Emerging Trends in Electrical Engineering MCQ. We covered all the Emerging Trends in Electrical Engineering MCQ in this post for free so that you can practice well for the exam.
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MCQ on Electrical Engineering Emerging Technologies for Students
When two or more cells are connected to each other by opposite terminals, then it is called as …….
(a) electric bulb
(b) switch
(c) battery
(d) electric current
Option c – battery
Which of the following instruments is used to measure electric current?
(a) Galvanometer
(b) Rheostat
(c) Voltmeter
(d) Ammeter
Option d – Ammeter
The …… is connected in parallel in an electric circuit.
(a) voltmeter
(b) fuse
(c) galvanometer
(d) ammeter
Option a – voltmeter
A Galvanometer can be converted into a voltmeter by connecting with it an
(a) high resistance in parallel.
(b) low resistance on parallel.
(c) high resistance on series.
(d) low resistance in series.
Option c – high resistance on series
The instrument used for detecting the presence of electric current in a circuit is
(a) refractometer
(b) Galvanometer
(c) Viscometer
(d) Diffractometer
Option b – Galvanometer
The potentiometer is superior to a voltmeter for measuring a potential difference because of
(a) the resistance of the voltmeter.
(b) the potentiometer does not draw any current from the source of the potential.
(c) The sensitivity of the potentiometer is better than that of the voltmeter.
(d) The voltmeter has a dial and is of small size.
Option b – the potentiometer does not draw any current from the source of the potential
……… states that the total current entering a junction is equal to the total current leaving the junction.
(a) Lenz’s Law
(b) Hooke’s Law
(c) Ohm’s Law
(d) Kirchhoff’s First Law
Option d – Kirchhoff’s First Law
“The sum of emf’s and potential differences around a closed loop equals zero” is a consequence of
(a) Ohm’s law
(b) Conservation of charge
(c) Conservation of momentum
(d) Conservation of energy
Option d – Conservation of energy
A given conductor carrying a current of 1 ampere. It produces an amount of heat equal to 2000 J. If the current through the conductor is doubled, then the amount of heat produced will be
(a) 2000 J
(b) 4000 J
(c) 8000 J
(d) 1000 J
Option c – 8000 J
A fuse is a
(a) a safety device that regulates the flow of current.
(b) made up of tin and lead alloy.
(c) has a low melting point.
(d) All of the above
Option d – All of the above
A fuse wire must be
(a) conducting and of low melting point.
(b) conducting and of high melting point.
(c) insulator and of high melting point.
(d) insulator and of low melting point.
Option a – conducting and of low melting point
A fuse wire is made of
(a) an alloy of tin and copper.
(b) an alloy of tin and lead.
(c) an alloy of tin and aluminum.
(d) an alloy of nickel and chromium.
Option b – an alloy of tin and lead
The fuse in an electric circuit is connected in
(a) series with neutral.
(b) parallel to live.
(c) parallel to neutral.
(d) series with live.
Option d – series with live
Inactive nitrogen and argon gases are usually used in electric bulbs in order to
(a) increase the intensity of light emitted.
(b) increase the life of the filament.
(c) make the emitted light-colored.
(d) make the production of bulbs economical.
Option b – increase the life of the filament
The filament in traditional incandescent bulbs is made up of which metal?
(a) Tungsten
(b) Copper
(c) Iron
(d) Platinum
Option a – Tungsten
Tungsten is used for the construction of filament in electric bulbs because of its
(a) high specific resistance
(b) low specific resistance
(d) high melting point
Option b – low specific resistance
The brightness of the bulb decreases gradually with its period of use because of
(a) the evaporation of metal from the filament of the bulb.
(b) decreases in the resistance of the bulb.
(c) decrease in electric supply to the bulb.
(d) None of the above
Option a – the evaporation of metal from the filament of the bulb
The property of electric current which is applicable in the fuse wire is
(a) the chemical effect of current.
(b) magnetic effect of current.
(c) heating effect of current.
(d) the optical property of current.
Option c – heating effect of current
The metal cap of an electric cell is generally the …… terminal of the electrical cell.
(a) negative
(b) positive
(c) neutral
(d) devoid
Option b – positive
Which of the given below devices converts chemical energy into electrical energy?
(a) Transformer
(b) Battery
(c) Electric generator
(d) Wheel
Option b – Battery
Electricity is produced through the dry cell from
(a) chemical energy
(b) thermal energy
(c) mechanical energy
(d) nuclear energy
Option a – chemical energy
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