Electric Current: Flow of Electrons in Circuit

Q.

What is the difference between absolute and secondary instruments?

Q.

In an electric circuit, the current flows from positive to negative terminal.

1. negative to positive terminal

2. negative to neutral terminal

Q.

What is the principle of a sand clock?

Q.

Question 4

When a switch is in OFF position,
(i) circuit starting from the positive terminal of the cell stops at the switch
(ii) circuit is open
(iii) no current flows through it.
(iv) current flows after some time
Choose the combination of correct answer from the following.

Q.

Question 13 (ii)
In the circuit shown in Fig

What will be the order in which the bulbs A, B and C will glow when the switch is moved to the ‘ON’ position?

Q.

An electric ___ provides the complete path for electricity to pass between the two terminals of an electric cell.

Q.

A telephone network is an example of _________ network

1. Packet switched

2. Circuit switched

3. Message switched

4. None of the above

Q.

Question 13 (i)
In the circuit shown in Fig

Would any of the bulb glow when the switch is in the ‘OFF’ position?

A B C

Q.

The amount of work done to move a unit charge from one point to the other point is called ___.

1. potential difference

2. current

3. resistance

4. charge

Q.

The figure shows four cells fixed on a board. Draw lines to indicate how you will connect their terminals with wires to make a battery of four cells. [1 MARK]

Q.

Which of the following represents the correct symbol for an electric cell?

1. Option D

2. Option C

3. Option A

4. Option B

Q.

Does galvanometer measure voltage?

Q. The electric feild at a point due to a point charge is 30N/C and the electric potential at that point is 15J/C.Calculate the distance of the point from the charge and the magnitude of the charge.

Q.

A small circular thing you push to activate a machine is ___?

Q.

$Ampere-hour$ is a unit of

1. quantity of charge

2. potential

3. energy

4. current

Q.

Why are cathode rays considered to be a stream of electrons?

Q. Which of the following devices can be used to measure electric current in a circuit?

1. Speedometer
2. Voltmeter
3. Ammeter
4. Battery

Q.

Define the term.

Open circuit.

Q.

Potential difference is measured using a _______.

Q.

Electric current is said to be the flow of charge carriers.

1. Protons

2. Neutrons

Q. In a wire, 0.5 C charge flows in 0.5 sec.The magnitude of the current flowing through the conductor will be:

1. 1 A
2. 0.8 A
3. 0.025 A
4. 0.5 A

Q.

What is the SI unit of electric current?

Q.

An electric current of $14A$flows through a conductor for $5s$. Find the amount of charge that flows.

Q.

In charging the battery of a motor car, which of the following effect of electric current is used?

1. Heating

2. Magnetic

3. Chemical

4. Inductor

Q.

$Ampere-hour$ is a unit of

1. Quantity of electricity

2. Strength of electric current

3. Power

4. Energy

Q.

Make a table with the name of three electrical appliances used in your home in one column, their power, voltage rating and approximate time for which each one is used in one day in the other columns.

Q.

What kind of energy is stored in glowing bulb?

Q.

In which of the following circuit will the bulb glow?

1. 

2. 

3. 

4. 

Q.

The combination of two or more cells is called circuit.

1. True
2. False

Q.

State three main properties of electron.