DC & AC Circuits Quiz

What is the primary law used for analyzing DC circuits?

• Faraday's Law

• Ohm's Law

• Kirchhoff's Law

• Lenz's Law

What type of waveform is most commonly associated with AC circuits?

• Sinusoidal wave

• Triangular wave

• Sawtooth wave

• Square wave

Which of the following is an advantage of AC over DC?

• AC has higher copper losses

• AC requires more maintenance

• AC can be easily transformed to different voltages

• AC is more dangerous

According to Faraday's First Law, what happens when a conductor is placed in a varying magnetic field?

• An electromotive force is induced

• A constant current is induced

• A voltage drop occurs

• No current is induced

What does the term 'RMS' stand for in electrical engineering?

• Root Mean Square

• Real Mean Standard

• Relative Maximum Signal

• Root Maximum Square

What is the average value of a sinusoidal waveform over one complete cycle?

• 0

• Vm/2

• 2Vm/π

• Vm

What is the formula for calculating the power factor in an AC circuit?

• Real Power/Apparent Power

• Voltage/Current

• Current/Voltage

• Reactive Power/Real Power

What does Lenz's Law state about induced electromotive force?

• It opposes the change in magnetic flux

• It enhances the change in magnetic flux

• It has no effect on magnetic flux

• It is always positive

What is the significance of the phase difference in AC circuits?

• It determines the voltage level

• It shows how much one waveform leads or lags another

• It indicates the frequency of the circuit

• It measures the resistance in the circuit

What is the peak factor in an AC waveform?

• The ratio of RMS value to average value

• The ratio of peak value to average value

• The ratio of peak value to RMS value

• The ratio of average value to peak value