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Q. The device used to change the speed of an electric fan is
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Q. Which of the following instrument will be used to measure alternating current?
Q. Which of the following of these waves can be polarized -
Q. Why are Polaroids used in sunglasses ?
Q. Which one of the following is an ohmic conductor?
Q. Which of the following liquids has the lowest density?
Q. Ohm's law is valid in case of
Q. Anemometer is an instrument meant for measuring ________
Q. The material that can be permanently deformed by heat and pressure is called a
Q. Heat energy is transferred by conduction whenever molecules
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