TS EAMCET · Physics · Semiconductors
In a Zener regulated power supply a Zener diode with \(V_z=6 \mathrm{~V}\) is used for regulation. The load current is \(4 \mathrm{~mA}\) and the unregulated input voltage is \(10 \mathrm{~V}\). To get a Zener current five times the load current the value of series resistor \(R_S\) is nearly
- A \(150 \Omega\)
- B \(167 \Omega\)
- C \(175 \Omega\)
- D \(159 \Omega\)
Answer & Solution
Correct Answer
(B) \(167 \Omega\)
Step-by-step Solution
Detailed explanation
Given, \(I_Z=5 I_L=20 \mathrm{~mA}\) Total current \(I_s\) through \(R_s\) is \(I_s=I_Z+I_L\) \(=20+4=24 \mathrm{~mA}\) As a potential drop of \(6 \mathrm{~V}\) occurs across Zener diode and supply voltage is \(10 \mathrm{~V}\). So, potential drop across…
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