Physics
Grade-7
Easy
Question
In which one of the following conditions the amount of heat produced in a current-carrying wire will increase?
- When terminals of are changed
- When the amount of current passing in the wire is increased
- When the amount of current passing in the wire is decreased
- All of these
Hint:
Amount of current passing in the wire is increased
The correct answer is: When the amount of current passing in the wire is increased
In a circuit if current is increased, heat will increase as heat is directly proportional to the square of current. So if current is double the heat produced will be four times.
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