Voltage

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

1. ampere.

2. volt.

3. joule.

4. 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;

1. 2 I

2. 4 I

3. I/2

4. 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. is the amount of work done to move a unit positive charge from one point to another point.

1. Potential difference
2. Resistivity
3. Amplitude
4. 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:

1. 132 mJ
2. 415 mJ
3. 825 mJ
4. 1650 mJ

Q.

The practical unit of electric potential is

1. J.C^-1

2. J×C

3. C.J^-1

4. 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:

1. e.m.f

2. p.d

3. terminal voltage

4. both (a) and (b)

Q.

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

1. False

2. True

Q.

The potential difference across a resistance is equal to the ___ measured across it.

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?

1. 4000 V

2. 12000 V

3. 1333.33 V

4. 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___.

1. 0.5 ohm resistor and 20 A current

2. 0.5 ohm resistor and 2 A current

3. 5 ohm resistor and 20 A current

4. 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

1. volt

2. joule

3. ampere

4. coulomb

Q.

The SI unit of electric current is

1. Ampere

2. Joule

3. Coulomb

4. Metre