Welcome to ECE Board Exam Practice Quiz for Electrical Circuit. This set of practice quiz 7 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.

Comment us your thoughts, scores, ratings, and questions about the quiz in the comments section below!

Choose the letter of the best answer in each questions.

For multi-plate capacitor, capacitance is proportional to

Number of plates less one (n – 1)

Number of plates plus one (n + 1)

Number of plates less two (n – 2)

Number of plates (n)

Correct!

Wrong!

How many coulombs are delivered by a storage battery in 25 hours if it is supplying current at the rate of 3 A?

2.592 x 10^5 C

2.592 x 10^3 C

2.592 x 10^8 C

2.592 x 10^12 C

Correct!

Wrong!

Metal tin becomes superconductor at approximately

6K

3.7K

5K

4.7K

Correct!

Wrong!

The charging of a capacitor through a resistance obeys

Exponential law

Logarithmic law

Linear law

Square law

Correct!

Wrong!

If two resistances of 9 Ω and 6 Ω are connected in parallel, the total resistance is

54 Ω

0.3 Ω

15 Ω

3.6 Ω

Correct!

Wrong!

A three-by-three, series-parallel matrix of resistors, all having the same ohmic value, would have a net resistance of

One-third the value of a single resistor

Three times the value of a single resistor

The same value as a single resistor

Nine times the value of a single resistor

Correct!

Wrong!

When two in-phase sine waves that have identical frequency and amplitude are added together, then the result is a sine wave with _______ the amplitude of either.

Half

Twice

Four times

One-fourth

Correct!

Wrong!

What is the resonant frequency of a circuit when L of 3 microhenrys and C of 40 picofarads are in series?

14.5 kHz

145 MHz

14.5 MHz

145 kHz

Correct!

Wrong!

What refers to the lowest voltage across any insulator that can cause current flow?

Conduction voltage

Critical voltage

Breakdown voltage

Voltage capacity

Correct!

Wrong!

If a certain circuit has a current that is lagging the voltage by 45˚, then it displays

Pure inductive reactance

Resistance and capacitance reactance

Resistance and inductive reactance

Pure capacitive reactance

Correct!

Wrong!

What is the most common non-sinusoidal waveform?

Square wave

Triangular wave

Trapezoidal wave

Sawtooth wave

Correct!

Wrong!

If the output resistance of a voltage source is 4 Ω, it internal resistance should be

4 Ω

8 Ω

2 Ω

Infinite

Correct!

Wrong!

For a parallel AC circuit, ______ is used as a reference phasor.

Voltage

Power

Current

Resistance

Correct!

Wrong!

A capacitor is used to

Block dc current

Pass dc current

Open voltage source

Short the voltage source

Correct!

Wrong!

With double the number of turns by the same length and area, the inductance is

The same

Doubled

Quartered

Quadrupled

Correct!

Wrong!

What is expected when two 20 kΩ, 1 watt resistor in parallel are use instead of one 10 kΩ, 1 watt?

Provides higher current

Provides less power

Provides more power

Provides wider tolerance

Correct!

Wrong!

A series R_{L} circuit has R of 10 Ω and X_{L} of 5 Ω, its impedance in rectangular form is given by

10 + j5 Ω

10 + j10 Ω

10 – j5 Ω

10 – j10 Ω

Correct!

Wrong!

When the net reactance in a series coil-capacitor circuit is zero at frequency f, the nature of its reactance of frequency 2f is

Inductive

Capacitive

Resistive

Infinite

Correct!

Wrong!

Tungsten filament of bulbs has a hot resistance higher than its cold resistance due to its temperature coefficient which is

Positive

Negative

Zero

Infinite

Correct!

Wrong!

What is the value of a carbon composition resistor with the following color code: Brown, white, orange, red

190 Ω; 10%

19 kΩ; 2%

19 kΩ; 20%

1.9 kΩ; 2%

Correct!

Wrong!

The temperature-resistance coefficient of pure gold is

0.0034

0.0037

0.0038

0.0039

Correct!

Wrong!

What is the total effective capacitance of two 0.25 μF capacitors connected in series?

0.125 μF

1.25 μF

0.50 μF

2.5 μF

Correct!

Wrong!

A 5 μF capacitor charge to 5V has a stored charge equal to

1 μc

5 μc

25 μC

200 μc

Correct!

Wrong!

The second strip of an electronic resistor color-code represents

The multiplier

The second digit of the value

The temperature

The tolerance

Correct!

Wrong!

What is the specific resistance of a pure silicon?