MCQs: Which method can be used for absolute measurement of resistances _______________?
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MCQs: Ohm’s law is not applicable to__________?
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MCQs: Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be_____________?
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MCQs: A nichrome wire used as a heater coil has the resistance of 2 £2/m. For a heater of 1 kW at 200 V, the length of wire required will be_____________?
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MCQs: Temperature co-efficient of resistance is expressed in terms of___________?
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MCQs: When current flows through heater coil it glows but supply wiring does not glow because______________?
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MCQs: The condition for the validity under Ohm’s law is that_______________?
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MCQs: Which of the following statement is correct_______________?
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MCQs: A rheostat differs from potentiometer in the respect that it_____________?
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MCQs: An open resistor, when checked with an ohm-meter reads_____________?
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MCQs: are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators______________?
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MCQs: All good conductors have high____________?
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MCQs: Voltage dependent resistors are usually made from________________?
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MCQs: Voltage dependent resistors are used_____________?
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MCQs: The ratio of mass of proton to that of electron is nearly_____________?
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MCQs: The number of electrons in the outer most orbit of carbon atom is___________?
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MCQs: With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals_____________?
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MCQs: A thermistor has_____________?
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MCQs: If/, R and t are the current, resistance and time respectively, then according to Joule’s law heat produced will be proportional to_______________?
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MCQs: Nichrome wire is an alloy of_____________?
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