Attraction/Repuslion
Comparing force and distance
Electric Fields
Electric PE
Miscellaneous
100
Two negatively charged particles that are both able to move freely will
Repel (move away from eachother)
100
A +12 C charge is located in between two negative charges as shown in the diagram. To its left there is a -4 C charge and to its right there is a -8 C charge.
How does the force of Q1 on Q2 compare to the force of Q3 on Q2 ?
Double the force
100
A uniform electric field is directed upward. If a small negatively charged object was placed in that field, then the field would exert a force on the object in which direction?
Downward
100
Two charged objects are held a distance apart as shown in the diagram. What would cause the electric potential energy in the system to decrease?
move them closer together
100
A uniform electric field is shown in the diagram between two parallel plates. Where in the electric field would you place a negatively charged particle to give it the greatest electric potential energy?
To the far right
200
A negatively charged particle and a positively charged particle that are both able to move freely will
Attract (move toward eachother)
200
True or False: Q1 will attract Q2 to the left while Q2 will attract Q1 to the right.
True
200
A uniform electric field is directed upward. If a small positively charged object was placed in that field, then the field would exert a force on the object in what direction?
upward
200
Two charged objects are held a distance apart as shown in the diagram. What would happen to the electric potential energy in the system when they move further apart?
decreases
200
A uniform electric field is shown in the diagram between two parallel plates. Where in the electric field would you place a positively charged particle to give it the greatest electric potential energy?
To the far left
300
As the distance separating two charges is decreased, what happens to the electric force?
It increases
300
True or False: Q2 will experience a greater force than Q1.
False
300
A uniform electric field is directed upward. If the strength of the electric field is decreased, the force experienced by the charge will:
decrease
300
Two charged objects are held a distance apart as shown in the diagram. The system including the two charged objects are released to accelerate freely. What happens to the kinetic energy of the system as they accelerate?
It increases
300
Two charged objects with charges +2.5 uC and -3.5uC are placed 5cm apart. Calculate the electric force.
3150 N
400
True or False:
Gravitational field exerts a force due to an object's mass, while the electric field exerts a force due to an object's charge.
True
400
Two charged objects attract each other with a certain force. If the charge on one of the objects is quadrupled with no change in the other or the separation, the force between them becomes
4x greater
400
An electric field has a magnitude of 40.0 N/C. If a small positive charge placed in the E-field has a charge of 0.1 Coulombs, what is the magnitude of the force exerted on the charge?
F = 4N
400
a. Two like-charges are held at rest and then pushed closer together and held at rest the new, closer distance.
b. Two like-charges are fired towards each other, slowing down until they stop, about to accelerate away from each other.
A
400
The two objects are then brought closer together to a distance of (½)d. When this happens the electric potential energy in the system will:
decrease
500
Someone in socks rubs their feet against their carpet. The socks gain a negative charge. On the atomic scale, why did the socks gain a negative charge?
electrons scraped off the carpet onto the socks
500
What happens to the electric force when the separation between two charged objects is increased to 3 times the original amount and both charges are kept the same?
1/9 the force
500
A small object with a positive charge of 2.0 Coulombs is placed in an electric field. Once it is placed, the E-field exerts a force on the charge of 12.0 N. What is the magnitude of the E-Field?
E = 6 N/C
500
A proton is initially moving to the right when it enters a uniform electric field directed upwards, as shown in the figure. Which trajectory (X, Y, Z, or W) will the proton follow in the field?
Y
500
The two objects are then separated to a distance of 4d. When this happens the electric potential energy in the system will:
increase