Electrical Circuit Practice Quiz 07

Electrical Circuit Practice Quiz 07

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.

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!

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!

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!

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!

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!

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!

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!

The temperature-resistance coefficient of pure gold is
0.0034
0.0037
0.0038
0.0039

Correct!

Wrong!

What is the most common non-sinusoidal waveform?
Square wave
Triangular wave
Trapezoidal wave
Sawtooth wave

Correct!

Wrong!

Metal tin becomes superconductor at approximately
6K
3.7K
5K
4.7K

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!

What refers to the lowest voltage across any insulator that can cause current flow?
Conduction voltage
Critical voltage
Breakdown voltage
Voltage capacity

Correct!

Wrong!

What is the specific resistance of a pure silicon?
55 Ω-mm
55 Ω-m
55 Ω-cm
55 kΩ-m

Correct!

Wrong!

A series RL circuit has R of 10 Ω and XL 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!

A capacitor is used to
Block dc current
Pass dc current
Open voltage source
Short the voltage source

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!

The charging of a capacitor through a resistance obeys
Exponential law
Logarithmic law
Linear law
Square law

Correct!

Wrong!

For a parallel AC circuit, ______ is used as a reference phasor.
Voltage
Power
Current
Resistance

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!

With double the number of turns by the same length and area, the inductance is
The same
Doubled
Quartered
Quadrupled

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!

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!

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!

A 5 μF capacitor charge to 5V has a stored charge equal to
1 μc
5 μc
25 μC
200 μc

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!

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Electrical Circuit – Quiz 07

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