Advertisements
Advertisements
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 |
Advertisements
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
By what other name is the unit joule/coulomb called?
What do you understand by the term "electric potential"? (or potential) at a point? What is the unit of electric potential?
What do you understand by the term "potential difference"?
The p.d. across a lamp is 12 V. How many joules of electrical energy are changed into heat and light when:
a charge of 5 C passes through it?
The other name of potential difference is:
A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What current will flow in the resistance?
What p.d. is needed to send a current of 6 A through an electrical appliance having a resistance of 40 Ω?
State Ohm’s law.
Name the instrument which is used to measure the potential difference.
What is the measure of the work done on the unit positive charge to bring it to that point against all electrical forces?
