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120 Important Basic Electrical MCQ Question and Answer | PDF Free Download

Basic Electrical MCQ Question and Answer | PDF Free Download
Electrical Engineering MCQ Question & Answer in PDF Download

1.Voltage dependent resistors are used

  • AFor inductive circuits
  • BTo suppress surges
  • CAs heating elements
  • DAs current stabilizers
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Correct Answer : (B)

To suppress surges
Explanation:

Voltage dependent resistors are used to suppress surges.

2.With three resistances connected in parallel, if each dissipates  20 W  the total power supplied by the voltage source equals

  • A10 W
  • B20 W
  • C40 W
  • D60 W
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Correct Answer : (D)

60 W
Explanation:

3.A thermistor has

  • APositive temperature coefficient of resistance
  • BNegative temperature coefficient of resistance
  • CZero temperature coefficient of resistance
  • DVariable temperature coefficient of resistance
Answer / Hint Save Question Comment On Question
Correct Answer : (B)

Negative temperature coefficient of resistance
Explanation:

4.Nichrome wire is an alloy of

  • ALead and zinc
  • BAnd vanadium
  • CNickel and chromium
  • DCopper and silver
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Correct Answer : (C)

Nickel and chromium
Explanation:

Nichrome wire is an alloy of Nickel and chromium.

  • Nichrome has a high melting point of about 1,400 ?C (2,550 ?F), and has an electrical resistivity of around 112 microOhm-cm, which is around 66 times higher resistivity than copper of 1.678 microOhm-cm.
  • It is used in heating elements such as hair dryers, heat guns and Ovens.
  • Nichrome is used to make the coils used in water heaters.
  • Nichrome is used in the explosives and fireworks industry as a bridgewire in electric ignition systems, such as electric matches and model rocket igniters.

5.Which of the following can have negative temperature coefficient?

  • ACompounds of silver
  • BLiquid metals
  • CMetallic alloys
  • DElectrolytes
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Correct Answer : (D)

Electrolytes
Explanation:

Electrolytes have negative temperature coefficient.

6.Conductance: mho :: 

  • AResistance : ohm
  • BCapacitance : henry
  • CInductance : farad
  • DLumen : steradian
Answer / Hint Save Question
Correct Answer : (A)

Resistance : ohm
Explanation:
Electrical Engineering MCQ Question & Answer in PDF Download

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