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प्रश्न
Define the following:
Potential difference
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उत्तर
Potential difference: The potential difference between two points may be defined as the work done in moving a unit positive charge from one point to the other.
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संबंधित प्रश्न
Name a device that helps to maintain a potential difference across a conductor.
What is meant by saying that the potential difference between two points is 1 V?
What is the SI unit of potential difference?
Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.
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 1 C passes through it?
Define the term ‘volt’.
The voltage across a 3Ω resistance is 6 V. How large is the current? What is
the resistance of a filament lamp when a voltage of 3 V across it causes a
current of 0.5 A?
Write an expression for the electrical power spent in flow of current through a conductor in terms of current and resistance.
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 |
Potential near a charge is the measure of its ______ to bring a positive charge at that point.
