2020 VCE 12 Unit 4 Systems Pretest

Bob made an electromagnet but it was very weak.  How can he make it stronger?

• take away a d-cell
• wrap the wire loosely
• use thicker wire
• use less winds

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

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

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

Tags

NGSS.MS-ETS1-2

NGSS.MS-PS2-3

Why are paper clips attracted to magnets?

• They contain silver.
• They contain aluminum
• They contain tin.
• They contain iron. 

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Why might a current-carrying wire be placed between a magnetic field?

• To increase the current from the interaction of magnetic fields

• To increase the voltage from the interaction of magnetic fields

• To produce a force from the interaction of magnetic fields

Tags

NGSS.HS-PS2-5

Give two ways you can reverse the direction of a basic dc motor?

• Reverse the current

• Keep the current the same

• Reverse the magnetic field

• Keep the magnetic field the same

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

this is the symbol for a _____?

• switch
• light 
• battery
• wires

Tags

NGSS.HS-PS2-5

what is this symbol for?

• light bulb
• cell
• battery
• resistor

Tags

NGSS.MS-PS2-3

This is the symbol for a ...

• Bulb
• Battery
• Horn
• Fuse

Tags

NGSS.HS-PS2-5

This is the circuit symbol for ...

• an AC current source
• a DC current source
• an ammeter
• a voltmeter

This is the circuit symbol for ...

• an AC current source
• a DC current source
• an ammeter
• a voltmeter