Magnetism

Generators are devices that convert _____ energy into _____ energy.

• chemical; mechanical
• mechanical; electrical
• electrical; mechanical
• potential; kinetic

Tags

NGSS.HS-PS3-3

Electric motors are devices that convert _____ energy into  _____ energy.

• electrical; mechanical
• mechanical; electrical
• chemical; potential
• mechanical; kinetic

Tags

NGSS.HS-PS3-3

What is created when a wire moves between the poles of a magnet?

• A. a ferromagnet
• B. a solenoid
• C. an electromagnet
• D. an electric current

Tags

NGSS.HS-PS2-5

This is an example of...

• attraction
• repulsion

Tags

NGSS.MS-PS2-3

Which of the following is a step-up transformer?

• first coil--9 wraps; second coil--3 wraps 
• first coil--8 wraps; second coil--7 wraps
• first coil--7 wraps; second coil--8 wraps
• first coil--6 wraps; second coil--6 wraps 

A hydroelectric plant in Niagara Falls sends 3000 V to the transformer in a substation that steps it up to 120000 V for transmission to homes in New York City. If the primary coil contains 2000 turns, how many turns are there in the secondary coil of the step-up transformer?

• 180000 turns

• 80000 turns

• 2000000 turns

• 3600 turns

Magnetism is generated by moving

• protons.
• electrons.
• neutrons.
• elements.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What do the lines around this magnet represent?

• North Pole
• South Pole
• Magnetic Declination
• Magnetic Field

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

If you cut a magnet in half, what happens to the poles?

• One half gets the North Pole, the other half gets the South Pole
• Both halves get only a North Pole
• Both halves get only a South Pole
• Both halves get a North pole and a South Pole

Which direction is the magnetic field of this electromagnet pointing?[Use a right hand rule to answer.]

• Up & down

• Left & right, perpendicular to coils

• diagonally like an "X"