Scientifiq - Part 2

Who discovered that electric currents create magnetic fields?

• Albert Einstein

• Hans Christian Ørsted

• Isaac Newton

• Nikola Tesla

Fill in the blank: A ferromagnetic material is a metal or an alloy of metals which can become magnetized under the action of a ________.

• electric current

• magnetic field

• gravitational force

• chemical reaction

What type of energy is transformed into magnetic energy when it passes through an electromagnet?

• Mechanical energy

• Electrical energy

• Sound energy

• Light energy

What happens when you press the button on a remote control for unlocking car doors?

• It sends a signal to the electronic circuit inside the lock.

• It opens the car door automatically.

• It turns off the car engine.

• It activates the car alarm.

In the kitchen, most appliances with an electric motor work with ________.

• batteries

• electromagnets

• solar panels

• wind turbines

What is one industrial use of powerful electromagnets?

• To lift heavy loads

• To power small gadgets

• To heat food

• To generate solar energy

What materials are needed to make an electromagnet?

• Plastic wire

• Copper wire

• Wooden stick

• Rubber band

To safely make an electromagnet, you should disconnect the ______ when not in use.

• wire

• battery

• nail

• paper clip

What is an electromagnet?

• A permanent magnet

• A magnet created by electricity

• A type of battery

• A chemical compound.

In the experiment, if you replace the mounting nail with a wooden stick, the number of paperclips lifted will likely be ____.

• More

• Less

• The same

• Double