Q261
Open questionFor which of the following substances, the resistance decreases with increase in temperature?
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Q262
Open questionThe S.I. unit of electric charge is :
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Q263
Open questionIndicate the false statement about the resistance of a wire
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Q264
Open questionThe magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
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Q265
Open questionWhat is the SI unit of electric current?
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Q266
Open questionThe rate of flow of electric charge is measured in
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Q267
Open questionA device which is used to limit the current in an electrical circuit is called a
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Q268
Open questionMaterials that allow electricity to flow are called
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Q269
Open questionThe fundamental scientific principle in the operation of battery is
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Q270
Open questionIf the current flowing through a circuit is 0.6 A for 6 mins, the amount of electric charge flowing through it is ________
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Q271
Open questionOhm's law is valid in case of
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Q272
Open questionElectrical burns occur principally because of
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Q273
Open questionThe SI unit of resistance is:
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Q274
Open questionElectrical Energy is the energy of
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Q275
Open questionAs water is cooled from 4 deg C to 0 deg C, its density
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Q276
Open questionFish and other aquatic creatures can live inside a deep frozen pond because
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Q277
Open questionThe density of a gas is maximum at
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Q278
Open questionLakes freeze in cold countries in winter, leaving the water underneath at
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Q279
Open questionA bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated, it will
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Q280
Open questionThermal expansion of materials arises from
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