Question

27. n)Define resistance, what are the factors affecting resistance
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Answer 1

Answer:

According to Ohm’s law, there is a relation between the current flowing through a conductor and the potential difference across it.

The electrical resistance of a conductor is dependent on the following factors:

• The cross-sectional area of the conductor

Length of the conductor

The material of the conductor

The temperature of the conducting material

Answer 2

Answer:

Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the relationship between voltage, current and resistance.

There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of the wire, and nature of the material. When there is current in a conductive material, the free electrons move through the material and occasionally collide with atoms.

Resistance is defined as the opposition to the flow of electrical current through a conductor. The resistance of an electric circuit can be measured numerically. Conductivity and resistivity are inversely proportional