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The zener voltage in the circuit shown is V _ Z =20 ~V . The load resistance R _ L =5 k and the resistance R s =10 k . If the input voltage is V s =100 ~V , then the current through the zener diode in milliampere is:

Options

  1. A8
  2. B5
  3. C4
  4. D6

Correct answer

C. 4

Step-by-step solution

The circuit is a Zener diode voltage regulator. The Zener diode is connected in parallel with the load resistor R_L . Given values: V_S = 100 V R_S = 10 k = 10000 R_L = 5 k = 5000 V_Z = 20 V Since the Zener diode is in parallel with the load resistor R_L , the voltage across the load resistor V_L is equal to the Zener voltage V_Z . V_L = V_Z = 20 V The total current I flowing through the series resistor R_S is given by: I = V_S - V_Z R_S = 100 - 20 10000 = 80 10000 = 8 10⁻³ A = 8 mA The current flowing through the

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