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JEE PHYSICS MCQ: CURRENT ELECTRICITY
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When a current is set up in a wire of radius , the drift velocity is . If the same current is set up through a wire of radius , the drift velocity will be
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Correct option: D
Option D () is correct because drift velocity is inversely proportional to the cross-sectional area of the wire, which depends on the square of the radius.
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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