Q. Why we should wear light coloured cloths during summer?
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Q. The angle between the ________ and the incident ray is called the angle of incidence.
Q. For photoelectric effect to take place, the metal used as the cathode should have ________
Q. While ascending a hill, the driver of the vehicle keeps the gear ratio
Q. The angular momentum of a satellite depends on which of the following?
Q. The function of ball bearings in a wheel is :
Q. Which of the following devices can be used to detect radiant heat?
Q. What type of system did Paul Nipkow, John Baird, and Charles Jenkins all invent?
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