Quiz on Electric Charge, Force, Field and Flux

Two balls are attracting each other as they hang from the ceiling. What can you say about their charges?

• both are negative

• both are positive

• one is positive, the other one is negative

• either both are positive or both are negative

Tags

NGSS.HS-PS2-4

When a glass rod is rubbed with silk, which of the following statements best describes what happens?

• electrons are removed from the rod

• protons are removed from the silk

• the silk is charged positively

• the silk remains neutral

Which activity DOES NOT produce the same result as the other three?

• walking across a woolen carpet

• brushing dry hair with a plastic comb

• sliding over a plastic-covers automobile seat

• scraping food from a metal bowl with a metal spoon

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

When two dissimilar materials contact each other some of the electrons in one material will be drawn into the other material, this effect can be increased by rubbing the two surfaces together. What charging process is involved?

• charging by friction

• charging by conduction

• charging by induction

• charging by polarization

In which way is the electric force similar to the gravitational force?

• Electric force is both attractive and repulsive.

• Electric force is proportional to the mass of the object.

• Electric force is similar in strength to gravitational force.

• Electric force decreases in strength as the distance between the charges increases.

Tags

NGSS.HS-PS2-4

A negatively charged object is brought close to the surface of a conductor, whose opposite side is then grounded. What kind of charge is left on the conductor’s surface?

• neutral

• positive

• negative

• both positive and negative

When three charges exert forces simultaneously on the fourth charge, the net force acting on that charge is the vector sum of the forces that the three charges would exert individually. This principle is known as the _______________.

• Coulomb’s Law

• Gauss's Law

• Superposition Principle of Forces

• Superposition Principle of Electric Field

Tags

NGSS.HS-PS2-4

Which of the following provides a graphical representation of an electric field?

• Cartesian plane

• field lines

• hyperbola

• parabola

Which of the following would likely to happen to the electric field of force of an isolated negative charge?

• It will move perpendicular.

• It will move parallel.

• It will move radially outward.

• It will move radially inward.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

If the distance between two point charges is tripled, the mutual force between them will be changed by what factor?

• 9

• 3

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5