357039 If resistivity of copper is \(172 \times {10^{ - 8}}\Omega - m\) and number of free electrons in copper is \(8.5 \times {10^{28}}/{m^3}.\) Find the mobility.

357040 When no electric field is applied across a conductor, then consider the following statements.
I.
The electrons will be moving due to the thermal motion during which they collide with the fixed ions.
II.
An electron colliding with an ion emerges with the same speed as before the collision. However the direction of its velocity after the collision is completely random.
III.
At a given instant, the number of electrons travelling in any direction will be equal to the number of electrons travellling in the opposite direction. So, there will be no net electric current.
Which of the following statements is/are correct?

357041 Two wires of the same material but of different diameters carry the same current \(I\). If the ratio of their diameters is \(2: 1\), then the corresponding ratio of their mean drift velocities will be

357042 A current of 5 \(A\) is passing through a metallic wire of cross-sectional area \(4 \times {10^{ - 6}}{m^2}\). If the density of charge carriers of the wire is \(5 \times {10^{26}}{m^{ - 3}}\), the drift velocity of the electrons will be

357039 If resistivity of copper is \(172 \times {10^{ - 8}}\Omega - m\) and number of free electrons in copper is \(8.5 \times {10^{28}}/{m^3}.\) Find the mobility.

357040 When no electric field is applied across a conductor, then consider the following statements.
I.
The electrons will be moving due to the thermal motion during which they collide with the fixed ions.
II.
An electron colliding with an ion emerges with the same speed as before the collision. However the direction of its velocity after the collision is completely random.
III.
At a given instant, the number of electrons travelling in any direction will be equal to the number of electrons travellling in the opposite direction. So, there will be no net electric current.
Which of the following statements is/are correct?

357041 Two wires of the same material but of different diameters carry the same current \(I\). If the ratio of their diameters is \(2: 1\), then the corresponding ratio of their mean drift velocities will be

357042 A current of 5 \(A\) is passing through a metallic wire of cross-sectional area \(4 \times {10^{ - 6}}{m^2}\). If the density of charge carriers of the wire is \(5 \times {10^{26}}{m^{ - 3}}\), the drift velocity of the electrons will be

357039 If resistivity of copper is \(172 \times {10^{ - 8}}\Omega - m\) and number of free electrons in copper is \(8.5 \times {10^{28}}/{m^3}.\) Find the mobility.

357040 When no electric field is applied across a conductor, then consider the following statements.
I.
The electrons will be moving due to the thermal motion during which they collide with the fixed ions.
II.
An electron colliding with an ion emerges with the same speed as before the collision. However the direction of its velocity after the collision is completely random.
III.
At a given instant, the number of electrons travelling in any direction will be equal to the number of electrons travellling in the opposite direction. So, there will be no net electric current.
Which of the following statements is/are correct?

357041 Two wires of the same material but of different diameters carry the same current \(I\). If the ratio of their diameters is \(2: 1\), then the corresponding ratio of their mean drift velocities will be

357042 A current of 5 \(A\) is passing through a metallic wire of cross-sectional area \(4 \times {10^{ - 6}}{m^2}\). If the density of charge carriers of the wire is \(5 \times {10^{26}}{m^{ - 3}}\), the drift velocity of the electrons will be

357039 If resistivity of copper is \(172 \times {10^{ - 8}}\Omega - m\) and number of free electrons in copper is \(8.5 \times {10^{28}}/{m^3}.\) Find the mobility.

357040 When no electric field is applied across a conductor, then consider the following statements.
I.
The electrons will be moving due to the thermal motion during which they collide with the fixed ions.
II.
An electron colliding with an ion emerges with the same speed as before the collision. However the direction of its velocity after the collision is completely random.
III.
At a given instant, the number of electrons travelling in any direction will be equal to the number of electrons travellling in the opposite direction. So, there will be no net electric current.
Which of the following statements is/are correct?

357041 Two wires of the same material but of different diameters carry the same current \(I\). If the ratio of their diameters is \(2: 1\), then the corresponding ratio of their mean drift velocities will be

357042 A current of 5 \(A\) is passing through a metallic wire of cross-sectional area \(4 \times {10^{ - 6}}{m^2}\). If the density of charge carriers of the wire is \(5 \times {10^{26}}{m^{ - 3}}\), the drift velocity of the electrons will be