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Which of the following statements describes an electric generator?

Electric potential in a rotating coil of a wire creates a temporary magnet.

A coil of wire is rotated through a strong magnetic field to produce an electric current.

An electrical current causes a coil of wire to rotate in a magnetic field.

Forces from a permanent magnet allow a coil of wire to rotate.

An impulse of 100 N is applied to an object.

If this same impulse is delivered over a longer time interval:

The force involved will be decreased.

The momentum transferred will be decreased.

The force involved will be increased.

The momentum transferred will be increased.

An ammeter of full scale deflection 5.00 mA is being used to read a current of size 5.00 A.

This can be achieved by:

Connecting it in parallel with a resistance of 49.95 Ω.

Connecting it in parallel with a resistance of 0.49 Ω.

Connecting it in parallel with a resistance of 0.02 Ω.

Connecting it series with a resistance of 980.00 Ω.

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.

If 1 only is correct.

If 2 and 3 are correct.

If 3 only is correct.

If 1 and 2 are correct.

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:

Coulomb’s law.

Hooke’s law.

Lenz’s law.

Ohm’s law.