Electronics Engineering

Current density is unrelated to Ohm's Law.

Switching System

1.Manual Switching

2.Automatic Switching

2.a Electromechanical

2.a.1 Strowger

2.a.2 Crossber

2.b Electronics

2.b.1 Space Division

2.b.2 Time Division

2.b.2.1 Analog

2.b.2.2 Digital

2.b.2.2.1 Space

2.b.2.2.2 Time

2.b.2.2.3 Combination

Power dissipation in a resistor, or any other type of load, for that matter, is measured in watts and calculated as volts times amperes. It does not matter if the resistor is in a series or a parallel circuit, so long as the volts and amperes in the calculation is for that one resistor.

Obviously, volts and amperes is distributed amongst the components of a circuit, and series vs parallel can have a significant affect on that distribution, so you will need to calculate or measure them on a case by case basis.

it makes current wave more smooth

its propogation delay and wire delay..

a demodulator sole function is to restore the original modulating signal. it works by removing the Carrier

To calculate the DG set current, you need the load current and the load voltage. To convert it into kilowatts it is divided by 1000.

It is a circuit that behaves the same way if it is connected in the opposite direction. The term is typically used for components in electrical circuits. For example, a resistor behaves the same way no matter if it's connected left-to-right ot right-to-left. In contrast, a diode is not a bilateral component, because it conducts current in one direction, and does not conduct in the other.

for a collector to base biased circuit find the stability factor s?what is the effect on s for change in current amplification factor?

the pullup or pull down resistance in the diode logic gate makes it a high output resistance device.If u try to drive another diode logic gate with it the output voltage of the first gate will be affected by the resistance in the second gate.A diode logic gate should always drive a high input resistance input.

To limit current flow in a circuit

DC sources are not used for excitation of magnetic circuit of transformers and other AC machines. AC sources are used. The steady-state current is calculated by the applied voltage and resistance of the circuit when DC excitation is applied. The inductance in this case plays the role only for the transient part. The adjustment of the magnetic flux takes place as per the value of current to satisfy the relationship of B-H curve or magnetization curve. For the case of AC excitation, inductance comes into picture for steady-state performance. The flux is determined by the impressed voltage and frequency. The adjustment of magnetization current takes place as per the value of this flux to maintain the relationship imposed by the magnetization ....

Like in modems, you make digital zeros one frequency and digital ones another frequency.

ULN2802 ULN2803 ULN2804A 8 NPN Darlington transistors, connected in arrays ideal for logic interface level digital circuits (eg TTL, CMOS or PMOS/NMOS) and higher current/voltage such as lamps, solenoids, relays, print Hammers or other similar loads, a wide range of uses: computer, industrial and consumer applications. All device functions are transiently suppressed by collector output and clamping diodes. The ULN2803 is designed for standard TTL compliance, while the ULN2804 is manufactured to fit 6 to 15V on high-level CMOS or PMOS. The circuit is a reverse output type, that is when a low-level voltage is an input, the output terminal can be turned on to work.

For more, The ULN2803 and ULN2804 have the same pinout and current parameters. But there is a little difference. The drive voltage of ULN2803 is 5V for TTL and CMOS circuits. The driving voltage of ULN2804 is 6V-15V for CMOS and PMOS circuits.

Reference: The Overview of ULN2804A [FAQ] [ utmel]

A gateless triac is a diac. It is often used in the gate circuit of a triac to balance out the firing voltage for the triac in both quadrants, so that there is no DC offset in the controlled load.

This is because, while the gate trigger voltage is often asymmetric in the two quadrants, the M1/M2 breakdown voltage is often symmetric.

HFE is the gain of the transistor

Block digram of fsk is the representation of fsk modulation

Transducer is a device which convert physical signal into electrical signal ( current/voltage/resistance). for linear measurement we can use LVDT (Linear Variable Displacement Transducer/ Linear Variable Differential Transformer). and for rotary measurement we can use RVDT (Rotary Variable Differential Transformer)

Inductance in an electrical circuit.

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hii this is use full persentation

Two names for practically the same condition. Peak inverse is name whereby the maximum voltage can be sustained. Breakdown is actually the point where a reverse voltage is reached and reverse breakdown has occurred

A strobe signal is sent by the signal sender without any regard to the signal receiver. This assumes that the design provides sufficient setup and hold time, along with transmission time, to ensure reliable receipt of the signal. A handshake signal is a bi-directional protocol between the signal sender and the signal receiver, which the receiver uses to tell the sender that the signal has been received. In this system, it often does not matter what the transmission time is, but bandwidth can be reduced since the sender must wait for the handshake to come back from the receiver, effectively doubling the time it takes to send a signal.

A strobe signal is the name for any signal that flashes on and off. For example the turn-lights on a car. Certain lights such as some leds aren't actually on all the time but flash faster than the eye can see, that is also a strobe signal.