Q561
Open questionA fresh egg when placed in salt water will
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Q562
Open questionBurns caused by steam are much severe than those caused by boiling water because
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Q563
Open questionWhich of the following has got more heat capacity ?
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Q564
Open questionWhich of the following produces more severe burns ?
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Q565
Open questionHeat stored in water vapour is
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Q566
Open questionWhich one of the following has the highest value of specific heat?
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Q567
Open questionWater is not suitable as a calorimetric substance because it :
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Q568
Open questionWater is used in car radiator because of its
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Q569
Open questionHow much mechanical work must be done to completely melt 1 gram of ice at 0°C ?
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Q570
Open questionWater pipes in hilly areas often burst on a cold frosty night, because
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Q571
Open questionWhich of the following represents a relation for ''heat lost = heat gained'?
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Q572
Open questionQ = mcdT refers to
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Q573
Open questionSteam at 100°C causes more severe burns than water at 100°C because
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Q574
Open questionNo current will flow between two charged bodies if they have the same
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Q575
Open questionTwo metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes
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Q576
Open questionFind the resistance (in mega) of a wire of length 20m, cross sectional area 1 cm2 and made of a material of resistivity 200m.
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Q577
Open questionA copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be
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Q578
Open questionWhich of the following is a good conductor of heat but a bad conductor of electricity ?
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Q579
Open questionWhen a number of resistors are connected in series in a circuit, the value of current:
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Q580
Open questionA good conductor while carrying current is
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