The Common Base Configuration MCQ

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• The collector current is 2.945A and α=0.98. The leakage current is 2µA. What is the emitter current and base current?
  ক

  3mA and 55µA

  খ

  2.945mA and 55µA

  গ

  3.64mA and 33µA

  ঘ

  5.89mA and 65µA
• A transistor has an IE of 0.9mA and amplification factor of 0.98. What will be the IC?
  ক

  0.745mA

  খ

  0.564mA

  গ

  0.236mA

  ঘ

  0.882mA
• The relation between α and β is _________
  ক

  β=α/(1-α)

  খ

  α= β/(1+β)

  গ

  β=α/(1+α)

  ঘ

  α= β/(1- β)
• The negative sign in the formula of amplification factor indicates_________
  ক

  that IE flows into transistor while IC flows out it

  খ

  that IC flows into transistor while IE flows out it

  গ

  that IB flows into transistor while IC flows out it

  ঘ

  that IC flows into transistor while IB flows out it
• Determine the value of emitter current and collector current of a transistor having α=0.98 and collector to base leakage current ICBO=4µA. The base current is 50µA.
  ক

  1.5mA

  খ

  3.7mA

  গ

  2.7mA

  ঘ

  4.5mA
• The emitter current IE in a transistor is 3mA. If the leakage current ICBO is 5µA and α=0.98, calculate the collector and base current.
  ক

  3.64mA and 35µA

  খ

  2.945mA and 55µA

  গ

  3.64mA and 33µA

  ঘ

  5.89mA and 65µA
• In CB configuration, the value of α=0.98A. A voltage drop of 4.9V is obtained across the resistor of 5KΩ when connected in collector circuit. Find the base current.
  ক

  0.01mA

  খ

  0.07mA

  গ

  0.02mA

  ঘ

  0.05mA
• The value of αac for all practical purposes, for commercial transistors range from_________
  ক

  0.5-0.6

  খ

  0.7-0.77

  গ

  0.8-0.88

  ঘ

  0.9-0.99
• The AC current gain in a common base configuration is_________
  ক

  -∆IC/∆IE

  খ

  ∆IC/∆IE

  গ

  ∆IE/∆IC

  ঘ

  -∆IE/∆IC