Hewitt Electrostatics

After you rub a balloon on your hair, what charge does the balloon have?

• Positive

• Negative

• Neutral

When a glass rod is rubbed with silk and the glass rod becomes positively charged, what happens to the electrons?

• they are removed from the rod

• they are added to the rod

A negatively charged plastic comb is brought close to, but does not touch, a small piece of paper. If the comb and the paper are attracted to each other, the charge on the paper

• may be positive or neutral

• must be positive

• may be negative or neutral

• must be negative

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

An electroscope is a device with a metal knob, a metal stem, and freely hanging metal leaves used to detect charges. The diagram below shows a positively charged leaf electroscope.

As a positively charged glass rod is brought near the knob of the electroscope, the separation of the leaves will

• remain the same

• increase

• decrease

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

After you rub a balloon on your hair, what charge does your hair have?

• Positive

• Negative

• Neutral

Tags

NGSS.MS-PS2-3

A positively charged glass rod attracts object X. The net charge of object X

• may be zero or positive

• may be zero or negative

• must be positive

• must be negative

Tags

NGSS.MS-PS2-3

The ________ between the clouds and air causes the clouds to be charged with electric charges.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The flow of negative charges from the cloud to the ground produces ________________________.

If two balloons have the same charge, what will happen if you place them close to each other?

• Nothing

• They will be attracted

• They will pop

• They will push each other away.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What types of charges attract?

• Positive and Positive

• Positive and Neutral

• Negative and Neutral

• Positive and Negative

Tags

NGSS.MS-PS2-3