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JEE PHYSICS MCQ: CURRENT ELECTRICITY
1
Medium
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Application
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A cylindrical metallic wire is stretched to increase its length in such a way that the metallic wire changes its resistance by . The percentage increase in its length is
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Correct option: C
Option C (3 %) is correct because the percentage increase in length is approximately 3% when the resistance increases by 6%.
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Statement-1: If a resistor is connected to a battery the current decreases when the temperature increases.
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