Advertisements
Advertisements
Question
State three factors on which the resistance of a wire depends. Explain, how does the resistance depend on the factors stated by you.
Advertisements
Solution
The factors on which resistance of the wire depends are :
(i) The length of the wire, resistance is directly proportional to the length of the wire.
(ii) The cross-section of the wire, resistance is inversely proportional to the cross-section of the wire.
(iii) The temperature of the wire, the resistance of wire is directly proportional to the temperature of the wire.
(iv) The material of the wire (good conductors possess less resistance.)
APPEARS IN
RELATED QUESTIONS
A cell is used to :
In transferring 1.5 C charge through a wire, 9 J of work is needed. Find the potential difference across the wire.
There is a positively charged sphere A and negatively charged sphere B, such that they are brought in electrical contact by a copper wire.
Which sphere is at higher potential before electrical contact on the basis of convention?
What do you understand by the term electric potential?
What do you understand by the term electric current?
State two characteristics of resistances in the series circuit.
What do you understand by the term parallel circuit?
'The resistance of a wire is 2 ohm'. Explain the meaning of this statement.
What type of circuit is there in a torch light?
