Q. A planet is moving around the sun in an elliptical orbit. Its speed is
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Q. Fleming's right hand rule is used to find the direction of the
Q. Conversion of heat into electrical energy is achieved by using :
Q. Ocean currents are an example of
Q. Who among the following developed the technology of underground nuclear explosion ?
Q. Which of the following was the first theory of superconductivity?
Q. The velocity of sound in a gas depends on
Q. A doppler effect occurs when a source of sound moves
Q. The wavelength of a wave is the distance between
Q. When a running car stops suddenly, the passengers tends to lean forward because of:
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