EASY
Earn 100

Describe factors affecting drift velocity.

Important Questions on Electric Current

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Define the unit of current.
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The direction of drift velocity of electrons in a conductor is the same as that of the electric field.
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What do we need to make a device which works on electricity?
MEDIUM
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What happens to the motion of the electrons in an open circuit?
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What is the difference between a direct current and an alternating current? How many times does AC used in India change direction in one second?
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In the absence of a battery,
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Which of the following is a conductor?
MEDIUM
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Explain how electron flow causes electric current with Lorentz-Drude theory of electrons. 
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What changes occur to the drift velocity of free electrons when we heat a conductor?

MEDIUM
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What happens to the motion of electrons when the ends of the conductor are connected to the battery? 
HARD
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Why do electrons move in a specified direction when the ends of the conductor are connected to the battery? 
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Metals have ______ resistance.
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A copper wire of 10-6 m2 area of cross section, carries a current of 4 A. If the number of electrons per cubic meter is 8×1028, calculate the average drift velocity.
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Choose the odd one out.
MEDIUM
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The drift speed of charge carriers in a conductor, connected between terminals of the conductor is vd, when it carries the current I. When the length of the conductor is reduced by half, the drift speed of the charge carriers at a given point in it
MEDIUM
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The electrons moving in a specified direction when the ends of the conductor are connected to the battery, are accelerated continuously.
EASY
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The net charge moving along a conductor through any cross-section is _____ when the conductor is in open circuit.
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Science>Physics>Electric Current>Electric Current
Cotyledons are also called-
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Science>Physics>Electric Current>Electric Current
Does motion of charge always lead to electric current?
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Science>Physics>Electric Current>Electric Current
Drift velocity and thermal velocity of electrons determines the current in a conductor.