A power amplifier has an output impedance of 8 ohm and an open-circuit RMS voltage of 64V
a). Determine the power this amplifier will deliver to a 4 ohm load, to an 8 ohm load, and to a 1K-ohm load
b). What would be the open-circuitvoltage of the amplifier if the signal level were increased so that the power delivered to the 1K ohm load would be the same as that which was delivered to the8? load in Part a) of this problem