Flow of Electrons

Q.

The number of electrons flowing in 1 second when $1A$ current flows through a wire is:

[Take charge on one electron $=1.6\times {10}^{-19}C$]

1. $6.25\times {10}^{18}$

2. $7\times {10}^{18}$

3. $6.5\times {10}^{18}$

4. $6\times {10}^{18}$

Q.

What is responsible for the flow of current through a metallic conductor?

1. Flow of neutron

2. Flow of atoms

3. Flow of proton

4. Flow of electron

Q.

The charge on an electron is known to be $1.6\times {10}^{-19}$ C. In a circuit, the current flowing is 1 A. How many electrons will be flowing through the circuit per second?

1. 1.6 x 10¹⁹

2. 0.625 x 10¹⁹

3. 1.6 x 10^-19

4. 0.625 x 10¹²

Q. Which of the following particles constitute the electric current in a metallic conductor?

1. Protons and neutrons
2. Protons
3. Electrons
4. Neutrons

Q.

Electric current is expressed by the number of neutrons flowing through a particular area per unit time.

1. True

2. False

Q. Direction of current is always opposite to the direction of.

1. electric field
2. protons
3. electrons

Q. The drift velocity is inversely proportional to the cross sectional area of the conductor for a constant current flow.

1. False
2. True

Q. Which of the following is the mobile charge carrier in a current-carrying conductor?
(a) Electrons
(b) Protons
(c) Neutrons
(d) Deutrons

[1 Mark]

Q.

Find the electric current that flows through a conductor if a charge of $0.8C$ flows through it in $4seconds$.

1. $0.01A$

2. $0.5A$

3. $0.2A$

4. $0.25A$

Q.

What is the direction of flow of current with respect to electron?

1. No relation with electrons

2. Can't say

3. Opposite to the flow of electrons

4. Same as the flow of electrons

Q.

When starter motor of a car is switched on for 0.8 s , 24 C of charge passes through the coil of the motor. Calculate the current in the motor.