Explain the factor on which the resistance of a conductor depends the help of a neat labelled diagram.
Answers
Answer:
(a) 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=ρ
A
l
where R = Resistance of the conductor
ρ = Resistivity of the conductor
l = length of the conductor
A = Area of cross section
i.e., ρ=R
l
A
Unit of resistivity is Ωm.
(b) In the given circuit, the two 2Ω resistors are in series with each other and these resistors are in parallel with other two 2Ω resistors which are in series with each other.
R
1
=2+2=4Ω
R
2
=2+2=4Ω
Total resistance, R=
R
1
+R
2
R
1
×R
2
=
4+4
4×4
=2Ω
Total current flowing in the circuit, I=
R
V
=
2
6
=3A
Explanation:
hope it's helpful to you ❤️☺️
Answer:
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. The more conductive, the less resistance it will have.
Resistance = Potential difference/ Current