Current Of Electricity

Question 1

Define electric current

Answer 1

It is the rate of flow of charged particles

Question 2

what does the “n” define in I=nAvq?

Answer 2

Number density of charge carries

Question 3

Define electric potential difference

Answer 3

The potential difference across a device is the electrical energy converted to other forms of energy per unit charge passing through the device.

Question 4

Define emf

Answer 4

Emf of a source is the electrical energy converted from other forms of energy per unit charge, transferred by the source in driving unit charge round a complete circuit.

Question 5

Define resistance

Answer 5

The resistance of a conductor is the ratio of potential difference across it to the current flowing through it.

Question 6

Define ohm’s law

Answer 6

Ohm’s law states that the current through a metallic conductor is proportional to the potential difference across its ends under constant physical conditions.

Question 7

Define resistivity

Answer 7

Resistivity is a measure of how strongly a materal opposes electric current. It characterises the resistance of materials at a fixed temperature regardless of the materials’ dimensions.