Magnetism Pt.1

Magnets always have two poles, North and South.

• True

• False

As the magnet passes through the wire loop,

• an electric current is created through the wire

• the wire loop becomes a South Pole

• the magnet changes polarity

• nothing happens

Tags

NGSS.HS-PS2-5

Which diagram below best represents the magnetic field near a bar magnet?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-5

In the right-hand-rule method, your thumb represents the resistance.

• True

• False

Tags

NGSS.HS-PS2-5

What is the direction of the magnetic field above the wire at the triangular point P?

• out of the page at point P

• into the page at point P

• toward the top of the page at point P

• toward the bottom of the page at point P

Tags

NGSS.HS-PS2-5

If the magnet moves toward the center of the coil, the resistor R (lamp)

• will turn on

• will turn off

• will be unpredictable

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

If the magnet is left resting inside the coil, the resistor R (lamp)

• will be on

• will be off

• will be unpredictable

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which diagram best represents the magnetic field near the wire?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

You have an electric generator connected to a bulb, you produced 500J of work on it and the bulb lights up using only 100J. What is the efficiency of this generator?

• 10%

• 20%

• 30%

• 40%

The arrows on the electromagnet show the direction of the magnetic field. The polarity of K is

• North

• Positive

• South

• Negative

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5