Quiz on Alternating Current (AC)

What is the primary difference between AC and DC?

• DC flows in one direction

• AC has a constant voltage

• AC flows in one direction

• DC has a variable voltage

What is the main principle behind the operation of an AC generator?

• Electromagnetic induction

• Thermal conduction

• Chemical reaction

• Mechanical friction

In an AC circuit, what is the effect of a resistor?

• Generates magnetic fields

• Increases voltage

• Stores electrical energy

• Opposes the flow of current

What is the phase difference between voltage and current in a purely capacitive circuit?

• 0 degrees

• 90 degrees

• 180 degrees

• 270 degrees

What is the term for the overall resistance in an RLC circuit?

• Impedance

• Voltage

• Current

• Reactance

What type of waveform is most commonly associated with AC?

• Square wave

• Triangular wave

• Sinusoidal wave

• Sawtooth wave

What happens to the induced current when there is relative motion between a conductor and magnetic field lines?

• It stops

• It is produced

• It becomes constant

• It decreases

In a three-phase AC generator, how many degrees apart are the phases?

• 60 degrees

• 180 degrees

• 90 degrees

• 120 degrees

What is the average value of current in a full-wave rectified circuit?

• Zero

• Half the peak value

• Equal to peak value

• Twice the half-wave average

What is the effect of inductance in an AC circuit?

• Increases resistance

• Stores energy in a magnetic field

• Decreases voltage

• Stores energy as heat