Electrical Forces

Electricity

(Forces and Energy - Book Page 75)

What do we want to know?

Fields Exist Between Objects

Basically, we want to be able to demonstrate that fields exist between objects - even when they aren't touching.

Can you give me examples of this?

What do we want to know?

Factors Affect the Strength of Forces

Gravity - what factors do we know affect gravity?

Electricity - what factors do you think affect electricity?

Magnetism - what factors do you think affect magnetism?

Multiple Choice

_____ is a property of matter that causes electrical phenomena.

• Electric charge

• Electron

• Electric field

• Shoestring potatoes

(Page 76 - 77)​

Section 1: Electric Charges and Forces

Draw

Draw an object with a neutral charge.

Draw

Draw an object with a positive charge.

Draw

Draw an object with a negative charge.

Draw

Draw your two objects (positive charge and negative charge) interacting with one another.

Multiple Choice

What would happen to two objects if they had like (same) charges? For example: positive and positive

• Attract

• Repel

• Nothing

• They would go to lunch at Pancheros

Open Ended

Do all objects experience elect

(Page 78)

​

Section 2: The Strengths of Electric Forces

Open Ended

What does the strength of electric forces depend on?

Draw

For each box, draw the strength of electric charge for objects with a negative charge. Label the boxes with one of the following: weak charges, strong charges, short distance, long distance.

(Pages 79 - 80)

​

Section 3: Electric Fields

Open Ended

How does an electric field help to predict the behavior of an object?

Draw

Draw an electric field diagram that includes a weak field with a positively charged test object inside the field lines.

Draw

Draw an electric field diagram that includes a strong field with a negatively charged test object inside the field lines.

Poll

How confident are you in answering this question:

What factors affect the strength of electrical force?

• HELP! I am lost.

• I could take a good guess.

• Pretty sure I know the answer, but don't call on me.

• I KNOW! PICK ME! PICK ME!