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प्रश्न
Define electric potential and potential difference.
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उत्तर
- Electric Potential: The electric potential at a point is defined as the amount of work done in moving a unit positive charge from infinity to that point against the electric force.
- Electric Potential Difference: The electric potential difference between two points is defined as the amount of work done in moving a unit positive charge from one point to another point against the electric force.
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संबंधित प्रश्न
You have three resistors of values 2Ω, 3Ω and 5Ω. How will you join them so that the total resistance is more than 7Ω?
1) Draw a diagram for the arrangement
2) Calculate the equivalent resistance.
How much work is done when one coulomb charge moves against a potential difference of 1 volt?
Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.
Name a device which helps to maintain potential difference across a conductor (say, a bulb).
Keeping the potential difference constant, the resistance of a circuit is doubled. The current will become:
How is the electric potential difference between the two points defined? State its S.I. unit.
Write an expression for the electrical power spent in flow of current through a conductor in terms of resistance and potential difference.
Conceptual question.
A bird sitting on a high power electric line is still safe. How?
A boy records that 4000 joules of work are required to transfer 10 coulombs of charge between two points of a resistor of 50 Ω. The current passing through it is:
