Electrical Engineering

tan (phi)= (V* sin (theta) + Ia*Xs)/(V*cos (theta) +Ia*ra)

theta is power factor angle

torque angle= phi-theta

The effects on what, exactly. I can tell you the effect on an incandescent light bulb. If an incandescent light bulb is supplied with a lower voltage than its design voltage, then the light will not be as bright or as white as the designer intended. But maybe you weren't asking about a light bulb. What were you asking about?

For instance: A microphone rated at 150 ohms to 300 ohms is considered low impedance. About 600 to 2 000 ohms is medium impedance, and 10 000 ohms or more is high impedance.

A watt is one joule per second - a joule is the SI unit of energy.

The commutator is a rotating switch, which reverse the polarity of the generated voltage every half-cycle. So it acts to rectify the output voltage.

the expression for calculating maximum current through the zener diode is :

Izmax=Pzmax / Vz

They can. Low end inverters often use a square wave output, instead of a sine wave output. This causes harmonic distortion that can sometimes damage equipment. One of the damage mechanisms is the simple rectifier - when the diode conducts and recharges the filter capacitor in a power supply, if the slope of the step change is vertical, as it would be with a square wave, the instantaneous current through the diode and capacitor tries to be infinite, and that can damage the diode or capacitor.

The thermocouple is an sesnsing device , when the temperature increases it increases the voltage , that voltage is used for tripping purpose

Theoretically there is no limit to the voltage of an electrical current.

Before connecting to the transistor we use a capacitor because

for the transistor to amplify we should first apply DC biasing so that we can set an operating point to it
so once the transistor is biased DC currents flow in the whole circuitry

All the AC signal source are shorts to the DC currents so we employ capacitor for two reasons

1.As capacitor blocks DC and allows AC it is connected for not moving the DC operating point of the transistor and making it fixed since if any small DC part arises in the signal it leads to the change of operating point and our amplification procees gets affected

2.To block the already present DC currents in the circuitry for not getting away and making it fixed

Because something is wrong.

Check for shorts and, if it is a GFCI, also check for ground faults and leakages. It is also possible, in the case of a GFCI, that an inappropriate load, such as a computer monitor or UPS, is connected. These devices pull transient power to ground and will trip a GFCI.

Do not ignore the situation. The protective device is tripping for a reason.

The purpose of a Pager Motor is to vibrate the pager / cell phone as a signal to its user, either instead of or in addition to making some kind of tone / music / ring.

The vibrating is caused by a tiny rotary electrical motor, with an off-center weight attached to the drive shaft.

When it spins, like a washing machine with an off-center load, it shakes the cell phone or pager.

The peak output value in a double ended differential amplifier is double the peak output value of a single ended differential amplifier for the same input signal because there are two outputs, one being the normal output, and the other being the inverted output. Whatever the normal output does, the inverted output does, but with a reverse sign. As a result, if one output has a value of X, then then other output has a value of -X. If you compare the two outputs, then, the difference between them will be 2X, or double the value.

Geographically, motor and generator production occurred throughout much of the nation, according to the 1997 Economic Census, but was particularly concentrated in Wisconsin, Tennessee, Arkansas, and New York.

Electric circuits are everywhere. In your car, home, office, your digital watch, your cell phone and on and on. The electric circuit that makes up your cell phone provides the local user interface and connects to a cell tower to allow you to make and receive calls.

Current flow would be the same through the resistor, since it's in series, but the voltage would be slightly reduced based on the resistance.

If you have 2 resistors in parallel, the current will divide through each resistor, and the voltage stays the same.

PLL

Ohm's law and water flow - PLL

LRA (locked rotor amperage) is not considered. Starting current for a motor is usually in the neighbourhood of 300% of the FLA (full load amps). The FLA is taken from the motor's nameplate.

They weigh a heck of a lot. Without a foundation, they would sink into the ground and end up being useless.

if we remove a resistor from the parallel connection the effective resistance value will be increased.

Yes,provided that the power output of the investor is higher than the motor's rated power.

In U. S. household wiring the two primary phases of 110 to 120 volts rms are 180° out of phase with each other which is why the voltage measured from line 1 to line 2 is double that of each line measured to the common return. The outputs of two identical transformers would therefore be additive if connected in series and in phase and subtractive if out of phase. Please note that if the phase relationship of the inputs is unknown, such as that coming from two independent portable generators, for example, the summed output voltage will be unpredictable.

to manage operations

It is one junction i.e. P-N junction diode.

Analog and digital signals can both be transmitted wirelessly.

Wireless internet (Wi-Fi), for instance, uses digital. AM and FM Radio uses analog. Cell phones are digital. Cordless phones can be digital or analog.