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Easy Electric current: drift velocity, mobility and their relation with electric current MCQs for JEE

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Part of Current Electricity in JEE Main Physics.

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Q1PhysicsUnit 12: Current Electricity
A straight conductor of uniform cross- section carried a current I. Let s=specific charge of an electron. The momentum of all the free electrons per unit length of the conductor, due to their drift velocities only, is
Q2PhysicsUnit 12: Current Electricity
In a metallic conductor, electric current is thought to be due to the movement of
Q3PhysicsUnit 12: Current Electricity
For a common emitter amplifier, current gain is 60.60 . If the emitter current is 6.6 mA6.6 ~ m A the collector current is :
Q4PhysicsUnit 12: Current Electricity
Which of the following is/are correct about the direction of holes/electron? This question has multiple correct options
Q5PhysicsUnit 12: Current Electricity
Which of the following instruments is used to check whether electricity is flowing through a substance or not?
Q6PhysicsUnit 12: Current Electricity
Assertion If we bend an insulated conducting wire, the resistance of the wire increases. Reason The drift velocity of electrons in bent wire decreases.
Q7PhysicsUnit 12: Current Electricity
Mobility of free electrons in a conductor ¡s:
Q8PhysicsUnit 12: Current Electricity
A steady current flow in a metallic conductor of non-uniform cross-section. The quantity/quantities remaining constant along the whole length of the conductor is/are:

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