Electronics Engineering

This question does is not answerable. A watt is a volt times an amp. With out knowing how many amps the bulbs use there is no answer.

The "requirement" of using two capacitors with the crystal in the 8051 is complicated, and based on many factors, such as series resistance, the design of the parallel resonant feedback circuit, stray or parasitic capacitance, startup stability, etc. Insight can be gained from Intel's Application Note AP-155 but, in the final analysis, from a purely pragmatic standpoint, the requirement is there simply because "Intel says so". Use the circuit from the data sheet.

A computer is considered digital because of the way that it stores information. The bit, which is a single "on" or "off" in a computer system, is a single digit. An example of a difference between digital and analogue is thus: If you have a voltage, from 0 to 5 volts, you could represent 2.5 volts in an analogue system as 2.5 volts. However, in a digital system, that voltage would need to be converted. The resolution refers to how many "steps" there are between 0 and 5 volts. Let's say that we were going to represent our voltage with 8 bits (or 8 on and off states). That gives us a potential for 256 combinations, with 0 being 0 volts, and 255 being 5 volts. Therefore, 2.5 volts would be represented by 128. That is a DIGITAL representation of an ANALOG value.

The Series circuit is a single path for current flow. like Christmas tree lights, one part of the path is obstructed (a light that's bunt out ) they all go out.

Parallel circuits have more than one path for the current flow, so if one path is obstucted, the current can take another path (like rungs of a ladder )

electric current

120v

If an external Voltage is applied to a multimeter while the multimeter`s function switch is in the Ohm meter position then the Ohmmeter is apt to be destroyed or disabled. Therefore the simplest answer is that the power must be turned off in order to avoid damage to the Ohm meter and possibly to yourself caused by Voltages present in the circuit while the power is own. Another reason of course is because a valid Ohm reading can not be obtained while Voltages are present across the resistance that is being measured because the Ohmmeter itself applies a Voltage across the resistance and then a sampling of the current through the unknown resistance is used by the Ohmmeter`s circuitry to cause a calibrated deflection of the Ohmmeter and thus display on the meter`s dial the Ohmic value of the unknown resistance.

For the same reasons as above it is also a good practice to discharge all the capacitors in the circuit after the power is turned off and before any in circuit resistance measurements are made.

8051 MICROCONTROLLER has no in built A/D Converters but PIC has it.

8051 MICROCONTROLLER based on CISC architectuture while PIC based on RISC archirecture.

8051 has 250 instruction which take 1 to 4 machine cycle to execute while PIC has nearly 40 instruction.

Your quartz watch, your cell phone, all electronics that uses a computer inside. The quartz crystal forms the time base for the digital pulses.

Crystal oscillators are also used in radio receivers and transmitters to provide accuracy in frequency selection.

In a transmitter it provides the exitation frequency. In the receiver it provides the local oscillator in a superhetrodyne setup.

Multifrequency devices (tunable and channelised radio) take the local oscillator and multiply and divide it, to provide a comparison frequency for a voltage controlled oscillator (VCO). The VCO is then controlled by a Phase Locked Loop (PLL) which holds the required frequency very accurately.

An aperiodic signal cannot be represented using fourier series because the definition of fourier series is the summation of one or more (possibly infinite) sine wave to represent a periodicsignal. Since an aperiodic signal is not periodic, the fourier series does not apply to it. You can come close, and you can even make the summation mostly indistinguishable from the aperiodic signal, but the math does not work.

"from anode to cathode".

Normally, no. Taking a radio valve (electron tube), since the anode is positive compared to the cathode, and since electrons flow from surplus (at the negative cathode) to deficiency (at the positive anode), they do *not* flow from anode to cathode in normal operation.

It's possible to have electrons striking the anode and *knocking off* electrons from it, and then to have those electrons travelling back towards the cathode. This is secondary emission. It was a problem in four-element "tetrode" valves in the early days, but has now been eliminated in practical designs.

Long story short: it's possible, but undesirable and not common.

It depends on the particular diode. They come in all different values.

p=i square x r = 500ma * 500ma = .25 * 4.7k = 1175 watts

AND gate is called an all or nothing gate.Because it produces a 1 only in one case when all its inputs are "1". In all other cases its output is a "zero".

The output short circuit current is the solar cell's current when the voltage is zero, or when it, is short circuited.

7407 is "Hex Buffers/Drivers With Open-Collector High-Voltage Outputs". Buffers are used to clean up a noisy signal, to change from one voltage to another, or to convert a high output impedance to a low output impedance.

The computer chip was invented in America by Lee de Forest!!!!

yes i want to F.E result

How it works is not nearly as important as what it does. The "how" involves distance sensors similar to radar guns, computers, and algorithms. The "what" that the driver needs to know is that it will slow the car down automatically if the car see's a vehicle in front of it getting too close, and match that cars speed. Typically the car will then speed back up to the speed set by the driver when it no longer sees that obstacle a.k.a. that car exited, sped up, or you changed lanes. How it works is not nearly as important as what it does. The "how" involves distance sensors similar to radar guns, computers, and algorithms. The "what" that the driver needs to know is that it will slow the car down automatically if the car see's a vehicle in front of it getting too close, and match that cars speed. Typically the car will then speed back up to the speed set by the driver when it no longer sees that obstacle a.k.a. that car exited, sped up, or you changed lanes.

a line following robot follows a black line about 3/4 inches in width on a black surface. these robots are usually used in compititions. according to rules, the robots are raced one at a time and the robot with the shortest time wins. the curves in the lines must be 4 inchces or more in diameter

Generally power is expressed in watts. The gain is the ratio of the output power to the input power. Gain = (output power)/(input power) if the gain is expressed in terms of log(base10) it is known as Decibel power gain Decibel power gain = Log10(Gain)dB if 1milliwatt power is taken as reference then Decibel power gain = Log10(Output power/1 milliwatt)dBm

In a three phase motor each leg (3 phases) in the down cycle alternating at 1/60 per second servers as a neutral, you are only required to ground (green) the frame of the motor for safety. This is similar In a single phase motor wired for 240v (2 phases) the same thing happens and you are only required to ground (green) the frame of the motor for safety. From: Ken F

Impedance matching is setting the input impedance (load) equal to the fixed output impedance (source) to which it is connected, in order to maximize the power transfer.
Matching is obtained when Zload = Zsource.
In audio and sound engineering we have really no impedance matching. There is only impedance bridging. Zload >> Zsource.

Scroll down to related links and look at "Impedance bridging - Wikipedia".

What is universal remote control code for air-con?

it contains mainly

1.cathode

2.anode

3.anode

4.filament

5.filter

6.belligerence window

copper

8.tungsten filament

9.lead plate

vaccum, x-ray