Electric Fields

A student rubbed two different material non-metal with two different cloths.

He found that the two rods are attracted each other.

What is the most likely explanation?

• The combination of rods transferred charges so that one rod had more positive charges and more negative charges on the other.

• The combination of rods and cloths put positive charges onto both of the rods.

• The combination of rods and cloths put negative charges onto both of the rods.

• Both rods were neutral.

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Ms Jo Jo rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?

• The balloons will repel each other.
• The balloons will attract each other.
• The balloons will become positively (+) charged.
• The balloons will pop.

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What types of charges attract?

• Positive and Positive
• Positive and Neutral
• Negative and Neutral
• Positive and Negative

What is static electricity caused by?

• A balance of power

• A balance of positive and negative charges

• An imbalance of positive and negative charges

• An imbalance of protons and neutrons

The girl's hair and the comb are attracting one another. The hair and the comb have

• opposite charges

• like charges

• no charges

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NGSS.MS-PS2-3

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If the two charges represented in the figure were brought near each other, they would

• attract each other.
• repel each other.
• cause static discharge.
• have no affect on each other

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According to the illustration, the charge on Object A is ______________, and the charge on Object C is ______________.

• negative, positive

• positive, negative

• positive, positive

• negative, negative

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NGSS.MS-PS2-3

If you rub a balloon on a sweater, the balloon will stick to the sweater. Which of the following explains this?

• Rubbing the balloon on the sweater builds up negative charges on the balloon. The balloon is then attracted to the positive charges on the sweater.

• Rubbing the balloon on the sweater builds up negative charges on the balloon. The balloon is then attracted to the negative charges on the sweater.

• Rubbing the balloon on the sweater takes all of the charges out of both the balloon and the sweater, therefore they stick together.

• Rubbing the balloon on the sweater builds converts all of the protons and neutrons on the balloon and sweater into neutrons, and all of these neutrons stick together.

Tags

NGSS.MS-PS2-3

the object that lose electrons will have a charge that is...

• negative

• positive

• neutral

Static electricity can be built by friction, conduction or induction. In the case of the finger it got charged by:

• Friction

• Conduction

• Induction