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Circuits
Overachieving and under-appreciated, circuits are the foundation that our technological society is built on. Now's your chance to find out not only how they work, but why. Questions regarding the physics behind voltage, resistance, capacitance, inductance, transistors, LEDs, switches, and power supplies; and how they're used to create analog and digital circuits, should be directed here.
1,646 Questions
Why does in a potato when connected to a circuit appears blue near the positive terminal?
copper salts are forming on that electrode and diffusing into the potato flesh.
What happens to voltage and current in a parallel circuit?
-- The voltage between the ends of each parallel branch is the same.
-- The current through each parallel branch is inversely proportional to the resistance
of that branch. (It's the voltage divided by the resistance of the branch.)
Do charged particles exert force on each other?
yes. same forces repel each other and opposite forces attract.
What is the resistance you n the circuit when 10v2k greek symbol along with4k greek symbol?
In order to calculate the effective combined resistance, we need to know
whether they are connected in series or in parallel. We don't know which
circuit configuration is indicated when you say "along with".
Does siries circuit have to have two bulb?
You need at least two components in your circuit before
you can tell whether it's a series circuit or a parallel one.
What is ampacity of 25mm cable at 250 volts?
The amperage rating is dependent upon the insulation rating. A pair of 25mm squared wires touching each other are rated at 131 amps. Three 25mm squared wires touching each other are rated at 110 amps.
What does the farad rating mean in capacitors?
The rating or 'size' of a capacitor, called its "capacitance", is related the amount of
charge the capacitor can store, to the amount of energy it holds when it stores some
charge, and to the opposition of the capacitor to the apparent flow of alternating
current through it.
If a capacitor has a capacitance of 1 farad, then
-- One coulomb of charge stripped off of one plate and added to the other plate produces
1 volt of potential difference between the plates.
-- The energy stored in the capacitor is 1/2 the square of the voltage across it.
-- Its impedance is (0.159 divided by the frequency) ohms.
The farad is an enormous capacitance. A typical capacitor used in a 'lumped' circuit ...
the kind of construction where you would buy a capacitor and solder it in ... has a
capacitance in the range of maybe 10 picofarads (trillionths of a farad) to maybe
100 microfarads (millionths of a farad).
What are advantages of gfci circuit breakers?
Advantage #1 - Shock Prevention The most obvious advantage of a GFCI outlet is that it prevents shocks and electrocution. A GFCI outlet has a built-in sensor that monitors the inflow and outflow of electricity from an appliance. For example, if a live wire inside an appliance is in contact with the metallic surface of the appliance, then, you will receive a shock if you touch this appliance. However, if the appliance is plugged into a GFCI outlet, then the GFCI will notice the change in electrical flow occurring as result of the loose wire, and it will immediately shut down the power. Thus, GFCI outlets are necessary for shock prevention. Although they are slightly more expensive than regular power outlets, this massive advantage makes them well worth the additional cost.
Advantage #2 - Fire PreventionThe primary function of a GFCI outlet is to detect ground faults. Since ground faults, which occur when the flow of the electrical current leaves a circuit, can cause electrical fires, it is safe to say that one of the advantages of installing a GFCI outlet is the prevention of fires. Although electrical fuses do offer basic protection against electrical fires, when they are combined with a GFCI outlet, you never have to worry about an electrical fire harming your home or workplace.
Advantage #3 - Prevention of Damage of Appliances Sometimes, over a period of time, as insulation breaks down, a certain amount of electric current begins to leak into household appliances or other electronic items. If the outer body of the equipment is not made of metal, you may not get a shock, but this constant leakage of current will damage the equipment. In fact, this leakage of electricity is one of the most common reasons why computer hard disk drives fail. With a GFCI outlet, you do not need to worry about this happening. This is because the instant the GFCI circuit detects a leak, it will shut down the circuit. This can help prevent expensive equipment and appliances from getting damaged due to electrical leaks.
What regulates the flow of electrons in an electrical circuit?
a. amperage and voltage
b. the size and length of the wires
c. voltage and resistance
d. fuses and circuit breakers
What is meant by the term large signal amplifier?
power amplifiers are the amplifier which raise the power levels of the signal.the power amplifier may also defined as a device which converts dc power to ac power and whose action is controlled by the ac input signal.
Power amplifiers are also known as "LARGE SIGNAL AMPLIFIER".the term large signal arises because they use large part of load line for their operation,but the small signal amplifiers are use only 10% load line for their operation.
What is the implication of negative voltage gain?
If the input and output are expressed in volts, then negative gain means a 180° phase shift.
If the ratio of output to input is expressed in dB, then negative gain means attenuation,
i.e., less power out than power in.
How can you identify the emitter of transistor SL100?
The SL100 transistor has a TO-39 case. In the TO-39, the emitter is closest to the tab, and the collector is furthest away from the tab.
Can you suggest more efficient led driver circuit?
We probably can. You would need to provide the original circuit first, though. :D
Why rs232 voltage level converting to ttl level?
RS-232 is a standard built a longer while ago, and its specifications dictate a maximum voltage of +-25V. HIGH signal levels at +-5V, +-12V and +-15V are not uncommon. The range of operation is from -25V to +25V. Also, RS-232 standard notes that levels between -3V and +3V are illegal (as in, they are assumed not to exist, nor carry any information).
On the other hand, TTL stands for Transistor-Transistor Logic, and the maximum rating for that is 5V. HIGH signal levels are at any point above 3.5V. The range of operation is between 0V and 5V.
If one were to connect these with no conversion, the TTL device would probably be burned. Even if it would withstand, the designs are sufficiently different for them not to communicate properly. Thus, the need to 'bridge the gap' between the two.
What happens if you change pmos to nmos and nmos to pmos in cmos?
It will act like a buffer but not the exact buffer. Since nmos conduct logic 1 weakly and pmos conduct logic 0 weakly, the output ranges from vdd-vtn to vtp. For eg. If you apply 5v then the op will be 4.3 not the complete 5v. If you apply 0v then output will be 0.7v not 0 v.
Hope this works
How do you symbolically represent a conecting wire and a resistance?
The symbol for a wire is simply a line between circuit elements. The symbol for a resistor is a squiggly line. The related link goes directly to a picture of the symbol.
Does voltage split equally in parallel?
The voltage going into each parallel node will be equal to the voltage of the node before it, as long as the resistance is the same. For example, if you have a current of 5 volts split between two 1k ohm resistors, each 1k ohm will have 5 volts before the resistor drops the voltage.
electric current from the small contacts flowing through the coil create magnetic force inside the core, this attracts metal plate which interconnects the other two relay contacts.
Can you be a conductor of electricity while wearing rubber boots?
Of course you can. It just can't enter or leave your body through your feet.
But you can still conduct plenty of electricity, and hurt yourself badly, if it
goes in one hand and out the other, for example, straight through your heart.
