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JEE PHYSICS MCQ: CURRENT ELECTRICITY
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Medium
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Understanding
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Two potentiometers A and B having 4 wires and 10 wires, each having in length are used to compare e.m.f. of 2 cells. Which one will give a larger balancing length?
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Correct option: C
Potentiometer B
Option C (Potentiometer B) is correct because a potentiometer with more wires has a lower potential gradient, leading to a larger balancing length.
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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