The set up in the figure is used to study the relationship between current (I) and potential difference (V) for a wire X. The most likely shape of the graph of the potential difference (Y) against current (X) for the copper wire is:

The set up in the figure is used to study the relationship between current (I) and potential difference (V) for a wire X.

The ammeter is connected as shown because it has:

In the comparison of heat and electrical energy flowing along a well insulated conductor which of these is/are true?

1) The Pd across the ends of the conductor is analogous to the temperature difference between the ends of the conductor.

2) The electric current is analogous to the rate of flow of heat.

3) The electrical resistance is analogous to the of thermal conductivity.

The set up in the figure is used to study the relationship between current (I) and potential difference (V) for a wire X.

If the material X is a copper wire, the relationship between V and I when the switch is closed at constant temperature is:

The heating element of an electric kettle has a resistance of 30.0 Ω.

The kettle is connected to an a.c. power supply of root means square voltage 230 V.

The peak value of the current is: