Advertisements
Advertisements
प्रश्न
Name three factors on which resistance of a given wire depends and state how is it affected by the factors stated by you.
Advertisements
उत्तर
The following factors can affect a wire's resistance:
- Length of wire: The resistance increases as the wire length increases. R ∝ (l) (directly proportional).
- Area of cross-section (a): The area of the cross-section has an inverse relationship with resistance. For example, the resistance of a thick wire is lower than that of a thin one.
- Temperature (T): As the temperature rises, the resistance of the wire also rises.
संबंधित प्रश्न
How does the resistance of a wire depend on its radius? Explain your answer.
How does the resistance of a wire depend on its length? Give a reason for your answer.
Draw a I–V graph for a linear resistor. What does its slope represent?
Two wires of the same material and same length have radii 1 mm and 2 mm respectively. Compare their resistances.
Resistance of a wire depends on, ______.
______ is the only non-metal that is a good conductor of electricity.
The ______ is the measure of opposition offered by the component to the flow of electric current through it.
A rheostat is also known as fixed resistance.
Define the following:
Variable resistor
|
5 bulbs are connected in series in a room. One bulb is fused. It is removed and remaining 4 bulbs are again connected in series to the same circuit. What will be the effect on the following physical quantities? (Increases, Decreases, Remain Same). |
- Resistance
- Intensity of light
