Electromagnetism Quiz

What does an electromagnet turn electrical energy into?

• Heat energy

• Magnetic field

• Light energy

• Chemical energy

How does an electromagnet differ from a regular magnet?

• It cannot be turned off

• It uses mechanical energy

• Its magnetic force is adjustable and can be turned on and off

• It does not use electricity

What happens to the electrons in the metal when an electromagnet is activated?

• They are removed from the metal

• They remain static

• They line up and create a magnetic effect

• They convert into protons

What is the main function of the filament in an incandescent light bulb?

• To protect the glass bulb

• To conduct electricity

• To create light through resistance and heat

• To fill the bulb with air

Why is an incandescent light bulb not very efficient?

• It uses too much electricity

• It produces more light than heat

• It converts most of the electrical energy into heat, not light

• It does not use a filament

What happens to the electrical energy in a light bulb?

• It is completely converted into light

• It is stored inside the bulb

• It is mostly converted into heat and a small amount into light

• It escapes as sound energy

What is the primary function of a buzzer or bell as described in the text?

• To light up

• To create sound

• To generate heat

• To move objects

How does a buzzer or bell use electrical energy according to the explanation?

• Converts it directly into light

• Converts it into mechanical energy only

• Converts it into magnetic energy and sound energy

• Stores it as chemical energy

What happens when the switch in a buzzer or bell circuit is activated?

• The circuit remains closed

• The magnet turns off, opening the circuit

• The magnet turns on, closing the circuit

• The electrical energy is converted to light

What is attached to an axle in a motor to create movement?

• A battery

• An electromagnet

• A light bulb

• A switch