Advertisements
Advertisements
प्रश्न
What happens to the resistance, as the conductor is made thicker?
Advertisements
उत्तर
The resistance of a conductor is inversely proportional to the area of cross-section of the conductors. Hence, resistance is inversely proportional to the square of the radius of the conductor.
R ∝ \(\frac{1}{A}\)
R ∝ \(\frac{1}{r^2}\)
When a conductor is made thicker, the radius will be increased and so its resistance will be decreased.
APPEARS IN
संबंधित प्रश्न
How does the resistance of a wire depend on its length? Give a reason for your answer.
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?
Two conductors of resistance 2 R and R are connected in series in a battery circuit. The ratio of heat developed In them is ______.
If the area of cross-section of the conductor is doubled its resistance gets ______.
Three resistors are connected in series with a cell. If the current in each resistor is 1.5A, then the current through the cell will be ______.
Three resistors are connected in parallel with a battery. If the current in each resistor is 2A, then the current through the battery will be ______.
Define the following:
Fixed 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?
