Chapter 12 The Boy Who Harnessed the Wind

Front

What is a dynamo?

Back

A dynamo is a device that converts mechanical energy into electrical energy, typically producing direct current (DC).

Front

What is the difference between AC and DC power?

Back

AC (Alternating Current) power changes direction periodically, while DC (Direct Current) power flows in one direction only.

Front

What does 'engrossed' mean?

Back

Engrossed means being completely involved or absorbed in something.

Front

How can wind energy be harnessed?

Back

Wind energy can be harnessed using windmills or turbines that convert wind movement into mechanical energy, which can then be converted into electricity.

Front

What is a step-up transformer?

Back

A step-up transformer is an electrical device that increases the voltage from the primary coil to the secondary coil.

Front

What materials can be used to create a transformer?

Back

Common materials include sheet iron for the core and copper wire for the coils.

Front

What is the purpose of a battery in a circuit?

Back

A battery stores electrical energy and provides a source of power for electrical devices.

Front

How do you charge a cell phone using a windmill?

Back

You can charge a cell phone using a windmill by connecting the windmill to a dynamo that generates electricity, which is then used to charge the phone.

Front

What is the role of a generator?

Back

A generator converts mechanical energy into electrical energy, providing power for various devices.

Front

What is the significance of the E shape in transformers?

Back

The E shape in transformers helps to create a magnetic field that efficiently transfers energy between the coils.