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What is the capacitance of these deflecting plates and hence of the oscilloscope?
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What is the use of capacitor in touch operated system?
Capacitors are used on touch screen technology. mystery of using capacitor in touch screen is the working principle of capacitor . when you touch the screen the distance between two plates inside screen will change(by pressing) and this will cause the change in capacitance and hence in voltage and this signal fed to processor to process it. and that behind the use of capacitor in touch screen.
Why dc can be stored ac cannot stored?
Why direct current (DC) can be stored but alternating current(AC) can not be? Current means flow of charge per unit second. Any flow cannot be made stationary. Then it is not flow. Hence both direct current and alternating current cannot be stored. We can store only charges. In capacitors we store charges and not current. For storing we use direct supply or direct voltage When a capacitor is connected to a battery, which is a source of direct voltage, each plate of the condenser get charged. Charges remain in the plates. No current flows in between the plates. When the source is removed, there are some charges left in the plates. We say that charges are stored in the plates. If an alternating source of supply is connected in between the plates,every instant ,the charges in the plates are alternating and they are not stationary. When ac supply is removed, all the charges move out of the plates and hence no charge is left in them. Hence charges can be stored with dc supply and not with ac supply. However as long as the ac is connected to the capacitor, the capacitor gets stored and emptied with the frequency of the ac supply.
What affects the value of peak current?
From ohms law, I = V/R hence Voltage and Resistance can affect the value of current, both peak and average. Also with a rectifier circuit other factors can affect the peak current such as frequency and capacitance Craig - AUT
How much resistance will an ohmmeter indicate across a good capacitor?
because resistance is restricting the current and voltage, so for it be accurate you need to know what the voltage and the amps are.AnswerCapacitance is quite independent of resistance and, therefore, it will NOT vary if resistance is changed.
Why voltage gain decreases at high frequency in case of a transformer coupled amplifier?
Depends on the elements used in the circuit.1.At Low frequency: The coupling capacitors are used to isolate the AC input and output from DC bias conditions for active devices. These capacitors with the input and output impedance of the active device act as a high pass RC filter, hence the gain falls.2. At High Frequency: The frequency is high, but not as high as the microwave frequencies. There are two reasonsa>The capacitance of connecting wires are connected in parallel the i/p and o/p. When a capacitor is connected in parallel it acts as low pass filter, hence the voltage gain falls. This is when the frequency is high but not high as microwave frequencies.b> The parasitic capacitance's of the active device are connected in parallel with the i/p and o/p terminals. They along with the device impedances act as low pass filter.
Does charge on a parallel plate capacitor depend on distance between the plates?
Capacitance is the ability of a body to store an electricalcharge. Any object that can be electrically charged exhibits capacitance. A common form of energy storage device is a parallel-platecapacitor. In a parallel plate capacitor, capacitance is directly proportional to the surface area of the conductor plates and inversely proportional to the separation distance between the plates. If the charges on the plates are +q and −q, andV gives the voltage between the plates, then the capacitance C is given by
Why capacitance decrease with an increase in distance between plates?
This is because a capacitor works on the principal of electro-statics. The closer the plates are to each other, the greater the effect of the positive and negative ions attraction across the dielectric constant. The further the plates are from each other, the lesser the attraction hence lower capacitance. Larger plate area increases capacitance also. If you have ever taken apart an electrolytic capacitor, what you'll find is two thin strips of aluminum foil with a strip of paper between them that was soaked in the electrolytic acid. When you unroll the assembly (wearing gloves), you'll find that the plates are quite long. This makes up the surface area of the two plates, which is one of the factors that determines the capacitance.
What is the capacitance of parallel plate capacitor?
We know the Electric Field, E, is equal to: E=V/l, where V is voltage, l is distance. V=E*l Capacitance, C=q/V, and C=q/(E*l) Hence capacitance is inversely proportional to the distance separating the plates.
What is the main drawback of thyristor?
thyristor is four layer three junction device,hence there is effect of the junction capacitance on the operation.thyristor also requires special techniques to make it on and off.along with this the delays produced due to junction capacitance has to be considered.
What is the effect of stray capacitance in a circuit?
stray capacitance(one that develops between wires ,conductors within the circuit) is obviously not useful as it alters the effective values of circuit components when developed in the oscillators and hence it destabilize the frequency of oscillations Engr.syed mudassir hussain
What is diffusion capacitance in pn junction?
A capacitor is a device that stores charge. Therefore any device that stores charges( static or dynamic) can be said to have capacitance. When a PN diode is forward biased, a current flows due to the majority charge carriers. At a particular instant there will be charges in motion. This is dynamic charge. The capacitance due to storage of dynamic charge is called the diffusion capacitance. We know that C = Q * V. That is capacitance is directly proportional to charge stored. Since the diode current increases exponentially with the voltage applied across it, the dynamic charge also increases exponentially . Hence the diffusion capacitance increases exponentially with the increasing diode voltage.
What is the use of capacitor in touch operated system?
Capacitors are used on touch screen technology. mystery of using capacitor in touch screen is the working principle of capacitor . when you touch the screen the distance between two plates inside screen will change(by pressing) and this will cause the change in capacitance and hence in voltage and this signal fed to processor to process it. and that behind the use of capacitor in touch screen.
What is the meaning of 'flatline' in terms of your heart?
This happens when a patient's heart stops beating and the oscilloscope measuring their heartbeat shows nothing but a static line - hence "flatlined."
What group of whales eats krill?
Baleen whales eat krill (by filtering it through their baleen plates; hence the name).
What is the relationship between capacitance and frequency?
This is a very broad generalization, but in general, increasing the value of one or more capacitors in an electronic circuit will decrease the resonant frequency of one or more sections of the circuit.
What is function of grid in the battery?
The more "plates" in the grid, the more surface area exposed to the electrolyte, hence the more power produced.
Where are earthquakes common where plates meet?
conservative plate margins
