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JEE PHYSICS MCQ: CURRENT ELECTRICITY
1
Medium
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Application
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Resistance of a wire is . Its length is increased by stretching it. Calculate its new resistance.
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Correct option: A
Option A () is correct because the change in resistance is proportional to the square of the change in length when the wire is stretched.
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Statement-2: For most of the resistors, resistance increases with increase in temperature. The reciprocal of resistance is Corresponding to the resistance , which is order of colour coding on carbon resistors? In a meter bridge, the gaps are closed by resistance 2 and 3 ohms. The value of shunt to be added to 3 ohm resistor to shift the balancing point by is
Statement-2: For most of the resistors, resistance increases with increase in temperature. The reciprocal of resistance is Corresponding to the resistance , which is order of colour coding on carbon resistors? In a meter bridge, the gaps are closed by resistance 2 and 3 ohms. The value of shunt to be added to 3 ohm resistor to shift the balancing point by is