Advertisements
Advertisements
Question
List the factors on which the resistance of a conductor in the shape of a wire depends.
Advertisements
Solution
The resistance of a conductor in the shape of a wire depends on the following factors:
- Length of the conductor
- The cross-sectional area of the conductor
- The temperature of the conductor
- Nature of the material used
APPEARS IN
RELATED QUESTIONS
Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be:
Which has less electrical resistance : a thin wire or a thick wire (of the same length and same material)?
Classify the following into good conductors, resistors and insulators:
Rubber, Mercury, Nichrome, Polythene, Aluminium, Wood, Manganin, Bakelite, Iron, Paper, Thermocol, Metal coin
Which has more resistance:
a thick piece of nichrome wire or a thin piece?
What do you understand by the "resistivity" of a substance?
What would be the effect on the resistance of a metal wire of:
increasing its temperature?
The effective resistance between A and B is:

A cylindrical conductor of length l and uniform area of cross-section A has resistance R. Another conductor of length 2l and resistance R of the same material has an area of cross-section:
Assertion: Conductors allow the current to flow through themselves.
Reason: They have free charge carriers.
How will the resistance of a wire be affected if its
- length is doubled, and
- radius is also doubled ?
Give justification for your answer.
