Electrical Engineering

The term 'inductance' was coined by Oliver Heaviside in February 1886.[1] It is customary to use the symbol L for inductance, possibly in honour of the physicist Heinrich Lenz.

A scheme where a signal is sent to to a remote location to cause a trip. An example could be a breaker failure scheme. When the breaker is told to trip, and fails to do so, fiber communications could be used to transmit a trip signal from the local substation to the substation the next bus out to cause that breaker to trip.

GFCI stands for ground fault circuit interruptor. It inherently works by detecting ground current; when ground current is detected above a low threshold, the GFCI will trip. Some GFCIs also may provide phase overcurrent protection (such as the two phase wires being shorted together) as well.

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It is a differential current detector.

The line (or live, phase or hot) and the neutral wires of an a.c. supply should both be carrying the same value of current. (The current comes from the generator and goes to the load through the line and neutral wires and goes back to the generator.)

If there is a difference in the in the two wires, it can only be because there is a fault which has allowed some current to flow to Earth ("ground").

As long as the two currents are equal, the interruptor stays closed. Once an imbalance is detected, the interruptor operates and disconnects the supply.

the electrical resistance of a conductor through unit cross-sectional area per length is called "resistivity of material"

disadvantage of current meter

Victaulic makes a dielectric fitting that could solve your issue.

mains common load voltage (M C L V)

60Hz has a wavelength of 5000 meters.

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calibration period will set depend on the process .in gas industry it is 1 month.

a FET, or Feild Effect Transistor. In a FET, the value of the current depends upon the value of the voltage applied at the gate and drain so it is known as a voltage controlled device. For example: In a MOSFET the current from drain to source depends upon the width of the depletion layer which in turn depends upon the voltage applied on the gate.

The Current-Voltage relationship of a diode is not constant (not a straight line) and hence the resistance cannot be measured. Due to this non-linear nature of the the curve, there exists a unique value of resistance at every point of the curve which is called dynamic resistance (not static of constant resistance).

The dynamic resistance equals the change in voltage divided by the change in current, when the voltage is changed by a small amount. In other words it is the slope of the graph of voltage against current. The dynamic resistance is different at different current values.

About 30 years ago, and I do not remeber the brand or maker, there was a digital multimeter that DID measure dynamic resistance in diodes. It was a God Send for testing diodes in circuit. Diodes only conduct in one direction, so the device would show an open in one direction and a resistance under 1000 ohms on the other or a short (0 ohms).

OverCurrent Recloser, or OverCurrent Relay.

> Predetermination of regulation.

> Predetermination of efficiency.

> Less power loss.

There are several formulas to find out leakage current, but one is the general electric current equation. This electric current equation is I=Qt.

A; Mathematically presented how else can you represent a RATIO

The two leads on a diode are called the anode and the cathode.

Shunt Motor

no transformer is not necessary for rectification today most of power supplies have been made without using transformer in order to reduce weight and size of power supply.for example SMPS(switch mode poqwer supply)

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No. Current does not get lost in a circuit. By Kirchoff's Current Law, the signed sum of currents entering a node is zero, which means that the current at every point in a series circuit is the same.

Power may get lost, by conversion to heat, but do not confuse power, voltage, and current - they are three different things.

find current throrgh RL by using menemims

Current density is unrelated to Ohm's Law.

μS = 10 -6 S

therefore: S= 192800 μS * 10 -6 = 0.1928

Ω= 1/S

therefore: 1/0.1928 = 5.19 Ω