Electronics Engineering

If the voltage applied across the resistor remains constant, then as the resistance of the resistor decreases, the current through it will increase. Consider Ohm's Law: E = IR In this formula, in order for 'E' to remain constant as 'R' decreases, 'I' must increase. Another form of Ohm's Law: I = E/R If 'E' remains constant, then the value of the fraction increases as its denominator 'R' decreases.

A wireless LAN or WLAN is a wireless local area network, which is the linking of two or more computers without using wires. WLAN utilizes spread-spectrum or OFDM modulation technology based on radio waves to enable communication between devices in a limited area, also known as the basic service set. This gives users the mobility to move around within a broad coverage area and still be connected to the network. For the home user, wireless has become popular due to ease of installation, and location freedom with the gaining popularity of laptops. Public businesses such as coffee shops or malls have begun to offer wireless access to their customers; some are even provided as a free service. Large wireless network projects are being put up in many major cities. Google is even providing a free service to Mountain View, California and has entered a bid to do the same for San Francisco. New York City has also begun a pilot program to cover all five boroughs of the city with wireless Internet access. A wireless LAN or WLAN is a wireless local area network, which is the linking of two or more computers without using wires. WLAN utilizes spread-spectrum or OFDM modulation technology based on radio waves to enable communication between devices in a limited area, also known as the basic service set. This gives users the mobility to move around within a broad coverage area and still be connected to the network. For the home user, wireless has become popular due to ease of installation, and location freedom with the gaining popularity of laptops. Public businesses such as coffee shops or malls have begun to offer wireless access to their customers; some are even provided as a free service. Large wireless network projects are being put up in many major cities. Google is even providing a free service to Mountain View, California and has entered a bid to do the same for San Francisco. New York City has also begun a pilot program to cover all five boroughs of the city with wireless Internet access.

1)Lower frequencies, shorter range, smaller bandwidth.

2)More power required because, in amplitude modulation we are transmitting 3 frequencies i.e, carrier, lower side band and higher side band. the carrier have no any information but it required 2/3rd power.

3)The two side bands have same information so there is no need of transmitting the two side bands.

as the atom cools down it comes back in its orignal shape .it will be in its contracting form

Copper is cheap as compared to silver which is much a better conductor. The number of free electrons(those which have escaped from the shackles of nucleus but roam free in the lattice) is very high in these. Free electrons are the cause for conduction. More free electrons means more conduction

gold is applied as a micro-thin layer over the entirety of the circuits to protect them from oxidation.

Gold is not on "the entirety" of the board, just the connector contacts. The rest of the copper traces can either be protected with tin (its cheaper) and/or a "mask" of green insulating varnish.

A continuity tester is sometimes referred to as a "bell set". To make one, procure a battery, an electric bell or buzzer, and some wire. With wire 1, connect one battery terminal to one side of the bell. With wire 2, momentarily connect the other battery terminal to the other side of the bell, and note the buzzer sound. Any time you complete the circuit, you will hear that sound.

Now create these connections: battery+ => wire1 => bell => wire2 => component => wire3 => battery-

If the unknown "component" conducts current, then you will hear the bell, otherwise there is a fault.

Electricity travels through a circut. A circut id domething that goes around, completeing a loop. Think of NASCAR. The cars are going around and around, doing laps around the track, which is a circut.

an ampmeter.

Most DVM's have them, or you can use a clamp on style.

to amplify a small signal to sufficient level,so that it can travel to a large distance from first stage till the last stage

It means that you have the following three elements in series: R (resistance), L (inductance), C (capacitance).

It means that you have the following three elements in series: R (resistance), L (inductance), C (capacitance).

It means that you have the following three elements in series: R (resistance), L (inductance), C (capacitance).

It means that you have the following three elements in series: R (resistance), L (inductance), C (capacitance).

1.Sync. ckts all f/fs are clocked by single clock.

Async. ckts o/p of f/f becomes clk for next f/f.

2. Sync ckts are fast.

Async ckts are slow.

3.Sync.ckts are easy to design.

Async.ckts are difficult to design.

2

Voltage source inverters use the dc voltage (e.g a capacitor in parallel) as a source while the current source inverer (inductor in series) use the dc current as a source. Please note that voltage can not be changed abruptly in capacitor as current can not be changed abruptly in inductor.

To convert watts into amperes you divide the circuit voltage into the watts. Amps = Watts/Volts.

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Converting Watts to Amps

The conversion of Watts to Amps is governed by the equation Amps = Watts/Volts

For example 12 watts/12 volts = 1 amp

Converting Amps to Watts

The conversion of Amps to Watts is governed by the equation Watts = Amps x Volts

For example 1 amp * 110 volts = 110 watts

Converting Watts to Volts

The conversion of Watts to Volts is governed by the equation Volts = Watts/Amps

For example 100 watts/10 amps = 10 volts

Converting Volts to Watts

The conversion of Volts to Watts is governed by the equation Watts = Amps x Volts

For example 1.5 amps * 12 volts = 18 watts

Converting Volts to Amps at fixed wattage

The conversion of Volts to Amps is governed by the equations Amps = Watts/Volts

For example 120 watts/110 volts = 1.09 amps

Converting Amps to Volts at fixed wattage

The conversion of Amps to Volts is governed by the equation Volts = Watts/Amps

For Example, 48 watts / 12 Amps = 4 Volts

Explanation

Amps are how many electrons flow past a certain point per second. Volts is a measure of how much force that each electron is under. Think of water in a hose. A gallon a minute (think amps) just dribbles out if it is under low pressure (think low voltage). But if you restrict the end of the hose, letting the pressure build up, the water can have more power (like watts), even though it is still only one gallon a minute. In fact the power can grow enormous as the pressure builds, to the point that a water knife can cut a sheet of glass. In the same manner as the voltage is increased a small amount of current can turn into a lot of watts.

DC is more powerful, the actual ratio is 1.732AC=DC

c over "nu"

Diodes allow electricity to only flow in one direction, thus converting alternating current (a.c.) into direct current (d.c.). They also allow electrons to flow one way only (until reverse breakdown occurs - then current may flow in both directions).

Diodes are often used in both domestic and industrial applications and they are especially useful in electrical circuits.

No component is perfect. All have tolerances that can vary. If you construct a simple circuit where a 10 volt power supply feeds a 10 ohm resistor, you would expect to measure a current of one ampere. BUT - the wiring has some resistance too. This adds perhaps 0.1 ohms to the circuit. The resistor has a +-5% tolerance. If it is 5% high, it may measure 10.5 ohms. That's a total circuit resistance of 10.6 ohms. The power supply may have a tolerance of +-1%. Suppose it's 1% low. That's an output of 9.9 volts in real life. So you have 9.9 volts dropped across 10.6 ohms. you will measure closer to 0.934 amps instead of 1.000 amps. To make matters worse, most electronic components have a temperature coefficient, that is, their values change with different temperatures. You may get a completely different reading tomorrow if the temperature is different! Finally, with current measurements in particular, you are inserting the ammeter in series with the circuit under test. Ammeters have some inherent resistance too, so by putting the ammeter in the circuit, you are changing the very current you are trying to measure (a little)! Oh yeah, the ammeter has a tolerance too. Its reading may be off a little even if everything else is perfect. Sometimes you have to wonder how we get a decent reading at all. Fortunately the errors are usually fairly small, and not all tolerances are off in the same direction or off the maximum amount. They tend to cancel each other out somewhat. BUT - in rare circumstances everything CAN happen like I said, and the error can be huge.

I don't think it has. Bandwidth depends on the diameter to length ratio of the antenna. The greater the diameter of the elements the wider the bandwidth. The inductance goes down and the capacitance goes up, giving the antenna a lower Q. the folded dipole has a greater effective diameter (at least double for the same materials). You can increase a normal dipole's bandwidth by increasing the diameter, hence the old time birdcage aerials.

To measure the voltage across a bulb, you would connect a voltmeter in parallel with the bulb. This configuration allows the voltmeter to measure the potential difference across the bulb without significantly altering the circuit's operation. Connecting it in series would prevent the proper function of the circuit and could potentially damage the voltmeter.

First to the stop, first to go. Yield to the left. Absolutely WRONG 4 ways means you must stop and proceed one at the time safely. It has nothing to do with first or last. There maybe one car on each stop and a long line to one stop sign it means you must wait your turn until it is your turn to safely proceed.

A: The use is for transferring 8 bits of data from a parallel source into a 3 state bus Since it is 3 state 8 bits "D" flip flops it has an output control qt pin 1 if hi the flip flops are no care or floating in the 3 state