Current electricity

74. Which of the following statement is true?

A galvanometer with low resistance in parallel is a voltmeter
A galvanometer with high resistance in parallel is a voltmeter
A galvanometer with high resistance in series is an ammeter

Detailed SolutionWhich of the following statement is true?

75. A 3 ohm resistor having 2 A current will dissipate the power of

2 watts
4 watts
6 watts
8 watts

Detailed SolutionA 3 ohm

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resistor having 2 A current will dissipate the power of

76. Heat in a conductor is produced on the passage of electric current due to

reactance
capacitance
impedance
resistance

Detailed

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SolutionHeat in a conductor is produced on the passage of electric current due to

77. Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be

9 times
$$ rac{1}{9}$$ times
$$ rac{1}{3}$$ times
3 times

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href="https://exam.pscnotes.com/mcq/three-identical-resistors-are-first-connected-in-parallel-and-then-in-series-the-resultant-resistance-of-the-first-combination-to-the-second-will-be/#more-44637">Detailed SolutionThree identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be

78. The S.I. unit of power is

Henry
Coulomb
Watt
Watt-hour

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href="https://exam.pscnotes.com/mcq/the-s-i-unit-of-power-is/#more-44502">Detailed SolutionThe S.I. unit of power is

79. All good conductors have high

Conductance
Resistance
Reluctance
Thermal conductivity

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class="read-more button" href="https://exam.pscnotes.com/mcq/all-good-conductors-have-high/#more-44473">Detailed SolutionAll good conductors have high

80. Which of the following statement is correct?

A semiconductor is a material whose conductivity is same as between that of a conductor and an insulator
A semiconductor is a material which has conductivity having average value of conductivity of metal and insulator
A semiconductor is a material made of alternate layers of conducting material and insulator

Detailed SolutionWhich of the following statement is correct?

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