Q. In a cup, tea cools from 90C to 80C in exactly one minute. It will cool from 70C to 60C in
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Q. Who was the first scientist to discover Electrons?
Q. Hertz is a unit for measuring
Q. The apparent weight of a man in a lift is less the real weight when :
Q. Which tube used to produce X-ray?
Q. A star appears twinkling in the sky because of
Q. The damage of the human body due to radiation (X-rays or gamma rays etc) is measured in :
Q. The maximum allowable voltage between adjacent segment is ?
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