quiz 5a and 5b

Two charges that are separated by one meter exert 1-N forces on each other. If the charges are pushed together so the separation is 25 centimeters, the force on each charge will be

cm→m1 m→100 cm.25 cm = 1/4 force4^2 = 16

Two protons attract each other gravitationally and repel each other electrically. The stronger of these two forces is

electrical

Conducting materials are composed of atoms withloose outer electrons

loosely bound.

Much of the charge on a conducting cube is

mutually repelled toward its corners

Which of these does NOT have an electrical charge?

neutron

Charge carriers in a metal are electrons rather than protons because electrons are

none

It is said that electric charge is conserved, which means that electric charge can be neither created nor destroyed. The net charge on a charged capacitor depends on the medium between the capacitor plates. the area of the capacitor plates. the distance between the capacitor plates. all of the above none of the above

none of the above

Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is halved, then the force will be 2 F. F/2. F/4. F. none of the above

none of the above

Which of these has the greatest mass? electron proton

proton

When the distance between two charges is halved, the electrical force between the charges

quadruples

When a car is struck by lightning, the resulting electric field inside the car is

zero.

Two charges separated by one meter exert 1-N forces on each other. If the charges are pulled 3 meters apart, the force on each charge will be

0.11 N

The pair of protons in the nucleus of a helium atom A. attract a pair of orbiting electrons B. repel orbiting electrons C. Both of these D. neither of these

A. attract a pair of orbiting electrons

47) The electrical force on a 2-C charge is 60 N. What is the value of the electric field at the place where the charge is located? A) 20 N/C B) 30 N/C C) 60 N/C D) 120 N/C E) 240 N/C

B

A balloon will stick to a wooden wall if the balloon is charged: A. Negatively B. Positive C. Either D. Neither

C. Either

Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is also doubled, then the force will be

F/2.