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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
A common-source (CS) amplifier is a type of field-effect transistor (FET) amplifier configuration that provides voltage amplification. In this setup, the input signal is applied to the gate terminal of the FET, while the output is taken from the drain terminal. It is characterized by its high input impedance and moderate output impedance, making it suitable for interfacing with high-impedance sources. The CS amplifier is widely used in analog circuits due to its simplicity and effectiveness in amplifying signals.
What is the basic principle of ADC?
simple comparator technique.
An analog-to-digital converter (abbreviated ADC, A/D or A to D) is a device which converts a continuous quantity to a discrete time digital representation.
What is the unit of measures for resistors?
Resistor values are given in ohms. A value may be selected to deliver a specific current at a given voltage. This is given in what is known as Ohm's Law where:
Voltage (V) = Current (A) X Resistance (Ohm)
A 12ohm resistor placed across a 12V battery would pass 1Amp of current and put out 12W of heat.
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How do you know when your capacitor is charged and ready for hook up?
The capacitor charges up when you initially install it and apply 12 volts to the circuit. Its purpose is to smooth out power drops in the 12 volt supply line to the amp. For instance, when the bass hits the speakers, the amperage surge can exceed the amperage the line delivers for a split second, so the capacitor supplies amperage briefly to sustain the power.
Hooking up a small motorcycle battery close to the amp serves the same purpose but is possibly messier because of the potential to leak acid.
If the frequency in AM does not change then how are these sidebands formed?
The process of changing the amplitude of the "carrier" so as to add information to it (modulation) doesn't change the frequency of the carrier. But it does create energy at two other newfrequencies.
The new frequencies are equal to (carrier frequency) plus and minus (the modulating frequency). These are referred to as the upper and lower sidebands.
The upper sideband is an exact copy of the modulating signal, but with every component of it shifted up by an amount equal to the carrier frequency. The lower sideband is a mirror image of the upper sideband, with every frequency component in it reflected about the carrier frequency.
A resistor is a device that resists, or limits, the flow of electric current through itself. The more resistance a thing has, the more it limits current (at the same voltage). In a circuit, resistance and current are inversely proportional. The more the resistance, the more current will be limited and the less current will actually flow. Resistors pay a price for limiting current - they create heat.
In other words, resistors convert electrical energy into heat energy.
It might be convenient to divide resistors into just two groups for this discussion (though there are many possible ways to catagorize them). Resistors might be though of as electronic components, or as thermal elements in a device or equipment. A resistor "sorta" conducts current flow, but it heats up as a consequence to having current "forced" through it by some applied voltage. If the resistor is an appliance, it is probably being used specifically to generate the heat, because the heat is what is desired. We need to dry our hair, or the clothes. We want to make toast or coffee or bacon. Incandescent lights could be seen as resistors, but we don't (usually) use them to generate heat. Heating elements, or thermal elements, are heaters - resistive heaters. In electronics equipments, resistors are included in circuit designs to "develop" voltage and to limit current. They are an integral part of the electronics world, and anyone entering in will be seeing them and solving a number of problems with resistance, current and voltage within a short time of arriving.
What is electronic and electrical engineering?
The subject of Electrical Engineering deals with the utilisation of electrical power to provide us with a richer way of life. Electrical Engineering includes many different topics, from Power Generation and Distribution systems, to Electrical Machines such as motors and transformers, to Electrical Appliances such as electric toasters, refrigerators and freezers, televisions, etc. In general such items are all built using many different kinds of electrical components. (Wires and cables, resistors, capacitors, inductors, lamps, batteries, etc. are examples of just a few different electrical components.) Electronics Engineering is a specialised branch of Electrical Engineering which deals with components such as semiconductor diodes, triodes, transistors, computer and similar microcircuit chips, printed circuit boards, etc. Depending on where they are to be used (the applications), electronic circuits can be built to handle a very wide range of power, ranging from such things as radios, computers, mobile phones, which can require power in a range of a few mW (mW = milliWatts = thousandths of a Watt) to less than 100 Watts, to much more powerful circuits for things such as power control systems for things which can generate or consume many MW. (MW = MegaWatts = thousands of Watts.)
How do you specify the rating of the shunt?
1)may be voltmeter or clipon meter will be connected across the winding.
2)or in motor winding
we must find amp current and aramture resistance nd then find the ratings
3)formula is rated kva of motor*1000/base kva for transmission line.
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current doubles
AnswerIt depends on whether the wire is ohmic or non-ohmic. If it is ohmic, then the current will also double. If, like tungsten, it is non-ohmic, then it depends.... because doubling the voltage will cause its resistance to increase.
Ohmic materials obey Ohm's Law, whereas non-ohmic materials do not.
Technically no it isn't that dangerous but it can still hurt and fuse electricity up your arm
SMD = Surface Mounted Device.
The legs and contacts on the device are designed to be soldered onto the surface of the circuit board, on the same side as the device.
It provides for a smaller profile and designed for attachment by automated processes.
What will happen if the signal frequency is greater than cut-off frequency in a waveguide?
If the signal frequency exceeds the cut-off frequency in a waveguide, the wave will not propagate through the waveguide and will be attenuated. This is because the waveguide is designed to support only certain modes of propagation, and frequencies above the cut-off do not satisfy the waveguide's mode conditions. Instead, the signal will either reflect back or be absorbed, leading to a loss of signal strength.
Define thyristor controlled braking resistor?
A braking resistor is used in motion systems where a motor in controlled by a drive. Typically, these are high-speed servomotors controlled by a servodrive. When accelerating, electrical energy is converted to a mechanical force to move a mass. When decelerating, that kinetic energy is converted (via the motor) back into electrical energy, and must go somewhere. To brake quick enough, the energy must be dumped into a power resistor, to be dissipated as heat.
A thyristor (also known as a silicon-controlled rectifier or SCR) is a diode which has a gate terminal on it. Current at the gate allows the thyristor to go into a conducting mode, allowing current to pass.
Modern drives will detect when their DC bus voltage reaches a certain threshold (from the energy being returned from the motor during braking) and begin triggering the thyristor periodically (typically PWM, pulse-width modulation) to disperse this energy as heat.
See links.
Where is interrupt vector table of 8086 Is it in the RAM or ROM?
Actually By Default this is present in BIOS(ROM) and at the boot time Operating System loads it to the RAM.
unlimited
most radio supply outfits will provide an antenna mast to 78 inches, but you can get your machine shop to make a longer mast for a few $$$ extra
Ohm's Law says Volts = Current x Resistance so R = 110/6.2 = 17.742 Ohms
