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 .

c. newton's third law of motion

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the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.