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Question
The relation between the temperature (T) of a fuse wire and the current (I) passing through it, is given by ΔT∝I2, at constant resistance.
Which of the following plots correctly represents the relation?
The relation between the temperature (T) of a fuse wire and the current (I) passing through it, is given by ΔT∝I2, at constant resistance.
Which of the following plots correctly represents the relation?
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Solution
The correct option is B
A safety fuse is used to protect home appliances from harmful amount of electric current. As soon as the current through the fuse exceeds the allowed limit, the wire heats up and melts. The temperature of a fuse wire changes with the square of the electric current passing through it, at constant resistance. The relation hence, would look like this, like a y = x2 parabola: 
A safety fuse is used to protect home appliances from harmful amount of electric current. As soon as the current through the fuse exceeds the allowed limit, the wire heats up and melts. The temperature of a fuse wire changes with the square of the electric current passing through it, at constant resistance. The relation hence, would look like this, like a y = x2 parabola:
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