Name the form of energy that is converted to another form of energy in various instruments mentioned in the table below? S. No. Name of instrument Transformation Energy converts from Energy converts to 1. Electric Iron (Press) 2. Dynamo 3. Photocell 4. Electric Pump 5. A winded clock 6. Cell 7. Catapult 8. Hydroelectric plant

Energy gets always transferred from one form to another. Electrical iron is one such equipment where electrical energy gets converted into heat energy. Dynamo is commonly used in a power station to generate electricity. The change in the magnetic field produces current. Thus, in this equipment, mechanical energy gets converted into electrical energy. Photocell absorbs energy from the sun and converts into electrical energy. Thus, in this device, light energy gets transformed into electrical energy. These kinds of cells are used as a source of electricity in satellites. In an electrical pump, the electrical energy gets converted into potential energy. In a wind clock, a certain amount of work has to be done mechanically to wind the key in the clock. This energy required to wind the key is the mechanical energy, and it gets converted into potential energy as the mechanical energy given remains in the clock in a stored form. Cells or batteries have chemicals stored in it. With the chemical reaction taking place in the cells, the energy released is used and is converted into electrical energy. Thereby it can glow the bulb connected to it. A stone on a stretched catapult has energy stored in it in the form of potential energy. When this stretched catapult is left, the potential energy gets converted into kinetic energy when the stone starts to move. The hydroelectric plant is where, the electricity is being generated. In this plant, the water is stored possess potential energy which then converts into electrical energy. S. No. Name of instrument Transformation Energy converts from Energy converts to 1. Electric Iron (Press) electrical energy heat energy 2. Dynamo mechanical energy electrical energy 3. Photo cell light energy electrical energy 4. Electric Pump electrical energy potential energy 5. A winded clock mechanical energy potential energy 6. Cell chemical energy electrical energy 7. Catapult potential energy kinetic energy 8. Hydroelectric plant potential energy electrical energy

E M B I B E

SCIENCE & TECHNOLOGY CLASS - 6>Chapter 11 - Work, Energy and Machines>ANSWER THESE>Q 3

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6th Chhattisgarh Board

IMPORTANT

Earn 100

The units of energy and work are the same. Why?

Important Questions on Work, Energy and Machines

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6th Chhattisgarh Board

IMPORTANT

SCIENCE & TECHNOLOGY CLASS - 6>Chapter 11 - Work, Energy and Machines>ANSWER THESE>Q 4

Write two examples each of work done by heat energy, mechanical energy and electric energy.

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6th Chhattisgarh Board

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SCIENCE & TECHNOLOGY CLASS - 6>Chapter 11 - Work, Energy and Machines>ANSWER THESE>Q 5

Compute the work done in joules if a five Newton force is applied to move a table by two metres.

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6th Chhattisgarh Board

IMPORTANT

SCIENCE & TECHNOLOGY CLASS - 6>Chapter 11 - Work, Energy and Machines>Exercise 2>Q 1

Name the form of energy that is converted to another form of energy in various instruments mentioned in the table below?

S. No.	Name of instrument	Transformation
S. No.	Name of instrument	Energy converts from	Energy converts to
1.	Electric Iron (Press)
2.	Dynamo
3.	Photocell
4.	Electric Pump
5.	A winded clock
6.	Cell
7.	Catapult
8.	Hydroelectric plant