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JEE PHYSICS MCQ: CURRENT ELECTRICITY
1
Medium
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Understanding
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Assertion: Conductivity of a metals is much higher than that of an electrolyte at room temperature.
Reason: Free electron density in metals is much larger than the density of ions in electrolytes and also free electrons have greater mobility than ions.
Reason: Free electron density in metals is much larger than the density of ions in electrolytes and also free electrons have greater mobility than ions.
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Correct option: A
If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion
Option A (If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion) is correct because metals have higher conductivity due to greater free electron density and mobility compared to electrolytes.
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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
