Electrostatics
Current & Circuits
Ohm's Law & Power Law
Momentum & Impulse
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100
Two positive charges one with a charge of +4Q and the other with a charge of +Q are separated by a distance of r.
Is the force between the objects attractive or repulsive or neutral?
Repulsive
100
Match the symbol to the device commonly found in a circuit.
Resistor
Fuse
Load
Fuse
Resistor
Load
100
Which of the following is the formula for current?
A. V=IR
B. P=IV
C. I= q/t
D. F=ma
q/t
C. I=q/t
100
In simple terms, what does an object’s momentum tell us?
A. How hard it is to run alongside it
B. How hard it is to stop its motion
C. How hard it is to carry it
D. How hard it is to increase its motion
B. How hard it is to stop its motion
100
What is the formula for Newton's 2nd Law of Motion?
F = ma
when a force is applied to a mass, it accelerates
200
Consider Coulomb's Law.
What does the r stand for?
A. charge on object 1
B. charge on object 2
C. electrostatic force between objects
D. distance between objects
D. distance between objects
200
Does current flow through a closed circuit?
Yes
200
True or False
The SI unit for current is ohms.
FALSE
The SI unit for current is amps.
200
Momentum is the product of an object’s _______ and _______.
A. Mass, velocity
B. Mass, direction
C. Velocity, direction
D. Velocity, weight
A. Mass, velocity
200
What is Newton's first law of motion?
A. An object at rest stays at rest and an object in motion stays in motion, unless acted upon by a force.
B. A force applied to a mass will cause it to accelerate.
C. Every action has an equal and opposite reaction.
D. Every mash potato should be covered by gravy.
A. An object at rest stays at rest and an object in motion stays in motion, unless acted upon by a force.
300
Looking at the diagram below there are three particles with the same magnitude of charge.
Charge q1 is located at the origin, Charge q2 is located 1m from the right of the origin, and Charge q3 is located 0.75m to the right of the origin.
Which direction will the positive charge q3 start to move?
A. Right
B. Left
C. It won’t move.
A. Right
300
Which bulb will light?
c.
300
Which equation is not a version of Ohm's Law?
A. V = IR
B. I = V/R
C. R = V/I
D. I = R/V
D. I = R/V
V = IR
I = V/R
R = V/I
300
Choose the 2 formulas for Impulse
A. J = Ft
B. J = mvf - mvi
C. J = mv
D. p = mv
E. p = ft
F. J = ma
A. J = Ft & B. J = mvf - mvi
300
A 2000 kg red car is moving at 25 m/s to the right when it rear ends a 1200 kg car which was moving at 15 m/s in the same direction.
After the collision the two cars get stuck together.
After the collision how will the blue car be moving? faster slower the same
After the collision how will the red car be moving? faster slower the same
blue faster
red slower
400
Looking at the diagram below there are three particles with the same magnitude of charge.
Charge q1 is located at the origin, Charge q2 is located 1m from the right of the origin, and Charge q3 is located 0.75m to the right of the origin.
Which charge will exert the most force onto the positive charge q3?
A. q1
B. q2
C. Both charges will exert the same force.
B. q2
400
If the current in the circuit is 7 amps and the resistance is 2 ohms, the voltage is ____ volts.
14 volts
V = IR = (7)(2) = 14
400
Which of the following is not a valid equation for Power?
A. P = IV
B. P = I2R
C. P = I/R2
D. P = V2/R
C. P = I/R2
B. Uses P = IV & V = IR
D. Uses P = IV & I = V/R
400
There are four balls with equal masses moving on a level lab table. The one with the most momentum is the ball that has the greatest —
A. altitude
B. hardness
C. temperature
D. velocity
D. velocity
p = mv
400
Which equation would you use to solve the following problem?
A circuit contains a 9 volt battery and a bulb with a resistance of 3 ohms. Calculate the current.
A. I = q/t
B. V = IR
C. I = V/R
D. R = V/I
C. I = V/R
500
An object possesses an excess of 9x1013 electrons. The type of charge of the object is positive or negative?
Negative
500
If a small appliance is rated at a current of 10 amps and a voltage of 12 volts, the power rating would be ___________ Watts.
A. 1200
B. 1.2
C. 120
D. 20
C. 120
P = IV = (10)(20) = 120
500
Which of the following would increase resistance in a wire?
CHOOSE 4!!
A. Having a shorter wire
B. Having a more conductive wire
C. Having a thinner wire
D. Having a longer wire
E. Having a less conductive wire
F. Lower temperature
G. Having a thicker wire
H. Higher temperature
C. Having a thinner wire
D. Having a longer wire
E. Having a less conductive wire
H. Higher temperature
500
A black billiard ball is moving with a speed of 5 m/s and hits a blue billiard ball with the same mass that is at rest.
After the collision, the black billiard ball is at rest, what is the speed of the blue billiard ball?
5 m/s
500
__________________ is a simplified model of a charge that is assumed to occupy a single point in space.
__________________ is the study of stationary electric charges and their interactions.
__________________ is a subatomic particle with a negative charge.
__________________ is the SI unit of electric charge.
__________________ is the force exerted by stationary electric charges.
Electron Electrostatics Point Charge Electrostatic Force Coulomb
Point charge
Electrostatics
Electron
Coulomb
Electrostatic Force