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Electronics Engineering

Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.

24,372 Questions

What is the impedance of a RG-11 cable?

The impedance of RG-11 coaxial cable is typically 75 ohms. This characteristic impedance makes it suitable for applications such as cable television and broadband internet, where minimizing signal reflection and loss is crucial. RG-11 cables are thicker than standard RG-6 cables, allowing for lower attenuation over longer distances.

How do you define Repetitive Peak off-state Voltage VDRM?

If the MT2 voltage exceeds VDRM such as might occur during severe and abnormal mains transient conditions, MT2-MT1 leakage will reach a point where the triac will spontaneously break over into conduction.

What is close contact relay?

A relay is an electrical switch. It consists of a electromagnetic coil and a set of mechanical contacts. Depending on the relay their could be multiple sets of mechanical contacts.

The close contact lets current flow through the mechanical contacts when the relay is not turned on. When the relay is turned on current flow is stopped. This is called a normally closed contact or NC

The open contact works the opposite of the closed and is referred to as a normally open contact or NO

What is the difference between heterodyning and superheterodyning?

When you combine signals of the same or different frequencies. The resulting energy will be each original frequency and the sum of the frequencies and a frequency that is the difference of the two signals. This is the basis of heterodyning. This allows us to take an information signal and "upconvert" it to the RF realm for transmission. But the same processes can be used to "downconvert" or to beat one signal against the other to get a lower frequency representation of the energy. After hererodyning came out, newer radios were sold as superheterodyning as a marketing ploy. Sorry, but it is not more complex than that. This was back in the early 20th century and the idea of fair marketing or truthful processes were not legal issues like today. Have a nice day. Bob

How does current flow around a circuit?

current in a circuit will flow in a unidirectional manner

and when it passes through a resistor in the circuit it opposes its direction

Why emitter follower is used in circuits?

The (Class C, Common Collector) Emitter Follower is used to amplify the available current from a voltage driving circuit that might be disturbed by the load impedance.

If the actual voltage value is important, the emitter follower is often teamed up with an opamp which sets the emitter voltage based on the input voltage.

What is a Digital Validation report used for?

To verify that a record was reviewed and accepted by the soldier it belongs to

What is the final stage of a transmitter in telecommunication?

The power amplifier that drives the antenna.

In CW transmitters and some AM transmitters this stage is also the modulator, in others (and in non-AM transmitters) the modulator is in an earlier stage.

Explain why coiling the wire increases the total magnetic force?

Each coil of wire generates its own magnetic field, and if you have numerous coils, all those individual fields will combine into one stronger field.

How can you find a resistance of resistor without DMM explain the method with the help of example?

Hi

You can find the value of the resistor by using colour code printed on the resistor.

1. Hold the resistor such that the colour code starts from left.

2. Each of the colour bands present on the resistor specifies a value.

3. The first colour band represents the first significant figure, the second band represents the second significant figure and the third band indicates the multiplier. The fourth band represents the tolerance.

Gold band- 5%, Silver band-10%, No band-20%

4.Find the appropriate values for the colour by using the chart 1.

5. Find the value of the resistor by using the formula 1.

Chart1

Example:

Here first band represent brown.

Second band represent black.

Third band represent red .

Fourth band represent gold.

The value of resistor = 10 x 102 ± 5%

= 1kΩ ± 5%

Does frequency effect total inductance?

Inductance is inductance, and is not a function of frequency. Frequency affects reactance, and ultimately impedance, not inductance.

What is lowlevel amplitude modulation and highlevel amplitude modulation?

low level amplitude modulation occurs when the carrier signal is first modulated and then amplified,whereas in high level modulation,the carrier signal is first amplified and then is modulated.

What is the relationship with leakage current and rated voltage of high voltage surge arrester?

Not much actually; Electrons escaping through insulating material is defined as leakage current. Insulation has both resistsance and capacitance abilities, which means current can flow through both paths. Given the nature of current it will find the quickest path. A surge arrestor dissipates (discharges) voltage spikes through a series of resistors and diodes. A surge arrestor is commanly used in applications above 100kv. Dnot confuse a surge arrestor with a surge protector, whch is basically a circuit breaker. FIRST OF ALL THERE IS NO PERFECT INSULATOR AND ELECTRONS DO NOT ESCAPE BUT THE EMF IF HI ENOUGH WILL FIND A PATH TO BLEACH ELECTRONS BECAUSE OF DIRT MOISTER WHATEVER.

What will a UPS be used for in a building?

To provide power to essential equipment

ANSWER: it does not provide any power at all Not until there is a input power interruption then the UPS will take over the function of providing power to the building or even facility.

Uninterpretable Power System It works continuously as a bypass without power delivery to the facility.

What is the functions of led flashlight?

same as any other flashlight, So you can see better in the dark. Since the power consumption of LED is far roo less for the same lighting condition, battery life is more.

What is oscillatory discharge?

Alternating current of gradually decreasing amplitude which, under certain conditions, flows through a circuit containing inductance, capacitance, and resistance when a voltage is applied is known as Oscillatory discharge.

Characteristic curve MOSFET?

http://www.physics.csbsju.edu/trace/nMOSFET.CC.html

What are advantages of ac bridges?

ac bridges give the value of impedances like inductance, capacitance with high accuracy. it also tells us about the quality factor .