Understanding Charge

A rubber rod is rubbed with a piece of fur and becomes negative. The rubber rod is negative because:
1. The fur gained protons.
2. The fur lost protons.
3. The fur gained electrons.
4. The fur lost electrons.
A rubber rod is rubbed with a piece of fur and becomes negative. Which of the following is true about the fur?
1. The fur gained electrons and is positively charged.
2. The fur lost electrons and is positively charged.
3. The fur gained electrons and is negatively charged.
4. The fur gained electrons and is positively charged.
What is the second charge?
1. Positive
2. Negative
3. Neutral
A small positive charge is moving to the right. If it takes the path shown, what is the charge of the second object?
1. Positive
2. Negative
3. Neutral
A small positive charge is moving to the right. If it takes the path shown, what is the charge of the second object?
1. Positive
2. Negative
3. Neutral
A metal and wood sphere are charged. After they are touched, what will be the charge of the wood sphere?
1. −2C
2. −1C
3. 0C
4. 1C
5. 2C
After the two metal spheres are separated, what is the charge of the left sphere?
1. Positive
2. Negative
3. Neutral
While the spheres are touching the right sphere is:
1. Positive
2. Negative
3. Neutral
After they are separated, the right sphere has been charged by:
1. Contact
2. Polarization
3. Induction
A charged rod is put close to (but not touching) two conducting spheres. The charged rod is then removed and the spheres are separated. What is the charge of the left sphere afterwards?
1. Positive
2. Negative
3. Neutral
What is the charge of the right sphere after they are separated.
1. −4C
2. −2C
3. −1C
4. 0C
5. 1C
6. 2C
When the negatively charged rubber rod is brought close to (but not touching) the electroscope the metal leaves at the bottom move apart. What is the charge of the leaves?
1. Positive
2. Negative
3. Neutral
When the negatively charged rubber rod is brought close to (but not touching) the electroscope the metal leaves at the bottom move apart. What is the total charge of the electroscope?
1. Positive
2. Negative
3. Neutral
The negatively charged rubber rod above the electroscope is negative because
1. The rod lost protons.
2. The rod gained protons.
3. The rod lost electrons.
4. The rod gained electrons.
If the rubber rod is rubbed on the metal ball, the charge of the electroscope is
1. positive
2. negative
3. neutral
If the rubber rod is rubbed on the metal ball, the electroscope becomes charged by
1. contact
2. polarization
3. induction
When the negatively charged rubber rod is brought close to (but not touching) the electroscope, the metal leaves at the bottom move apart. The electroscope is charged by
1. contact
2. polarization
3. induction
A negatively charged rod is brought close to (but not touching) two conducting spheres. The metal spheres are touching. Which of the following diagrams correctly shows the charges on the spheres?
A negatively charged rod is brought close to (but not touching) two conducting spheres. The metal spheres are not touching each other. Which of the following diagrams correctly shows the charges on the spheres?
How does the charge of a proton compare with the charge of an electron?
1. Same magnitude, but different sign.
2. Same sign, but different magnitude.
3. Same sign and same sign.
4. Different magnitude and different sign.
Objects become negative because.
1. They gain protons.
2. They lose protons.
3. They gain electrons.
4. They lose electrons.
Objects become positive because.
1. They gain protons.
2. They lose protons.
3. They gain electrons.
4. They lose electrons.
If the two larger charges are fixed (they can't move), what will the smaller charge do?
1. Stay where it is.
2. Move at constant speed to the right.
3. Move at constant speed to the left.
4. Accelerate to the right.
5. Accelerate to the left.
In which case is the smaller charge harder to move up?
In which case is the smaller charge harder to move straight up?
Object 1 and 2 repel each other. Object 2 and 3 attract each other. How will object 1 and 3 interact?
1. They will attract each other.
2. They will repel each other.
3. They will not affect each other.
Object 1 and 2 repel each other. Object 2 and 3 repel each other. How will object 1 and 3 interact?
1. They will attract each other.
2. They will repel each other.
3. They will not affect each other.
A neutral metal sphere is rubbed with a negatively charged rod. What is the charge of the sphere afterwards?
1. Positive.
2. Negative.
3. Neutral.
A neutral metal sphere is rubbed with a negatively charged rod. Afterwards the sphere has been charged by
1. Contact
2. Polarization
3. Induction
A charged balloon is brought close to a wall that is made up of an insulating materials. The wall is charged by.
1. Contact.
2. Polarization.
3. Induction.
A balloon is rubbed with fur on the left side only. A suspended object is attracted to the left side of the balloon. What will happen if the suspended object is brought near the right side of the balloon?
1. It will be attracted.
2. It will be repelled.
3. It will be neither attracted or repelled.
What is the charge of the right sphere after they are separated.
1. 0C
2. 2C
3. 3C
4. 4C
5. 5C
6. 6C
7. 8C