All Flashcards
Label the diagram of charging by induction (grounded).
1: Charged Object, 2: Neutral Object, 3: Induced Negative Charge, 4: Ground Connection, 5: Flow of Electrons
What is the effect of bringing a positively charged rod near a neutral metal sphere?
It causes charge separation (polarization) within the sphere; negative charges accumulate near the rod, and positive charges move away.
What happens if you ground a neutral object while a charged object is nearby (induction)?
Charge will flow between the object and the ground, resulting in the neutral object acquiring a charge opposite to that of the charged object.
What is the effect of increasing the distance between two charges?
The electrostatic force between them decreases (inversely proportional to the square of the distance).
What happens when two neutral objects with different electron affinities are rubbed together?
The object with the higher electron affinity gains electrons and becomes negatively charged, while the other object loses electrons and becomes positively charged.
What happens when the leaves of an electroscope separate?
The leaves of the electroscope separate because they have the same charge, and like charges repel each other.
What are the steps for charging by induction (permanent)?
- Bring charged object near neutral object. 2. Ground the neutral object. 3. Remove the ground. 4. Remove the charged object.
What are the steps for charging an electroscope by induction with a positively charged rod?
- Bring the positively charged rod near the electroscope. 2. Briefly ground the electroscope while the rod is near. 3. Remove the rod.
What are the steps for charging by contact?
- Bring a charged object into physical contact with a neutral object. 2. Allow charge to transfer until equilibrium is reached. 3. Separate the objects.
What are the steps for charging by friction?
- Select two neutral objects made of different materials. 2. Rub the objects together. 3. Separate the objects; they will now have opposite charges.
What happens when a positively charged sphere is placed at the center of a neutral metal sphere?
- Negative charges are induced on the inner surface. 2. Positive charges are induced on the outer surface. 3. The net charge on the neutral sphere remains zero.