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Q. What is thermal runaway.
The problem of self heating arises due to dissipation of power at the collector junction. The leakage current ICBO is extremely temperature dependent and increase with the rise of temperature of collector base junction. An increase in ICBO causes an increase in collector current IC considerabely. With the increase in collector current ,collector power dissipation increase which raises the junction temperature which leads to further increase in collector current. The process is cumulative and may lead to the eventual destruction of the transistor . This phenomenon is called thermal runaway.
Modify the design of the circuit shown in FIGURE and draw a circuit diagram to provide rotary actuation in both directions using a single direction pump (to replace the bi-directio
Explain Dielectric constant. Dielectric constant: This is also termed as 'Permittivity'. All insulating material possesses an electrical capacitance. Such capacitance of unit d
detail note on non biased
Amplifier Usually, an amplifier or simply amp, is any device which changes, generally increases, the amplitude of a signal. The connection of the input to the output of an amp
A circular ring of magnetic material has a mean length of 1m and a cross sectional area of .001m^2.A sawcut of 5mm width is made in the ring . calculate the magnetizing current req
Q. A 150-kVA, 2400/240-V, 60-Hz, single-phase transformer has the following parameters: R 1 = 0.2 , R 2 = 0.002 , X 1 = 0.45 , X 2 = 0.0045 , RC = 10 k, and Xm = 1.55 k,
Q. (a) Show by applying Ampere's circuital law that themagnetic field associated with a long straight, current-carrying wire is given by B φ = µ 0 I/(2πr), where the subscript φ d
Theft or Pilferage of Power by the Existing Customers Power theft through the existing consumers is the predominant cause of loss of revenue to the electrical utilities. Almos
NIS Sound Systems, Inc. produces and sells sound systems for both home and auto. DVD players used in the assembly of NIS systems are purchased from BUN Electronics. NIS purchasing
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