[" A load resistor of "2k Omega" is connected in the collector "],[" branch of an amplifier circuit using a transistor in "],[" common-emitter mode.The current gain "beta=50" .The "],[" input resistance of the transistor is "0.50k Omega" .If the input "],[" current is changed by "50 mu A" ,(a) by what amount does "],[" the output voltage change,(b) by what amount does the "],[" igput voltage change and (c) what is the power gain? "]