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Capacitor have thin conducting plates (usually made of metal) separated by a layer of dielectric, then stacked or rolled to form a compact device. Many types of capacitors are available commercially, with capacitors ranging from the Pico farad range to more than a farad, and voltage ratings up to many kilowatts. In common, the higher the capacitance and voltage rating, the bigger the physical size of the capacitor and the higher the cost. Tolerances in capacitances value for discrete capacitors are usually specified as a percentage of the nominal value. Tolerances ranging from 50% (electrolytic types) to less than 1% are commonly available. Another figure of advantage for capacitors is stability with respect to time and temperature, at times called drift. Variable capacitors are generally less stable then fixed types.
a n-p-n transistor having a.c. current gain of 50 is to be used to make an amplifier of power gain 300. what will be the voltage gain of amplifer
Photoelectric electricity is produced directly from solar energy when which following are absorbed in a semiconductor to create an electric current? a) Protons b) Electron
The Centralia power plant emits SO 2 at the rate of 150 g/s. It has an effective stack height of 50 m. Surface winds at 10 m are steady at 2.5 m/s and it is a fall afternoon. a
Q. In an ideal transformer, the transformer ratio is 1:20.The input voltage and the input power are 6 V and 600 mW respectively. Compute the primary and the secondary currents.
the difference and examples of kinematic in one dimension from two dimension?
The differential equation of motion of freely oscillating body is given by 2 d 2 x/dt 2 + 8π 2 x = 0. Evaluate the natural frequency of the body?
What are benefits of fiber-optic sensors for harsh environments? Benefits of fiber-optic sensors for harsh environments are illustrates below: a. Small, contact measurements
Regard as a volume of space in which the electric potential is 125,000 volts (at every point in the volume of space) and what is the electric field in that region of space? Ans
Faraday's law The line integral of the electric field about a closed curve is proportional to the instant time rate of change of the magnetic flux by a surface limited by tha
What is ground wave?
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