Electrical Engineering

If the motor's shaft will not turn (is locked) because maybe its bearings have seized - up or the thing it is driving has got damaged so it won't allow the shaft to turn, the motor will overheat in short-order.

First do some form of research on agriculture. Then include in the report the topics that agriculture are based upon which are, cultivation of animals and plants, farming, and all life forms of food.

From the Generator station, the voltage is sent to a step up transformer. Transmission at higher voltages is used to over come line loss over the miles of transmission.

14 ohm X 20 A = 240 V (V=IR)

the answer is 280 14x20 is 280!

In delta to delta there will be no ground on both primary and secondary sides. Leave the primary side but we take care on secondary side. If there any fault occurs on the secondary then there will be unbalanced voltages between the phases results in the flow of current through the secondary windings so only we are using star on the secondary side while having neutral to prevent such a current flow.

As far as CA is considered for Freshers without exp. average salay will be around Rs. 6 Lakhs per annum. In case of Software Engineer, it is around Rs. 2.5 Lakhs per annum.

Yes, because a thinner wire has higher resistance and dissipates more energy as heat.

you don't run a new 120 line

hi

hope this will help

http://www.picotech.com/auto/articles/electronic-fuel-injection.html

Regards

waseem (S!M)

Replace with single speed of the same electrical, speed, and mechanical considerations for mounting, choosing the preferred speed from the existing two speed.

In general it is common practice especially in the HVAC industry to replace a three speed motor with a four speed motor, using only three of the speeds that match the existing.

Replacement must be with a single speed of the same horsepower, torque, and other electrical considerations of the needed or preferred two speed choice of speeds. Often the choice of speed, changes the horsepower or torque.

yes

A Switch on a domestic supply has always got to be on the LIVE part of that circuit. A double pole switch switches both the LIVE and NEUTRAL off together.

electrical device

pmmc stands for permanent magnet moving coil instruments these instruments are secondary measuring instruments in these instruments a permanent magnet is installed and a moving coil in this way when current is passed through the fixed coil then a force will be developed on the moving coil and thus it moves and with this moving pointer moves on the scale and gives the corresponding reading . if someone wants to read it thoroughly then he can try ashfaq hussain , j.b.gupta of basic elelctrical engg. for b.tech first year .

you need cable tray rated wire to use in a cable try

a cable tray is basically open to air so the current rating of the wire doesnt need to be reduced if you have more than 4 conductors

cable tray rated tubing is fine( temperature flammability) steel or copper is fine.

No. It is true they are not the same, which is completely different than saying they share nothing in common. An apple and an orange are not the same, but they are similar in that they are both fruit, grow on trees, need sunlight to grow, are generally considered good breakfast juices, etc.

A: A stepper motor move a step at the time. If you know the steps then you will know the speed per tum. The motor need current pulses with a fast rise time the width is immaterial once moved

Parallel circuit: The fact that the voltage is the same follows from Kirchoff's Voltage Law.

Series circuit: The voltages of the individual resistances must add up to the total voltage. This, too, follows from Kirchoff's Voltage Law. If the resistances have the same values, all of them will drop the same voltage (which, of course, will be less than the total resistance). But if they are different, Kirchoff's current law tells us that the same current must flow through each resistor in series - and the voltages will be different in this case, according to Ohm's law.

each phase looks like an ocean star and if you have woken up with it you can see it shines brightly

If the slab is zero thickness, nothing. The lines of electric field not intercepted by the slab are unaffected, so what goes on there is unaffected. The part where the lines are intercepted is converted to two capacitors in series, and the charges on opposite sides of the slab are equal and opposite, equal to the charge on the parts original outer plates facing it. From the outside view of the world, nothing changes on the outer plates, so the capacitance is the same. If the plate is not zero thickeness, then the capacitors on that side become higher and so the total capacitance will increase, with significant distortions of field lines.

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For a parallel-plate capacitor with small spacing, so that fringing can be neglected, with a flat slab of dielectric, the new capacitance is easily calculated by noting that the electric flux D is continuous, and in the volume occupied by the dielectric the E-field is reduced by a factor equal to the relative permittivity. Thus the voltage is reduced for a given amount of charge and the capacitance increased.

If the plate area is A and the spacing is s and the dielectric thickness d, then with a charge Q on the plates the electric flux is just D = Q/A. The electric field on a line between the plates is D/eps0 in the air and D/(eps0 x epsr) inside the dielectric. Therefore the voltage is D/eps0 x (s-d) from the two air paths plus D/(eps0 x epsr) x d from the dielectric path.

So the capacitance in this case is given by:

C = A x eps0 / [s - d(1 - 1/epsr)]

So if d=0 or epsr=1, as they are when there is no dielectric, the capacitance reverts to the standard formula for parallel plates:

C = A x eps0 / s

An electrosurgical generator is a piece of medical equipment. The generator takes mains AC current and turns it into radio frequency (>100Khz) AC current. This current can then be used to cause a tissue effect in a patient (i.e. cutting, coagulation, fulguration).

Settling Time and the Real roots of a system are related reciprocally.

Most outdoor power and distribution transformers are oil filled. There are two reasons for this: (1) to cool the transformer and, (2) insulate the windings and other components, allowing the overall physical size of the transformer to be reduced and, therefore, provide a smaller 'footprint'.