D 12.4 An emitter follower using the circuit of Fig. 12.3,for which the output voltage range is ±5 V, is required usingVcc = 10 V. The circuit is to be designed such that the currentvariation in the emitter-follower transistor is no greater thana factor of 10, for load resistances as low as 100Q. What isthe value of R required? Find the incremental voltage gain ofthe resulting follower at vo = +5, 0, and -5 V, with a 100-Qload. What is the percentage change in gain over this rangeof v0?

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Burgers vector is generally parallel to the dislocation line. a)-true b)-false