Any simple/precise answer to these questions will be appreciated. Thanks!
1. What is the basic equation for power (in terms of amps + ohms)?
2. What is the purpose of a resistor?
3. Which is a more efficient electronic circuit: parallel or series?
4. Why do scientists refer to current (I) as if it flows from positive to negative when, in actuality, electrons flow from negative to positive?
5. How are static friction coefficients calculated?
6. What is diffraction?
7. How are electric fields/magnetic fields created?
8. Do each of these fields induce a corresponding force?
9. What is the Law of Induction?
10. How does one change the magnetic field?
11. What is magnetic flux?
12. What is electric flux (if that even exists)?
13. How does flux affect Induction?
14. Is there a way kinetic energy (like a treadmill or stationary bike) could power a light bulb with electromagnetic induction?

I have a hard drive enclosure whose USB type B Socket came off of the circuit board. I am looking for a USB type B horizontal socket to solder. I don’t want to waste my hard drive enclosure without giving a try. I tried looking online for this socket but haven’t found any place. I went to radio shack and they have no idea.
Please help!!

I need a schematic layout for a circuit board that I can turn something on and off with a remote control. This would be a great help. Thanks a lot

It’s a Katana by Sanyo.
Image here: http://www.analytica1st.com/analytica1st/img/sanyo_katana.gif

Right away, i took the battery out. Is the battery the problem? Did the water short-circuit it? Will it ever work again?

I absorbed the water behind the main display screen (the one you see upon opening the phone), but could not get to the tiny screen on the front. There are still a few droplets of water in there. I also opened the back where the battery goes to air that out; I exposed the phone to a fan to try and dry the water. I don’t know if any of this will do any good.
My phone does not have a sim card. Will all my pictures, numbers, and texts be lost forever? I guess i can’t ever get it back.

What would happen if i reassembled my phone and then plugged it into the charger? Would it fry the phone? > <ahhh
I had…important things on there…
Any help is appreciated…
R.I.P. my portable electronic friend of over 2 good years….
(the guys at the pool were laughing at me…) :<

I am a international student and I want to get into an engineering school that has a good electrical Eng program, but i don`t know which University I would have some reasonable chances to get in…I was thinking…University of Maryland or Virginia tech, but I don`t know what are my chances to get into…

h.s GPA 3.35 in my country
Electronic Technician degree GPA 3.65
3 years working as an Engineering`s technician
-Developing software and electronic circuits for automatic systems
-Attended some voluntary program

Which University should I apply with some chances to get into?

1. In selecting the wire size for a line cord, you should remember that
A. No. 16 is larger than No. 12. C. No. 8 is smaller than No. 10.
B. No. 14 carries more current than No. 18. D. No. 4 carries less current than No. 6.
2. Which one of the following appliance parts gets the hardest service?
A. Switch C. Heating element
B. Thermostat D. Line cord
3. The color used for the hot side of house wiring is
A. green. C. gray.
B. white. D. black.
4. An AWG No. 16 line cord with type HPN insulation has an ampacity of
A. 12 amp. C. 15 amp.
B. 13 amp. D. 17 amp.
5. To heat a room quickly, some electric room heaters are provided with
A. a heavy metal case. C. a push-button switch.
B. a motor-driven fan. D. an automatic thermostat.
6. If the current flowing through an electric heater increases from 6 to 12 amp while the voltage remains
the same, the heat produced by the heater will be
A. reduced one-half. C. two times the original heat.
B. unchanged. D. four times the original heat.
7. The wires used in a heating element are usually made of
A. copper. C. aluminum.
B. steel. D. Nichrome.
8. Why does a thermostat blade bend when heated or cooled?
A. It is made of two different materials.
B. There is a difference in temperature between the blade ends.
C. Different currents are applied to each end.
D. Mechanical pressure is caused by the high resistance.
9. When you are checking an electric heating appliance, the first test made should be for
A. excessive leakage. C. an open circuit.
B. the normal voltage supply. D. low resistance.
10. Why should you NOT repair heating elements by soldering?
A. Solder does not conduct electric current.
B. Solder joints are mechanically too weak.
C. Solder melts at the operating temperature of the heater.
D. Soldered joints have too high a resistance.
11. What type of selector switch can be used to control the heat output of three elements connected in
parallel?
A. SPST switch C. DPDT switch
B. DPST switch D. Shorting-bar-type switch
12. Thermostats used in electric irons differ from those in small room heaters in that they are
A. smaller in size. C. connected directly to the appliance plug.
B. operative at higher temperatures. D. mechanically more fragile.
13. How can you clean out the scales in an electric iron without taking the iron apart?
A. By blowing out the holes with compressed air
B. By scraping the tank and tubes with a drill bit
C. By brushing the clogged tubes with a stiff wire brush
D. By rinsing the tank and holes with a water-diluted chemical
14. Bus bars are used in an electric iron as
A. thermostat supports.
B. heat-adjusting resistors.
C. connectors between the thermostat and the element.
D. electrical terminals.
15. The water in a spray iron is prevented from returning to the tank by the action of a
A. suction tube. C. water pump.
B. check valve. D. pressure spring.
16. The heating element in an electric iron is in good working order if the resistance across the terminals
of the element reads approximately
A. 0 ohms. C. 120 ohms.
B. 15 ohms. D. 1000 ohms.
17. Why does the heat of the heating element stop when the desired temperature in an electric iron is
reached?
A. The thermostat blade opens electrical contacts.
B. The circuit through the element is closed.
C. The switch bypasses the thermostat.
D. The contacts on the blade touch.
18. Jumpering out the resistors in a resistance-controlled three-speed fan will cause the motor to
A. run at highest speed. C. run at lowest speed.
B. run at medium speed. D. stop immediately.
19. A fan equipped with a gearbox is capable of
A. running at three speeds. C. oscillating from side to side.
B. being tilted downward. D. reversing the direction of the motor.
20. If the fan blades rattle while the fan is turning, you can stop the noise by
A. oiling the blades.
B. adjusting the blade angles and the blade tip position.
C. tightening the motor end bells and motor mounts.
D. cleaning the blade surfaces.
21. The recommended way to hold a loose hub on a fan is by
A. riveting. C. welding.
B. soldering. D. cementing.
22. Quiet operation of a fan depends mostly upon the
A. weight of the blades. C. motor balance.
B. material of the blades. D. balance of the blades.
23. The blades of small fans are made of
A. aluminum. C. tin.
B. steel. D. copper.
24. A modern variable-speed fan does NOT use
A. a tapped inductor. C. an electronic speed control.
B. a multiple-winding motor. D. a dropping resistor.
25. An attic fan, or power ventilator, may have its power inadvertently tapped from
A. an upstairs bathroom. C. a basement service.
B. an attic lighting circuit. D. an air conditioning circuit

I’m trying to repair a flashlight, the wires separated from the solder and it must be repaired by being resoldered. I’m just wondering does it matter what point I have the wires (plural) connect to on the circuit board? Can it just go anywhere as long as it’s touching? I’m kind of new to soldering. Serious answers are appreciated.

in terms of electronic circuits. and components.

What is the full name of an Element starting with Q?
On a circuit board there are labels. For example for resistors it is "R", for diode "D", for capacitor "C" what is "Q" for?

I just put in a new hard drive. With the length of the power plugs the only way I got them in is with the circuit board side facing the top. Does this make any difference in long time performance? I can always buy a longer plug if it make any difference. They both work fine the way they are.