# Voltage

## Trending Questions

**Q.**

What is the relationship between the charge and the current which are flowing through the conductor in time $t$?

**Q.**

The SI unit of electric potential is

ampere.

volt.

joule.

ohm.

**Q.**

A charge of $3C$ is moved in an electric field from infinity to two points A and B. If the work done in bringing the charge to point A is $15J$ and in bringing it to point B is $21J$, calculate the potential difference between points A and B.

**Q.**

Define electron volt and express it in joules

**Q.**

How much work is done when one coulomb charge moves under a potential difference of 1 volt?

**Q.**

The potential difference of a circuit is constant. If the resistance of a circuit is doubled, then its current will become;

2 I

4 I

I/2

I

**Q.**

By what name (single word) is joule/coulomb called?

**Q.**

Define one volt. Give the electrical relationship between electrical work done, charge and potential.

**Q.**

An amount of 250 joules of work done in transferring 20 coulombs of charge from one terminal of a battery to another. What is the potential difference between the two terminals of the battery?

**Q.**

$20coulombs$ of charge flows through any cross-section of a conductor in $10seconds$. What is the current flowing through the conductor?

**Q.**

- Potential difference
- Resistivity
- Amplitude
- Capacitance

**Q.**

$40coulombs$ of charge is brought from infinity to a given point in an electric field when $60joules$ of work is done. What is the potential at that point?

**Q.**

The voltage of a battery is 10 V. Find the amount of work done to transfer a charge of 20 C from one terminal to the other.

**Q.**

What is meant by the statement, Potential difference between points A and B in an electric field is $1volt$?

**Q.**

A battery of $12V$ supplies a charge of $1000C$ to an electric device. How much work is done by the battery in moving the charge?

**Q.**

Define electric potential. State its practical unit and define it.

**Q.**The amount of work done in moving an electric charge of 2.5 C over a P.D. of 330 mV is:

- 132 mJ
- 415 mJ
- 825 mJ
- 1650 mJ

**Q.**

The practical unit of electric potential is

J.C

^{-1}J×C

C.J

^{-1}J/C

**Q.**

When the current is drawn from a cell in a closed circuit, the potential difference between the terminals of the cell is called:

e.m.f

p.d

terminal voltage

both (a) and (b)

**Q.**

EMF of a battery is equal to the voltage across it when it is not in circuit.

False

True

**Q.**

The potential difference across a resistance is equal to the

**Q.**

A resistor of resistance value equal to 4 kilo ohm is placed in a circuit and a current of 3 A flows through it. What is the voltage accross the resisitor?

4000 V

12000 V

1333.33 V

None of the above

**Q.**

When an electric circuit is completed and closed, what causes the current to flow in it?

**Q.**

What is the unit of potential difference?

**Q.**

To have a 10 V potential difference, we need

0.5 ohm resistor and 20 A current

0.5 ohm resistor and 2 A current

5 ohm resistor and 20 A current

0.5 ohm resistor and 20 mA current

**Q.**

units of potential difference in cgs and mks system.

**Q.**

A home electric appliance works on 220V potential. Calculate the work in carrying 20 coulombs of charge through this appliance.

**Q.**

What is the work done in moving a charge of $\mathrm{Q}$ coulombs against a potential difference of $\mathrm{V}$ volts?

**Q.**

The SI unit of current is

volt

joule

ampere

coulomb

**Q.**

The SI unit of electric current is

Ampere

Joule

Coulomb

Metre