Welcome to ECE Board Exam Practice Quiz for Electrical Circuit. This set of practice quiz 6 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.

The internal resistance of an ideal voltage source is

Infinite

Equal to the load resistance

Zero

To be determined

Correct!

Wrong!

An inductive circuit of resistance 16.5 Ω and inductance of 0.14 H takes a current of 25 A. if the frequency is 50 Hz, find the supply voltage.

1501 V

1174 V

1877 V

991 V

Correct!

Wrong!

In a series circuit with unequal resistances the

Highest R has the highest V

Lowest R has the highest V

Lowest R has the highest I

Highest R has the highest I

Correct!

Wrong!

The Q-factor of a parallel resonant circuit is also known as

Current magnification factor

Voltage magnification factor

Load factor

Leakage factor

Correct!

Wrong!

An open resistor when checked with an ohmmeter reads

Zero

Infinite

High but within the tolerance

Low but not zero

Correct!

Wrong!

A capacitor opposes change in

Voltage

Current

Voltage and current

Neither voltage nor current

Correct!

Wrong!

A rheostat is a form of

Variable resistor

Variable capacitor

Potentiometer

Thermocouple

Correct!

Wrong!

The ratio of the flux density to the electric field intensity in the dielectric is called

Permittivity

Field intensity

Permeability

Elasticity

Correct!

Wrong!

What value of R is needed with a 0.05 μF C for an RC time constant of 0.02 s?

400 Ω

400 MΩ

400 GΩ

400 kΩ

Correct!

Wrong!

Series resonant circuit is sometimes known as

Rejector circuit

Acceptor circuit

Inductive circuit

Capacitive circuit

Correct!

Wrong!

A series-parallel combination of identical resistors will

Increase the power rating compared with one resistor alone

Increase the voltage rating compared with one resistor alone

Reduce the voltage rating compared with resistor alone

Result in an expensive circuit

Correct!

Wrong!

Which of the following describes the action of a capacitor?

Stores electrical energy

Opposes changes in current flow

Creates a dc resistance

Converts ac to dc

Correct!

Wrong!

Which statement is true about a passive circuit?

A circuit with neither a source of current nor a source of potential difference

A circuit with a voltage source

A circuit with a current source

A circuit with only resistance as a load

Correct!

Wrong!

For parallel capacitors, total charge is

The sum of individual charges

Equal to the charge of either capacitors

Equal to the product of the charges

The quotient of the charges

Correct!

Wrong!

Electric energy refers to

Volt divided by coulomb

Volt-ampere

Volt-coulomb

Watt divided by time

Correct!

Wrong!

Which of the following dielectric materials makes the highest-capacitance capacitor?

Air

Barium-strontium titanite

Mica

Electrolyte

Correct!

Wrong!

The ratio of maximum value to the effective value of an alternating quantity is called

Form factor

Peak factor

Dynamic factor

Leakage factor

Correct!

Wrong!

The reason why alternating current can induce voltage is

It has high peak value

It has a stronger magnetic field than direct current

It has a constant magnetic field

It has a varying magnetic field

Correct!

Wrong!

The admittance of a parallel RLC circuit is found to be the ______ sum of conductance and susceptances.

Algebraic

Arithmetic

Vector

Phasor

Correct!

Wrong!

Which of the following is not a factor affecting capacitance of a basic capacitor?

Area of plates

Number of plates

Distance between plates

Dielectric material used

Correct!

Wrong!

A real current source has

Infinite internal resistance

Zero internal resistance

Large internal resistance

Small internal resistance

Correct!

Wrong!

If an emf in circuit A produces a current in circuit B, then the same emf in circuit B produces the same current in circuit A. this theorem is known as

Maximum power transfer theorem

Millman’s theorem

Reciprocity theorem

Norton’s theorem

Correct!

Wrong!

When two pure sine waves of the same frequency and the same amplitude which are exactly 180˚ out-of-phase are added together, the result is