Electrical Engineering

The working principle of ramp type digital voltmeter is that:

It takes measurement of the time that is taken by instrument for its input voltage to change its state from input level to zero level and also the reverse is also true. An digital counter is employed in this system that measured time intervals and gives this output to the display unit that merely displays the output inform of digits with the help of indicating tubes thus making this section to work as output device.

A voltage, referred as ramp voltage, is initiated at the beginning of measurements. Generally used ramp is negative going type but we also use one of positive going type. A continuous comparison is made between ramp voltage and that the voltage under measurement. As soon as, it is found that ramp voltage becomes equal to the input voltage a pulse in formed by coincidence generally called comparator circuit. At the same time value of ramp voltage is also made to fall down till the time when it reaches zero level. When value of ramp voltage has fallen to zero or ground another circuit called ground comparator comes into play and result in to close the gate. Some time is taken by the circuit between opening and closing of the gate can be given by T, now, clock pulse generator circuit generates some pulses during time T that are given to gate as a result of them counting an displaying can be performed. Thus, Input voltage that was initially fed to the instrument is read in digital form.

It employs multi-vibrator circuits that are basically used to determine rate according to which cycles of measurement are started this multi-vibrator is called sample rate multi-vibrator. It is because the initial pulses that are responsible for activation or generation of next ramp voltages are generated by sample rate multi-vibrator as with as multi-vibrator also sends a pulse to counter circuit that makes it to come again to 0 states to clean up the digital display.

check the answer here http://www.mae.wmich.edu/faculty/kamman/ME360ArmatureDCMotorTransferFunction.pdf

it is vry essential for engineering.it may be help fpr microbiology n bio chemistry.afterall it is very needed for the ece,eee,ME students.IN BIOMEDICAL SUBJECT,there are many biological discussion.

the colorimeter is an instrument to measure absorbance of light. wen u select the range 600 pr 540nm or any, it cutts of al othr light n allows nly light of tat range to pass thru it and the digital meter gives the transmittence. by plotting the graph one can estimate the amount of sample present in the solution.

Connected in parallel with the system to reduce overcurrent/losses

An AC (non-polarized), usually high voltage capacitor that is connected in

parallel with an inductive Motor (and very close to the motor, or other

inductive load) to help reduce Reactive Power (Magnetizing AMPS)

which do no real work but only cause extra heat in the wiring and motor

as there is a Lagging Current Phase Angle created by an Inductor and a

Leading Current Phase Angle created by a capacitor which helps correct

the impedance mismatch between line and load.

Google "Reactive Power" and/or "ELI ICE man" for more information.

A cartridge fuse has a cylindrically shaped body (usually glass or ceramic) and has metal endcaps (or 'ferrules' in U.S.) which are designed to engage electrically with a fuse holder. They are designed to be easily replaced by the user without the need for tools. They tend to be used for smaller current ratings (i.e. less than say 100A). Higher current rating fuses tend to have bolted connections to prevent overheating of the connection.

Cross section area =60x10=600Sqmm

For copper we can utilised 2 amps per sqmm

hence we can load upto 1200 amps easily.

Magic, mostly.

Make the device very small, so that the capacitance of the device is small

If you are good in calculus, it is quite simple otherwise it will be very difficult

Quite simple? Let me correct you on that. NO, it is NOT quite simple, whether you are good at calculus or not. That is like saying if you understand the body then medical school is super easy. Neither are. I am currently working on my Associates in electronics. My math skills are fair, not great. I used to work with several electronics technicians and engineers, and my manager had a Masters in EE. Very smart guy and he even said that the course was extremely hard. He is right. I have read several times that electronics and chemistry are two of the hardest majors. I have a friend who is a chemist and he said it was hard, and from my experience in studying electronics, YES, it is VERY hard. However, it is also a very rewarding career if you stick with it and have a passion for it. Lastly, if you choose to go for an engineering degree, get at least a Bachelors, if not a Masters. Anything less won't get you very far. It will be a very hard 4 or 5 years, but totally worth it.

Yes

Due to the physical construction and size of the resistor, at a certain voltage, the insulation will break down and the applied voltage will arc over. This is generally bad. Operating the resistor within its voltage rating will prevent this failure mode.

Diode & Thermsistor

Yes.

Because...

If we connect an alternator to a transmission line of high capacitance the line voltage will increase and caused a line voltage difference, which does not satisfied the

condition of parallel operation of same voltage rating.

[By Akhtaruzzaman08]

The rms of 10V is 6.02V. Take the peak voltage of the sine wave and multiply it by 0.707.

That is 6 amps. One coulomb passing a point once a second is defined as one amp. Take the number of coulombs that have passed the point and divide it by the time it took the charge to pass (in seconds) and you have the current in amps.

If a circuit is grounded through a capacitor it is referred to as AC ground because ac signal can pass through the capacitor DC level is blocked

It has no effect on it whatsoever.

Yet another advantage of electric induction motors is their ability to be connected directly to the AC source. This may not mean much in household uses, but in industrial uses, this can be an important cost saver. Since the basic electric design has graduated into an electronic one over the years, an induction motor is easy to program for its various uses. The initial cost of installing it may be a little high, but it will save money in the long term because of the low maintenance cost and durability of the product. Moreover, it is a flexible design which allows innovations and newer technologies to be incorporated easily without incurring extra costs or necessitating

9kHz to 300GHz.

The purpose is to buffer the input for monitoring purposes

Everywhere, there are probably 10,000 of them in your house. Look in the TV, radio and computer.

A DC motor is any of a class of electrical machines that converts direct current electrical power into mechanical power. The most common types rely on the forces produced by magnetic fields. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current flow in part of the motor. Most types produce rotary motion; a linear motor directly produces force and motion in a straight line.