Charging Object
Select the correct words:
When two objects are pushed/rubbed together, the force of friction/magnetism causes them to have similar/opposite electric charges.
rubbed, friction, opposite
Complete the following sentences:
Like charges always/usually repel/attract.
Opposite charges always/usually repel/attract.
always repel, always attract
As you move further away from a charged object, what happens to the magnitude of the electric field?
It decreases
What is the difference between a conductor and an inductor?
Conductors allow charge to move freely; inductors do not.
If I have to charged objects and I double the distance between the two objects, what happens to the electric force?
The force decreases by a factor of 4
Radially out from positive charge, radially in towards negative charge
It provides an electron pool for electrons to leave the previously neutral object, allowing it to become charged.
If I have two objects and want to increase the force between the two objects, what are two ways I can do this?
Decrease the distance between the two objects or charge one of the objects using an outside source (could use conduction)
What happens if I place a neutral particle in an electric field?
It will feel no force.
What is the main difference between induction and conduction?
Objects do not touch in induction, but objects come into direct contact in conduction.
Explain the conservation law in electric charge.
Charge cannot be created or destroyed. In a system, total charge is always conserved. The net charge of the system will be equal to the original net charge of the system, even after the charge of the individual objects changes.
Draw the electric field between a positive and negative point charge. Draw the field between a positive and negative rod.
always towards negative terminal
Explain electron affinity. Which process is this used in?
Electron affinity is an important aspect of friction. It determines which direction electrons will flow when charging two neutral objects. Electrons always move towards the object with a higher affinity.
When a rod is rubbed on a woolen cloth, the rod acquires negative charge.
What type of electric charge does the cloth acquire?
What can you say about the magnitude of the two charges on the objects? What can you say about the sign of the charge?
positive charge, equal and opposite
Draw the electric field between two positive point charges. Draw the electric field between two negative point charges
away from positive, towards negative