QUIZ TEST


Welcome


You have to select only one out of 4


1. Principle of statically induced emf is used in

Transformer
Motor
Generator
Battery

2. Magnitude of statically induced emf depends on the

Coil resistance
Flux magnitude
Rate of change of flux
None of these

3. The property of a coil by which a counter e.m.f is induced in it, when the current through the coil changes, is called

Self inductance
Mutual inductance
Capacitance
None of these

4. If in an iron cored coil the iron core is removed so as to make the air-cored coil, the inductance of the coil will be

More
Less
The same
None of these

5. Lower the self-inductance of a coil

More will be the weber-turns.
More will be the emf induced
Lesser the flux produced by it
Smaller the delay in establishing steady current through it

6. When an electric current is passed through a bucket full of water, lot of bubbling is there. The electric current is

Ac.
DC
Pulsating
None of these

7. Property of a material which opposes the production of magnetic flux in it is called

mmf
reluctance
permeance
Permittivity

8. Unit of mmf is

AT
Weber/ampere
Henry
AT/m

9. An air gap is usually inserted in magnetic circuits to

Prevent saturation
Increase in mmf.
Increase in flux.
Increase in inductance

10. Permeability is reciprocal of

Reluctivity
Susceptibility
Permittivity
Conductivity