Wave Properties — Unit test Answers

The strength of the electric field 0.5 m from a 6 µC charge is _______ N/C. (Use k = 8.99 × 109 N• and round answer to the nearest whole number.)

Which statements correctly compare the gravitational force with the electrical force? Check all that apply.

Which factors affect the electrical force between two objects?

Which pair does NOT have an electric force between them?

A positive charge, q1, of 5 µC is 3 × 10–2 m west of a positive charge, q2, of 2 µC. What is the magnitude and direction of the electrical force, Fe, applied by q1 on q2?

The area around a charged object that can exert a force on other charged objects is a(n) _________.

Three charges are located at the vertices of a triangle, as shown.

Rolanda sees an error in her friend’s graphic organizer comparing electrical and gravitational forces.

When studying atoms, scientists can ignore the ______ force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom.

What is the direction of the electric field at a point directly to the left of a positive charge, Q?

Charges of +2 µC and +3 µC are 4 mm from each other. Raina’s group draws four diagrams trying to represent the electrical force between the charges.Which diagram is correct?

The diagram shows a charge moving into an electric field.

Tracy scuffs her socked feet across a carpet. When she touches a doorknob, she gets a small shock.How did Tracy become charged?

Marta, Cato, and Juan plan a skit to illustrate one of the methods of charging.Marta and Cato are walking together. Each has one flower and one box of candy. Juan offers Cato a huge bouquet of flowers, but Cato can’t take it because his hands are full.Cato hands his flower to Marta and then turns to Juan to take the bouquet.Marta walks away in one direction with two flowers and one box of candy. Juan keeps the bouquet and walks away in the other direction. Cato looks sad standing alone with only a box of candy.

Liana draws a diagram to show the direction of the electric force acting on a charged particle in a uniform electric field.

The diagram shows the electric field in the vicinity of a charge.

How does the electrical force relate to the charge of an object?

What is the strength of the electric field 0.020 m from a 12 µC charge? (Use k=)

One charge is decreased to one-third of its original value, and a second charge is decreased to one-half of its original value.

The table lists the mass and charge of a proton and a neutron.How do the gravitational and electrical forces between a proton and a neutron compare?