Electromagnetic Forces H

The wire shown carries a current that makes a magnetic field in the space around it. The current in the wire must be running ---.

• to the left

• to the right

• straight out of the page

• This magnetic field cannot be made by a current.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which one of the following pictures correctly shows the compasses placed around a wire that is carrying a strong electric current through it?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Compared to the magnetic field in coil A, the magnetic field in coil B is --- as big.

• 4/3 ×

• 3/4 ×

• 1×

• 8 ×

• 1/6 ×

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

A device that converts mechanical energy into electrical energy

• A. electric generator
• B. electric motor
• C. electromagnetic induction
• D. mechanical  generator

Tags

NGSS.HS-PS3-3

This can did not stick to a magnet. What is it made of?

• iron
• nickel
• aluminum
• cobalt

Tags

NGSS.HS-PS2-5

Electric motors are devices that convert ​ (a)   energy into  ​ (b)   energy. ​

• electrical
• mechanical
• gravitational
• solar

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-5

Which of these is a way to make an electromagnet stronger?​ ​ ​ ​ (a)  

• wrapping the wire around the iron core more
• putting a switch in the electrical circuit
• replacing the copper wire with plastic wire
• replacing the iron core with a copper core

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What must the student do in the picture, in order to induce electric potential and move the needle on the galvonometer?

• nothing

• move the magnet

• add more loops of wire

• unplug the galvnonmeter

Tags

NGSS.HS-PS2-5

How do you increase the strength of an electromagnet?

• add more magnets

• larger core

• increase the number of coils around the core

• salt water

Tags

NGSS.HS-PS2-5

Electromagnetism is when

• magnetism causes electricity

• electricity causes magnetism

• electricity and magnetism cancel each other out

• a strong magnet creates a permanent magnet

Tags

NGSS.HS-PS2-5