Electrical Engineering

Ohm's Law says that Voltage = Current x Resistance (Load).

Therefore Current = Voltage / Resistance and as resistance decreases current increases and as resistance increases current decreases.

No

On a digital multi-meter the black lead connects to the common (COM) port in the meter.

The sand flea jumping robot uses a single CO2 powered piston to propel itself into the air. Really, the only engineering feat the device has is that it can repeatedly fall from those heights without breaking. The wheels are the real interesting part on it.

It shows the Purification during the filtration of crude oil.

Isolation switches can be closed with loads connected. The isolation switch should not be opened under load unless the switch is load rated. This information can be found on the isolation switch's cover as to the amount of current that can be safely interrupted.

Theoretically that can be done with transformers, but the power available would still be limited by the circuit breaker on the original 120 v supply.

It isn't. However, the ratio of magnetomotive force to magnetic flux will tell you what the reluctance happens to be for that particular ratio, in exactly the same way that resistance isn't dependent on current, but the ratio of voltage to current will tell us what the resistance happens to be for that particular ratio.

phase fault relay are having higher settings because the magnitude of phase fault currents are not so much higher as earth fault currents.hence in order to prevent any damage to the system,the earth faults should vanish as quickly as possible

The higher the voltage, the less amperage is required and is easier to supply power to the device. Motors take much more power than lighting, therefore voltages may be higher for easier transmission.

swinburnes test is a type of SWINBURNE'S TEST:-

Ø It is a simple method in which losses are measured separately and from their

knowledge, efficiency at any load can be pre-determined in advance. The only

running test needed is a no load test.

Ø Swinburne􀂶s test is applicable to those machines in which flux is practically

constant i.e. Shunt wound and Compound wound machines.

Ø The machine is running as a motor on no-load at its rated voltage and its speed be

adjusted to its rated value using Shunt regulator.

Ø The no-load armature current Iao is measured using an ammeter, where as shunt

field current Ish is given by another ammeter. The no-load input current is given

by Io = Iao + Ish

Ø Let the supply voltage be V volts

N o -l oa d i nput = V Io watts

P o w er input to armature = V Iao watts

P o w er input to shunt = V Ish watts

No-load input supplies Copper losses (Armature & Field), Iron losses (Hysteresis

& Eddy current) & Mechanical losses ( Friction losses & Windage).

Constant losses = No load input power 􀂱 Armature copper losses

Wc = V Io - Iao² Ra watts .

Ø Predetermination of efficiency of a motor at any load

Input = V I w at ts.

Armature Cu losses = Ia

2 Ra

C o n st a nt losses = Wc

T o tal losses = W c + ( I - Ish)² Ra

Rodney Wilson invented the first electric sponge cleaner in 2008. It is distributed by under the name Squeez- EZ and costs about 342 dollars.

Disk on Chip is a non-volatile memory which has overcome the disadvantage of nand flash memory The difference is that NAND FLASH Access Method : Sequential Ease of use : Complex Easy Here memory management is highly complex not reliable DOC Access Method : Random For Code Sequential for data Ease of use : With help of TrueFFS Its pretty good and Highly reliable For more info go to M-systems Site:

A fuse is used in a circuit to protect the other elements in a circuit. Fuses are rated at different currents and voltages. When the rated current is exceeded the fuse will blow. For that reason fuses are placed in circuits to protect other more expensive items. For example you find fuses in your home. If there was a sudden surge in current coming into your house the fuse will blow and power will be cut to the circuit it is attached to. If that fuse wasn't there the other elements in that circuit would be exposed to the current surge. This would cause damage to that object and if it is something like a computer or tv etc they are not that cheap to replace. So ultimately a fuse is put in place to make sure that other equipment isn't damaged by current surges etc
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By the term synchronized, it means you use different e-learning courses or platforms at the same time to have a shorter period of time taking it only if you can do it such way.

The voltage gain of an amplifier is 200. The decibel voltage gain is? Answer Gain in dB = 20 * log 200 = 46 dB

Placing liquid crystals between two surfaces that are smooth grooves. Smooth grooves on the surface make an angle of 90o a (perpendicular) with smooth grooves on another surface. If the molecules are arranged on one surface from north to south and one molecule on the other surface leads from west to east, there are molecules of which will be forced to rotate 90o. As a result, the path of light that followed the structure of this molecule also rotates 90 ° when passing through the liquid crystal. When electricity stress supplied to the liquid crystal, molecules will arrange themselves vertically lets light to pass through without turning 90o.

b. Rely on the polarization properties (is a collection of very fine parallel lines). Through this polarizing filter, the light from background sources is filtered and then rotated by the liquid crystals and is filtered again before exiting.

A circuit carrying current in one direction is called a direct current (DC) circuit. In a DC circuit, the flow of electric charge is constant and does not change direction. This is in contrast to an alternating current (AC) circuit, where the flow of electric charge changes direction periodically. DC circuits are commonly used in electronics and power transmission systems.

P=I^2*R. No. 8,000 watts.

For maintaining Power factor 1

Split Phase Induction Motor.

An electromagnetic field.

MSAN is Multi-Service Access Node

Current snaps back to zero very rapidly

It just plain wouldn't make it. The voltage drop across the lines would be far too great. Instead, they send it down the lines at between 100kV and 800kV, stepping it down at various points along the way.