What is the principle of rheostat?

A rheostat works on the principle of Ohm’s law. Ohm’s law states that the current in a circuit is inversely proportional to the resistance at the given temperature.

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Related Questions

1. What Is The Formula Of Ammeter?
2. What is the necessary condition for a conductor to obey Ohm's Law?
3. Why is the series arrangement not used for domestic circuits?
4. Define: 1 volt, Potential difference
5. The resistance R= V/I, where V=100 ± 5.0V and I = 10 ± 0.2A. What is the total error in R?
6. Draw a circuit diagram to verify ohm’s law.
7. Is resistance constant in Ohm's law?
8. What are the applications of ohm's law used in daily life?
9. State And Explain Joules Law Of Heating.
10. Why is the curve representing Ohm's law linear?
11. What are ohmic and non-ohmic devices? Give examples.
12. Obtain the equation J = σE of Ohm's law on the basis of drift velocity
13. Find the current through a resistance 2 ohm if the voltage across the resistance is 6 V.
14. A small bulb has a resistance of 2 ohms when it is cold. It draws 0.4-ampere current from a source of4V and then starts glowing. Calculate the resistance when it is glowing
15. Why Do We Use Ohm's Law?

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