An emitter follower with a bjt biased at ic = 2 ma and having β = 100 is connected between a source with rsig = 10 k and a load rl = 0.5 k.
(a) find rin , vb/vsig, and vo/vsig.
(b) if the signal amplitude across the base–emitter junction is to be limited to 10 mv, what is the corresponding amplitude of vsig and vo?
(c) find the open-circuit voltage gain gv o and the output resistance rout . use these values first to verify the value of gv obtained in (a), then to find the value of gv obtained with rl reduced to 250 .

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

Observations show that interstellar clouds can have almost any shape and