Can anybody help me with Questions 6 and 7 of the following: thanks In Figure 1

Question

Can anybody help me with Questions 6 and 7 of the following:

thanks

In Figure 1 below is a simple circuit for an unregulated DC power supply. Iin Vi out Cout Vout Figure 1: Simple unregulated linear power supply Q1. If the step-down transformer has 10V rms output, calculate the maximum open circuit voltage possible at the output. Q2. The peak to peak output voltage ripple of the unregulated linear power is dependant on the output capacitor size. Using suitable simplifications, derive a relationship between the peak to peak output voltage ripple (AV), output capacitor (Cout), line frequency () and find the average DC output current (l). (Hint: Use the relationships Q-CV and Q o idt, where Q is the charge in the capacitor, and t is time) Q3. Using the above relationship, calculate the value of the capacitor to achieve a maximum output ripple of 2V (peak-to-peak) at 200mA. Q4. Calculate the peak-to-peak ripple voltage created with this capacitor at the full load (1A) Q5. To achieve a maximum ripple of 2V (peak-to-peak) at full load; what capacitor value should be used? Q6. What is the purpose of the transformer, and how does it relate to safety of the user. Support your answer with some international standards relating to one special property of the step-down transformer used in the kit. Q7. If you are to measure an important property of this transformer (or any similar power transformer) for safety, what would you do?

Explanation / Answer

Question 6.

Answer: An isolation transformer is used in power electronic devices which serves following purposes:

Following are some international standards relating to isolating transformer:

Question7

Answer: we can measure following Important properties of tranformers:

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