Characteristic Equation of Diode-2 MCQ

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• If V1 is 5V and resistance R1 is 5KΩ and the cut-in voltage of the diode is 0.7V, what will be the voltage Vout across the diode? Take reverse saturation current as 10-8A and operating temperature as 25°C.
  ক

  0V

  খ

  -4.5V

  গ

  -5V

  ঘ

  -3.2V
• The input voltage V1 of the circuit the circuit is 2V and resistor has a resistance of 1KΩ. The cut-in voltage of the silicon diode is 0.7V and the reverse saturation current is 10-8A. The temperature at which diode operates is 30°C. The voltage across resistor when diode starts conducting is _________________
  ক

  0.7V

  খ

  1.3V

  গ

  0.306V

  ঘ

  1.7V
• How much times reverse saturation current will increase if temperature increases 15oC?
  ক

  2.52

  খ

  4.62

  গ

  4.12

  ঘ

  2.82
• The reverse saturation current of a diode at 25°C is 1.5 x 10-9A. What will be the reverse current at temperature 30°C?
  ক

  3 x 10-9A

  খ

  2 x 10-9A

  গ

  2.12 x 10-9A

  ঘ

  1.5 x 10-9A
• If the temperature increases 10°C, the ratio of final reverse saturation current to initial reverse saturation current is _______
  ক

  1

  খ

  2

  গ

  1.5

  ঘ

  3
• If the current I is 2mA then find the temperature at which diode operates. The cut-in voltage of diode is 0.6V. The reverse saturation current of diode is 10-9A. Resistance R is 1.3KΩ.
  ক

  45.85°C

  খ

  50.47°C

  গ

  60.26°C

  ঘ

  56.89°C
• Find the current Ix if the voltage across the diode is 0.5V. The reverse saturation current of diode 10-11A, the cut-in voltage of diode is 0.6V. Assume that the temperature at which diode operates is 25°C. The resistance R1=2KΩ.
  ক

  3.97mA

  খ

  4.51mA

  গ

  2.45mA

  ঘ

  3.05mA
• The current Ix in the circuit is 1mA then find the voltage across diode D1. The resistance R1 is 1KΩ. Assume the reverse saturation current is 10-9A. Voltage across resistor in this condition was 0.4V. Take VT of diode as 0.026V.
  ক

  2.3mA

  খ

  3.2mA

  গ

  5.2mA

  ঘ

  4.6mA
• Find voltage VOUT if the reverse saturation current of the diode is 1.1×10-8A, the cut-in voltage of diode is 0.6V and assume the temperature as 25oC.
  ক

  0.235V

  খ

  0.3148V

  গ

  0.456V

  ঘ

  0.126V
• Find the current I if both diodes are identical. Voltage V = 0.8V and let the reverse saturation current be 10-9A.
  ক

  4.8mA

  খ

  3.2mA

  গ

  2.5mA

  ঘ

  7mA