Quiz sobre Energia Elétrica

What is electrical energy?

• The force that moves cars.

• The energy generated from the movement of electrons.

• The light emitted by lamps.

• The energy generated by the heat of the sun.

What is the main source of electrical energy in Brazil?

• Solar energy.

• Nuclear energy.

• Hydroelectric energy.

• Wind energy.

What is the unit of measurement for electric current?

• Volts (V).

• Amperes (A).

• Watts (W).

• Ohms (Ω).

What is the main difference between direct current (DC) and alternating current (AC)?

• DC changes direction constantly, while AC flows in one direction.

• AC is used only in batteries, while DC is used in the power grid.

• DC flows in one direction, while AC changes direction periodically.

• AC is safer than DC.

What is a transformer?

• A device that stores electrical energy.

• A device that converts electrical energy into mechanical energy.

• A device that alters the voltage of electrical energy.

• A device that measures electric current.

What does energy efficiency mean?

• The ability to produce more electrical energy.

• The use of devices that consume less energy to perform the same task.

• The amount of energy stored in a battery.

• The conversion of mechanical energy into electrical energy.

How does a battery generate electricity?

• Through the combustion of internal materials.

• Through the conversion of light energy into electrical energy.

• Through chemical reactions between internal materials.

• Through the movement of magnets around copper wires.

What is the main difference between a battery and a cell?

• Cells are rechargeable and batteries are not.

• Cells have a single cell, while batteries have multiple cells.

• Batteries are smaller than cells.

• Cells can only be used in small electronic devices.

Why is it important to dispose of batteries and cells properly?

• Because they can cause explosions if disposed of improperly.

• Because they contain toxic materials that can contaminate soil and water.

• Because they no longer work if disposed of.

• Because it is illegal to throw them in regular trash.

What is the main component of a lithium-ion battery?

• Copper.

• Zinc.

• Lithium.

• Lead.