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12th Grade STEM: Electric Field Concepts

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12th Grade STEM: Electric Field Concepts

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Questions and Answers

What is the electric field defined as?

A region of space without any electric charges

A region of space in which an electric is at rest

A region of space without any force

A region of space in which an electric experiences a force (correct)

Who introduced the concept of 'lines of force' to visualize the electric field?

Thomas Edison

Michael Faraday (correct)

Nikola Tesla

James Clerk Maxwell

What can be said about the direction of the lines in the electric field?

The direction is opposite to the field's direction

The direction is the same as the field's direction (correct)

The direction has no correlation with the field's direction

The direction is random and changes constantly

What does a test charge represent in an electromagnetic field?

An imaginary point charge used to investigate single-particle dynamics Signup and view all the answers

What do arrows on the field lines indicate?

They indicate the direction of the electric field, away from positive charges and towards negative charges Signup and view all the answers

What does a point charge represent in terms of charge distribution?

A charge distribution with a value at only a single point Signup and view all the answers

What is the direction of the electric field at the location of a positive test charge when a charge of 6𝜇𝐶 exerts a force of 2.4𝑥10−4 N towards the right side?

Radially inwards towards the positive charge Signup and view all the answers

In which direction do field lines tend to be drawn closer together?

Where the field is stronger Signup and view all the answers

If a charge of 6𝜇𝐶 exerts a force of 2.4𝑥10−4 N on a test charge, what is the magnitude of the electric field at that location?

40 N/C Signup and view all the answers

What is the direction of the electric field at a location 0.10m to the left of a -4.2𝜇𝐶 charge?

Towards the left Signup and view all the answers

If a charge of 6𝜇𝐶 exerts a force of 2.4𝑥10−4 N on a test charge, what would happen to the force if the distance between them is doubled?

Force is halved Signup and view all the answers

How does the direction of the electric field change as you move farther away from a negative charge?

Reverses direction Signup and view all the answers

What is electric flux a measure of?

Flow of electric field through a surface Signup and view all the answers

What is the formula for electric flux?

ɸ = E * A Signup and view all the answers

How is electric flux related to the number of electric field lines penetrating a surface?

Directly proportional Signup and view all the answers

What is the angle 𝜃 in the formula for electric flux?

Angle between electric field lines and surface Signup and view all the answers

How is electric flux affected by the cosine of the angle 𝜃?

It decreases as cosine 𝜃 decreases Signup and view all the answers