Electronics Engineering

Programmable Logic Controller (PLC) is widely used in Industrial automation system. It has a power supply, memory, processor and input output cards. Field signal are connected to INput output devices

The quantum mechanical energy band where electrons reside in semiconductors that participate in interatomic bonding.

scr is basically a three terminal device can be used as diode by leaving one terminal

All residential loads are connected in parallel, so that they share the same supply voltage, which is necessary for them to develop their rated power outputs.

it can't handle more power than that rated wattage. exceed the rating and it burns out.

twice the input frequency

To replace a capacitoræyou must make sure that the replacement capacitors voltageæis equal or greater than the original, the microfarad (or strength rating)æis +/- 10 % of the original runæcapacitor, the microfarad of theæstart capacitor is +/- 20% of the original, for capacitors that are wired in parallell the microfarad must be equal to the sum of the individual capacitors, for capacitors that are wired in series the microfaradæis equal the reciprocal of the sum of the reciprocals of the individual capacitors.

A thyristor, also known as a silicon controlled rectifier, is a diode that can be turned on by application of a small gate voltage.

Mesh current is introduced just as an imaginary quantity it flows around a mesh and all branch currents do not change for introducing mesh currents so all branch currents can be represented by mesh currents.

10 ma times 50 ohms is 0.5 volts. 0.5 volts is one two hundreth of 100 volts, so the multiplier resistor on 200 time 50, or 10,000 ohms.

y-parameters :-

I1=Y11V1 + Y12V2

I2=Y21V1 + Y22V2

so to obtain Y11 and Y21

make V2=0 , (shorting the output terminals)

Y11=I1/V1

Y21=I2/V1

so to obtain Y12 and Y22

make V1=0 , (shorting the input terminals)

Y12=I1/V2

Y22=I2/V2

as all the admittance parameters obtained are due to either shorting the input or shorting the output terminals so we ca;; these parameters as short circuit admittance parameters

yes

no

There is no inherent disadvantage of 50 Hz compared with 60 Hz, bearing in mind that systems that run at 50 Hz are designed to run at 50 Hz.

" In electronics, a multiplexer or mux is a device that selects one of several analog or digital input signals and forwards the selected input into a single .here data is a continious flow of siganal...so this is called data selector

Raja chjatterjee MCA,TECHNO INDIA

Breakdown voltage is far greater than barrier potential.

silicon:-

break-down voltage :- 5v - 450 v

barrier potential ;- 0.5v to 0.7 V

an ideal ammeter has zero or negligible resistance when this is connected in series no effective resistance would be added in the circuit so that the value of curret that we get is exactly of the circuit only. but when the ammeter is connected in parllel as it has zero resistance , the resistor to which it is connected in parllel gets shorted and due to his the effective resistance of the circuit is changed and so the effective current ... due to this the w=value measured by the ammeter would be different (incresed due to dec. in effective resistance)

One capable of being used at power rating of greater than about 10 watts, and generally requiring some means of cooling

It is very critical to never exceed the input voltage of an IC to begin with. To calculate the power dissipation ( in watts) VxI (Voltage x Current) will give you power in watts.

DMM

Offset printing is a type of lithographic printing. It uses the principle of the immiscibility of oil and water and takes its name from the blanket cylinder as an intermediate carrier for indirect printing. At present, among various printing technologies, offset printing still occupies a major position, and will continue to develop in the direction of high precision, high quality, high speed, multi-color group, multi-function, and high automatic control level.

The charging and discharge time increases. R*C=T