Electric Charges Learning Check

Front

What happens when two objects with negative charges are brought close to each other?

Back

They will repel each other.

Front

How do you determine the electrical charge of an object based on the count of positive and negative charges?

Back

If positives outnumber negatives, the object has a positive charge; if negatives outnumber positives, it has a negative charge; if the numbers are equal, it has no charge.

Front

What is the charge on a hard rubber rod that repels a copper ball?

Back

The charge on the rod is positive.

Front

If two balloons are shown and they repel each other, what can be inferred about their charges?

Back

The balloons have the same charges.

Front

What can be inferred about the charge of Ball #1 if it is attracted to Ball #2, which is labeled with plus signs?

Back

Ball #1 has a negative charge.

Front

Define electric charge.

Back

Electric charge is a property of matter that causes it to experience a force when placed in an electromagnetic field.

Front

What are the two types of electric charges?

Back

Positive and negative charges.

Front

What is the principle of conservation of charge?

Back

The total electric charge in an isolated system remains constant.

Front

What is the effect of bringing a positively charged object close to a neutral object?

Back

The neutral object will become polarized, with opposite charges attracted to the charged object.

Front

What is static electricity?

Back

Static electricity is the accumulation of electric charge on the surface of objects.