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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 used to measure the current in a circuit and how is it connected?
To measure the current in the circuit an ammeter is used and it is connected in series
What is the resistance of the circuit if the voltage is 230 volts and the current flowing is 5 amps?
The resistance of the circuit will be 46 ohms
What is dominant poles of transfer function?
These are values which make the denominator equal zero, therefore the system described by the transfer function would be unstable near these values.
What is the function of a power source in a circuit?
the function of a power source in a circuit is that it provides a steady source of static electricity
How do you measure the current through a circuit without intercepting the supply?
Add an ammeter in parralel with the circuit. An ammeter in parallel with a circuit to be measured will not measure any current. In fact, placing an ammeter in parallel will cause a short. The ammeter must be placed in series with the circuit to be measured. It should be noted that this technique only allows for small magnitudes of current to be measured. One should not try to measure more than 10 amps using this method. However, this is not the goal of the question asked. I am not 100% sure what "intercepting the supply" means but I think the person asking the question means without breaking the circuit? In this case one could use a clamp on ammeter. There are several varieties that can measure low currents and there are those that can measure 100s of amps.
What is difference between floating load and ground load?
In case of grounded load load is grounded and voltage is measured across it.
while in case of floating load load is not grounded instead it is connected in feedback circuit.
Where do usually series circuit used?
Series circuits are used in areas where the operation of the circuit is required to be linear.
Is the plot of current versus frequency symmetrical about the resonant frequency in LRC circuit?
The plot of current vs. frequency is not symmetric because the equations for inductive reactance and capacitive reactance are not symmetric. One is linear and the other is inverse.
What is modified beer Lambert's law?
The modified Beer-Lambert law is central to the operation of functional near-infrared spectroscopy (NIRS). It describes the amount of light passing through the head. To get to an understanding of this law, however, we will build up from simpler laws and discoveries.
Light is made up of photons. Photons are very special because they act in two very different ways at the same time - as a particle and as a wave. Water can also be thought of as being like this. A drop of rain and a ripple in a lake are made of the same thing - water. Photons of light are little packets of energy smaller than atoms and, since they are waves, that must mean they have a wavelength (which is really just the length of the wave from peak to peak). The light that we see has very small wavelengths. Violet photons of light have the shortest wavelength - only 380 nanometres long (380 millionths of a metre) and red photons of light have the longest wavelength - but are still only 750 nanometres long.
As photons of light move through space, they will come in contact with atoms. If a photon comes in contact with an atom, one of two things will happen: Either the photon will collidewith the atom and bounce off it or the atom will absorb the photon. A photon can only be absorbed by an atom is the photon has the right wavelength.
What is the difference between ac ammeter and dc ammeter?
dc ammeter has three connecting pins while ac has four
Which side of diode is anode and which is cathode on the diode in a schematic?
The anode is the arrow shaped end, while the cathode is the bar shaped end. You can remember this by recalling that current flows from anode to cathode in an ordinary diode; well, that is, if you use the trick of assuming that current is hole flow, rather than electron flow, a useful and common convention. The exception, of course, is the zener diode, where current flows in both directions, but at different potentials. In this case, there are two 45 degree angled bars at the end of the cathode symbol, and the normal configuration of current flow is cathode to anode, backwards with respect to an ordinary diode.
Why FM is preferred for audio signal transmission?
FM also known as frequency modulation is preferred because of the more concise ability to transfer quality sound at the expence of distance. Also FM is not as severely effected by weather as its lower frequency AM counterpart.
What size resistor is needed to drop from 5vdc to 3vdc?
use Ohm's law: to drop 2 volts,
V = I x R
2 = current x resistance
resistance = 2 / current.
So you need to know the current
What is difference between wet corrosion and dry corrosion?
Corrosion is occurs when a metal becomes wet or damp. A current flows through this, making the unmoving particles throught the steel to the more reactive parts on the surface. These are called anodes. The current returns from the more reactive parts, through it, and then back to the the more still parts. Where the current leaves the anode, rust forms.
Wet corrosion happens when a metal or other material is wet or damp- (or can be caused through the mositure in the air)
Dry corrosion is similar, however the difference is that it forms through the presence of gasses in the air
Can you apply forward voltage when anode current fall to zero in scr?
No.
Soon after its anode current falls to zero, the device is not is a state to block the forward voltage due to the presence of carriers in its four layers its still in conduction mode. Thus at first it takes some time to remove excess charge from the four layers.
Thus just after its anode currents decays to zero it is unable to block the forward voltage.
Why parallel resonance circuit is called tank circuit?
- tradition
- it is often used (like a storage tank for water is) to store resonant energy in AC circuits.
What is the voltage drop of a 1k ohm resistor?
It depends on the current going through it.
Ohm's law: Voltage equals current times resistance.
Why potential difference is necessary to produce current in a circuit?
Potential difference, voltage, is a force that will cause electrons (negative charges) to move if they can. Voltage is the motive power behind electron flow, and electron flow is the current. In a battery, we have voltage between (or across) the terminals from chemical energy inside. We don't have to have current flow to have the voltage. Some might think of voltage as "electrical pressure" because it is a force. That isn't a bad way to look at it. If we connect some wires and put a light bulb and a switch in series across the terminals of the battery, we have a circuit. If we close the switch, voltage, which was present all the time, will now cause electrons to flow through the wire and light the bulb. The battery has a positive terminal and a negative terminal. The positive terminal will take in electrons and the negative terminal will send them out. Current flows in only one direction. The potential difference created by the battery has energized the circuit and current flowed from the negative terminal of the battery, out through the circuit, and back to the positive one.
What are the advantages of intrinsic semiconductor?
due to the poor conduction at room temperature,the intrinsic semiconductor as such,is not useful in the electronic devices.hence,the current conduction capability of the intrinsic semi conductor should be increased. this can be achieved by adding a small amount of impurity to the intrinsic semi conductor
What type of diode is used to convert alternating current into direct current?
The type of diode used to convert alternating current in to direct current is the power diode.
How do you convert FM to PM and PM to FM waves?
In order to convert fm to pm, the modulation index must be set to be independent instead of having a variation. Then the receivers must be properly synchronized.
