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JEE PHYSICS MCQ: CURRENT ELECTRICITY
1
Medium
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Application
+4 | -1
Resistance of a conducting wire is ' '. Calculate its new resistance in case of -times the length by stretching it.
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Correct option: A
Option A () is correct because when a wire is stretched to n times its length, its resistance increases by a factor of n2.
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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