Q161
Open questionIn a railway track, two rails are joined end to end with a gap in between them because
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Q162
Open questionAir coolers are more suitable for
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Q163
Open questionWe feel cool when we sit near the fan, this is because
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Q164
Open questionWhen hot-water is sprinkled on a hotter glass tumbler, it breaks because
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Q165
Open questionA gap is left between two rails of a railway track to accommodate...... of the metal.
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Q166
Open questionWhich of the following is arranged in order of decreasing conductivity?
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Q167
Open questionEvery hot object emits ________
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Q168
Open questionWhich metal is the best conductor of heat?
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Q169
Open questionWhen hot liquid is poured into a thick glass tumbler, it cracks because glass :
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Q170
Open questionMud houses are cooler in summers and warmer in winters as compared to brick houses because
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Q171
Open questionDuring hot weather, the fan produces a feeling of comfort. This is because
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Q172
Open questionThe flow of thermal energy is called
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Q173
Open questionOn a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because :
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Q174
Open questionWhich of the following is an insulator?
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Q175
Open question'Therm' is the unit of
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Q176
Open questionHeat flows as a result of difference of ________
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Q177
Open questionLight beam which is highly directional is called:
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Q178
Open questionSpeed of light is maximum in ________
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Q179
Open questionLight travels in a straight line (rectilinear propagation of light). This statement does hold if the medium of travel for light is
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Q180
Open questionThe speed of light will be minimum while passing through
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