A transformer coupled class A power amplifier has a load of 100 O on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?
Correct answer: D. 10 kO
- A. 5 kO
- B. 20 kO
- C. 100 kO
- D. 10 kO
Explanation
The primary-referred load is Zp = (Np/Ns)^2 Zs. With a 10:1 ratio and a 100-ohm secondary load, Zp = 10^2 × 100 = 10,000 ohms, or 10 kΩ.
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