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Two diodes have resistance 20 \Omega and is centretapped with rms secondary voltage from centre tap to each end of secondary 50 \mathrm{~V}. If external resistance is 980 \Omega. What is mean load?

Option: 1

0.05 \mathrm{~mA}


Option: 2

45 \mathrm{~mA}


Option: 3

0.25 \mathrm{~A}


Option: 4

25 \mathrm{~mA}


Answers (1)

best_answer

Maximum load current
\mathrm{I_m=\frac{V_m}{r_f+R_L}=\frac{50 \sqrt{2} \mathrm{~V}}{(20+980) \Omega} =70.7 \mathrm{~mA} }
\mathrm{\therefore Mean\, \, load\, \, current. I_{D C}=\frac{2 I_m}{\pi}=\frac{2 \times 70.7}{\pi}=45 \mathrm{~mA} }

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