Electronics Engineering

The definiton of period (T) Is T = 1/f ; Therefore if you know that the period is 2.5 microseconds (=2.5 x 10-6) then the frequency is f=1/(2.5x10-6)= 4 x 105 Hz

Scroll down to related links and look at "Measurement of input impedance and output impedance".

Doping with Group III elements, which are missing the fourth valence electron, creates "broken bonds" (holes) in the silicon lattice that are free to move. The result is an electrically conductive p-type semiconductor.

You can easily look up 'impede' in a dictionary; everyhome should have a dictionary! Impede means to 'oppose'.

It has excellent heat transfer properties.

The reciprocal of frequency is the time period of the wave

A relay or repeater.

EDIT: The bipolar junction transistor

RF (Radio Frequency Coil) is a coil, which is designed to resonate at a frequency some where in the radio spectrum frequency. See L C Circuit Link Below.

Michael parady

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The general relation between distance (d) of a Tx and its power (P) is given by: E=[(30P)^0.5]/d where E stands for the sensitivity of the transmitter in V/m (Volts per meters). E can be assumed 20 uV/m for frequencies below than 200 MHz.

A full and true "quasi complementary symmetry power amplifier" is an audio amplifier whose power output section is typically comprised of 2 of the same NPN output transistors, (generally matched) and 2 of the same PNP or NPN driver transistors, (also generally matched). Driven by dual matching + & - DC voltage power supply voltages. With the exception of the bias control circuit components, each half of the output circuit are exact mirror images of one another. Each half of the circuit amplifies the positive and negative half cycle of the audio signal. The theory is, "it is much more likely to perfectly match the performance of each half cycle of the amplifier by using this circuit design criteria. Only the most esoteric amplifier manufactures used this design in the late 60's and 70's.

Lenz's Law

Current is what is can hurt or kill you.

It is usually 80-100 UF(micro farad)

dirver transistor is added in a circuit so as to provide required voltage at an operating current which can not be provided by the microcontroller

There are several methods for generating FM signals but they all basically involve an oscillator with an electrically adjustable frequency. This type of oscillator uses an input voltage to affect the frequency of its output. For example, when the applied voltage increases, the oscillator output frequency increases and when the applied voltage decreases, the oscillator output frequency decreases as well. If no voltage is applied to the oscillator its output will be a signal at its centre frequency. The amount of frequency variations is deviated around the oscillators' centre frequency.

In the range of 1 x 10^7 1/ohm-m . That's one times ten to the seventh power.

A: A transistor is a non linear device bias is applied to insure proper operation with loads

A waveguide, is a hollow rectangular tube, designed to channel microwaves from the Magnetron to the outside world.

Rather than use a wire, this is found to be the best way to transfer microwaves at 3 cm to 10cm wavelength. (Some 10cm systems use large coax instead)

They are normally found on radar systems, to transfer the signal to and from the rotating scanner to the transceiver unit.

Modern radars keep the length of the waveguide to a minimum, by housing the transceiver in the motor unit of the scanner, instead of a separate room.

1-Whate is rectifire?

2-How does it work(rectifire)?

D. Neon circuit tester. Page # 59 in your book.

Electromagnetic induction is the production of an electromotive force across a conductor when it is exposed to a varying magnetic field. Basically it works because of electricity.

Radar Ranging is an Activity of a RADAR system to measure range of a particular object from the RADAR's own location the object can be aircrafts, ships or other objects like buildings.

Usually Ranging is done by means of transmitting a pulse and receive echoes from it where the range is measured from time differences(or Delay) between departure and arrival of pulse , this ranging method is called as "Pulse Delay Ranging"

Other ranging method is Doppler based ranging where range is measured by means of Doppler effect

EDIT- it seems i need to re-construct the answer