A potential difference is applied to a conductor of length , diameter . How are the electric field , the drift velocity and the resistance affected when is doubled?
Important Questions on Current Electricity
The variation of the resistance of a metallic conductor with temperature is shown in Fig.
Calculate the temperature coefficient of resistance from the graph.
The variation of the resistance of a metallic conductor with temperature is shown in Fig.
State why the resistance of the conductor increases with the rise in temperature.
The following table gives the length of three copper wires, their diameters, and the applied potential difference across their ends. Arrange the wires in increasing order according to the following:
| Wire No. | Length | Diameter | Potential difference |
The magnitude of the electric field within them.
The following table gives the length of three copper wires, their diameters, and the applied potential difference across their ends. Arrange the wires in increasing order according to the following:
| Wire No. | Length | Diameter | Potential difference |
The drift speed of electrons through them.
The following table gives the length of three copper wires, their diameters, and the applied potential difference across their ends. Arrange the wires in increasing order according to the following:
| Wire No. | Length | Diameter | Potential difference |
The current density within them.
