Explore topic-wise MCQs in Engineering.

The impedance of an RL circuit varies inversely with frequency.

In an RL circuit, part of the power is resistive and part is reactive.

In a lag network, the output voltage lags the input voltage in phase.

The roll-off rate of a basic RC or RL filter is 20 dB per decade.

In an RL high-pass filter, the output is taken across the inductor and the output leads the input.

In an RC high-pass filter, the output is taken across the resistor and the output leads the input.

Critical frequencies are also called 3 dB frequencies.

A series resonant band-stop filter consists of a 68 resistor, a 110 mH coil, and a 0.02 F capacitor. The internal resistance, R_W, of the coil is 4 . Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f₀?

A sinusoidal voltage with a peak-to-peak value of 18 V is applied to an RC low-pass filter. If the reactance at the input frequency is zero, the output voltage is

V_out = 500 mV, and V_in = 1.3 V. The ratio V_out/ V_in expressed in dB is

An RL high-pass filter consists of a 470 resistor and a 600 mH coil. The output is taken across the coil. The circuit's critical frequency is

A parallel resonant band-pass filter consists of a 6.8 resistor in series with a parallel network made up of an 8 H coil and a 120 pF capacitor. The output is taken across the capacitor/coil. Assume R_W = 0 . What is the center frequency of the filter?

A series resonant band-pass filter consists of a 2 mH coil, a 0.005 F capacitor, and a 120 resistor. The winding resistance of the coil is 12 . The output voltage is taken off the resistor. Input voltage is 12 V_rms. What is the output voltage magnitude at the center frequency (f₀)?

An RC low-pass filter consists of a 120 resistor and a 0.002 F capacitor. The output is taken across the capacitor. The circuit's critical frequency is

Referring to Problem 15, if the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?

A power factor of 1 indicates a purely reactive circuit, and a power factor of 0 indicates a purely resistive circuit.

The power factor indicates how much of the apparent power is reactive power.

In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency

An RL low-pass filter consists of a 5.6 mH coil and a 3.3 k resistor. The output voltage is taken across the resistor. The circuit's critical frequency is

In a series resonant band-pass filter, a lower value of Q results in

A parallel resonant band-pass filter consists of a 90 resistor in series with a parallel network made up of a 60 mH coil and a 0.02 F capacitor. The output is taken across the capacitor/coil. The coil winding has a resistance of 20 . What is the center frequency of the filter?

The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is

A 1.5 k resistor and a coil with a 2.2 k inductive reactance are in series across an 18 V ac source. The power factor is

The voltages in Problem 5 are measured at a certain frequency. To make the resistor voltage less than the inductor voltage, the frequency is

In a series RL circuit, 12 V rms is measured across the resistor, and 14 V rms is measured across the inductor. The peak value of the source voltage is

To increase the current in a series RL circuit, the frequency

A 470 resistor and a coil with 125 inductive reactance are in parallel. Both components are across a 15 V ac voltage source. Current through the inductor is

In an RL differentiator, when the input pulse goes from its low level to its high level,

Referring to the above figure, determine the voltage level that the output will reach during the pulse.

An RC differentiator acts as a

Referring this figure, on the falling edge,

If a periodic pulse waveform has a pulse width and the time between pulses each equal to or greater than five time constants, the capacitor will

What is the highest frequency contained in a pulse that has a rise and fall time equal to 10 microseconds (10 s)?

In electronic systems, repetitive-pulse waveforms are encountered

The output of an RC integrator is taken across the

In an RC differentiator, responding to repetitive pulses, the average value of the output

If the RC time constant of an integrator is increased, as the time constant is increased

In an RC differentiator, the sum of the capacitor voltage and the resistor voltage at any instant

When a 24 V input pulse with a width equal to five time constants is applied to an RC integrator, the capacitor charges to

Find the current through R₁ in the given circuit.

A 120 V voltage source has a source resistance, R_S, of 60 . The equivalent current source is

A 12 V source has an internal resistance of 90 . If a load resistance of 20 is connected to the voltage source, the load power, P_L, is

In a two-source circuit, one source acting alone produces 12 mA through a given branch. The other source acting alone produces 10 mA in the opposite direction through the same branch. The actual current through the branch is

Determine I_N for the circuit consisting of V_S, R₁, R₂, and R₃ shown in the given circuit.

Electromagnetic induction is the force that produces a magnetic field.

The tesla is the unit of magnetic flux.

Ampere-turn is the unit of magnetomotive force (mmf).

A relay is an electromagnetically controlled mechanical device in which electrical contacts are opened or closed by a magnetizing current.

Reluctance in a magnetic circuit is analogous to current in an electrical circuit.

An ideal voltage source has zero internal resistance.