REVIEW for Unit 4 Assessment: Electricity & Magnetism

What can be done to make the coil rotate faster?

• add one more battery

• change the polarity of the magnets

• use a plastic wire loop

• decrease the size of the magnets

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-3

Friction, conduction, and induction are all methods through which (a)   can be transferred.

• neutrons

• heat

• charge

• protons

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NGSS.HS-PS3-4

What type of particles flow between objects when they are charged by friction or conduction?

• electrons

• neutrons

• protons

• quarks

Tags

NGSS.MS-PS2-5

Based on the strength of the magnetic fields they produce, arrange the solenoids from strongest to weakest.

• Second Weakest

• Solenoid B

• Second Strongest

• Solenoid D

• Strongest

• Solenoid A

• Weakest

• Solenoid C

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NGSS.HS-PS2-5

The electromagnet shown below is made up of a coil of electrical wire wrapped around an iron core. Which of the following would decrease the strength of this electromagnet?

• adding batteries to the circuit

• increasing the number of wire loops in the coil

• removing its iron core

• increasing the current through the coil

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NGSS.HS-PS2-5

When objects are charged by (a)   , they do not need to touch each other.

• conduction

• induction

• friction

• all of these

Which of the following exerts gravity?

• only objects on Earth

• only planets, moons, and stars

• any object with mass

• only the Earth

Tags

NGSS.HS-PS2-4

Charlotte built a simple electromagnet, shown below. She found that the electromagnet picked up the entire pile of paper clips the instant she turned it on. Which of the following might allow Charlotte's electromagnet to pick up a single paper clip at a time? (There are 2)

• increasing the number of loops in the electromagnet's coil

• removing the iron nail from the core of the electromagnet

• increasing the number of batteries supplying voltage to the electromagnet

• increasing the distance between the electromagnet and the paper clips

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which pair of atoms are repelled from each other with the most force? (Remember that distance impacts force. Smaller distance = Greater force; Greater distance = smaller force)

• Pair P & Q

• Pair C & D

• Pair X & Y

• Pair A & B

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NGSS.HS-PS2-4

George holds a magnet above a paper clip. The paper clip moves toward the magnet and sticks to it before the magnet actually touches it. A magnet is surrounded by (a)   , which applies a push or a pull to an object without actually touching it.

• an electric current

• a simple machine

• a generator

• a magnetic field

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NGSS.HS-PS3-5