Welcome to ECE Board Exam Practice Quiz for Electrical Circuit. This set of practice quiz 9 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.

The correct answer will be reveal after you have chosen your answer for every questions

There is no time limit, answer the questions at your own pace.

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.

Barium-strontium titanite dielectric material is also called

Ceramic

Polyster

Electrolytic

Bakelite

Correct!

Wrong!

The power factor of a circuit is equal to

RZ

XC/Z

XL/Z

R/Z

Correct!

Wrong!

What increases the resistance of wire at high frequencies?

Temperature

Voltage

Skin effect

Insulation

Correct!

Wrong!

If voltage across the plates of 2 F capacitor is increased by 4 V, then charge on the plates will

Decrease by 2 C

Increase by 2 C

Decrease by 4 C

Increase by 4 C

Correct!

Wrong!

What is the most convenient way of achieving large capacitance?

By using multi-plate construction

By using air as dielectric

By decreasing distance between plates

By using dielectric of low permittivity

Correct!

Wrong!

For a linear circuit, _______ voltage or current is used to calculate average power.

RMS

Peak

Average

Instantaneous

Correct!

Wrong!

The wavelength of an alternating waveform depends upon the _______ of the variation.

Period

Number

Frequency

Amplitude

Correct!

Wrong!

Which of the following is also known as anti-resonant circuit?

Parallel resonant circuit

Series resonant circuit

Tuned circuit

Tank circuit

Correct!

Wrong!

The distance between the capacitor plates increases two times, then its capacitance

Increases two times

Increases four times

Decreases two times

Decreases four times

Correct!

Wrong!

In adding or subtracting phasor quantities, ________ form is the most convenient.

Polar

Rectangular

Trigonometric

Exponential

Correct!

Wrong!

For greater accuracy, the value of phase angle θ should be determined from

Cos θ

Tan θ

Sin θ

Sec θ

Correct!

Wrong!

If one resistance in a series connection is open, then

The current is zero in all the other resistances

The current is maximum in all the other resistances

The voltage is zero across the open resistance

The voltage is infinite across the open resistance

Correct!

Wrong!

Which of the following has negative temperature coefficient?

Carbon

Nickel

Brass

Constantan

Correct!

Wrong!

For a carbon composition resistor, typical resistance values range from

2.7 Ω to 22 MΩ

1000 Ω to 10000 Ω

10 Ω to 10 MΩ

2.7 Ω to 2.7 GΩ

Correct!

Wrong!

The mutual inductance between two coils is ________ the reluctance of magnetic path.

Directly proportional to

Inversely proportional to

Independent to

Equal to

Correct!

Wrong!

When the power factor of a circuit is zero,

Power absorbed is maximum

Power absorbed is minimum

Power absorbed is zero

The impedance is minimum

Correct!

Wrong!

Which of the following does not generally affect the value of a capacitor?

The dielectric material used

The surface area of the plates

The thickness of the dielectric

The voltage applied to the plate

Correct!

Wrong!

If a multi-plate capacitor has 10 plates, each of area 10 cm^{2}, then

10 capacitors will be in parallel

10 capacitors will be in series

9 capacitors will be in parallel

9 capacitors will be in series

Correct!

Wrong!

In an ac circuit, the power dissipated as heat depends on

Impedance

Capacitive reactance

Resistance

Inductive reactance

Correct!

Wrong!

Which of the following is a disadvantage of a wire-wound resistor?

It has reactance in radio-frequency circuits

It cannot handle much power

It draws a large amount of current

It cannot handle high voltage

Correct!

Wrong!

The presence of an electric current is made known by

Electric shock

Effects produced

Magnetic shock

Flashing

Correct!

Wrong!

What is the rms value of a square wave?

Equals its peak value

Equals its peak-to-peak value

Peak divided by square root of two

Peak divided by pi

Correct!

Wrong!

The power factor of a certain circuit in which the voltage lags behind the current is 80%. To increase the power to 100%, it is necessary to add ________ to the circuit.

Inductance

Capacitance

Resistance

Impedance

Correct!

Wrong!

In a multiple capacitor, the plate area is

Increased

The same

Decreased

Variable

Correct!

Wrong!

An impedance given by 90∠-45˚ is a/an __________ impedance.