Cells are connected in series in order to
none of the above
increase the voltage rating
increase the current rating
increase the life of the cells
increase the voltage rating
Five 2 V cells are connected in parallel. The output voltage is
2 V
1 V
1.5 V
1.75 V
2 V
Which circuit element(s) will oppose the change in circuit current ?
Inductance and capacitance
Capacitance only
Resistance only
Inductance only
Inductance only
A crack in the magnetic path of an inductor will result in
unchanged inductance
increased inductance
reduced inductance
zero inductance
reduced inductance
A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by
variation in voltage to the coil
the resistance of magnetic path
change of number of turns of coil
variation in coil current
variation in voltage to the coil
Higher the self-inductance of a coil
longer the delay in establishing steady current through it
lower the e.m.f. induced
lesser its weber-turns
greater the flux produced by it
longer the delay in establishing steady current through it
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will
initially increase and then decrease
decrease
increase
remain the same
decrease
Which of the following inductor will have the least eddy current losses ?
Air core
Laminated iron core
Iron core
Powdered iron core
Air core
Air-core coils are practically free from
none of the above
eddy current losses
hysteresis losses
both and
both and
The magnitude of the induced e.m.f. in a conductor depends on the
flux density of the magnetic field
amount of flux cut
rate of change of flux-linkages
amount of flux linkages
rate of change of flux-linkages
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