Angel DeAbreu science quizzizz

What does the core of an electromagnet do?

• It produces the electric current that passes through the wire coil.

• It attracts magnets to make a even bigger magnet.

• It produces a magnetic field that adds to the overall magnetic filed of the EM.

What energy transformation makes a motor work?

• Electrical to mechanical energy
• Mechanical to electrical energy
• Chemical to mechanical energy
• Thermal to electrical energy

What energy transformation makes a generator work?

• Mechanical to electrical energy
• Thermal to mechanical energy
• Chemical to electrical energy
• Electrical to mechanical energy

What can you do to increase the force produced in

a motor?

• Increase current or increase number of turns in the coil
• Increase voltage or increase the size of the motor.
• Decrease resistance or increase the speed of the motor.
• Add more magnets or increase the size of the motor.

What are the advantages to using electricity to produce magnetism?

• Limited control of strength and direction, difficult to turn on/off, requires batteries.
• Control of strength and direction, easy on/off, no need for permanent magnets

How can you increase the electricity

produced in a generator?

• Increase rotational speed or magnetic field strength
• Decrease the temperature of the generator

What is an electromagnet?

• A type of magnet produced by a chemical reaction.
• A type of magnet produced by a static charge.
• A type of magnet produced by an electric current.

How is a electromagnet made?

• By wrapping a coil of wire around an iron core and passing an electric current through the wire.
• By wrapping a coil of wire around a copper core and passing an electric current through the wire.
• By wrapping a coil of wire around a wooden core and passing an electric current through the wire.
• By wrapping a coil of wire around a plastic core and passing an electric current through the wire.

How is a motor made?

• A motor is made by assembling various components such as a rotor, stator, bearings, and housing.
• A motor is made by using a single piece of metal and shaping it into the desired form.
• A motor is made by pouring liquid metal into a mold and letting it cool.

What is the law of conservation of energy?

• Energy cannot be created or destroyed, only transformed.
• Energy can be both created and destroyed.
• Energy can be destroyed but not created.
• Energy can be created but not destroyed.