Heating effect in appliances — task. Science CBSE, Class 7.

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Select the right choice:

1. Loudspeaker is an example of

Electromagnets
Element
Magnets

2. Which is the suitable position for the key in the circuit?

Right side of the battery
Anywhere in the circuit
Left side of the battery

3. The heat produced in the wire depends on

Material of the coil
Thickness of the coil
All of the above

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