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JEE PHYSICS MCQ: CURRENT ELECTRICITY
1
Medium
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Analyzing
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Statement I : Specific resistance depends on nature of material and independent of temperature of the material.
Statement II : A wire of resistance is drawn out so that its new length is four times its original length. The resistance of the new wire is .
Statement III: Drift velocity is the average constant velocity acquired by free electrons inside a metal by the application of an electric field which results in current.
Which of the following is correct?
Statement II : A wire of resistance is drawn out so that its new length is four times its original length. The resistance of the new wire is .
Statement III: Drift velocity is the average constant velocity acquired by free electrons inside a metal by the application of an electric field which results in current.
Which of the following is correct?
View answer and explanation
Correct option: C
Statement III is true, but Statements I, II are false
Option C (Statement III is true, but Statements I, II are false) is correct because specific resistance depends on both material and temperature, and the resistance of the wire becomes 96 ohms.
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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