Electronic Principles MCQs
Electronic Principles MCQs
The following Electronic Principles MCQs have been compiled by our experts through research, in order to test your knowledge of the subject of Electronic Principles. We encourage you to answer these 20 multiple-choice questions to assess your proficiency.
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1: The total impedance of a series RLC circuit:
A. Is minimum at the resonant frequency
B. Always increases as the applied frequency increases
C. Always decreases as the applied frequency increases
D. Is maximum at the resonant frequency
2: The direction of electron current flow is:
A. From negative to positive
B. From neutral to positive
C. From positive to negative
D. From right to left
3: The Thevenin resistance is equal in value to the
A. Half the load resistance
B. Load resistance
C. Open-load resistance
D. Internal resistance of a Morton circuit
4: Which one of the following phrases most accurately describes the nature of a pulsating dc voltage?
A. The voltage causes current to flow in two directions at the same time
B. The voltage reverses polarity periodically
C. The voltage remains at one polarity and at a steady level
D. The voltage remains at one polarity but changes value periodically
5: What is the smallest number of polarities required for current flow?
A. Three - negative, positive and neutral terminals
B. Four - two negative and two positive
C. One - a negative terminal
D. Two - a negative terminal and a positive terminal
6: One henry of inductance is defined as:
A. The amount of counter emf required to reduce a current to 1 A
B. The number of turns of wire in an inductor multiplied by the amount of current flowing through it
C. The amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
D. The amount of inductance required to change the frequency of a current by 1 Hz
7: When a parallel RLC circuit is operating at its resonant frequency:
A. The difference between inductive and capacitive reactance is equal to the resistance
B. Capacitive reactance is greater than the inductive reactance
C. Inductive reactance is greater than the capacitive reactance
D. Inductive reactance is equal to the capacitive reactance
8: Which one of the following devices is most often used for measuring electrical potential difference?
A. Wattmeter
B. Ohmmeter
C. Ammeter
D. Voltmeter
9: The value of a capacitor can be made larger by:
A. Increasing the area of the plates
B. Increasing the frequency of the applied voltage
C. Decreasing the area of the plates
D. Increasing the voltage applied to the plates
10: A device that converts mechanical pressure to electrical energy is called
A. Piezoelectric device
B. Photodiode
C. Nicad cell
D. Solar cell
11: Voltage is
A. The number of free electrons in an atom
B. The smallest electrically charged particle
C. Trie force that causes electrons to flow
D. The flow of charged particles through a material
12: In a step-down transformer, which is larger?
A. Neither
B. Impossible to say
C. Primary voltage
D. Secondary voltage
13: The equivalent of 1 megohms is:
A. One million ohms
B. 100,000 ohm
C. One-millionth of an ohm
D. 1 k Ohm
14: The merging of a free electron and a hole is called
A. Recombination
B. Thermal energy
C. Lifetime
D. Covalent bonding
15: A basic capacitor is composed of:
A. Two coils separated by a conductor
B. Two conductors separated by a dielectric
C. Two dielectrics separated by a conductor
D. Two coils separated by a dielectric
16: Electron current is flowing through a conductor in a direction you might describe as straight into this page. What is the direction of the resulting magnetic field?
A. Into this page
B. Out of this page
C. Clockwise
D. Counterclockwise
17: The Norton current is sometimes called the
A. Thevenin voltage
B. Open-load current
C. Shorted-load current
D. Thevenin current
18: At room temperature a conductor has low many holes?
A. Same number as free electrons
B. Only those produced by thermal energy
C. Many
D. Less than the free electrons
19: Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?
A. E = PR
B. E = I2R
C. I = ER
D. I = E/R
20: A resistor has a rated value of 100 ohm and a tolerance of 10%. What is its minimum and maximum allowable resistance value?
A. 98 Ohm - 100.1 ohm
B. 99 Ohm - 102 ohm
C. 90 Ohm - 110 ohm
D. 90 Ohm - 101 ohm
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