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प्रश्न
From the following observations taken while determining the resistance of a conductor, draw the current-voltage graph and calculate the resistance of conductor. Is the conductor ohmic?
| Ammeter reading I (in ampere) | Voltmeter reading V (in volt) |
| 0.2 | 0.4 |
| 0.3 | 0.6 |
| 0.5 | 1.0 |
| 0.8 | 1.6 |
| 1.5 | 3.0 |
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उत्तर
The current-voltage graph is shown in figure.
Resistance R = `(triangle"V")/(triangle"I")`
`= ((3.0 - 0.6)"V")/((1.5 - 0.3)"A")`
`= (2.4"V")/(1.2"A") = 2 Omega`
The conductor is ohmic.
संबंधित प्रश्न
How much work is done when one coulomb charge moves against a potential difference of 1 volt?
What is the unit of electric charge?
State the relation between potential difference, work done and charge moved.
If a potential difference of 10 V causes a current of 2 A to flow for 1 minute, how much energy is transferred?
The other name of potential difference is:
Name the law which relates the current in a conductor to the potential difference across its ends.
b. The values of potential difference V applied across a resistor and the correponding values of current I flowing in the resistor are given below:
| Potential difference, V (in volts) | : | 2.5 | 5.0 | 10.0 | 15.0 | 20.0 | 25.0 |
| Current, I (in amperes) | : | 0.1 | 0.2 | 0.4 | 0.6 | 0.8 | 1.0 |
Plot a graph between V and I, and calculate the resistance of the resistor.
c. Name the law which is illustrated by the above V-I graph.
100 joules of heat is produced per second in a 4 ohm resistor. What is the potential difference across the resistor?
Calculate the current flowing through each of the resistors A and B in the circuit shown in the following figure.
100 J of heat is produced each second in a 4 Ω resistor. The potential difference across the resistor will be:
