In the above circuit there are 3 resistors, R1,
R3,R4 (there is nothing at the
R2 position).
Assuming that the total Voltage is 12 volts. The values of
the resistors are
R1 = 2 Ohms
R3 = 2 Ohms
R4 = 4 Ohms
a) What is the total current that runs in the circuit?
b) What is the voltage, V3?
Explain why transmission lines must be of high voltage in order
to minimize energy loss.
What keeps protons bound in an atomic nucleus?
Explain why an anti-neutrino must be created during the decay
process of a free neutron
Why is 235-Uranium used as the principal fuel in a nuclear
fission reactor
Light Bulb A is a fluorescent bulb and Light Bulb B is an incandescent
one. Bulb A is rated at 20 watts and Bulb is rated at 100 watts. You
pay 10 cents per KWH. If you leave both bulbs on for 8 hours what does
bulb A cost you compared to bulb B?
Bulb A has an initial cost of $20 while Bulb B has an initial
cost of only $1. Both give off the same amount
of light. Bulb A lasts for 10,000 hours and Bulb B lasts for 1,000
hours. Show that Bulb A is more economical than Bulb B when both
are used for 10,000 hours
Briefly explain how electricity is generated with magnets and
coils of wire.
Why does the photoelectric effect indicate that light behaves
like a particle?
There is a circuit that has a Voltage of 24 volts. There is one
resistor in this circuit with a resistance of 8 Ohms. What is the
current that runs in this circuit? What is the total power (in watts) in the
circuit?
What is the principle difference between electricity and magnetism
(hint: think about poles)
Briefly explain how a photovoltaic device works
Explain what the basic limiting factor currently is to getting
electric vehicles more into the mainstream of American driving.
Briefly explain the concept of superconductivity.
Explain how its possible that charge can be induced with out
any physical contact between materials. Cite an example
in nature where this frequently occurs.
Explain what the basic motion of a charged particle is when it
moves in a magnetic field.
Qualitatively explain what determines the total amount of
magnetic force that can be exerted on charged particles.
What kind of experiment did Orsted do in 1820 and what did it
show?
Briefly explain how a transformer works.
What are the inputs that are used to estimate when the world's
supply of oil will runout? In approximately how many more years
will this happen?
You juts bought a computer that you need to assemble. The label on the
computer says "This sucker requires 1000 watts of power to go". You
also note that this computer has no resistors in its power circuit
(well you did buy it at a garage sale).
Approximately how many amps of current need to be delivered to your
computer to reach the requisite power level and what value of
resistance do you have to put in its circuit to achieve this many
amps of current.
Explain what the process of electrolysis is.
Explain what the concept of thermodynamic efficiency is as its
applied to a coal-fired steam plant.
What is the primary difference between a parallel circuit and
a series circuit?
