What is meant by resistance of a
conductor? Name and define its SI unit.
List the factors on which the resistance of a
conductor depends. How is the resistance
of a wire affected, if (i) its length is doubled,
(ii) its radius is doubled?
Answers
Answer:
Resistance is the property of the conductor to resist the flow of current. SI unit of Resistance is Ohm. The resistance of current depends on Material of the wire, length and cross-section area of the wire and temperature. ... area :-resistance of a conductor is inversely proportional to its cross sectional area.
Answer:
Resistance is defined as the opposition to the flow of electrical current through a conductor. It's important to point out that conductivity and resistivity (the property that determines final resistance) are inversely proportional.
SI unit is 'ohm'. the SI unit of electrical resistance, transmitting a current of one ampere when subjected to a potential difference of one volt.
(i) Resistance of a wire is directly proportional to the length of a wire; so if the length is doubled, resistance is also doubled.
(ii) Resistance of a wire is inversely proportional to the area of cross-section the wire. Thus, if radius is doubled, area increases four times and hence the resistance becomes one-fourth.
Explanation:
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