For a point charge to feel a net force in a homogeneous magnetic field, which one of the following statements is true? The charge must

Q-1: For a point charge to feel a net force in a homogeneous magnetic field, which one of the following statements is true? The charge must:

1) move parallel to the magnetic lines of flux
2) have a component of its motion perpendicular to the lines of flux
3) be stationary
4) be a positive charge
ANSWER: 2 -- HAVE A COMPONENT OF ITS MOTION PERPENDICULAR TO
THE LINES OF FLUX

Q-2:  According to Gauss' Law, the magnitude of the electric field is zero everywhere inside a conductor if:

1) electrostatic equilibrium is achieved
2) the surface is a metal
3) the conductor is moving
4) the conductor is a non-Gaussian surface
ANSWER: 1 -- ELECTROSTATIC EQUILIBRIUM IS ACHIEVED

Q-3:  An air dielectric is replaced with a glass dielectric inside a capacitor of fixed dimensions. Relatively speaking, what will happen to the quantity of charge the capacitor can hold after the glass is inserted?

ANSWER: IT IS INCREASED WITH THE GLASS DIELECTRIC.

Q-4:  In a simple dc circuit, voltage equals resistance multiplied by current. This is also considered true in an AC circuit if the what values of the current and voltage are used.

ANSWER: ROOT MEAN SQUARE (RMS) VALUES

Q-5: Gauss' law of electricity, Gauss' law of magnetism, Faraday's law of induction, and Amperes' law form the basic equations of electromagnetism. This combination is collectively known as:

1) Coulomb's equations
2) Volta's equations
3) Fermi's equations
4) Maxwell's equations
ANSWER: 4 -- MAXWELL'S EQUATIONS

Q-6: The index of refraction can be considered:

1) a ratio of material thickness between substances
2) a ratio of velocities of light in different materials
3) a ratio of mass between materials
4) to have the units of photons
ANSWER: 2 -- A RATIO OF VELOCITIES OF LIGHT OF DIFFERENT MATERIALS

Q-7: In an ideal case, if a point source of light is placed at the focal point in front of a concave reflector, where will the image form?

ANSWER: WILL NOT FORM or FORMS AT INFINITY

Q-8: You are sitting in a frictionless barber chair. The barber decides to have some fun with you, so he spins the chair. As you spin, you find that you can slow down by extending your arms and legs. You have:

1) decreased your angular momentum
2) increased your angular momentum
3) increased your moment of inertia
4) changed the direction of the momentum vector
ANSWER: 3 --INCREASED YOUR MOMENT OF INERTIA

Q-9: A 10 kg mass initially sitting on the ground is placed on a ledge 3 meters above ground level. What is the increase in potential energy of the mass?

ANSWER: 294 JOULES (accept 300 JOULES, ASSUMES g=10m/sec2)

Q-10: A person sees a lightning bolt in the distance and tries to guess the distance to the bolt based on the time between the flash and the thunder. What general time span should she use?

1) 1 second equals 1 mile
2) 5 seconds equal 1 mile
3) 10 seconds equal 1 mile
4) 20 seconds equal 1 mile
ANSWER: 2 -- 5 SECONDS EQUAL 1 MILE