A. Static charge
B. Soft iron
C. Semi-conductor
D. Accelerating charge
0
A.C can not be used for_______________?
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. producing heat
B. producing light
C. Magnetizing iron
D. Producing magnetic field
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. A torque about horizontal axis
B. A torque about vertical axis
C. An upward force along the axis
D. No resultant force
0
The emf induced in a coil by a changing magnetic flux may have unit as______________?
A. Magnetic flux density
B. Torque
C. Mutual induction
D. Motional emf
0
Power loss in actual transformer is due to_________________?
A. ms-1A
B. ms-2A-1
C. kgms2A-1
D. kgm2s-1A-1
0
A.C and D.C have the same______________?
A. Small output
B. Eddy currents and magnetic hysterias
C. Soft iron core
D. Back emf
0
Which of the following uses electric energy and does not convert it into any other form ?
A. effect in charging a capacitor
B. effect in charging a battery
C. effect while passing through an inductance
D. heating effect through a resistance
0
Inductors acts as a short circuit for_______________?
A. transformer
B. motor
C. D.C generator
D. A.C generator
0
If the coil is wound on an iron core the flux through it will_______________?
A. AC
B. DC
C. Both A and B
D. none of these
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