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JEE PHYSICS MCQ: CURRENT ELECTRICITY
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Understanding
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Though the electron drift velocity is small and electron charge is very small, a conductor can carry an appreciably large current because:
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Correct option: A
Electron number density is very large
Option A (Electron number density is very large) is correct because the large current is due to the high number density of electrons in the conductor.
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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
