Question

state ohms law and define factors on which it depends
4rth question​

Answer 1

Answer:

Ohms Law-

Ohm’s law states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance, and directly proportional to the resistance of the circuit. The formula for Ohm’s law is V=IR.

Factors on which resistance of a conductor depends-

The resistance of a conductor depends on thickness (cross sectional area of the wire), length and temperature.

The resistance of a conductor depends on thickness (cross sectional area of the wire), length and temperature.Resistivity is defined as the measure of the resisting power of a specified material to the flow of an electric current.

The resistance of a conductor depends on thickness (cross sectional area of the wire), length and temperature.Resistivity is defined as the measure of the resisting power of a specified material to the flow of an electric current.R=ρl/A

where R = Resistance of the conductor

where R = Resistance of the conductorρ = Resistivity of the conductor

where R = Resistance of the conductorρ = Resistivity of the conductorl = length of the conductor

where R = Resistance of the conductorρ = Resistivity of the conductorl = length of the conductorA = Area of cross section

where R = Resistance of the conductorρ = Resistivity of the conductorl = length of the conductorA = Area of cross sectioni.e., ρ=RA/l

Unit of resistivity is Ωm.

Answer 2

Ohm's Law :

A law stating that electric currently proportional to voltage and inversely proportional to resistance.

Factors on which it depends are:-

• Length of wire .
• Cross section area of thickness of wire .
• Nature of the material.
• Temperature resistence of wire is directly proportional to length and temperature and inversely proportional to cross section area.

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