Pre-Class 1

A  The force between them also doubles.

B  The force between them remains unchanged

C  The force between them is quartered.

D  The force between them quadruples.

E  The force between them is halved.

A  The charged objects exert electrostatic forces on each other that are equal in magnitude and opposite in direction.

B  The first object exerts a large electrostatic force on the second object.

C  The second object exerts a large electrostatic force on the first object.

D  The charged objects exert electrostatic forces on each other that are equal in magnitude and pointing in the same direction.

A  1.32 × 10-19 N, towards the proton

B  7.53 × 10-11 N, towards the proton

C  7.53 × 10-11 N, away from the proton

D  1.32 × 10-19 N, away from the proton

E  9.41 × 108 N, away from the proton

F  9.41 × 108 N, towards the proton

A  A neutral object contains no charge.
Two positive charges attract each other.
Electric charge is quantized.

B  A positive charge and a negative charge attract each other.
Two negative charges repel each other.
Electric charge is conserved.
Electric charge is quantized.

C  A neutral object contains no charge.
Two positive charges attract each other.
Electric charge is conserved.

D  A neutral object contains no charge.
Two positive charges attract each other.
Two negative charges repel each other.

A  The end of the metal rod closest to the positively charged rod remains neutral.

B  The end of the metal rod closest to the positively charged rod acquires a negative charge.

C  The end of the metal rod closest to the positively charged rod can acquire either a positive or negative charge, depending on the composition of the metal.

D  The end of the metal rod closest to the positively charged rod acquires a positive charge.

A  The fur acquires a positive charge.

B  The fur acquires either a negative or positive charge, depending on how hard the rod was rubbed.

C  The fur remains neutral.

D  The fur also acquires a negative charge.