Which one of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torchlights, electric shavers, etc?
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Optical fibre works on the principle of
Optical fibre works on the principle of
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Who among the following anticipated Newton by declaring that all things gravitate to the earth
Who among the following anticipated Newton by declaring that all things gravitate to the earth ?
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Suppose a rocketship is receding from the earth at a speed of 2/10th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth
Suppose a rocketship is receding from the earth at a speed of 2/10th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth?
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When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in
When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in
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Assertion (A): A diamond sparkles more than a glass imitation cut to the same shape. Reason (R): The refractive index of diamond is less than that of glass. In the context of the above two statements, which one of the following is correct
Assertion (A): A diamond sparkles more than a glass imitation cut to the same shape. Reason (R): The refractive index of diamond is less than that of glass. In the context of the above two statements, which one of the following is correct ?
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The normal temperature of human body on the Kelvin scale is
The normal temperature of human body on the Kelvin scale is
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A parachutist jumps from a height of 5000 metres. The relationship between his falling speed ‘v’ and the distance fallen through ‘d’ is best represented as
A parachutist jumps from a height of 5000 metres. The relationship between his falling speed ‘v’ and the distance fallen through ‘d’ is best represented as
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Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not
Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not?
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The chemical used as a ‘fixer’ in photography is
The chemical used as a ‘fixer’ in photography is