Unit 5 Practice-SPS 10

A student is planning an experiment using a nail, wire, and a battery to investigate the factors that affect and do not affect the strength of an electromagnet. Which factor would NOT affect the strength of the electromagnet?

• the kind of metal used for the nail in the electromagnet

• the amount of current flowing through the electromagnet

• the number of coils of wire used in the electromagnet

• the direction of the current flowing through the electromagnet

Tags

NGSS.HS-PS2-5

A student creates an electromagnetic wave and then reverses the direction of the current. Which of the following will happen to the magnetic field?

• The direction of the magnetic field will reverse.

• The magnetic field will expand.

• The magnetic field will be cancelled out and disappear.

• The magnetic field will cause the voltage of the battery to be reduced.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

The diagram to the left shows three light bulbs connected in a parallel circuit with an open switch. Which light bulb will be turned off by the opened switch?

• Light bulb 1

• Light bulb 2

• Both light bulbs 2 and 3

• Both light bulbs 1 and 2

Three light bulbs are connected in a series, as shown in the diagram. After the circuit is completed, the middle light bulb breaks. What will happen to the remaining light bulbs?

• Both of the remaining light bulbs will go out.

• Both of the remaining light bulbs will stay lit.

• Only the light bulb closest to the positive end of the battery will stay lit.

• Only the light bulb closest to the positive end of the battery will go out.

The relationship between voltage (V), current (I), and resistance (R) is shown in the equation. V= IR Which of the following graphs BEST represents the relationship between current and voltage when the resistance remains constant?

• 
• 
• 
• 

What happens to the current flowing through a circuit as resistance increases?

• It increases.

• It decreases.

• It stays the same.

• It reverses direction.

What is a measure of how much work is needed to move a charge from one point to another?

• amperage

• resistance

• electric current

• voltage

What is the current flowing through a 120 volt toaster that has a resistance of 24 ohms?

• 0.20 amperes

• 5.0 amperes

• 24 amperes

• 96 amperes

The diagram shows four different circuits. Which circuit will stop producing light if one bulb burns out?

• Circuit 1

• Circuit 2

• Circuit 3

• Circuit 4

Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of the following would increase the strength of the magnetic field produced?

• Doubling the number of times the wire wraps around the nail.

• Changing the battery to a 3.0V battery.

• Reversing the direction of the current flow.

• Replacing the iron nail with one made of plastic.

Tags

NGSS.HS-PS2-5