You have 1.50 volts available to charge it with. What capacitance should you choose? answer in F

I am hoping to withere create one or buy one to be able to generate up to 100 volts at 1amps.

I have a 6v 50 MAh solar panel and a 3v dc motor. How do I reduce the voltage of the solar panel to 3 volts in order to power the dc motor safely?

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1. When electric current is flowing in a circuit, if the voltage applied to the circuit is increased,

A. the resistance will increase.
B. the current will increase.

C. the resistance will decrease.

D. the current will decrease.

2. Which of the following information sources will not be directly affected by the Telecommunications Act of 1996?

A. Telephone services
B. The Internet

C. Newspaper publishing

D. Cable television

3. Porcelain, paper, glass, and rubber are all examples of electrical

A. conductors.
B. batteries.

C. insulators.

D. grounds.

4. A testing instrument that an electronics technician will connect to selected points inside a piece of electronic equipment and measure electrical values such as ohms, volts, and amperes is called

A. a signal generator.
B. a power supply.

C. an oscilloscope.

D. a multimeter.

FIGURE A-1—Use this illustration to answer Question 5.

5. Look at the four schematic symbols shown in Figure A-1. Each of the symbols is labeled with a number. Which of the following statements about these symbols is correct?

A. Symbol 1 represents a diode, symbol 2 represents a resistor, symbol 3 represents an LED, and symbol 4 represents a transistor.
B. Symbol 1 represents a diode, symbol 2 represents an LED, symbol 3 represents a transistor, and symbol 4 represents a resistor.

C. Symbol 1 represents a transistor, symbol 2 represents a resistor, symbol 3 represents an LED, and symbol 4 represents a diode.

D. Symbol 1 represents a transistor, symbol 2 represents a diode, symbol 3 represents a resistor, and symbol 4 represents an LED.

6. Which of the following is a correct definition of the term rectification?

A. Rectification is the opposition to current flow in a circuit.
B. Rectification involves sensing an electrical quantity and converting it to a signal.

C. Rectification is the conversion of AC current to DC current.

D. Rectification refers to the connection of components into a circuit.

FIGURE A-2—Use this illustration to answer
Questions 7–10.

7. Look at the simple circuit illustrated in Figure A-2. What will happen when only switch S1 is closed?

A. The light bulb will light up.
B. Current will flow in the circuit.

C. The resistance of the circuit will increase.

D. Nothing will happen—the light bulb won't light up.

8. In the circuit shown in Figure A-2, what will happen when switches S1 and S3 are both closed?

A. The light bulb will light up.
B. Current will flow in the circuit.

C. The resistance of the circuit will increase.

D. Nothing will happen—the light bulb won't light up.

9. In the circuit shown in Figure A-2, what will happen when switches S2 and S3 are both closed?

A. The light bulb will light up.
B. Current will flow in the circuit.

C. The resistance of the circuit will increase.

D. Nothing will happen—the light bulb won't light up.

10. In the circuit shown in Figure A-2, which switches must be closed in order for the light bulb to light up?

A. Only switch S1 needs to be closed in order for the light bulb to light up.
B. Only switches S1 and S2 need to be closed in order for the light bulb to light up.

C. Only switches S1 and S3 need to be closed in order for the light bulb to light up.

D. Only switches S2 and S3 need to be closed in order for the light bulb to light up.

11. At a job interview, the most effective way to prove your proficiency to a prospective employer is to show that you have

A. membership in several professional organizations.
B. certification as an electronics technician.

C. experience with on-line research.

D. your own test equipment.

12. Which one of the following letters is used as an abbreviation when representing a unit of electric current?

A. E
B. R

C. C

D. A

FIGURE A-3—Use this illustration to answer Question 13.

13. Safety is a concern around electronic equipment of all types. When you see the sign and the symbol shown in Figure A-3, what particular safety hazard may exist?

A. High voltage
B. Laser light

C. Delicate equipment

D. Radioactivity

14. Which of the following statements about light-emitting diodes is correct?

A. Light-emitting diodes conduct current in either direction in circuits.
B. Light-emitting diodes are used as indicators in circuits.

C. Light-emitting diodes have very short life-spans in circuits.

D. Light-emitting diodes are used

I want to make an electrical circuit with 11 standard 5mm leds connected with one normal push to make switch. Could someone tell me what type of resistors, wire, etc. to use to make it work, and safe.

Also i want to connect it to a mains transformer so how many volts will i need to get the right amount of power and not blowing all the leds. 3V, 9V etc?

Please help,

Kind regards!

Can anybody help me finding an electronic circuit for converting 6 volts DC input to 10 volts DC output. You may give the circuit diagram or refer any website to get it directly from. The current limit at input is 1.2 Amp.

How is that possible? I read in wikipedia and they say it's about 650 volts! And that means fishes are a step ahead us because they have known and controlled electricity much longer than human being! (haha)

By the way, back to the topic. I just don't understand how it works, because they swim on water but they don't get a "short circuit" (you know what I mean, imagine if you soak electronic devices on water) and they can "turn" the electricity on everytime they want.

Another stupid question, if 1 electric eel could make 650 volts, could we use that energy? Like take a lot of electric eels and put them together in a bucket and then make them angry so they make electricity and we use that energy?

Stupid question number 2, what happens if we juice 'em with electricity? Are they gonna die?

Sorry for the stupid questions, I'm just curious, thanks!

N.B. : I would really appreciate it if someone could explain it in simple english and without scientifical term because I'm not a scientist and I easily could get lost in a hard explanation.

Thanks again!

15. On a printed circuit board, electronic components will be mounted

A. from the substrate side of the board.
B. from the side of the board that contains the conducting paths.

C. from the foil side of the board.

D. from the side of the board that's covered with copper sheeting.

16. Which of the following statements about the measurement of electrical quantities is correct?

A. Resistance is measured in units called ohms.
B. Voltage is measured in units called amperes.

C. Electrical pressure is measured in units called watts.

D. Current is measured in units called volts.

I need help understanding Ohms law.

Here is what I have so far.
I = V/R.

I is the current in amperes.
V is the potential difference in volts.
and
R is a circuit parameter called the resistance (measured in ohms, also equivalent to volts per ampere).

I need help understanding Ohms, and Ohms Law, can you please help?

I know what Amperes are, 6.242 x 10 to the 18th power. Electrons. passing a given point in one second. Right?

I am self taught, I am teaching myself about Electricity and Magnetism.

I get my information from sources like, Wikipedia, YouTube, Yahoo Answers, and Google.

Seriously, I am teaching myself, so that I can fully understand, and then learn how to built circuits, so I can make cool and or useful things with electronics, I wanna be a better Electronic Engineer, and not just a Software Engineer.

Thanx

I found on the internet a document made by Tom Bearden which said that

NEVER PUT IN DIRECT CONTACT THE SOURCE AND THE LOAD.

Principle:
You can use as source a simple elevated wire, to "tap" potential from 200-300 volts/meter between earth and ionosphere or a car battery or whatever you like, but you must use ONLY calibrated, doped wire, or else you shall not have free energy, over unity.

You have a serial process as follows:
1 – extract trapped energy from the source onto collector;
2 – switch the collector off the source, onto the load;
3 – wait while the collected energy in the collector discharge through the load;
4 – switch the collector back off the load and onto the source.

So, the circuit may looks like that :

a battery, an electronic timed switch, a collector(capacitor),another electronic timed switch and the load.

I want to know if this can be true.

You have the document here:

http://www.cheniere.org/techpapers/Final%20Secret%209%20Feb%201993/indexold.html

Thank You!