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A dc power supply has no load voltage of 30 V and full load voltage of 25 V at full load current of 1 A. The output resistance and voltage regulation respectively are
  • a)
    5 Ω and 25%
  • b)
    25 Ω and 20%
  • c)
    5 Ω and 16.7%
  • d)
    25 Ω and 16.7%
Correct answer is option 'B'. Can you explain this answer?
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Calculating Output Resistance and Voltage Regulation:

1. Output Resistance:
- The output resistance can be calculated using the formula:
Output Resistance = (No Load Voltage - Full Load Voltage) / Full Load Current
Output Resistance = (30 V - 25 V) / 1 A
Output Resistance = 5 Ω

2. Voltage Regulation:
- Voltage regulation is given by the formula:
Voltage Regulation = ((No Load Voltage - Full Load Voltage) / Full Load Voltage) * 100%
Voltage Regulation = ((30 V - 25 V) / 25 V) * 100%
Voltage Regulation = (5 V / 25 V) * 100%
Voltage Regulation = 20%

Therefore, the correct answer is option 'B': 25 Ω and 20% for output resistance and voltage regulation, respectively.
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