Interconversion of Energy

Q.

What is the working principle of a mixer and grinder?

Q.

Which of the following energy transformation takes place in a toaster?

1. $Solarenergy\to Electricalenergy$

2. $Electricalenergy\to Heatenergy$

3. $Electricalenergy\to Lightenergy$

4. $Lightenergy\to Heatenergy$

Q.

Which of the given device(s) converts chemical energy to electrical energy?

1. Electric motor

2. Battery

3. Human Body

4. Electric fan

Q.

Which among the following energy conversion takes place while lighting a matchstick?

1. $Soundenergy\to Heatenergy+Lightenergy$

2. $Heatenergy\to Chemicalenergy+Lightenergy$

3. $Chemicalenergy\to Heatenergy+Lightenergy$

4. $Electricalenergy\to Chemicalenergy+Lightenergy$

Q.

State the energy change in a petrol engine of a running car.

Q.

Give an example of the following conversion :
(a) Kinetic energy into heat energy.
(b) Muscular energy into kinetic energy.
(c) Chemical energy into sound, heat and light energy.

Q.

Which among the following energy conversion takes place in an electric motor?

1. $Heatenergy\to Mechanicalenergy$

2. $Electricalenergy\to Mechanicalenergy$

3. $Electricalenergy\to Lightenergy$

4. $Mechanicalenergy\to Electricalenergy$

Q.

Which of the following energy conversion takes place while working with a mixer grinder?

1. Electrical energy to light energy

2. Light energy to mechanical energy

3. Electrical energy to mechanical energy

4. Heat energy to mechanical energy

Q.

State the type of transformation of energy in the case of a light bulb.

Q.

Identify energy transformation in the following:

1. Hydro-electric power,
2. Battery,
3. Stretched bow with an arrow,
4. Explosion of a cracker.
5. Oscillating pendulum,
6. Hammering a mail.

Q.

Which of the following is the correct order of energy changes in the above circuit?

1. $Chemicalenergy\to Heatenergy\to Lightenergy$

2. $Mechanicalenergy\to Thermalenergy\to Chemicalenergy$

3. $Chemicalenergy\to Electricalenergy\to Lightenergy$

4. $Electricalenergy\to Chemicalenergy\to Lightenergy$

Q.

A device "X" converts the electrical energy into mechanical energy and energy "Y". Identify 'X' and 'Y' from the below-mentioned options.

1. X:- Electric generator

   Y:- Light energy

2. X:- Electric motor

   Y:- Heat energy

3. X:- Electric motor

   Y:- Light energy

4. X:- Electric generator

   Y:- Heat energy

Q.

A device "X" converts the electrical energy into mechanical energy and the other device "Y" converts mechanical energy into electrical energy. Identify the devices X and Y.

1. X:- Hand blender

   Y:- Mixer grinder

2. X:- Electric fan

   Y:- Electric generator

3. X:- Electric toaster

   Y:- Mixer grinder

4. X:- Electric generator

   Y:- Electric motor

Q.

Which among the following energy transformation takes place when an automobile moves?

1. $Electricalenergy\to Lightenergy\to Mechanicalenergy$

2. $Electricalenergy\to Heatenergy\to Mechanicalenergy$

3. $Chemicalenergy\to Heatenergy\to Mechanicalenergy$

4. $Heatenergy\to Chemicalenergy\to Mechanicalenergy$

Q.

Energy 'X' is used to operate the loudspeaker and this energy 'X' is converted to the output required i.e. energy 'Y'. Identify X and Y from the below-mentioned options.

1. X:- Electrical energy

   Y:- Sound energy

2. X:- Light energy

   Y:- Sound energy

3. X:- Electrical energy

   Y:- Light energy

4. X:- Sound energy

   Y:- Electrical energy

Q.

Define a source of energy.

Q.

State whether the following statement is true or false

The energy stored in a firecracker is in the form of heat energy.

1. True
2. False

Q.

Energy "X" is the input to the microphone which converts it to energy "Y". Identify X and Y from the options mentioned below.

1. X:- Electrical energy

   Y:- Heat energy

2. X:- Sound energy

   Y:- Electrical energy

3. X:- Sound energy

   Y:- Heat energy

4. X:- Electrical energy

   Y:- Sound energy

Q.

how does the sun burn in the space even though there is no oxygen in space

Q.

Observe the given image carefully and write the energy transformation taking place.

Q. The diagram shows a match.
By striking the match, a chemical reaction takes place.

1. Endothermic because energy is given out as the match burns
2. Endothermic because energy is used to strike the match
3. Exothermic because energy is used to strike the match
4. Exothermic because energy is given out as the match burns

Q.

Which of the following energy conversion takes place during photosynthesis?

1. Solar energy to heat energy

2. Solar energy to chemical energy

3. Light energy to heat energy

4. Light energy to chemical energy

Q.

Which of the following energy conversions take place when a bulb glows?

1. Heat energy to electrical and light energy

2. Light energy to heat and electrical energy

3. Sound energy to heat and light energy

4. Electrical energy to heat and light energy

Q.

A battery converts chemical energy into

1. mechanical energy

2. solar energy

3. electrical energy

4. none of these