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JEE PHYSICS MCQ: CURRENT ELECTRICITY
1
Medium
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Application
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In a potentiometer experiment the balancing length, with a cell is . When an external resistance of is connected in parallel to the cell, the balancing length changes by . Find the internal resistance of the cell.
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Correct option: B
Option B () is correct because it is calculated using the potentiometer formula for internal resistance.
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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