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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 do you convert voltmeter to ohmmeter?
First you will need a constant current source. Do NOT connect the voltmeter to the constant current source without the resistor to be measured already connected. Do NOT use a battery, it is a voltage source. Then follow these steps to measure a resistor:
- connect the voltmeter across the resistor to be measured
- connect the voltmeter-resistor combination across the constant current source
- read the voltmeter and record the voltage
- disconnect the voltmeter-resistor combination from the constant current source
- disconnect the voltmeter from the resistor
- calculate the resistance from the measured voltage and current from the source with Ohm's law in this form: R = V ÷ I
Why you use 250 Ohm resistor in series with HART protocol communication?
You need to use the 250 Ohm resistor in series with HART protocol communication because it acts as a shunt resistor.
How do you use a multimeter to measure the current in a lemon?
You will need to add an anode and cathode, such as a penny and a nickel. Then add a load resister and use an amp meter to measure current flow, which will change depending on resistance. Measuring the potential current would prove more difficult.
2,250Ω
What will be out put wattage on convertion of 200 watt 12 volt DC to AC through inverter?
About 180 watts assuming a 90% conversion efficiency.
What is the total capacitance of 30 micro-farad capacitors connected in parallel?
In parallel, add the microfarads.
How do you remove coating on circuit boards?
That will depend on the type of coating used as there are many, some of which are trivial to remove whereas others cannot be removed without using means that irretrievably damage the circuit board itself.
However assuming you are referring to the common green varnish coating used on most commercial circuit boards, this can be removed with an ordinary paint stripper chemical that is effective on varnish and an acid brush. Just make sure to wash off the stripper residue with good quality circuit board cleaner (not water).
Why zener diode is called reference diode?
They are frequently used to provide a voltage reference in voltage regulators.
What you do to obtain perfect dc output with no ripple?
This can only be done using a voltage regulator.
Why kirchhoff law are not applied to high frequency circuit?
They are, but you must correctly account for parasitic effects.
The equation you are looking for is R = E/I. The question wants to see if you know how to convert mA to amps. Do the conversion and then use the equation and you will have your answer.
What is ment by high resistance and low resistance on a meter?
On a multimeter, a high resistance would indicate a high Ohmic value and a low resistance would indicate a low Ohmic value. Specific values would be relative to device you are measuring.
When a carrier is phase modulated with an integrated modulating signal the resultant is?
It gives frequency modulated signal
Why humans not listen to very low frequency vibrations?
Most humans are incapable of hearing frequencies slower than about 20 Hz.
What does uniterruptible power supply mean?
An uninterruptable power supply is a power device for a computer (or other things) which is designed never to lose power in the middle of crucial operations. For example, if you're running a computer which is in charge of a critical process and there is a disruption in the power coming into the computer, the uninterruptable PSU (power supply unit) is designed to make sure the computer doesn't stop the process it was working on and lose data.
Which is better semiconductor si or ge?
silicon has several properties that make it preferable to germanium, the main ones being:
- higher junction temperature of operation without damage, 150C vs. only 60C
- silicon dioxide is a stable insulator making passivation, inexpensive plastic packages, and monolithic ICs possible vs. germanium oxide is a powdery water soluble solid requiring expensive hermetically sealed metal or glass packages
- silicon is more abundant than germanium on the earth
Electric cmarator working on the principal of amplifier and digital sigital signals true or false?
The electric motor does not work on the principle of the amplifier and the digital signals.
How do you barrier voltage is developed?
The integration of the electric field across the depletion region is what develops the barrier voltage.
Why the resistor does not have polarity?
they do not have any electrical property that is polarity sensitive
Why are fewer action potentials recorded at R2 when TTX is aaplied between R1 and R2?
TTX will block the response at R1 but have no effect at R2
Why master slave jk flip flop is preferred over jk flip flop?
A plain JK flipflop is unreliable as it is enabled by the level of the clock, not the edge. In a master-slave flipflop, the master section captures the new state based on the inputs while the clock level is high, then the slave section captures the new state from the master while the clock level is low. This has the effect of making the flipflop act as if it was falling edge clocked but retains the simplicity of design of flipflops that are level enabled.
What is the variable and unit of measurement for voltage?
two actos and forty four percent of 30 actos
