0
What else can I help you with?
What is uses of tapped coil?
If question is about a transformer's tapped coil then the taps are a way of getting different voltages from one transformer. The end of the transformer's coil is the common point and the taps to this common point will give different voltages depending on where in the coil the taps are taken from.
Why are both negative and positive voltages generated as the magnet passes through the coil?
In this context, 'negative' and 'positive' are used to indicate the sense, or direction, of the induced voltages, as voltages do not have electric polarity (+ or -). The direction of the voltage induced into a conductor is determined by the direction of that conductor relative to the magnetic field. As the coil rotates, the directions of each side of the coil reverse relative to the field, and the induced voltages reverse too.
What is Opto-Coupler IC'S?
to prevent the high voltages The main purpose of an opto-isolator is "to prevent high voltages or rapidly changing voltages on one side of the circuit from damaging components or distorting transmissions on the other side."[2] Commercially available opto-isolators withstand input-to-output voltages up to 10 kV[3] and voltage transients with speeds up to 10 kV/μs.[4]
Why AC is used in preference to DC?
It is much more efficient to transmit AC over long distances. Because using transformers you can convert to very high voltages, and then power transmission then involves much lower currents, so that losses in the transmission line I2R are much reduced. You cannot easily and efficiently convert DC to high voltages.
What is the minimum voltage necessary to operate a light emitting diode?
That will vary with the type (i.e. "color") of the LED: IR LEDs operate at the lowest voltage (1.2V), red LEDs operate at low voltages (1.8V), green LEDs operate at medium voltages (2.5V), blue LEDs operate at high voltages (3.3V), and UV LEDs operate at the highest voltages (4V). Intermediate color LEDs operate at correspondingly intermediate voltage between those given above. The reason an LED cannot produce light below these voltages is it takes more voltage drop to get the energy to produce higher energy photons and the different types of binary semiconductors needed to produce each color/energy of photon result in different junction forward bias voltages.However LEDs are really current operated devices, not voltage operated devices, so they need a series resistor or a current source to limit the current through them. Simply applying a voltage source with the necessary "minimum operating voltage" across an LED will generally destroy it instead of lighting it.
When batteries come in different volts what does it mean?
It means they come in different voltages to supply power to different things that require different voltages.
What would be the 3 phase voltage on a frequency of 50 Hz?
Single phase and three phase voltages are not related to the frequency at which the voltage is generated. The frequency at which voltages are generated is governed by the speed of rotation of the generating device.
Electric current from a generating plant is?
Electric current from a generating plant is typically alternating current (AC), which flows back and forth in a rapid and regular manner. This AC current is then transmitted through power lines to homes and businesses for use in electrical appliances and devices.
Need for generating high voltages in laboratory?
because in laboratory almost we are using only three phase equipents,so we require more pewer in laboratory, thats why we are generating high voltage in laboratory.
How many volts is in a battery?
Batteries come with different voltages.
What are the different voltages for DC?
Like AC, DC can be at any voltage.
Can you change the plugs on English appliances to US?
you can but don't do it the voltages are different
How do different currents and voltages affect the body?
the body can act as a conductor
Can you have batteries of different voltages?
Yes. The voltage is determined by the chemistry inside the battery.
How do you Calculate the contact rating of relay for AC and DC?
On the side of the relay there is a name plate that tells you the current carrying capacity of the contacts. It gives you the ratings at different AC voltages and a DC rating of the contacts at different voltages.
Why are a range of voltages used?
Several reasons for different voltages. At the heart of it is that to deliver the same power, voltage and current are inversely related. The other aspect is safety. So for the grid, high voltages are used to maximize power transmission within the current limits of the cables. In industrial environments, equipment may require a lot of power - that requires high voltages as well Domestic requirements are not so power-hungry so 120 or 240 volts are adequate, and are also safer (well... less dangerous) than higher voltages.
How far can electricity travel through air at different voltages?
20KV can throw a spark about a centimeter long in dry air. the distance at other voltages is directly proportional to the voltage. you should be able to calculate the distances for other voltages yourself from this info.
