Circuit Assignment Question

1. A power supply produces 24 volts at full load with a percent regulation of 10%, calculate the no-load voltage of the supply.

2. A common-emitter transistor amplifier has a base current change of 15 microamperes and a collector current change of 200 microamperes. The load resistance is 50000 ohms with an input resistance of 1000 ohms.

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Calculate the AC alpha, AC beta, AC voltage gain and power gain of the above circuit.

3. A series-tuned resonant circuit operates at a resonant frequency of 1 MHz. It contains a .01 'LF capacitor and a 300 'LH inductor with 20 ohms of resistance. Calculate the circuit's quality factor and bandwidth at its resonant frequency.

4. You must design a series-tuned LC circuit with a resonant frequency of 2 kHz. The circuit Wiil include a 2 mH inductor. What size capacitor should you install?

5. In the circuit below the LED's rated current is 20 millamperes. With a voltage drop across the LED of 1.5 volts, calculate the value of the series resistance RI necessary to be used if the supply voltage is 12 volts DC.

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6. In the zener diode regulator circuit below calculate the value of the current through the zener Diode if the power supply is rated at 24 volts @ 500 milliamperes. The load voltage is 12 volts and draws a current of 300 milliamperes. Aso calculate the value of the series resistance R.

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