Conductor and Drift Velocity Quiz

What is the reason that electrons do not move in a straight line inside a conductor?

• They are affected by the Earth's magnetic field

• They collide into other particles within the conductor

• They are attracted to the ions in the conductor

• They are repelled by the conductor material

Answer explanation

Electrons do not move in a straight line inside a conductor because they collide with other particles within the conductor.

What is the overall velocity of the random motion of electrons when there is no potential difference between the two ends of the conductor?

• Variable

• Negative

• Positive

• Zero

Answer explanation

The overall velocity of electrons is zero when there is no potential difference between the two ends of the conductor.

What is the average velocity of the electrons in one direction when a potential difference is applied across the conductor?

• Drift velocity

• Random velocity

• Static velocity

• Accelerated velocity

Answer explanation

The average velocity of the electrons in one direction when a potential difference is applied across the conductor is called drift velocity. It represents the net motion of electrons in a conductor due to an electric field.

What is the expression for drift velocity in terms of current?

• I = AVE/n

• I = AV + E

• I = A/VnE

• I = AVnE

Answer explanation

The expression for drift velocity in terms of current is I = AVnE. This equation represents the relationship between current (I), cross-sectional area (A), charge carrier velocity (V), charge carrier density (n), and charge carrier charge (E).

What does the equation I = AVnE show about the relationship between drift velocity and current?

• There is no relationship between drift velocity and current

• The drift velocity has no effect on the current

• The larger the drift velocity, the smaller the current

• The larger the drift velocity, the larger the current

Answer explanation

The equation I = AVnE shows that the larger the drift velocity, the larger the current. This means that as the drift velocity increases, the current also increases.

What does the symbol 'e' represent in the context of the total charge within a section of the conductor?

• The number of electrons per unit volume

• The total number of electrons

• The cross-sectional area

• The charge on one single electron

Answer explanation

The symbol 'e' represents the charge on one single electron, which is the correct choice.