ET M3 Quiz 1

What is inductance in an electrical circuit?

• The ability of a conductor to resist the change of current flow

• The ability of a conductor to store energy when the current changes

• The ability of a conductor to induce voltage in itself when the current changes

• The ability of a conductor to produce a magnetic field when the current changes

What is the basic unit of measure for inductance?

• Henry

• Ampere

• Volt

• Ohm

What is the self-induced voltage across a 4h inductance produced by a current change of 12 A per second?

• 6 V

• 12 V

• 24 V

• 48 V

What is the phase relationship between the applied voltage and the circuit current in an inductor in series connection?

• Voltage leads current by 90 degrees

• Voltage lags current by 180 degrees

• Voltage leads current by 180 degrees

• Voltage lags current by 90 degrees

How is the total inductance calculated for inductors in series connection?

• By dividing the individual inductances

• By multiplying the individual inductances

• By taking the reciprocal of the sum of the reciprocals of individual inductances

• By adding the individual inductances

What is the mutual inductance in a circuit?

• The e.m.f generated in a coil due to the magnetic field of another coil

• The inductance of two coils in series

• The inductance of a single coil

• The e.m.f generated in a coil due to its own magnetic field

What is the effect of increasing the current in an inductor?

• The magnetic field strength decreases

• The inductance increases

• The inductance decreases

• The magnetic field strength increases

What is the symbol used to represent inductance in electrical formulas?

• L

• R

• V

• I

What is the characteristic of inductance in an electrical circuit?

• It opposes the change of voltage

• It supports the change of voltage

• It opposes the change of current flow

• It supports the change of current flow

What is the e.m.f generated in a second coil when an alternating magnetic field generated by one coil cuts through its turns?

• External e.m.f

• Mutual induction e.m.f

• Self-induced e.m.f

• Induced e.m.f