A power supply can deliver a maximum rated current of 0.5 A at full-load output voltage of 20 V. What is the minimum load resistance that you can connect across the supply?
Correct answer: D. 40 O
- A. 10 O
- B. 20 O
- C. 15 O
- D. 40 O
Explanation
At the maximum rated current, the smallest permissible resistance is given by Ohm’s law: R = V/I = 20/0.5 = 40 Ω. A lower resistance would demand more than the supply’s rated current.
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