14 practice sets · Page 1 of 1
Two positive charges Q1 and Q2 are separated by a distance r. The charges repel each other with a force F. If the distance between the charges is cut to one-fourth what is the new force acting on each charge?
16F
4F
2F
8F
Two positive charges Q1 and Q2 are separated by a distance r. The charges repel each other with a force F. If the magnitude of each charge is doubled and the distance stays unchanged what is the new force between the charges?
F
2F
4F
1/4 F
Sphere A is charged positively and sphere B is neutral. The spheres are brought near each other. Which of the following statements is true?
There is no electrostatic force between the spheres since one is neutral
There is a repulsive electrostatic force between the spheres
There is an attractive electrostatic force between the spheres
There is a repulsive electrostatic force applied only on sphere B
Two positive charges with magnitudes 4Q and Q are separated by a distance r. Which of the following statements is true?
The charge with a greater magnitude exerts a larger force on the small charge
The charge with a greater magnitude exerts a smaller force on the small charge
The forces on each charge are the same in magnitude and opposite in direction
The forces on each charge are the same in magnitude and pointing in the same direction
A positively charged rod is brought near a charged electroscope. As a result of doing this, the electroscope leaves move closer to each other. What is the charge on the electroscope?
Positive
Negative
Neutral
It depends on the distance between the electroscope and the rod
A negatively charged rod is brought near a charged electroscope. As a result of doing this, the electroscope leaves move further apart. What is the charge on the electroscope?
Positive
Negative
Neutral
It depends on the distance between the electroscope and the rod
A positively charged rod is brought near a charged electroscope. As a result of doing this, the electroscope leaves move further apart. What is the charge on the electroscope?
Positive
Negative
Neutral
It depends on the distance between the electroscope and the rod
A negatively charged rod is brought near an uncharged, grounded electroscope. Which of the following statements is true?
The positive charge flows from the electroscope to the ground
The positive charge flows from the ground to the electroscope
The negative charge flows from the electroscope to the ground
The negative charge flows from the ground to the electroscope
A neutral electroscope is touched with a positively carged rod. After the rod is removed the electroscope is charged positively because of:
Induction
Conduction
Thermoemission
Photoemission
A neutral electroscope is touched with a negatively charged rod. What is the charge on the electroscope after the rod is removed?
Positive
Negative
It stays Neutral
It depends on the contact time
A positively charged sphere A is brought close without touching to a neutral sphere B. Sphere B is touched with a grounded wire. What is the charge on sphere B after the wire is removed?
Positive
Negative
It stays Neutral
It depends on the contact time
A positively charged rod is brought close to one end of a neutral metallic plate. What type of charge is induced on the farthest side of the plate?
Positive
Negative
Neutral
It depends of the separation between the rod and plate
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?
Positive
Negative
Neutral
It depends of the separation between the rod and plate
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?
It acquires a positive charge but greater in magnitude than the rod
It acquires a positive charge but less in magnitude than the rod
It acquires a negative charge but greater in magnitude than the rod
It acquires a positive charge with the same magnitude as the rod
