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Properties of a good heat sink
For maximum efficiency, a heat sink should be
1)Be in good thermal contact with the transistor case
2)Have the largest surface area
3)Be painted black
4)Be mounted in a position such that free air can flow past it.
what is beta?
Power Control A chopper converts fixed de input voltage to a controllable dc output voltage. It is the single stage dc to dc conversion device. It is a high speed on/ of
Q. For the electromagnet shown in Figure, the λ-i relationship for the normalworking range is given by i = aλ 2 + bλ(x -d) 2 ,where a and b are constants. Determine the force app
Increase in HT and LT Ratio It is well known that for high HT/LT ratio, the losses will be low. The losses for a given quantum of power supplied through a line are inversely p
Which clipper would you prefer between the series and the shunt clipper? Why?
Q. Explain the action of a pn-junction with bias. Consider both the forward bias and the reverse bias, and use sketches wherever possible.
The circuit below will be most efficiently analyzed by obtaining the Thevenin equivalent circuit for the circuit to the left of the points (a-b) on the schematic. The capacitor is
Q. Discuss the nature of sinusoidal signal? Discuss the nature of evenness and oddness of: (a) The sinusoidal signal x(t) = A cos(2πf 0 t + θ). (b) The complex exponentia
Compute the induced emf: If a coil of 150 turns is linked with a flux of 0.01 wb while carrying a current of 10 Amp, compute the inductance of coil. Now, if current is reverse
Switching Characteristics The switching characteristic of an IGBT during turn on and turn off time all shown in the sum of delay time and rise time gives the total tur
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