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Q. For the mechanical spring-mass-friction system shown in Figure, the differential equation relating the force F(t) and the velocity u(t) is given by
where M is themass,Dis the friction, and Cm is the compliance (reciprocal of stiffness) of the spring. For M = 20 kg, D = 4 kg/s, and Cm = 8 N/m,
develop an electric equivalent network (a) using the force-current analog, and (b) using the force- voltage analog, and find u(t) for F(t) = 40e-t/4 N.
Number of holes in valence band: Derive the expression for number of holes in valence band and Fermi level in an intrinsic semiconductor. (b) By that percentage does the
Define Causal System - Discrete Time Systems? A causal system is one which produces an output only when there is an input. All physical systems are causal. In general, a causal
Advantages of BJT over MOSFET: BJTs have some benefits over MOSFETs for at least two digital applications. Very first, in high speed switching, they do not comprises the "large
Q. Sketch the depletion MOSFET drain characteristics The depletion-type MOSFET has a structure similar to that of the enhancement-type MOSFET with one important difference: The
What is meant by doping? How does it affect a semiconductor? Doping: The process through which an impurity is added to semiconductor is termed as doping. A semiconductor to th
Write down basic postulates of sommerfield’s free electron gas model. Show that the number of energy states per unit energy is given by g(E) = 4Rv/h 3 (2m) 3/2 E 1/2 . What is
A 3 phase, 6 pole induction motor is rated at 400hz, 150v, 10h.p., 3% slip at rated power output. The windage and friction loss is 200w at rated speed. With the motor operating at
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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
Q. A practical voltage source is represented by an ideal voltage source of 30 V along with a series internal source resistance of 1.2 . Compute the smallest load resistance that c
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