Electronics Engineering

If you have a simple circuit. For eg: One voltage source and one resistor, then the voltage of the circuit will always remain the same, the current however will decrease following Ohms' Law V=I*R.

If we have a current source instead of a voltage source, we are forcing the current to be a certain value so if we increase the resistor value the current will remain the same but the voltage will increase.

AND gate is an all or

nothing gate because in able to have an output of logic 1,all of the input must be all logic 1 or else the output will be nothing or simply logic 0.

You may use electronic bulb of any kind in your street. It is entirely depends upon your choice but the main thing you should keep in mind that their light should be of white color like tube light.

Because it will be more difficult to see things in some other color other then the white one.

Most light bulbs waste energy as heat. Even LEDs. Large light bulbs require more power.

When we give d.c supply to a transformer the primary winding will burn because constent flux will be will be produced which doesnt link with secondary so max current will circulate on primary winding only

no but you cant exceed the wattage of the generator if you are close to that amount you will notice a reduction not nescessarily in voltage but amperage which will have the same affect If the generator is 7500 watts, 240 volts, that is approximately 30 amps maximum load. According to one online calculator for voltage drop, your AWG 8 wire run would have only a 3 percent drop over 95 feet or so, or 120 feet if you're only using 25 amps. Ref: www.elec-toolbox.com/calculators/voltdrop.htm

its simple.reverse saturation current is because of the flow of minority carriers across the junction when the bias is changed suddenly from forward to reverse.this is why it doesnt depend on forward bias

Power FET

if an emf is induced in a coil due to the current flowing through itself is called SELF INDUCTANCE.

on the other hand if an emf is induced on another coil due to the current flowing through the previous coil then it is called MUTUAL INDUCTANCE.

suppose there are two coils A and B

a current is flowing through A.

now if the flux produced due to this current induce an emf on the same coil A, then it is SELF INDUCTANCE, and if it produce emf on B, then it is MUTUAL INDUCTANCE due to coil A.

Yes, ductile iron is conductive. Its electrical conductivity is similar to that of gray cast iron due to the presence of graphite in its microstructure. This makes it a good choice for applications where electrical conductivity is required.

With electricity from the mains, the current chages direction 50 times each second, so it is called alternating current.

There have been a few errors in recent years with capacitors that go bust from normal use. These are most often leaking electrolytic fluid from a crack at the top or the bottom. This fluid is most often drying up and leaves a dark brownish crystalline compound on and around capacitor.

Some other capacitors are just bulging upwards on top and give no signs apart from this.

A healthy capacitor has got no visual deformities.

If in doubt about a certain capacitor then de-solder it and test it in a multimeter that can measure its capacitance.

Total current entering a node is always zero.

mostly because fans use induction motors therefore the starting torque is less,this is provided by the capacitor by increasing the voltage
There are usually two capacitors in a ceiling fan motor. One is the "start" capacitor and the other is the "run" capacitor. Simply put, an AC motor needs a rotating magnetic field in order turn the motor shaft. This is done by applying voltage with different phases to different windings. In a single phase system there is only one voltage phase. The capacitor is used to provide a phase shift in the windings of the motor, making it appear that the motor is operating in a multiphase system.

Running 8 hours a day, a two ton air conditioner uses approx 720 kwh/month (which is about 2.4 kilowatts per hour over the month).

The usage decreases with longer operation. See chart at the link I have provided.

There are two primary types of electrical amplification available for any application.

The first type, transistor amplification, is what you are most likely familiar with. This is the common form of amplification used today in most consumer products like radios and car amplifiers. However, before the invention of the transistor, vacuum tubes did the same job. Tubes are electrical switches mounted inside of glass enclosures that are under vacuo. They resemble light bulbs. In radio transmission, however, these vacuum tubes are commonly the size of a household clothes dryer. These tubes amplify the frequency before the voltage is sent up the radio station's transmission tower. At the top of the tower, a broadcast antenna is mounted. These antennae are special shapes and lengths that correspond to both the frequency and direction of the intended transmission.

When we say "number of g forces" the g we are typically (not always) talking about is the average overall Earth of around g = 9.81 N/kg or m/sec^2 (See NOTE)

So, for example, if a jet jock pulls 2 g's in a hairy vertical climb, he's pulling 2g = 19.62 N/kg on his body. And if his mass is m = 100 kg, that means his effective weight is W = m(2g) = 1962 Newtons.

Bottom line. g forces are measured as the number of average g's.

NOTE: N/kg = kg.m/sec^2//kg = m/sec^2 which is to say they are equivalent units.

If the number of turns in the primary side of the transformer is 200 and the number of turns in the secondary coil is 100, the turns ratio is 200 to 100, or 2 to 1. This application would be a step-down transformer, reducing voltage by one half and doubling current.

If the voltage is AC a transformer could be used. If the voltage is DC calculations could be made to apply the proper size resistor to the circuit so that it has a 3.7 volt voltage drop across it.

The reason FM has lower power and AM has higher power is because the more power that an AM signal has, the farther it will go, but FM does not work that way. AM waves can bounce off of the atmosphere, especially at night. This is the reason that you can hear AM stations from far away at night. FM, on the other hand, can't bounce. FM waves only go in a straight line from the tower and no matter how much power you transmit with, an FM wave will only go a short distance. AM Waves can travel through trees and buildings, and FM can't.

Reason: The common Emitter mode has voltage and current gain better than the other two configurations(CB and CC).

i.e it has a current gain greater than that of CC mode and greater voltage gain than that of CB mode.

The differences are given below:

80286

1. Low data bus width (16 bit)

2. Returning from protected mode to

real mode is hard and complicated.

3. Small RAM/Memory

80386

1. High data bus width (32 bit)

2. Easy for 80386 3. Big RAM / Memory (Real memory = 4GB and virtual memory= 64TB)

The difference between an RC and LC is that the frequency - determining device in the RC oscillator is not a tank circuit. LC can operate with A or C biasing, while RC can only operate with A.