In the circuit shown.

The transistor is biased at___________mA (your answer should be upto first decimal place)
    Correct answer is between '3.8,4.0'. Can you explain this answer?

    Manju answered  •  2 hours ago
    Since, emitter junction is F.B. So BJT is not in cut-offmode. It maybe either active or saturation region.
    Let us assume transistor in active region.
    Then, applying KVL at base-emitter loop.
    2.7 - 40 K IB -0.7 = 0
    40 K IB = 2
    IB = 0.05 mA

    Applying KVL at emitter collector loop.


    Since, VCE < 0.5, so transistor is not in active region it is saturation region.

    The phenomenon known as ‘Early effect’ in a bipolar transistor refers to a reduction of the effective-basewidth caused by___
    • a)
      Electron-hole recombination at the base
    • b)
      The reverse biasing of the base-collector junction 
    • c)
      The forward biasing of emitter-base junction
    • d)
      The early removal of stored base charge during saturation to cut-off switching
    Correct answer is option 'B'. Can you explain this answer?

    Om Parkash answered  •  2 hours ago
    In a bipolar transistor, the increase in the depletion region of the reverse biased junction, tends to decrease the width of the base with increased reverse voltage. This in turn causes the current gain to increase with increased voltage resulting in a nearly linear increase in current even with the device in the saturation.

    In the circuit shown
    • a)
    • b)
      Y = (A + B)C
    • c)
    • d)
      Y = AB + C
    Correct answer is option 'A'. Can you explain this answer?

    Jai Parkash answered  •  2 hours ago
    Parallel connection of MOS ⇒ OR operation
    Series connection of MOS ⇒ AND operation
    The pull-up network acts as an inverter. From pull down network we write

    If light was of purely wave nature, the total energy radiated by a black-body would be (T is the temperature of the blackbody)
    • a)
      Zero
    • b)
      Proportional to T4   
    • c)
      Proportional to T   
    • d)
      Infinite
    Correct answer is option 'D'. Can you explain this answer?

    Amar Singh answered  •  13 hours ago
    If light was of purely wave nature, then electromagnetic wave theory predicts that the total energy radiated by a black body over all wavelength is infinite. This is known as ultraviolet catastrophe.

    For the transistor shown below. β = 30 and VCEQ = 6 V. The value ofV1 is
    • a)
      2.1 V 
    • b)
      6.43 V
    • c)
      4.8 V
    • d)
      3.97 V
    Correct answer is option 'D'. Can you explain this answer?

    Bhinder Singh answered  •  13 hours ago
    Given β = 30, VCE = 6 V " quiscent point", V1 = ?

    We know VBE = 0.7 V, “Si” BJT


    K C L at point “A ” 
    Put value of IB, V1 = 3.955

    The following figure shows the data of students enrolled in 5 years (2014 to 2018) for two schools P and Q. During this period, the ratio of the average number of the students enrolled in school P to the average of the difference of the number of students enrolled in schools P and Q is ________ .​
    • a)
      8 : 23
    • b)
      23 : 8
    • c)
      23 : 31
    • d)
      31 : 23
    Correct answer is option 'B'. Can you explain this answer?

    Moji Ram answered  •  yesterday
    Average number of students in school,

    Average number of students in school,

    Difference of the number of students enrolled in school P and Q

    Ratio of the average number of the students enrolled in school P to the average of the difference of the number of students enrolled in schools P and Q is = 23 : 8

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