Electronics Engineering

It's a generator that creates 400hz AC signals, instead of 50 or 60hz. 400hz is often used on ships, because the equipment (generators, transformers) can be made much smaller.

importance of statistics in electrical engineering

Capacitors are measured in Farads or microfarads.

donor--arsenic, phosphorus, nitrogen

acceptor--boron, aluminum, gallium

Where you find wire insulation with ratings of 300 volts, 600 volts and 1000 volts, these are the highest allowable voltages that can be applied. A wire that is rated for 300 volts is good for 120 volts, 240 volts and 277 volts. At test research facilities, insulation on a wire is tested to destruction. The label that is given to wire's insulation, as a result of the tests, is the highest safest voltages that can be applied to that particular wire. So when you see a wire that has a label stating that it is rated for 300 volts it means that any voltage under and up to 300 volts is safe to apply.

One way to determine current is to measure it, with an ammeter. Another way is to calculate it using Ohm's law: current = voltage / resistance.

Intrinsic semiconductors have small conductivity at the room temperature.

and also if we raise the temperature to increase their conductivity then they will start acting merely like a conductor. and there will not be any control over the directions or the magnitude of the current flowing through it.

so by mixing the suitable impurity(dopant) we obtain the extrinsic semiconductor.

so that the conductivity as well as the control over the current can be increased.

Although intrinsic semiconductor are also somwhere used in electronics where i high resistance layers or a separation layers b/t two systems is needed.

like in PIN diode.

'Electricity' is not a quantity; it's the name of a subject area or topic (just like 'chemistry'). So 'current' describes a flow of charge (not 'electricity'), expressed in amperes. 'Voltage' (potential difference) is responsible for 'driving' current, expressed in volts. 'Resistance' is the circuit's opposition to current, expressed in ohms.

A circuit that has only a capacitor in it. Or the net reactance is below zero, making it capacitive. The current leads the voltage in a negative (capacitive) reactive circuit.

Yes.

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According to the SI units:

1 quadrillion = 1024

ten hundred trillion = 1000 x 1018 = 1021

Accordingly: They are not equal

The formula we need to use is called "Ohm's Law":

E = I x R

which can also be stated as:

R = E / I

or as:

I = E / R

where I = current (amps), E = potential difference (volts) and R = resistance (ohms),

"x" means "multiply by" and "/" means "divide by".

So, using the values stated in the question, the current I = 120 volts / 15 ohms = 8 amps.

there is no element that can't conduct electricity, only elements that do it well and others that don't do it so well.

Rubber is a very poor conductor of electricity, while copper, silver and gold are very good conductors.

hey

Both will kill you easily ;)

But medium/high voltage, high current DC is generally considered 'more dangerous' as it tends to make people clamp onto the cable rather than being thrown away from it, so fault current is suffered for longer as a result.

Hope this helps.

Paul.

ANSWER : NOT TRUE VOLTAGE DOES NOT KILL current however will even a 'D' cell can kill you [able to deliver 2 amps] Now which is more dangerous DC for sure it is continuous AC WILL PASS TROUGH ZERO AT TIMES ENOUGH MAYBE TO DISCONNECT

There is no such thing as a d.c. transformer; all transformers work on a.c.

So, what you are probably referring to is a power supply: the type of thing you would use, for example, to run a small radio or to charge a battery.

In that case, no, you cannot plug a a.c. appliance into a power supply that has a d.c. output.

Yes. Most flashlights have a series circuit involving a battery, a switch, and a bulb. More complex variants might have two bulbs in parallel, two or more bulbs on two switches, etc. but the basic principle is a series circuit - turn the switch on and the bulb illuminates.

serial adder:

1) Slower

2) It uses shift registers

3) IT requires one full adder circuit.

4) It is sequential circuit.

5) Time required for addition depends on number of bits.

Parallel adder:

1) Faster

2) It uses registers with parallel load capacity

3) No. of full adder circuit is equal to no. of bits in binary adder.

4)It is a combinational circuit

5)Time required does not depend on the number of bits

Electric device means a device which works by using electric power or current and it's working principle or working area is shown whoever sees it. Where as electronic device means it can work by consuming electric power or battery power, but we can not see the working principle , i.e , how it is working ,and just we see the result. Electronic devices are preprogrammed and it consists of chips (which are small pieces, encapsulation of programs.

All the volt drops across each component in the series circuit will add up to the emf of the battery or power supply. Note the voltage supplying the circuit and divide it by the sum of all the resistances in the circuit. This gives you the current which is the same through all components. Take a component's resistance and multiply by the current and you have the voltage drop across it.

the unit of measuring for displacement is cubic centimeter[cc].

The unit of measurement for displacement is the meters.

If the gate-channel junction of a JFET was not reverse biased the JFET would just act as a forward biased diode across that junction and the gate would cease to have any control over the channel conductance.

For the same reason in a MOSFET the substrate-source/channel/drain junction must remain reverse biased. The MOSFET could not act as a MOSFET.

Simple diode is a two-terminal pn-junction with appropriate contacts for connecting the junction to external circuits.

Power diode is formed by alloying, diffusion, and epitaxial growth. The modern techniques in semiconductor fabrication processes permit the desired device characteristics.

The operation of power diodes is similar to that of signal diodes; but it has larger power-, voltage-, and current-handling capabilities than those of ordinary diodes. Switching speed of the power diodes is low compared to that of signal diodes.

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