Welcome to ECE Board Exam Practice Quiz for Electrical Circuit. This set of practice quiz 2 will test your competence on the theories, concepts and problem solving involving Electrical Circuit. The objectives and goals of this quiz is to help engineering students familiarize concepts and theories as well as develop problem solving skills when answering questions related to the Electrical Circuit.

Electrical Circuit Test Bank

In this section are compiled practice quiz for Electrical Circuit that could be able to enhance your knowledge and skills in your preparation for the ECE Board Exam. The goal is to add thousands of questions for you to be familiarized and hopefully help you to be prepared. I am looking forward that this practice quiz will give you an additional confidence in taking your upcoming Engineering Board Exam.

Guidelines:

Read and understand each question before choosing the best answer.

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Once all questions are answered, you will be shown your rating.

You have to get 70% of the total items to pass the quiz.

You can re-take the quiz as many times as you want or until you are satisfied of your rating.

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Choose the letter of the best answer in each questions.

Property of an electric circuit that dissipates electric energy

Reactance

Impedance

Resistance

Conductance

Correct!

Wrong!

What is the specific resistance of a pure germanium?

55 Ω-cm

55 Ω-m

55 Ω-mm

55 kΩ-m

Correct!

Wrong!

What is the reciprocal of quality factor?

Power factor

Reactive factor

Dissipation factor

1/Q factor

Correct!

Wrong!

What is the reading of an ohmmeter for a shorted capacitor?

Zero

Infinity

kΩ

MΩ

Correct!

Wrong!

At what frequency will the current in a series RLC circuit reach its maximum value for an applied voltage of 15 V with R = 500 Ω, L = 100 μH and C = 0.001 μF?

503 kHz

403 kHz

603 kHz

303 kHz

Correct!

Wrong!

In a series RLC circuit

Increasing the frequency decreases the resistance

Increasing the frequency increases the resistance

Both XL and XC change as frequency changes

Impedance will always decrease

Correct!

Wrong!

Kirchhoff’s laws (KCL and KVL) are applicable to

DC circuits

AC circuits

DC as well as AC circuits

Passive networks alone

Correct!

Wrong!

If resonant frequency is 10 kHz and quality factor is 50, then

Bandwidth is 200 Hz

XL = is 50,000 Ω

R is 50 Ω

XC = is 50,000 Ω

Correct!

Wrong!

In a resonant circuit, if Q ≥ 10 resonant frequency __________ bandwidth.

Bisects

Exceeds

Is less than

Is equal to

Correct!

Wrong!

The current is ____________ times the maximum current at half-power points of a resonance curve.

0.707

1.414

0.5

0.632

Correct!

Wrong!

What rating of a resistor determines its ability to absorb heat?

Wattage

Ohmic

Current

Voltage

Correct!

Wrong!

Electron flow assumes charges flow from

Negative to positive

Negative to negative

Positive to negative

Positive to positive

Correct!

Wrong!

In an ac circuit with inductive reactance, the

Phase angle of the circuit is always 45˚

Voltage across the inductance must be 90˚ out-of-phase with the applied voltage

Current through the inductance lags its induced voltage by 90˚

Current through the inductance and voltage across it are180˚ out-of-phase

Correct!

Wrong!

As applied to a series RLC circuit, bandwidth means

The frequency range for maximum power transfer

The difference between the highest and lowest frequencies of the oscillator

The separation of the half-power points

The frequency at which XL = XC

Correct!

Wrong!

The voltage lags the current by cycle in a

Purely resistive circuit

Purely inductive circuit

Purely capacitive circuit

Circuit containing resistance, capacitance and inductance

Correct!

Wrong!

The average value of a triangular or sawtooth wave is __________ times its peak value.

0.577

0.500

0.318

0.637

Correct!

Wrong!

An intermittent and non-symmetrical alternating current like that obtained from the secondary winding of an induction coil.

Faradic current

Transient ac current

Inductive current

Capacitive current

Correct!

Wrong!

A capacitive load always has a ________ power facto

Leading

Lagging

Zero

Unity

Correct!

Wrong!

Which one of the following elements serves as a protection against overload?

Fuse

Switch

Resistor

Relay

Correct!

Wrong!

The open-circuit voltage at the terminal of load RL is 60V. Under the condition of maximum power transfer, the load voltage will be

60 V

15 V

20 V

30 V

Correct!

Wrong!

In a series RLC circuit

The current lags VL by 90˚

The current leads VL by 90˚

XL leads Xc by 90˚

Z = jXL at resonance

Correct!

Wrong!

What is the peak factor of a triangular wave?

1.16

1.73

1.41

1.11

Correct!

Wrong!

V_{L} = V_{C} in a series RLC circuit when

The value of the impedance is minimum

The power factor is zero

The current leads the total voltage by 90˚

The total voltage is zero

Correct!

Wrong!

What is considered as the most important value of a sine wave?