Advertisements
Advertisements
рдкреНрд░рд╢реНрди
How does the resistance of a wire depend on its radius? Explain your answer.
Advertisements
рдЙрддреНрддрд░
Resistance of a wire is inversely proportional to the area of cross-section of the wire.
`R ∝ 1/"r"^2 or R prop 1/"a" or R ∝ 1/"ЁЭЬЛЁЭСЯ"^2`
where 'a' is the area of cross-section and r is the radius of wire and R is the resistance. In other words thick wire offers less resistance and thin wire offers more resistance. In thick conductor electrons suffer less collisions.
APPEARS IN
рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНтАНрди
Two copper wires are of the same length, but one is thicker than the other. Which wire will have more resistance?
How does the resistance of a wire depend on its length? Give a reason for your answer.
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, ______.
The ______ is the measure of opposition offered by the component to the flow of electric current through it.
The process of conduction of electric current through the solution is called ______.
Match the following:
| Column I | Column II | ||
| 1. | Resistor | a. | Galvanometer |
| 2. | Connecting wire | b. | Voltmeter |
| 3. | Current in an electric circuit | c. | Copper |
| 4. | Potential difference | d. | Constantan |
Define the following:
Variable resistor
Define the term resistance.
Two copper wires are of the same length, but one is thicker than the other. Which wire will have more specific resistance?
