The resistance in the circuit is 10 Ω. The operating voltage is fluctuating; the appliance in the circuit operates best at 4kW. What is the operating voltage?
In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is