Welcome to ECE Board Exam Practice Quiz for Electrical Circuit. This set of practice quiz 3 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.

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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.

In an ac circuit with a resistive branch and an inductive branch in parallel, the

Voltage across the inductance leads the voltage across the resistance by 90°

Resistive branch current is 90° out of phase with the inductive branch current

Resistive and inductive branch currents have the same phase

Resistive and inductive branch currents are 180° out-of-phase

Correct!

Wrong!

At parallel resonance, the currents flowing through L and C are

Infinite

Zero

Unequal

Equal

Correct!

Wrong!

What is the resonant frequency of a circuit when L of 25 microhenrys and C of 10 picofarads are in parallel?

10.1 kHz

10.1 MHz

101 MHz

101 kHz

Correct!

Wrong!

Permeability is otherwise known as

Magnetic conductivity

Magnetic susceptibility

Electric conductivity

Electric susceptibility

Correct!

Wrong!

Which of the following is not a factor affecting dielectric strength?

Mass

Moisture content

Temperature

Thickness

Correct!

Wrong!

Which component opposes voltage change?

Resistor

Inductor

Capacitor

Transistor

Correct!

Wrong!

In an inductive coil, the rate of rise of current is maximum

Near the final maximum value of current

At mid-value of current

At half-power points

After one time constant

Correct!

Wrong!

The ohmic value of a resistor with negative temperature coefficient

Increases with increasing temperature

Increase with decreasing temperature

Stays unchanged with temperature change

Stays unaffected even with increasing temperature

Correct!

Wrong!

Leakage resistance in a capacitor results into

Internal heating

Internal bleeding

Shorter useful life

Short-circuiting

Correct!

Wrong!

A trigger circuit consisting of a capacitor of 0.01 μF is connected in series with a resistor. If the circuit requires 100 Vdc to operate, determine the value of the resistor when time constant is 0.009 s.

900 Ω

900 kΩ

900 MΩ

900 GΩ

Correct!

Wrong!

In an RL series circuit,

Current lags voltage by less than 90˚

Current lags voltage by 180˚

Current lags voltage by 90˚

Current leads voltage by 90˚

Correct!

Wrong!

Loop currents should be assumed to flow in which direction

Straight

Clockwise

Counter-clockwise

Either Clockwise or Counter-clockwise

Correct!

Wrong!

The reason why electrical appliances are connected in parallel.

It is a simple circuit

This makes the operation of appliances independent with each other

This results in reduced power consumption

All of these

Correct!

Wrong!

Which of the following is the most popular waveform?

Sinusoidal

Square wave

Triangular

Sawtooth

Correct!

Wrong!

A capacitance of 6 µµF means

6 pF

6 nF

6 fF

6 μF

Correct!

Wrong!

Which of the following elements is active?

Resistor

Inductor

Capacitor

Ideal voltage source

Correct!

Wrong!

The internal resistance of an ideal current source is

Infinite

Zero

Equal to the load resistance

To be determined

Correct!

Wrong!

An alloy composed of 84 % copper, 12 % manganese and 4 % nickel.

Manganin

Constantan

Nichrome

German silver wire

Correct!

Wrong!

Which of the following is not considered a physical factor affecting resistance?

Length

Material type

Temperature

Cross-sectional

Correct!

Wrong!

Effects of capacitance

It opposes any change in the amount of voltage

Voltage is lagged behind the current by a quarter cycle

Electric energy is stored in the capacitor in the form of electrostatic field

All of these

Correct!

Wrong!

An inductance of 1 mH is

0.001 H

0.01 H

0.0001 H

0.10 H

Correct!

Wrong!

The unit of elastance is

Farad

Daraf

Siemen

Henry

Correct!

Wrong!

The charge in the capacitor is stored at the

Terminals

Plates

Dielectric

Air

Correct!

Wrong!

For a series circuit, the higher the quality factor

The greater the bandwidth

The narrower the passband

The broader the resonance curve

The wider the passband

Correct!

Wrong!

What refers to such work at very low temperatures, near absolute zero?