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प्रश्न
Which of the following statements correctly defines a volt?
(a) a volt is a joule per ampere.
(b) a volt is a joule per coulomb.
उत्तर
A volt is a joule per coulomb.
The potential difference between two points is said to be 1 volt if 1 joule of work is done in moving 1 coulomb of electric charge from one point to another.
1 volt = 1 joule / 1 coulomb
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संबंधित प्रश्न
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?
The p.d. across a lamp is 12 V. How many joules of electrical energy are changed into heat and light when: a current of 2 A flows through it for 10 s?
What is Ohm's law? Explain how it is used to define the unit of resistance.
Write down the formula which states the relation between potential difference, current, and resistance.
100 joules of heat is produced per second in a 4 ohm resistor. What is the potential difference across the resistor?
How is the electric potential difference between the two points defined? State its S.I. unit.
Exercise.
Calculate the amount of charge that would flow in 2 hours through an element of an electric bulb drawing a current of 2.5 A.
100 J of heat is produced each second in a 4 Ω resistor. The potential difference across the resistor will be:
______ is work done per unit charge.
