Electronics Engineering

4

VSWR=Zo-ZL/Z0+ZL since open circuited ZL=infinity so VSWR=infinity

Cut off frequency is that frequency at which the power output of the circuit reduces to half of its power in pass band. Power (P)= Current2 X Resistance. so to reduce the power by half we need to reduce the current by 1/sqrt{2} = 0.707 = 3 db. So it's also called half power frequency.

http://enter4joy.com

To step up or step down a particular voltage using the principle of electromagnetic induction. This is a potential transformer.

Transformers are also used to step up or step down current. Current transformers are used extensively in instrumentation applications.

Current and voltage are inversely proportional.

single phase fully control converter

scr is active component because it's generated energy or amplified energy

Current, time are charge are related by the following equation:

Q = It

where Q = charge, I = Current, t = time in seconds

so substituting the values,

Q = 3 * ( 2 * 60 * 60)

Q = 21,600 C

It depends on the nature of the circuit. In a purely-resistive circuit, the current would rise immediately because resistance merely limits its value, it doesn't oppose any change in current. But in a resistive-inductive circuit, for example, the inductive component opposes any change in current, so the current will rise more gradually.

E = I x R. Transpose equation for R. E = volts, I = amps, R = resistance (ohms).

reduced flow of current

Yes. As long as they are on the same frequency you can use as many as you want.

It is a one word name ; 'Calculus'.

good things

Definition: A device for storing digital information that is fabricated by using integrated circuit technology. Also known as integrated-circuit memory; large-scale integrated memory; memory chip; semiconductor storage; transistor memory.

Semiconductor memory is an electronic data storage device, often used as computer memory, implemented on a semiconductor-based integrated circuit. Examples of semiconductor memory include non-volatile memory such as Read-only memory (ROM), magnetoresistive random access memory (MRAM), and flash memory. It also includes volatile memory such as static random access memory (SRAM), which relies on several transistors forming a digital flip-flop to store one bit, and dynamic random access memory (DRAM), which uses one capacitor and one transistor to store each bits. Shift registers, processor registers, data buffers and other small digital registers that have no memory address decoding mechanism are not considered as memory.

Data is accessed by means of a binary memory address to the memory. If the memory address consists of M bits, the address area consists of two raised by M addresses per chip. Semiconductor memory are manufactured with a certain word length (number of 1-bit cells sharing the same memory address) that power of two, typically M=1, 2, 4 or 8 bit per chip. Consequently, the amount of data stored in each chip is MN2 bits. Possible figures are 1, 2, 4, 8, 16, 32, 64, 128, 256 and 512 bit, kbit, Mbit, Gbit and Tbit, here defined by binary prefixes. By combining several integrated circuits, memory can be arranged for a larger word length and/or address space than what is offered by each chip, often but not necesserily a power of two.

It's only low if it's 0

It's double the frequency of the power source.

Just as a second is a fractional part of a minute (1/60th) and an hour is a fractional part of a day (1/24th), a nanosecond is a fractional part of a second, which is one-billionth (1/1,000,000,000). In this regard, the nanosecond should not be considered as something "created". Instead, it is a quantity that exists because it fits well with our understanding of numbering systems and with our ability to conceptualize and to measure the passage of time. The nanosecond becomes useful in the development of radar, computers, data processing networks, and other advanced technologies, as does its smaller division "the picosecond", which is one-trillionth of a second (1/1,000,000,000,000).

no, the shared base of a transistor between the emitter & collector must be thin to get the transistor effect. the thinner the better for high frequency transistors. this cannot be faked using individual discrete diodes.

There are no free electrons and holes in a pure semiconductor at 0k.

energy

as far as i know eddy currents will work on any material as long as the material to be tested is conductive...and it also depends on the penetration to where its being applied

Skinner