ms-1A
B. ms-2A-1
C. kgms2A-1
D. kgm2s-1A-1
0
A small coil lies inside a large coil. The two coils are horizontal concentric and carry currents in opposite directions. The large coil will experience______________?
A. Magnetic flux density
B. Torque
C. Mutual induction
D. Motional emf
0
A.C can not be used for_______________?
A. A torque about horizontal axis
B. A torque about vertical axis
C. An upward force along the axis
D. No resultant force
0
Magnetic compass needle will be deflecting if it is kept near________________?
A. producing heat
B. producing light
C. Magnetizing iron
D. Producing magnetic field
0
Long distance transmission is easy for________________?
A. Static charge
B. Soft iron
C. Semi-conductor
D. Accelerating charge
0
The out put voltage of a transformer is 3 times the input voltage then turns ratio will be________________?
A. D.C voltage
B. A.C voltage
C. Half A.C voltage
D. Half D.C voltage
0
An electric current induced within the body of a conductor when that conductor either moves through a non uniform magnetic field or in a region where there is a change in magnetic flux is called_____________?
A. 3-Jan
B. 3
C. 1
D. 6
0
Transformer works on the principle of________________?
A. Induced current
B. Eddy current
C. Back emf
D. None of the above
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