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प्रश्न
Two copper wires are of the same length, but one is thicker than the other. Which wire will have more resistance?
उत्तर १
We know that,
R = `ρl/A`
Where, ρ = specific resistance
L = length of wire
A = area of cross-section
let the area of the cross-section of the wires be A1 & A2. It is said that one is thicker than the other.
So A1 > A2
When the length of the wire is given to be the same then we can see that `R prop 1/A`.
So, the wire with less area of the cross-section will have more resistance.
उत्तर २
The area of the cross-section has an inverse relationship to resistance, so a thinner wire will have more resistance.
संबंधित प्रश्न
Name three factors on which resistance of a given wire depends and state how is it affected by the factors stated by you.
Exercise.
The values of current (I) flowing through a resistor for various potential differences V across the resistor are given below. What is the value of resistor?
| I (ampere) | 0.5 | 1.0 | 2.0 | 3.0 | 4.0 |
| V (volt) | 1.6 | 3.4 | 6.7 | 10.2 | 13.2 |
What is resistance?
The resistance of a straight conductor is independent of ______.
What is the maximum resistance one can make with ten 1Ω resistors?
The resistance of a conductor is R. If Its length is doubled, then its new resistance will be ______.
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.
|
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
Two copper wires are of the same length, but one is thicker than the other. Which wire will have more specific resistance?
