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Electric Current - Questions and Answers

Practice questions on Electric Current.

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1. The drift velocity of the electrons is given by Vd =
A. Ee τ2
B. e/m. τ
C. Ee/ τ. m
D. eE/m. τ
Explanation:
2. The electric current in a conductor is measured based on
A. the number of free electrons available
B. the rate of flow of electrons
C. the quantity of charge flow
D. resistance of the conductor
Explanation:
3. The flow of electric current in a conductor is due to
A. the Coulomb force on free electrons
B. the Lorentz force on electrons
C. the low resistivity of a conductor
D. the potential difference across the ends of a conductor
Explanation:
4. In the presence of an electric field, the free electrons
A. move in the direction of the electric field
B. move in all random directions
C. move at a constant speed
D. get accelerated in the direct of electric field
Explanation:
5. In an electric field, the acceleration of an electron is
A. a = mE/e
B. me/E
C. a = eE/m
D. e/mE
Explanation:
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