Semester 2 Physics ACP

You’re given 5 different materials to test for conductivity in a circuit. Which of the following is going to happen?

• Copper, iron and brass will light up because of high mobility electrons and high conductivity

• Copper, glass and brass will NOT light up due to high mobility protons and low conductivity

• Wood, iron and glass will light up because of high mobility electrons and high conductivity

• Glass and wood will NOT light up due to high mobility protons and low conductivity

What device is shown in the picture?

• Generator

• Motor

• Transformer

• Circuit

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

A wire loop is located in a magnetic field. When an electric current is made to flow through the loop, the loop rotates 90 degrees and then stops. This effect is the basis of what device?

• Generator

• Motor

• Transformer

• Resistor

Tags

NGSS.HS-PS2-5

What is the total resistance of each of the following circuits?

• Circuit A: R_T = 11 Ω

  Circuit B: R_T = 0.95 Ω

• Circuit A: R_T = 11 Ω

  Circuit B: R_T = 1.05 Ω

• Circuit A: R_T = 0.95 Ω

  Circuit B: R_T = 11 Ω

• Circuit A: R_T = 11 Ω

  Circuit B: R_T = 11 Ω

What’s the current that flows from the battery?

• 11.25 A

• 1.8 A

• 0.625 A

• 2.25 A

What is the transfer of electricity in a motor?

• chemical to mechanical 
• electrical to mechanical
• mechanical to electrical 
• physical to potential 

Tags

NGSS.HS-PS3-3

What do you need to turn an iron nail into an electromagnet?

• Battery and string

• Battery, pencil and wire

• Battery and wire

• Peanut butter, lampshade, hand sanitizer

Tags

NGSS.HS-PS2-5

How could the experimenter induce more current in this experiment?

• Increase the number of coils

• Decrease the number of coils

• Flip the magnet around

• Move the magnet faster

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Why did this simple electric motor work?

• The current from the battery induces a magnetic field in the copper loop, turning it into an electromagnet that repels from/attracts to the permanent magnet

• The electromagnet on top of the battery pulls on the magnetic copper wire

• The magnet induces a current in the copper loop which makes it rotate.

• The magnetic field from the battery induces an electric current in the copper loop, turning it into an electromagnet that repels from/attracts to the permanent magnet

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

You know this substance is magnetized because

• all the domains have right angles
• the arrows are drawn in red
• the domains are aligned
• the domains are random