Advertisements
Advertisements
प्रश्न
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 |
Advertisements
उत्तर
Resistance(R) = \[\frac{\text{∆V}}{\text{∆I}}\]
= 10.2 – `"6.7"/"3"` – 2 = 3.5/1
R = 3.5Ω
APPEARS IN
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.
The effective resistance of three resistors connected in series is lesser than the lowest of the individual resistances.
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 ______.
The ______ is the measure of opposition offered by the component to the flow of electric current through it.
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:
Fixed resistor
Observe the given circuit diagram and answer the questions that follow:
- Calculate the resistance of the circuit when the key K completes the circuit.
- Calculate the current through 3Ω resistance when the circuit is complete.
