On what factors that resistance is depend and how
Answers
Explanation:
resistance is depend on length area and temperature
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=ρAl
where R = Resistance of the conductor
ρ = Resistivity of the conductor
l = length of the conductor
A = Area of cross section
i.e., ρ=RlA
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 2Ωresistors which are in series with each other.
R1=2+2=4Ω
R2=2+2=4Ω
Total resistance, R=R1+R2R1×R2=4+44×4=2Ω
Total current flowing in the circuit, I=RV=26=3A