Charges
Electroscopes and Such
Coulombs law
Electric Fields
100
What is the charge of an electron in Coulombs?
-1.6x10-19 C
100
When a glass rod is rubbed with plastic, the rod acquires a positive charge because - (think about electrons)
electrons are removed from the rod to the plastic
100
A proton and electron separated by a certain distance experience an electrostatic force. Is the force between them attractive or repulsive?
Attractive
(Daily Triple - x3 Points)
100
What is the charge of this object based on it's electric field?
Negative Charge
200
Which of these is not a conductor?
Sea water, Gold, Silver, Glass, Platinum, Copper
Glass
200
When a negatively charged rod is brought near an electroscope, but not touching, what is this an example of?
Induction
(BOMB - Choose a team to lose 200 Points)
200
Two charged spheres separated by a distance experience an electrostatic Force. If one of the charges is doubled, what happens to the force?
Also Doubles
200
Which diagram best represents the electric field near a positively charged conducting sphere?
A) 
B) 
C) 
D) 
(B)
300
If an atom has 14 protons, 16 neutrons, and 15 electrons. Would the atom be positively charged, negatively charged or neutral?
Negatively Charged.
(Daily Double - x2 Points)
300
When a negatively charged rod is brought near an electroscope and touches it, it gives the electroscope a negative charge. What is this an example of?
Conduction
300
Two charged spheres separated by a distance experience an electrostatic Force. If the distance is tripled, what happens to the force?
It's 1/9 of the original Force.
(Daily Double: x2 Points)
300
What is the sign of the charge of each sphere?
Sphere A is negative and sphere B is positive
400
If an atom has 7 excess electrons, what is its charge in Coulombs?
-1.12 x 10^-18 C
400
If a negatively charged rod is brought close (no touch) to a neutral electroscope which of these diagrams is the result?
A
400
The diagram below shows two metal spheres charged to +1.0 × 10-6 Coulomb and +3.0 × 10-6 Coulomb, respectively, on insulating stands separated by a distance of 0.10 meter.
What is the electrostatic force between them?
2.7 Newtons
400
The diagram below represents the electric field of two charges, A (left) and B (right). Which charge is stronger? How do you know?
A (left), because it has more lines coming out of it.
(Daily Double x2)
500
Two metal spheres are brought together. One has a charge of 275 C and the other has a charge of -125 C. What is the final charge on each sphere?
75 C
500
If a negatively charged rod is brought close to a neutral electroscope, and then is grounded using your finger. When we take our finger and rod away which diagram closely resembles the resulting charge of the electroscope?
B
500
What is the magnitude of the electrostatic force exerted on an electron by another electron when they are 1.5x10-6 meter apart?
1.024x10-16 N
500
Explain what is wrong with this diagram? What is one way to fix it?
Electric Field lines should not flow out of the top charged object since it is negative.
The top part is incorrect, it should be a positive charge
Or if they are both negative, the lines should not cross and go away from each other.