Electrical Energy

Q.

Differentiate between electrical energy and chemical energy

Q.

Which of the following particle is responsible for the electric current in a wire?

1. Neutron

2. Positron

3. Proton

4. Electron

Q.

Question 7

Would the bulb glow in the circuit shown in Fig.

Q.

Which of the two requires an electric cell for its working : a Quartz clock or a pendulum clock??

Q. Electric bell works on what principle?

1. Electrical energy is converted into sound energy

2. Mechanical energy is converted into sound energy

3. Electrical energy is converted into mechanical energy

4. Mechanical energy is converted into electrical energy

Q.

State the principle of transformation of energy. Give at least two examples to illustrate it.

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

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

Q. Protons and electrons are and charged particles respectively.

1. neutrally
2. magnetically
3. negatively
4. positively

Q.

In an electric circuit, the current flows from the _________.

1. negative terminal to the positive terminal

2. negative terminal to the neutral terminal

3. positive terminal to the negative terminal

4. positive terminal to the neutral terminal

Q.

An electric bulb will glow only when the circuit ______.

1. Current flows through the circuit

2. All of these

3. Electric circuit is incomplete

4. Electric switch is open

Q. The flows from positive to negative terminal of the battery where as the flow from negative to positive terminal of the battery

1. current
2. electrons
3. voltage
4. protons

Q.

Name the energy changes taking place when the following device is used:Electric bell

Q. In which of the following circuits the bulb will glow?

1. A
2. C
3. D
4. B

Q. In electric bells, electrical energy transform into ............. energy.

1. Mechanical
2. Magnetic
3. Sound
4. Light

Q.

Fans, refrigerators and other appliances use ____ energy to operate.

1. electrical

2. heat

3. chemical

4. nuclear

Q.

Electric bell works on what principle?

1. Electrical energy is converted into sound energy

2. Mechanical energy is converted into sound energy

3. Electrical energy is converted into mechanical energy

4. Mechanical energy is converted into electrical energy

Q. Protons and electrons are and charged particles respectively.

1. neutrally
2. magnetically
3. negatively
4. positively

Q.

Paheli connected two bulbs to a cell as shown in the figure, She found that filament of bulb B is broken. Will bulb A glow in this circuit? Give reason.

\( = \)

Q.

Which among these is an example of electric energy being involved?

1. The energy given off by firing up wood in a fireplace

2. Drinking juice

3. An AC is running in a closed room

4. Using a heavy machine in a factory

Q.

Electrons are _____ particles.

1. neutral

2. positively charged

3. negatively charged

4. infinitely charged

Q.

Select the appropriate electric circuit from the following.

1. 

2. 

3. Both A and B

4. None of these

Q. Protons and electrons are and charged particles respectively.

1. neutrally
2. magnetically
3. negatively
4. positively

Q.

State what happens when you switch off and switch on a circuit?

Q. Which power supply can be used in electric bell

1. $DC$
2. Can't be predicted
3. Both A and B
4. $AC$

Q. A tube light converts electrical energy into :

1. Chemical energy
2. Magnetic energy
3. Mechanical energy
4. Light energy

Q.

State what happens when you switch off and switch on a circuit?

Q. Which of the following energy conversion takes place in an electric bell?

1. Mechanical energy to sound energy
2. Electrical energy to mechanical energy
3. Electrical energy to sound energy
4. Electrical energy to magnetic energy

Q.

Electrical energy is used to run

1. washing machine

2. water coolers

3. both (A) and (B)

Q.

In which of the following case, the flow of electric current will be maximum?

1. When the potential difference across the device is more

2. When the potential difference across the device is less

3. When resistance of the material used is high

4. When there is no potential difference

Q. Match the following devices with their corresponding output form of energy.

1. Speaker
2. Light energy
3. Electric bulb
4. Heat energy
5. Iron box
6. Sound energy