Welcome to ECE Board Exam Practice Quiz for Electrical Circuit. This set of practice quiz 1 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.

A gang capacitor is a variable capacitor in which capacitance is varied by changing the

Dielectric

Number of plates

Plate area

Distance between plates

Correct!

Wrong!

The ratio of W/VA in an ac circuit means

Power factor

Reactive factor

Quality factor

Load factor

Correct!

Wrong!

A series RLC circuit has a __________ power factor at its half-power points

Unity

Leading

Lagging

Either Leading or Lagging

Correct!

Wrong!

In liquids and gases, ionization current results from a flow of

Positive or negative ions

Free electrons

Ions that are lighter in weight than electrons

Protons

Correct!

Wrong!

If two equal resistances connected in series across a certain supply are now connected in parallel across the same supply, the power produced will be _________ that of series connection.

One-half

One-fourth

Two times

Four times

Correct!

Wrong!

A series RLC circuit consists of a 10 Ω resistor in series with L = 10 μH, and C = 100 μF. Determine a new value of I, for which the resonant frequency is one-half the original value.

40 μH

40 mH

40 pH

40 nH

Correct!

Wrong!

Transient period is considered over after

5

1

100

6

Correct!

Wrong!

If a capacitor is rated for 200V dc, what is its effective ac working voltage?

50 V

100 V

200 V

400 V

Correct!

Wrong!

The value of temperature coefficient (α) is dependent upon

The nature of material and temperature

The length of material

The cross-sectional area of the material

The volume of the material

Correct!

Wrong!

Conventional flow assumes charges flow from

Positive to negative

Positive to positive

Negative to positive

Negative to negative

Correct!

Wrong!

Which statement is true?

A series resonant circuit is of high impedance

A parallel resonant circuit is of low impedance

A series resonant circuit is inductive if it operates at a frequency higher than the resonant frequency

A parallel resonant circuit is inductive if it operates at a frequency higher than the resonant frequency

Correct!

Wrong!

What is the half-power bandwidth of a parallel resonant circuit which has a resonant frequency of 3.6 MHz and Q of 218?

1.65 kHz

16.5 MHz

16.5 kHz

165 kHz

Correct!

Wrong!

Resistor with colored bands in the body

Wire-wound resistor

Carbon-composition resistor

Potentiometer

Rheostat

Correct!

Wrong!

Two capacitors of capacitance 9 μF and 18 μF in series will have a total capacitance of

27 μF

162 μF

6 μF

180 μF

Correct!

Wrong!

An ac series circuit is composed of a resistance of 20 Ω, inductive reactance of 40 Ω, and a capacitive reactance of 15 Ω. If a current of 1 ampere is flowing, what is the applied voltage

320 V

32 V

220 V

22 V

Correct!

Wrong!

At what frequency will an inductor of 5mH have the same reactance as a capacitor of 0.1 μF?

7.12 kHz

7.12 Hz

7.12 MHz

7.12 GHz

Correct!

Wrong!

What capacitance exists not through design but simply because two conducting surfaces are relatively close to each other?

Surge

Stray

Natural

Normal

Correct!

Wrong!

A tank circuit is a

Parallel LC circuit

Series LC circuit

A resonant circuit

A non-resonant circuit

Correct!

Wrong!

What is the other name of relative permittivity?

Dielectric strength

Potential gradient

Breakdown voltage

Specific inductance capacity

Correct!

Wrong!

What is the temperature coefficient of the resistance Eureka?

Infinity

Negative

Almost zero

Positive

Correct!

Wrong!

An open inductor has

Zero resistance and infinite inductance

Infinite resistance and zero inductance

Infinite resistance and infinite inductance

Zero resistance and zero inductance

Correct!

Wrong!

Series resonance occurs when

XL = XC

XL = R

Z = R

Both XL = XC and Z = R

Correct!

Wrong!

If three 9 mH inductors are connected in parallel without mutual inductance then the total inductance is

3 mH

9 mH

27 mH

18 mH

Correct!

Wrong!

Which is considered as the effect of a dielectric material?

Increasing capacitance

Decreasing capacitance

Reducing the working voltage

Increasing the distance between the plates

Correct!

Wrong!

Which of the following conditions is not true for a series RLC circuit at resonance?