science
Grade-1
Easy
Question
What signal does your microwave send to tell you that your food is reheated?
- Light signal
- Sound signal
- Both 1 and 2
- It does not send any signal
Hint:
This question is from the topic Kinds of Signals
The correct answer is: Both 1 and 2
- When micro wave is used to heat food it uses both Light and sound signal for tell that food is heated.
- So Option 3 is correct.
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