Physics Electrostatics
A neutral metal sphere is touched by a negatively charged metal rod. During the process, electrons are transferred from the _____ to the _____ and the sphere acquires a _____ charge.
Charged rod, neutral sphere, negative
A positively charged rod is brought close to one end of a neutral metallic plate. What type of charge is induced on the closest side of the plate?
Negative
What is the charge on an atom with 8 protons, 8 neutrons, and 7 electrons?
Negative
What is the charge on the can on the right side in diagram C?
Negative
A neutral electroscope is touched with a negatively charged rod. What is the charge on the electroscope after the rod is removed?
Negative
Sphere A carries a positive charge 4Q and sphere B is neutral. Initially the spheres are separated by a distance r. The spheres briefly touch each other and move to the initial separation. What is the new charge on each sphere?
2Q
A positively charged sphere with a charge of +8Q is separated from a negatively charged sphere -2Q by a distance r. The spheres briefly touch each other and move to the original distance r. What is the new charge on each sphere after they move to the distance r?
3Q
What are conductors?
Any kind of metal,like gold, copper, aluminum, the human body, and water
What are outside of an atom?
Electrons
A positively charged can is touched by a person standing on the ground. The can subsequently becomes neutral. The can becomes neutral during this process because ______.
Electrons pass from the person to the can
A negatively charged object:
Has more electrons than protons
Two neutral conducting pop cans are touching each other. A positively charged balloon is brought near one of the cans as shown below. The cans are separated while the balloon is nearby, as shown. After the balloon is removed the cans are brought back together. When touching again, can X is ____.
Neutral
What is an insulator?
Plastic, rubber, glass, wood
What two parts of an atom are located in the nucleus?
Protons and Neutrons
Which of the following is not an insulator?
Salt water
A plastic rod is rubbed with a piece of animal fur. The plastic rod acquires a negative charge during this process. Which of the following is true about the charge on the piece of fur?
The fur has a positive charge after the rubbing process
What is the charge on a neutron?
Zero(neutral)
Charging by conduction
breifly touching 2 objects together
Charging by induction
bringing a charged object close to not touching
Charging by friction
vigorous rubbing
