Electrostatic Potential and Potential Difference

Q.

Calculate the number of electrons constituting one coulomb of charge.

Q.

Who invented electricity?

Q.

What is work done in current electricity?

Q.

In which direction does the conventional current flow through an electric circuit?

Q. If 50J of work must be done to move an electric charge of 2C from a point, where potential difference is -10V to another point where potential is V volt. Then the value of V is?

Q. A capacitor of capacitance 6mf is charged to a potential of 150 V. Its potential falls to 90 V, when another capacitor is connected to it. Find the capacitance of the second capacitor and the amount of energy lost due to the connection.

Q. An electron carries charge of magnitude coulomb.

1. positive
2. negative
3. $1.60\times {10}^{-19}$
4. $1.672\times {10}^{-31}$

Q. IF 50 JOULE OF WORK MUST BE DONE TO MOVE AN ELECTRIC CHARGE OF 2C FROM A POINT WHERE POTENTIAL IS -10 V ANOTHER POINT WHERE POTENTIAL IS V VOLT .THEN THE VALUE OF V IS.

Q.

State whether the given statement is true or false:

A battery may have more than one cells connected in series.

1. True

2. False

Q. 3.For depositing 1 g of an element in a voltmeter 3 A current for 4 minutes is required. To deposit same mass a current of 8 A will be required for 1. 1 minute 2. 2 minute 3. 1.5 minute 4. 3 minute

Q. The cell or battery, that could store electric charge was invented by the well-known scientist .

1. Andre-Marie Ampere
2. Alessandro Volta
3. Henry Cavendish

Q. The source for electricity to run electrical equipments in a fuel car is called a battery, not a cell.

1. True
2. False

Q.

The source of electric current for hand held transistor is ______.

Q.

What is the conventional direction of an electric current?

Q. The unit of potential difference is .

1. volt
2. watt
3. ampere

Q.

What is the Schwinger Effect?

Q.

A cation can never have the following magnitude of charge.

1. 1.6×10 ^-19 coulomb

2. 2.46×10 ^-19 coulomb

3. 3.2×10 ^-19 coulomb

4. 4.8×10 ^-19 coulomb

Q. What happens to electricity at the city substation?

1. It is stepped up to 132 kV
2. It is stepped down to 33 kV
3. It is stepped down to 220 V
4. It is stepped down to 11 kV

Q.

Flow of electric charge?

Q.

What is the symbol of cell and battery?

Q.

What is meant by an electric current ?

Q.

If the work done to transfer 10C of charge between two bodies A and B is 10 joules then find the potential maintained between them.

1. 20V

2. 100V

3. 1V

4. 0V

Q. The atmospheric air, naturally and typically acts as .

1. a conductor
2. an insulator
3. charge carrier

Q. Which of the following represents the units of current and potential difference respectively?

1. Volt, Joule
2. Volt, Ampere
3. Ampere, Coulomb
4. Ampere, Volt

Q.

What is the base unit of electrical current?

1. Joule

2. Ohm

3. Mho

4. Ampere

Q. A 4µF capacitor is charged by a 200V supply. The supply is then disconnected and the charged capacitor is connected to another uncharged 2µF capacitor. How much electrostatic energy of the first capacitor is lost in the process of attaining the steady situation?

Q. The term in electricity is used to represent flow of charges.

1. water
2. current
3. voltage
4. potential difference

Q. As the height of a substance or a body is increased with respect to Earth, the body gains more energy.

1. potential
2. kinetic
3. thermal

Q. Potential difference is created in an electric circuit due to ______________.

1. voltmeter
2. electric cell
3. bulb
4. conductor

Q.

A battery may have one or more than one cell connected in series.

1. True

2. False