Magnetism, Electromagnets, and Generators

Magnetism, Electromagnets, and Generators

Multiple Choice

The area of magnetic force around a magnet is known as its _____________.

• Magnetic Field

• Magnetic Fan Lines

• Magnetic Area

• Magnetic Location

Multiple Choice

What will the magnets in the picture do?

• Attract

• Repel

• Neither attract nor repel

• Both attract and repel

Multiple Choice

What will the magnets in the picture do?

• Attract each other

• Repel each other

• Both attract and repel

• Neither attract nor repel

Multiple Choice

Permanent magnets are made out of which materials?

• Cobalt, Nickel, and Iron

• Copper, Chromium, and Cobalt

• Gold, Silver, and Platinum

• Copper, Nickel, and Iron

Multiple Choice

Magnetic fields are strongest _______.

• at both poles

• at the north pole

• at the south pole

• between the poles

Multiple Choice

Opposite charges _____ and like charges ____.

• attract, repel

• repel, attract

Multiple Choice

What component becomes a temporary magnet when electricity is flowing through the circuit?

• iron nail

• copper wire

• battery

• switch

Multiple Choice

An atom is a positively charged nucleus that is orbited by negatively charged _____.

• electrons

• protons

• neutrons

• photons

Multiple Choice

A ____ is a material that allows heat and electricity to pass through it. A ____ is a material that does NOT allow heat and electricity to pass through it.

• Conductor, Insulator

• Insulator, Conductor

Multiple Choice

A _____ is a device that has a magnetic needle that spins freely. It is used for navigation because its needle usually points north.

• calculator

• compass

• GPS

• map

Multiple Choice

A type of magnet that has temporary magnetic effect when electric current flows through it.

This refer to

• Electric

• Electronic

• Electrostatic

• Electromagnet

Multiple Choice

Sophia made an electromagnet but it was very weak. How can she make it stronger?

• take away the battery

• wrap the wire loosely

• use less copper wire

• coiled more copper wire

Multiple Choice

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Remove all the coils and the nail.

• Use a smaller battery.

• Reverse the poles of the magnet.

• Add more coils of wire to the nail.

Multiple Choice

How are electromagnets different from magnets?

• magnets have a North and South pole

• you can turn an electromagnet on/off

• magnets are more powerful

Multiple Choice

Which component provides the energy or the power source to run the electromagnet?

• Iron nail

• wire

• Switch

• Battery

Multiple Choice

What would increase the strength of an electromagnet?

• Changing the direction of the current

• Increased the amount of electricity that flows through the wire.

• Inserting a wooden core inside the coil

• Decreasing the number of coils of wire

Multiple Choice

You can make an electromagnet stronger by: having a __________________core inside the wire.

• smaller core

• larger core

• greener core

• water core

Multiple Choice

What are the components of the electromagnet?

• copper wire, iron nail, and a wooden stick

• copper wire, iron nail

• copper wire, iron nail, and a battery

• Copper wire, paper and a battery

Multiple Choice

Why do you think the compass needle is moving when is near to electromagnet?

• Because of the magnetic field generated in the wire.

• Because of the electricity generated in the compass.

Multiple Choice

What energy source has this energy chain?
light-> electricity

• geothermal
• solar panel
• nuclear
• tidal

Multiple Choice

Which type of energy is represented by a propeller car just before the student lets it go?

• elastic potential energy
• elastic energy
• kinetic energy
• chemical energy

Multiple Choice

What energy type powers a wind turbine?

• kinetic
• elastic
• electrical
• solar

Multiple Choice

In a DC Motor, the coil of the rotor turns into an electromagnet when

• the rotor rotates inside the stator

• electricity (current) flows through the coil

• the rotor is turned by the axle

• the it sits int the field of the stator

Multiple Choice

What device changes electrical energy into mechanical energy?

• carbonic

• piston

• generator

• motor

Multiple Choice

A device that transforms mechanical energy into electrical energy

• capacitor

• generator

• mowtown

• emulator

Multiple Choice

What is the path through which electricity flows?

• circuit

• magnetic field

• resistor

• load

Multiple Choice

Johnny is creating a circuit using a battery, wire and light bulb. He wants to make sure that his circuit works. He connects all of his materials and notices that his light bulb is not lit up. What might be a problem with his circuit?

• Electricity won't flow without a switch

• He made a parallel circuit

• There was a gap in his circuit.

• He made a series circuit

Multiple Choice

What device is made of coils of wire with an electrical current passing through it in order to generate a magnetic field?  

• Electromagnet 
• Generator
• Electron Magnet 
• Motor

Multiple Choice

How are electromagnets different from magnets?

• magnets can be turned on/off
• you can turn an electromagnet on/off
• magnets are more powerful
• magnets have a North and South pole

Multiple Choice

What type of energy comes OUT of a generator?

• Mechanical
• Electrical
• Thermal
• Potential

Multiple Choice

What is the best energy chain for coal fired power plants

• chemical -> kinetic -> electrical
• kinetic -> electrical
• electrical -> chemical -> heat
• kinetic -> chemical -> electrical

Multiple Choice

What is a light bulb considered in a circuit?

• a load/resistor

• conductor

• power source

Multiple Choice

How would a larger core in an electromagnet change its strength?

• The strength would stay the same

• Make it weaker

• Make it stronger

Multiple Choice

Generators are devices that convert _____ energy into _____ energy.

• chemical; mechanical
• mechanical; electrical
• electrical; mechanical
• potential; kinetic

Multiple Choice

In a _______ a spinning turbine moves magnets which generates an electric current.

• Motor

• Generator

Multiple Choice

What can you use to make an electromagnet?

• Battery, nail and string 
• Battery, pencil and wire
• Wire, battery and iron ore (nail)
• Peanut butter, lampshade, hand sanitizer