Electronics Engineering

It's called a deflection coil. If a c.r.t. uses magnetic deflection, there will be two deflection coils, a horizontal one and a vertical one.

Fidelity is the quality with which the original frequencies are reproduced at the receiver.

It consists of dielctric substrate with a strip conductor on one side and complete conducting layer on the other. It is basically an open structure and requires high dielectric constant substrate to confine the fields near the strip conductor

With an AC and a DC voltage source in series, the DC voltage can be added to the RMS value of the AC voltage to give the effective voltage.

Gain, in the common emitter amplifier, is beta (hFe) or collector resistance divided by emitter resistance, whichever is less. Substituting a different beta (hFe) transistor will affect gain, if hFe is less, or increase stability and design margin, if hFe is greater.

coupling capacitors are generally used to couple the the AC component of voltage to the DC component(biased voltage) of the transistor amplifier .

As we know that the capacitor itself has some reactance which is variable with the applied frequency

Rc=1/wc

where w=frequency in radians

= 2*pi*f

and f= frequency of circuit.

and, V=VC+VIN

VC= voltage drop on capacitor

VIN= resultant voltage available for the transistor for amplification

so as,

frequency increases

reactance decreases

drop on C decreases

so, voltage available for transistor increases

and now you can analyse yourself for the case if frequency decreases

In a properly matched antenna, signal does not reflect back - the transmission line and antenna combination is seen, electrically, as an infinite line - so there is no reflection - again, when properly matched.

A Flow Transducer is also known as a flow senser. A flow senser is used to sense the flow rate a fluid flows or flow logger to record the flow of the fluids that run through them.

For medium length lines the shunt capacitance is uniformly distributed along the length of transmission line..

For simplicity in the calculations,

Now in T method the tolal line capacitance is lumped or concentrated at the mid point of the line.While in Pie method the capacitance is divided into two halves whith one half lumped near sending end and other half near the receiving end,The capacitor near the sending end does not contribute any line voltage drop but it should be added with line current to get lotal sending end current.

A car's wiper system is designed to keep the windscreen (windshield) clear of rain. It consists of a synthetic rubber blade, held on a resilient arm which is pivoted at one end. The arm oscillates back and forth such that the rubber blade sweeps across the windscreen and disperses the rainwater.

Its function is aided by including jets which can spray water containing a detergent on to the screen.

Allows 1 way current/voltage flow

Yes, but it is not very useful in open loop mode. In open loop mode, unless you happen to be very lucky (as in extraordinarily lucky, meaning you won't be) the output will be pegged to one of the two rails. The op-amp will be operating in saturated mode instead of linear mode, and its response time will suffer. You could also damage the op-amp.

Because it can control input voltage in both halves of cycle.

Not very, but you want to look for a E300, much better. and usually people sell them because the batteries go bad, so its better to buy new, or be prepared to fork out 80 bucks for new batteries

All transformers are a.c. machines.

ac(Alternating Current ) has the high polarity.

The heterojunction bipolar transistor (HBT) is a type of bipolar junction transistor (BJT) which uses differing semiconductor materials for the emitter and base regions, creating a heterojunction. The HBT improves on the BJT in that it can handle signals of very high frequencies, up to several hundred GHz. It is commonly used in modern ultrafast circuits, mostly radio-frequency (RF) systems, and in applications requiring a high power efficiency, such as RF power amplifiers in cellular phones. The idea of employing a heterojunction is as old as the conventional BJT, dating back to a patent from 1951.

germanium

Yes, but the sensitivity and frequency response will be very poor. The diaphragm on a microphone, corresponding to the voice coil and cone on a speaker, is extraordinarily light and compliant.

Transmitter section multiplexes baseband signals and modulates it with a carrier,then frequency translates IF to RF by frequency synthesizer and mixer. combines the power to transmit through a antenna before passing it through high power amplifier and bandpass filter.

Receiver section passes RF through a band pass filter and low noise amplifier. Downconverts RF to IF by tunable local oscillator and mixer. further the signal is demodulated and demultiplexed before sending to ground communication equipments

Any hobby shop that deals in models should carry this type of motor.

If you don't have the manual for this, you should go to Wal-Mart and see if they can get one for you. It is Wal-Mart's house brand.