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Holes and electrons
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∙ 10y agoyes
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What is the difference between thyristor fuse and normal fuse?
A: THYRISTOR can be used to clamp damaging energy as opposed to a fuse that must blow open and invariably takes time to blow. A thyristor is much faster and controllable actually if the problem disappear it can be made to open up again and restore power for normal operation.
What is blocking diode?
any diode if connected to where the anode is tie to a negative potential will block that voltage. Up to the limit of the breakdown potential of the diode whereby avalanche current will destroy the diode unless current limited
What is sign wave inverter?
From your question I assume that you mean an AC inverter, a device that converts DC electricity to AC electricity. Invertors come in many forms, however are commonly simply a DC rectifier opperated in inverse with a component such as a thyristor used rather than a diode. This thyristor allows the rectifier to be triggered, creating a square wave output at a frequency of say, 50Hz. As square wave can be made up of a near infinite number of sine waves (see fourier transform) an RLC filter can then be used, tuned to the fundemental to give an AC output.
What is firing angle in thyristors?
A sinusoidal AC waveform is divided up into 360 degrees, with the positive half and the negative half of the waveform combined into a kind of circle. The firing angle simply refers to the point on the waveform, as measured in degrees (thus 'angle') which the thyristor is triggered into conduction. Answer2: Firing angle is the phase angle of the voltage at which the scr turns on. There are two ways of turning an scr on..one is by applying a gate current or by applying a voltage across the scr until it becomes greater than the breakover voltage.... Answer3: Thyristor need gate current and voltage to make it conduct. The firing angle is the sinusoidal increasing voltage. As it rises a voltage is reached with enough power to fire to trigger the gate. That voltage is the angle considering that a sinusoidal is 360 degrees per cycle.
Which property of Electric current is used in electrolysis?
Probably the fact that a typical electric current is made up of moving electrons. Also, the fact that it carries energy.
Why anode is eaten up in electrorefining process?
In electrolytic refining,anode contains the impure aopper and when current passes through solution all the impure copper ions from anode dissolve in solution and thus when all ion discharge anode becomes empty and thus eaten up.
What is conduction angle in thyristor?
not a clue a A: It all depends on the thyristor. There are no calculation involved not until you look up the thyristor specifications and decide on the load of the thyristor then you may calculate or more likely choose.
How thyristor used in induction furnace?
Thyristor is used for Rectifiying and inverting the power supply in induction furnace. The parallel Resonance Coils (Current Control Furnaces) Control the Furance power up to 40% by controlling the firing angle of the rectifier inverter and remaining 60% controlled by inverter thyristor control. In rectifier they are varying the thyristor firing angle from 15 deg to 45 deg. (in sin wave)
How does the turn off circuit on a Class B type thyristor work?
The Class B type of commutation circuit uses an LC circuit in parallel with the thyristor. During initial power up, the capacitor C charges to the supply voltage (Edc) and the thyristor is OFF. The initial charging current of the LC branch flows thru the load. When the thyristor is fired, the supply DC voltage is applied across the load, and the voltage across the LC branch goes to almost zero (the forward drop of the thyristor). Then the LC circuit enters a resonant discharge with an angular frequency of the square root of the inverse of LC product. The LC resonant cycle supplies a peak forward current thru the thyristor of Edc times the square root of C/L. This peak current must exceed the load current in order to effect the turn-off of the thyristor during the second half of the discharge resonant cycle. This peak current is usually designed to be twice the load current. The thyristor is reversed biased (and turned OFF) during the first quarter cycle of this second half of the resonant cycle - thus allowing the supply to recharge the capacitor in the LC parallel branch. Then the cycle can repeat.
What is the difference between thyristor fuse and normal fuse?
A: THYRISTOR can be used to clamp damaging energy as opposed to a fuse that must blow open and invariably takes time to blow. A thyristor is much faster and controllable actually if the problem disappear it can be made to open up again and restore power for normal operation.
Tha water solution of ionic compound are able to conduct an electrical current?
The water solution of an ionic compound is able to conduct an electrical current because of ions migration towards the anode and cathode. Anions give up and electron at the anode and captions take an electrode at the cathode and current keeps moving.
What are two terminals in a battery?
In a car battery, the terminals are the heavy lead posts sticking up from the top of the battery, one labeled positive and one negative. Car batteries are of the lead-acid design, in which the anode (positive side) and cathode (negative side) are made of lead and lead dioxide, and as current leaves the battery through the anode both electrodes (anode and cathode) are chemically converted to lead sulphate. Cars use an alternator to send some of the current from the battery back to the anode, which partially converts the lead sulphate back into lead and lead dioxide, thus greatly lengthening the life of the battery.
Why does a potato acquire a greenish deposit at the anode during electrolysis of potato?
You do not mention what you are using as the anode and cathode, but i would assume that given the green colour you are using copper or brass perhaps as the anode, and it is breaking down into a copper carbonate(which is green). By applying electrical current to the circuit you are speeding up the conversion of copper to copper carbonate(or similar).
What happens to voltage as you move the anode and cathode closer in a fruit battery?
the voltage will go down when the anode and cathode are closer together but will go up when they are further apart
What are made up of free electrons and ions?
To flow the current
An electric current is made up of?
An electric current is made up electrons that are moving into a place that is usually positively charged. It moves towards an area that is positive to be able to neutralize that charge.
How do you make a LED light?
A: Most LED needs a minimum voltage and minimum current in the right direction positive anode negative cathode to light up. Unfortunately the voltage can be as low as 1.2 to 5v and the same apply to the current from 5ma to 500ma. So there is no set values it depends on the device.
