Advertisements
Advertisements
प्रश्न
State three factors on which the resistance of a wire depends. Explain, how does the resistance depend on the factors stated by you.
Advertisements
उत्तर
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
संबंधित प्रश्न
Name the instrument used to control the current in an electric circuit.
In the electric circuit shown in Figure, label the parts A, B, C, D, E, and F. State the function of each part. Show in the diagram the direction of flow of current.
The unit of potential difference is :
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 lower potential before electrical contact on the basis of convention?
State the relation between electric current; the number of electrons moving in a circuit and time in seconds.
Write SI unit of
Electric current,
A wire of resistance 1 Ω is stretched to double its length. What will happen to the resistance of the stretched wire?
