basic electrical MCQs – Page 2

Practise focused basic electrical questions with marked answers for exam preparation and subject revision.

basic electrical Mcqs
21. Which of the following has no units?
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A. Moment of a magnet

B. Magnetic susceptibility

C. ermittivity

D. Permeability

22. In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is
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A. 80 V

B. 132 V

C. 66 v

D. 33 V

23. Magnetic flux has the unit of
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A. Weber

B. Newton

C. Tesla

D. Ampere-turn

24. Which of the followings is/are active element?
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A. Current source

B. None of these.

C. Voltage source

D. Both
25. You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect__________?
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A. two in parallel

B. three in series

C. two in parallel and one in series

D. three in parallel

26. The minimum charge on an ion is______________?
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A. equal to the charge of an electron

B. equal to the atomic number of the atom

C. equal to the charge of the number of electrons in an atom (#) zero

27. Which of the following materials has a negative temperature co-efficient of resistance?
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A. Brass

B. Carbon

C. Aluminum

D. Copper

28. Varistors are______________?
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A. resistors with zero temperature coefficient

B. carbon resistors

C. non-linear resistors

D. insulators

29. A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is_____________?
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A. 4.6 A, 6.9 A

B. 6.4 A, 6.9 A

C. 4.6 A, 9.6 A

D. 6.4 A, 9.6 A
30. Electric pressure is also called________?
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A. power

B. energy

C. voltage

D. resistance

31. Which of the following statement is true both for a series and a parallel D. C. circuit?
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A. Currents are additive

B. Power are additive

C. Elements have individual currents

D. Voltages are additive

32. Conductance is reciprocal of____________?
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A. reluctance

B. resistance

C. inductance

D. capacitance

33. Inductor does not allow the sudden change of
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A. voltage

B. current

C. power

D. None of the above

34. The hot resistance of the bulbs filament is higher than its cold resistance because the temperature co-efficient of the filament is___________________?
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A. positive

B. about 2 ohms per degree

C. zero

D. negative

35. The rating of a fuse wire is always expressed in________________?
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A. kWh

B. ampere-hours

C. amperes

D. ampere-volts

36. The resistivity of the conductor depends on
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A. type of material.

B. length of the conductor.

C. area of the conductor.

D. none of these.

37. Which of the following material has nearly zero temperature co-efficient of resistance_________?
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A. Carbon

B. Copper

C. Porcelain

D. Manganin
38. A resistance having rating 10 ohms, 10 W is likely to be a__________?
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A. variable resistor

B. wire wound resistor

C. metallic resistor

D. carbon resistor

39. All of the following are equivalent to watt except_____________?
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A. joules/seC.

B. amperes x volts

C. amperes/volt

D. (amperes) ohm

40. Which of the following statement is true________________?
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A. A galvanometer with low resistance in series is an ammeter

B. A galvanometer with high resistance in series is an ammeter

C. A galvanometer with low resistance in parallel is a voltmeter

D. A galvanometer with high resistance in parallel is a voltmeter