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Electric Field and Field Strength

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Questions and Answers

What is the electric field around a charged object?

A region of space where the charged object is neutral

A force that only exists within the charged object

A scalar quantity that repels other charged objects

A vector quantity that exerts attractive or repulsive forces on other charged objects (correct)

What determines the strength of the electric field?

Neither the magnitude of the test charge nor the source charge

Only the magnitude of the test charge

Both the magnitude of the test charge and the source charge (correct)

Only the magnitude of the source charge

What is the purpose of introducing a test charge in an electric field?

To increase the strength of the electric field

To cancel out the electric field

To measure the strength of the electric field (correct)

To decrease the strength of the electric field

What is the unit of electric field strength?

NC^-1 Signup and view all the answers

What happens to the electric field if the source charge is negative?

The electric field changes direction Signup and view all the answers

What is the purpose of the concept of a test charge?

To measure the strength of an electric field Signup and view all the answers

What is the direction of the electric field around a positive charge?

Away from the charge Signup and view all the answers

What is the net electric field intensity on a positive test charge located between two point charges?

A vector sum of the electric fields attributable to each source charge Signup and view all the answers

What is the purpose of an electric field mill?

To measure Earth’s electric field Signup and view all the answers

Why is the ionosphere positively charged?

Because energy from the Sun strips electrons from atoms Signup and view all the answers

What is the purpose of an electrostatic precipitator?

To purify air by removing particles Signup and view all the answers

What happens when a new charge is placed in an electric field?

It experiences a force Signup and view all the answers