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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

How many ohm is a mega ohm?

1 megohm is 0.1 gigaohm.

1 gigaohm is 1000 megaohm.

1 megohm = 1,000,000 ohms = 106 ohms.

1 gigaohm = 1,000,000,000 ohms =109 ohms.

What are the semiconductor materials used in computers?

A material that is neither a good conductor of electricity (like copper) nor a good insulator (like rubber). The most common semiconductor materials are silicon and germanium. These materials are then doped to create an excess or lack of electrons. Computer chips, both for CPU and RAM (or memory), are composed of semiconductor materials. Semiconductors make it possible to miniaturize electronic components, such as transistors. Not only does miniaturization mean that the components take up less space, it also means that they are faster and require less energy.

How the current in a circuit changes if the voltage in the circuit is decreased and the resistance remains the same?

If the ratio of voltage to current is constant, then the circuit is obeying Ohm's Law. If the ratio changes for variations in voltage, then the circuit does not obey Ohm's Law.

How do you convert peak voltage to peak-peak voltage?

Simply multiply the peak voltage to 2 and you will get the peak to peak voltage.

How the modem change the analog signal?

MODEM stands for modulator/demodulator. Outgoing it modulates a carrier wave with information and transmits this data on a wire or through the air. When it receives a modulated signal it demodulates the signal and separates out the information.

What ways can voltage be produced?

Voltages are produced by converting one form of energy into electrical energy. Mechanical energy can be converted into electrical energy (voltage and current) by moving a magnet or magnetic coil in proximity with a stationary coil, connected to an electrical circuit.

A voltage can also be produced with a chemical reaction. Batteries and fuel cells convert energy in specially designed cells, where a chemical reaction causes a voltage to exist across two electrodes implanted at two different parts of the cell.

A voltage can be produced by the interaction of light on a photocell. The photons of light interacting with atoms in the photocell, cause an electron to be ejected. The special design of the photocell causes this to occur in such a manner as to produce voltage across the cell.

A voltage can be produced by subjecting a thermocouple to differential temperature. A thermocouple is a relatively simple device composed of two dissimilar metals, joined together at what is referred to as a thermal junction. If one side of the junction is warm, relative to the other side of the junction, a voltage exists across the junction.

What is the advantage of capacitor filter over inductor filter?

An inductive filter is in fact an LC circuit in which an inductor is connected in series with the capacitor. This arrangement is also known as a low-pass filter. http://www.answers.com/topic/inductive-filter

Can a pn junction diode be used as an amplifier?

Never. It is impossible to use diodes for amplification.

What is the time constant of a series RC circuit consisting of a 2000 ohm resistor and a 10 microfarad capasitor?

In an RC network,the Time Constant τ (tau) is calculated as shown below. τ = RC For a 10 kOhm and 100 microFarad RC network: τ = 10000 x 100x10-6 τ = 1 second

True power divided by apparent power?

Real Power: The actual power in Watts or K-Watts in AC or DC Circuits Apparent power: The Power in Inductive or Capacitive Circuits have Phase Lag & Lead measured in Volt Amperes VA or Kilo Volt Amperes KVA

Why AC is generated instead of DC?

Alternating current is much more efficient to transmit than direct current. Using transformers, it can be stepped up to high voltages for transmission over long distances using relatively small conductors, and then stepped down at the destination to provide high current.

What is an electrical device that converts ac to dc?

if its already an ac y u need to convert!......Yes it need to change because in ac supply we need to change the frequency of current so ac to ac converter needed.The name of AC to AC converter is Regulator

What is a tactile signal?

Tactile signals are signals detected by the skin and internal organs such as touch, pain, vibration, heat etc. They are coded by mechanoreceptors which respond to mechanical distortion of the sensory nerve membrane.

What is the difference between digital and analogue?

This is the part of electronics consisting of such circuits which processes analouge quantities is called analogue electronics. And the part of electronics which provides the data in the form of a maximum and minimum voltage signals i.e. By two voltage levels only is known as digital electronics.

What electronic devices contain transistors?

Practically everything. Even devices using electron tubes (e.g. microwave cookers, high power radio and TV transmitters) now generally use transistors to control the tubes.

Which one of the following statements is true concerning an ac circuit that contains both resistance an inductance?

When an AC circuit contains both resistance and inductance the current and voltage will be in phase. This means having waveforms that are of the same frequency and that pass through corresponding value.

What are sleep transistors?

A rest transistor is either a pMOS or nMOS high VT transistor and is utilized as a change to close off force supplies to parts of a configuration in standby mode. The pMOS rest transistor is utilized to switch VDD supply and henceforth is known as a "header switch."

What is an example of a DC power source?

Anything that works on a Battery is a DC (Direct Current) like Cellphone, Flashlight, ipad, ipod and you laptop.