Question

According to the Video, how can you change the polarity of electromagnets?

a
By increasing the voltage
b
By adding more coils
c
By having a thicker wire
d
By changing the direction of the current
Question 2 (1 point)
According to the Video, what is the measure of the rate of flow of the electrons?

a
Speed
b
Current
c
Power
d
Velocity
Question 3 (1 point)
According to the Video, what makes a wire magnetic when you run electricity through it?

a
It makes the domains opposite and polar
b
It causes a swirling of the electrons to give it a magnetic field
c
It allows for the metal to become a magnet
d
It makes the domains align
Question 4 (1 point)
According to the Video, which of the following is NOT a way to increase the strength of an electromagnet?

a
Increase the voltage
b
Switch the direction of the current
c
Having a soft iron core
d
Increase number of coils
Question 5 (1 point)
According to the Video, when Mrs. Aguirre did the virtual lab, how many paper clips did they pick up when they used the lowest number of coils?

a
2
b
1
c
3
d
0
Question 6 (1 point)
According to the Video, when Mrs. Aguirre did the Virtual Lab, why did she only change one thing at a time before doing a new test?

a
Because if you test multiple things your results will never change.
b
Because you want to be able to see if the change you made is the reason you had a change in results.
c
Because testing things only once gives valid scientific results.
d
Because it's too difficult to change more than one thing at a time for the program.
Question 7 (1 point)
According to the Video, when Mrs. Aguirre did the Virtual Lab, when she had 5 coils and 5 batteries, how many paper clips did she pick up?

a
1
b
3
c
5
d
8
Question 8 (1 point)
Accordinng to the Video, when Mrs. Aguirre did the virtual lab, how many paper clips did she pick up when they had 9 coils and 5 batteries?

a
1
b
3
c
8
d
5
Question 9 (1 point)
According to the Video, when Mrs. Aguirre did the virtual lab, why did the plastic not work?

a
Because the wire needs to connect at the ends.
b
Because it is an insulator.
c
Because it is a conductor.
d
Because it needs more coils.
Question 10 (1 point)
According to the Video, which of the following is NOT an example of an Electromagnets given?

a
Desk Lamp
b
Computer hard drives
c
Electric Motors
d
Speakers

Answer 1

1. d
2. b
3. b
4. b
5. d
6. b
7. b
8. c
9. b
10. a