Newton's Laws
Circuits
Magnetics
Conservation of Energy
Potpourri
100
A ball falls off of a cliff of height 9.8. How long does it take the ball to reach the ground?......................... A. 9.8 secs............................................... B. 2 secs............................................... C. 1.414 secs ............................................... D. 2.818 secs.............................................
C. 1.414 secs
100
A capacitor 2.5 F and another capacitor 3 F are connected in series and another capacitor 3 F is connected in parallel to this series. What is the equivalent capacitance? A. 4.364 F B. 8.5 F C. 1.941 F D. 0.938 F
A. 4.364 F
100
A flow of electrons through a wire is due south. What is direction of the North-Pole of a magnet placed above the wire? A.East B.Up C.North D.West E.Down
A. East
100
As a ball of mass M rolls down a hill of height H. What is the change in total energy? A. MgH B. 1/2 M C. 0 D. 1/2 MV^2 E. sqrt(2gH)
C. 0
100
What is the magnetic field at the center of a toroid of mass M, radius R, current I, number of turns n, and cross-sectional area A? (permeability constant=u A.un^2A/R B. nuI C. 0 D. nuI/2piR E. none of the above
C. 0
200
What is the rotational inertia of a sphere of mass M and radius R around an axis tangent the surface of the sphere? A. 2/5 MR^2 B. 7/5 MR ^2 C. MR^2 D. 1/2 MR^2
B. 7/5 MR^2
200
When two bulbs are connected in parallel which one is true? A. The total resistance is less than the resistance of either bulb alone. B. The Voltage provided by the battery is split evenly by each bulb. C. If one light burns out they neither will light.
A.The total resistance is less than the resistance of either bulb alone.
200
An electron is moving east in an electric field due east and a magnetic field due north. How does the velocity of the electron change? A.It slows down and moves vertically downwards. B.It speeds up and moves vertically downwards. C.Its speed is constant, but turns vertically downwards. D. Its speed is constant, but turns northwards. E. The velocity is unchanged.
A.It slows down and moves vertically downwards.
200
A spring with spring constant k is compressed a distance x by a ball of mass m fired at it. What is the work done by the spring in stopping the ball? a. 1/2 kx^2 b. You need to know the velocity of the ball c. -1/2 kx^2 d. kx e. mgx
c. -1/2 kx^2
200
Which of the following will increase the resistance of a wire? I. Increase the resistivity of the wire II. Increase the cross-sectional area of a wire III. Increase the length of a wire A.I only B.II only C.III only D.I and II only E.I, II, and III only
D. I and II only
300
A projectile is fired at 25 m/s from a cannon on the ground at an angle of 30 degrees above the horizontal. How far horizontally does it travel? A. 27.35 meters B. 110.46 meters C. 25 meters D. 55.23 meters
D. 55.23 meters
300
If you have a strand of Christmas tree lights and one bulb is not working but the remaining bulbs continue to burn, then you know the lights are wired using... A. A parallel circuit B. A series circuit C. Capacitors D. Inductors
A. A parallel circuit
300
A magnet moves directly into the page towards a wire loop lying in the plane of the page with the North pole of the magnet facing towards the loop. In what direction is current induced in the loop? A. The current is induced in the magnet B. Counter-clockwise C. No current is induced D. Clockwise E. It depends on the charge of the loop
B. Counter-clockwise
300
A boy named Nathan has potential energy PE at the top of a hill of height H. He then jumps off. What is his potential energy at 1/2 H? A. 1/2 PE B. 1/4 PE C. 1/8 PE D. 2 PE
A. 1/2 PE
300
If an elevator is accelerating upwards at a rate of 4.9 m/s^2, what would be the weight of a 100 kg inside the elevator? A. 980 N B. It depends on the mass of the elvator C. 100 N D. 490 N E. 1470 N
E. 1470 N
400
A bomb of mass 3.4 kg is dropped from an airplane of mass 5000 kg traveling at 25 m/s at a height of 400 m. what is the Force acting on the bomb? A. 33.32 Newtons B. 66.64 Newtons C. 16.66 Newtons D. 9.8 Newtons
A. 33.32 Newtons
400
Which of the following would increase the brightness of a light bulb? A. Decreasing the resistance B. Increasing the resistance C. Adding a second battery in parallel D. Adding a second light bulb in series E. None of the above
A. Decreasing the resistance
400
Two parallel wires have currents flowing in opposite directions.The bottom wire's current is flowing to the right, and the upper wire has the current flowing to the left. Point P is a point located directly in between the two wires. What direction is the magnetic field going at point P? A. North B. South C. East D.Into the page E. Out of the page
E. Out of the page
400
A ball of mass 12.5 kg moving in a circle of radius 2m experiences a centripetal force 25N. What is its kinetic energy? A. 25 J B. 50 J C. 2.5 J D. 100 J
A. 25 J
400
A ball of mass 3 kg moving at 3 m/s to the right collides with a ball of mass 4 kg moving at 4 m/s to the left. After the collision the 3 kg ball is moving to the left at 2 m/s. What is the velocity of the 4 kg ball? A. 2 m/s to the left B. 1 m/s to the right C. 1 m/s to the left D. 2 m/s to the right E. 500 m/s to the right
C. 1 m/s to the left
500
A man of mass 10 kg stands at one end of a raft of mass 5 kg and length 10 m. He walks across to the other end of the raft. What is the distance the raft moves in the water? A. The raft doesn't move. B.5 m C.6.667 m D.2.5 m E. 3.33 m
C. 6.667 m
500
A capacitor is connected in series to a battery and resistor in a closed circuit and allowed to charge fully. The battery is then removed. Which of the following will increase the current flowing across the resistor? I. Decrease the resistance of the resistor II. Decrease the distance between the capacitor's plates III. Decrease the surface area of the capacitor's plates? A. I only B. II only C. I and II only D. III only E. None of the above
What is E?
500
Which of the following has the most flux? A. A circular loop of radius R parallel to a field B B. A square loop of side R perpendicular to a field B C. A circular loop of radius 2R perpendicular to a field B D. A circular loop of radius R parallel to a field 2B E. A square loop of radius 2R perpendicular to a field 2B
C. A circular loop of radius 2R perpendicular to a field B
500
1. Which one of the following choices is an example of a non-conservative force? A. elastic spring force B. electrical force C. kinetic frictional force D. Gravitational force
C. kinetic frictional force
500
Who is the best physics teacher in the world? a. Mrs. Matney b. Your mom c. Isaac Newton d. Albert Einstein e. None of the above
a. Mrs. Matney
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