Prctice Quiz: Converters

The hospital still had power during the blackout. What is the most likely reason?

• The hospital was in another town.

• The hospital had its own emergency generator.

• The hospital was not affected.

• Hospitals always work.

Answer explanation

The most likely reason the hospital still had power during the blackout is that it had its own emergency generator. This ensures that critical services can continue even when the main power supply is interrupted.

A generator is a _______ .

• source converter that powers other devices with electricity.

• energy source all on its own.

• an energy converter, like a television or computer.

Answer explanation

A generator is a source converter that powers other devices with electricity, converting mechanical energy into electrical energy, unlike the other options which mischaracterize its function.

The Sun is ______ .

• a source converter that powers other devices with electricity.

• an energy source.

• an energy converter, like a device.

Answer explanation

The Sun is primarily an energy source, providing light and heat through nuclear fusion. It is not a converter or a device that powers other devices; rather, it generates energy that can be harnessed.

Which type of energy converter uses the Sun as its energy source?

• nuclear power plant

• electric car that a regular person can buy

• solar panel

• furnace

Answer explanation

A solar panel is an energy converter that directly uses sunlight to generate electricity, making it the correct choice. In contrast, nuclear power plants, electric cars, and furnaces do not primarily rely on solar energy.

What happened in class when we gave motion energy to the electric motor, instead of giving it electric energy?

• It stopped working.

• It gave out more motion energy.

• It became a generator and gave out electric energy.

Answer explanation

When motion energy was supplied to the electric motor, it operated in reverse, functioning as a generator. This process converted the motion energy back into electric energy, which is why it became a generator.