Charge Interactions

Conservation of Charge

Electric Charges

• Electric charge is a property of matter

• There are 2 basic charges

• ~Positive

• ~negative

• The magnitude of the unit of charge is  $1.6\ x\ 10^{-19}C$  

Electric Charges and Excess

• Notice how small the charge is on 1 electron or 1 proton. The magnitude of the unit of charge is  $1.6\ x\ 10^{-19}C$  

• When we talk about the charge on an object, we are either measuring the excess of or the lack of negative charge. 

Charge Interactions

From the inquiry, you found that like charges experience a repulsive force, and unlike charges experience an attractive force.

The size of the force depends on

~the magnitude of the charges

~the separation of the charges

Multiple Choice

How does the magnitude of the charges effect the force on the objects?

• The larger the charges, the bigger the force.

• The larger the DIFFERENCE in the charges, the bigger the force.

• The size of the force depends on the sign of the charge.

Multiple Choice

How does the separation of the charges effect the force on the objects?

• The larger the separation, the larger the force.

• The smaller the separation, the larger the force.

• The force does not depend on the separation.

Conservation of Charge

The total charge in an isolated system does not change. Charges can move within the the system, but none will enter or leave.

Multiple Choice

What is the total charge on this system?

• -8μC

• 8μC

• 0C

Multiple Choice

What is the total charge on this system?

• -9μC

• -3μC

• 3μC

Multiple Choice

What is the total charge on this system?

• -6μC

• -3μC

• 3μC