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प्रश्न
Draw a graph of Potential difference (V) versus Current (I) for an ohmic resistor. How can you find the resistance of the resistor from this graph?
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उत्तर
We can find resistance by finding the slope of the graph.
Graph of V versus I for an Ohmic conductor
We can find resistance by finding the slope of the graph.
संबंधित प्रश्न
The values of current (I) flowing through a given resistor of resistance (R), for the corresponding values of potential difference (V) across the resistor are as given below:
| V (volts) | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 4.0 | 5.0 |
| I (amperes) | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.8 | 1.0 |
Plot a graph between current (I) and potential difference (V) and determine the resistance (R) of the resistor.
The device used for measuring potential difference is known as:
The other name of potential difference is:
A resistance of 20 ohms has a current of 2 amperes flowing in it. What potential difference is there between its ends?
How is the electric potential difference between the two points defined? State its S.I. unit.
What do you understand by the resistance of a wire?
A cell of e.m.f 2.0 V and internal resistance 1Ω is connected to the resistors of 3Ω and 6Ω in series. Calculate:
(i) the current drawn from the cell,
(ii) the p.d. across each resistor,
(iii) the terminal voltage of the cell and
(iv) the voltage drop.
An electric bulb draws 0.5 A current at 3.0 V. Calculate the resistance of the filament of the bulb.
A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is:
Twenty-seven drops of same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.
