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Gamma Rays

Infrared wave...

Question

Infrared waves are used in microwaves to heat food by heating water present in the food

A

False

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B

True

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Solution

The correct option is B True

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Q. Assertion :Microwaves are heat waves which is used to heat up food in ovens. Reason: In ovens, microwaves heat up the vessel first and food inside gets heated up by the transfer of energy from the vessel.

Q. Why are infra-red radiations referred to as heat waves? Name the radiations which are next to these radiations in the electromagnetic spectrum having (i) shorter wavelength (ii) longer wavelength. (b) State the conditions under which a microwave oven heats up a food item containing water molecules.

Q. Find out how friction heat up food in microwave ovens?

Why does microwave oven heat up a food item containing water molecules most efficiently?

Q. Q-Which type of heat transfer takes place in cooking food in a microwave?

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