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JEE PHYSICS MCQ: CURRENT ELECTRICITY
1
Medium
1 of 1
Application
+4 | -1
Two cells are connected in the secondary circuit of a potentiometer one at a time and the balancing length are respectively . The emf of the cell is . The emf of the second cell is volt is
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Correct option: B
1.188
Option B (1.188) is correct because the emf of cell B is calculated using the potentiometer principle, where the ratio of emfs is equal to the ratio of balancing lengths.
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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