8. Define resistance and resistivity and also give the relation between them. Explain the dependence of resistance on temperature.
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RESISTANCE ❤
¤ Resistansnce is A measuring of meterial ABILITY ro opposite the electric current theouh it.
RESISTIVITY ❤
¤ ITS measurint the unit of tje electric Resistansnce of a unit lenth and unit Cross section of a meterial.
equalition of in between
relering presentivity (ρ) and resistance (R) of a conductor of length (L) and area (A)
R= p×L/A
DEPENDENCE OF RESISTANCE ON TEMPERATURE ❤
Resistance of conductors increases with rise in temperature while resistance of semiconductors and electrolytes decreases with rise in temperature.
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