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प्रश्न
What does the positive and negative sign of potential convey?
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उत्तर
The positive sign of potential conveys that work has to be done on the positive test charge against the repulsive force due to the positive charge in bringing it from infinity. The negative sign of potential conveys that work is done on the negative test charge by the attractive force.
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संबंधित प्रश्न
State whether the resistivity of a wire changes with the change in the thickness of the wire.
What is meant by saying that the electric potential at a point is 1 volt?
How much work is done in moving a charge of 2 C across two points having a potential difference of 12 V?
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?
The other name of potential difference is:
A current of 0.2 A flows through a wire whose ends are at a potential difference of 15 V. Calculate:
(i) The resistance of the wire, and
(ii) The heat energy produced in 1 minute.
Point out two differences between e.m.f. and potential difference as applied to electric circuits.
Twenty-seven drops of the same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.
