Q2) Class A chopper supplies power to a load having 6 ohms resistance and 20 mH inductance. The source voltage is 100V d.c. and the output load voltage is 60V. If the ON time is 1.5 ms, find: (a) Chopper switching frequency. (b) Imax and Imin (12 and I₁). (c) The average diode current. (d) The average input current. (e) Peak-to-peak ripple current.

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(c) A voltage regulator circuit in a stabilizer device has an input AC voltage of 110V and a Zener diode, which is rated 60V. The circuit has a series limiting resistor of 2 kQ and a load resistor 6 k2. Sketch the circuit and find the following: (i) open circuit voltage and indicate whether the diode is conducting. (ii) load current and output voltage across the load. (iii) voltage drop across the limiting resistor. (iv) current through the Zener diode.

In the following circuit, Vin is a sinusoid AC input voltage which has a 5. peak voltage of 15v. Zener diode D has a Zener voltage of 10V. Sketch the waveform of Vout. Hint: Consider when Zener diode is forward and reverse biased. R 1ka Vin Vout

Show the downward shift of the output signal with the series capacitor and diode. Clampers or DC restorers are clamp a peak of a waveform to a specific DC level compared with a capacitively coupled signal which swings about its average DC level (usually 0V). If the diode is removed from the clamper, it defaults to a simple coupling capacitor– no clamping. What is the clamp voltage? And, which peak gets clamped? Why is this so? Produce a schematic diagram with LTspice schematic capture program. Voltage values: Capasitor value: 1000 pF DC offset: 0 V Amplitude: 5 V Freq: 1 KHz

Draw circuit diagram with the help of diodes. The current vs voltage graph at the output of the circuit  is shown below ...

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When the diode is connecting in Forward Bias the current of it is in order of .... .... Answer: