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Electrical JE MCQs (UPPCl JE, SSC JE, PGCIL DIPLOMA TRAINEE,UPMRC JE, NHPC JE )

Electrical JE MCQs (UPPCl JE, SSC JE, PGCIL DIPLOMA TRAINEE,UPMRC JE, NHPC JE )

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Which of the following materials has the least resistivity ?
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Which of the following materials has the least resistivity ? Zinc Lead Mercury Copper ✅

ln the case of direct current ?
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ln the case of direct current ? magnitude and direction of current remains constant ✅ magnitude and direction of current changes with time magnitude of current changes with time magnitude of current remains constant

The hot resistance of the bulb's filament is higher than its cold resistance because the temperature co-efficient of the filament is ?
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The hot resistance of the bulb's filament is higher than its cold resistance because the temperature co-efficient of the filament is ? zero negative positive ✅ about 2 ohms per degree

For which of the following ampere second could be the unit ?
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For which of the following ampere second could be the unit ? Reluctance Charge ✅ Power Energy

An instrument which detects electric current is known as ?
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An instrument which detects electric current is known as ? voltmeter rheostat wattmeter galvanometer ✅

A thermistor has ? positive temperature coefficient negative temperature coefficient ✅ zero temperature coefficient variable temperature coefficient

Three resistances of 10 ohms, 15 ohms and 30 ohms are connected in parallel. The total resistance of the combination is ?
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Three resistances of 10 ohms, 15 ohms and 30 ohms are connected in parallel. The total resistance of the combination is ? 5 ohms✅ 10 ohms 15 ohms 65 ohms

Ohm's law is not applicable to ?
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Ohm's law is not applicable to ? vacuum tubes ✅ carbon resistors high voltage circuits circuits with low current densities

If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes ?
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If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes ? 0.4 ohm ✅ 0.6 ohm 0.8 ohm 1.0 ohm

With rise in temperature the resistance of semi-conductors ?
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The ratio of mass of proton to that of electron is nearly ?
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