Electrical Engineering Answers

Show that the voltage gain of Emitter Follower is less than unity.

A colleague asks you to help characterize the functional properties of a new biostimulator, which releases bioactive molecules in proportion to the amount of light incident on the device. Upon release the molecule transitions from state A to B at a rate r1 = 10%/sec and from B to C at a rate r2 = 5%/sec. In state C, the molecule can activate receptors in target cells. The molecule also reverts spontaneously back from state C to A at a rate r3 = 1%/sec. Letting A, B, and C denote the amount of molecule in its various transitional states within the extracellular millieu, specify the impulse response function of the biostimulator (assume an LTI system that is in steady state to start).

Drive a formula of instantaneous power for single-phase AC power system in the following different loads. i. Pure resistive load ii. Pure inductive load iii. Pure capacitive load iv. RLC load

 Consider a coaxial cable formed by two concentric cylindrical conductors with the radius of the inner conductor being “a” and the outer conductor being “b”. Let L be the length of the cable. Assume the surface charge distribution on the inner conductor be defined by ρs. Determine the flux density D at a point ρ located radially between a and b, i.e. a < ρ < b. 

The transfer function ω(s) and incremental change in beam length Δ L(s) is given as ω(s) /ΔL(s) =5(s+2)/(s+5)(s+1)^2. The change in the beam length is ΔL(s)=1/2.Determine the velocity response ω(t)