Electrical Engineering

In point of fact, vacuum tubes do obey Ohm's law. Everything electrical obeys Ohm's law. The reason vacuum tubes don't appear to obey the law is that not every consideration takes into account the fact that vacuum tubs have dynamicresistance. Ohm's law, as applied to "pure" ohmic resistors, requires constant resistance, which no material, no matter how good, exhibits. In the real world, you have to consider that resistance can vary along with voltage and current, and this "complicates" things.

600 + apmeres

The direction of the force that drives the machine is determined by the relative directions of the field and the armature current. By reversing the direction of both field and the armature current, the direction of the resulting force stays the same; you have to reverse the direction of one or the other; not both! Prove it for yourself, by applying Fleming's Left-Hand Rule (for conventional current flow); reverse the direction of both your first finger (field) and your second finger (armature current), and you thumb (direction of motion) will end up pointing in the same direction!

its having cross magnetic field,,,

Current Carrying Capacity of ACSR DOG Conductor 300 Amp

Er. Anil Prajapati

Because that is what you are trying to measure.

Copper loss varies with the load.

forward bias 0 volts, reverse bias infinity volts.

The output power of an amplifier is greater than its input power, whereas the output power of a transformer is almost the same as its input power. In other words, an amplifier increases acts to increase power, whereas a transformer only increases voltage.

it will be the one that is dark

There is a limit to the physical size of an alternator, as the output voltage is determined by the number of turns of the windings that can be installed in its stator. This limits the output voltage to around 25-30 kV which is far too low for transmission purposes (in the UK, 400 kV). Fortunately, this doesn't really matter, thanks to transformers.

An electric current (symbol: I) is a very slow drift of charge carriers (electrons, in metallic conductors), and is measured in amperes (symbol: A). An ampere is defined in terms of the 'magnetic effect' of an electric current, that is the force of attraction or repulsion between two, parallel, conductors due to the interaction of their magnetic fields. An instrument used to measure electric current is called an 'ammeter'.

The principle of the DFIG is that rotor windings are connected to the grid via slip rings and back-to-back voltage source converter that controls both the rotor and the grid currents. Thus rotor frequency can freely differ from the grid frequency (50 or 60 Hz). By using the converter to control the rotor currents, it is possible to adjust the active and reactive power fed to the grid from the stator independently of the generator's turning speed.

To do a motor solo run test you need to connect the motor to a power supply. Next, you observe the motor's vibration, temperature, and sounds.

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All residential loads are connected in parallel, so that they share the same supply voltage, which is necessary for them to develop their rated power outputs.

Because the total current is divided between the two components. For example, if the current was one amp, and you connected two bulbs in series, ech bulb would get half an amp of current. As brightness is proportional to current, this means they glow more dimly.

The superposition theorem (not 'super position'!) is used to solve complex circuit -typically a load with two voltage sources. It enables the currents through, and the voltage drops across, the various components to be calculated and, therefore, the power of each component can be determined.

The series winding takes the full load current of the generator. So it require only a few turns to produce the required magnetic field and so the resistance is lower.

You are, presumably, referring to alternating current, in which case the 'maximum' current is the peak or amplitude of the waveform. The 'average' value of current is zero, because the average value of the first half of each cycle is negated by the average value over the second half of each cycle. This is why a.c. currents and voltages are always expressed in 'root-mean-square' (r.m.s.) values which is the value of an a.c. current that does the same amount of work as a given value of d.c. current. The r.m.s. value for a sinusoidal current (and voltage, as voltage and current are proportional) is 0.707 times the peak or maximum value.

heavy load

They both have the same current.

With enough batteries to get sufficient voltage - sure. Put your tounge to the terminals of a 9 V battery and you'll see.