|Consider the following statements in the aspect of microwave oven.|
|1. Microwaves are generated in the oven by means of a magnetron.|
|2. Heating occurs inside the food, with warming the surrounding air.|
|3. Most type of glasses, papers etc absorb the microwaves and hence heated up.|
|4. A microwave oven cooks food using microwaves of megahertz frequency.|
|Which of the statements) given above is/are not correct?|
A) 1 and 4
B) 2 and 3
C) Only 3
D) None of these
Correct Answer: B
Solution :[b] Statement 1 is correct microwaves are generated in the oven by means of a magnetron. Statement 2 is incorrect heating occurs inside the food without warming the surrounding air. Statement 3 is also incorrect, as most type of glasses, papers etc do not absorb the microwaves and hence, do not heat up. Statement 4 is correct, microwaves oven generate microwave of megahertz frequency range.
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