Podcast
Questions and Answers
What does the variation of resistivity with absolute temperature look like for a copper conductor?
What does the variation of resistivity with absolute temperature look like for a copper conductor?
- Decreasing linearly
- Remaining constant (correct)
- Exponential decrease
- Increasing linearly
Select the correct expression for the drift velocity of conduction electrons in a metallic conductor.
Select the correct expression for the drift velocity of conduction electrons in a metallic conductor.
- vd = 2eE τ m
- vd = eE / τ m (correct)
- vd = τ^2 m
- vd = − eE τ 2m
What is the formula for resistivity of a metallic conductor in terms of electron charge (e), electron mass (m), charge carrier density (n), and relaxation time (τ)?
What is the formula for resistivity of a metallic conductor in terms of electron charge (e), electron mass (m), charge carrier density (n), and relaxation time (τ)?
- ρ = me^2 τ n
- ρ = 2 ne
- ρ = 2 ne τ (correct)
- ρ = ne^2 τ m
When the current flowing through a conductor is doubled while keeping the area of cross-section double, what happens to the drift velocity?
When the current flowing through a conductor is doubled while keeping the area of cross-section double, what happens to the drift velocity?
How does the drift velocity vary with the intensity of the electric field?
How does the drift velocity vary with the intensity of the electric field?
What is the mobility of conduction electrons in a metallic conductor with an average relaxation time of $10^{-14}$ sec?
What is the mobility of conduction electrons in a metallic conductor with an average relaxation time of $10^{-14}$ sec?
Which statement regarding the drift velocity of conduction electrons in a metallic conductor is correct?
Which statement regarding the drift velocity of conduction electrons in a metallic conductor is correct?
What is the mobility of conduction electrons in a metallic conductor with a drift velocity of 7.5 × $10^{-4}$ m/s under an electric field of 3 × $10^{-9}$ V/m?
What is the mobility of conduction electrons in a metallic conductor with a drift velocity of 7.5 × $10^{-4}$ m/s under an electric field of 3 × $10^{-9}$ V/m?
In a conductor with a non-uniform cross-section, what can be said about the relationship between drift velocities at points A and B?
In a conductor with a non-uniform cross-section, what can be said about the relationship between drift velocities at points A and B?
What is the average drift velocity of conduction electrons in a conductor with a cross-section area of $1 × 10^{-7}$ m$^2$, carrying a current of 1.5A?
What is the average drift velocity of conduction electrons in a conductor with a cross-section area of $1 × 10^{-7}$ m$^2$, carrying a current of 1.5A?
Which factor affects the drift velocity of conduction electrons in a metallic conductor?
Which factor affects the drift velocity of conduction electrons in a metallic conductor?
