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Which of the following condition is true for cut-off mode?

Which of the following condition is true for cut-off mode?

  1. the collector current is zero
  2. the collector current is proportional to the base current
  3. the base current is non zero
  4. all of the mentioned
discuss
Which of the following is true for the cut- off region in an npn transistor?

Which of the following is true for the cut- off region in an npn transistor?

  1. potential difference between the emitter and the base is smaller than 0.5v
  2. potential difference between the emitter and the base is smaller than 0.4v
  3. the collector current increases with the increase in the base current
  4. the collector current is always zero and the base current is always non zero
discuss
Which of the following is true for a typical active region of an npn transistor?

Which of the following is true for a typical active region of an npn transistor?

  1. the potential difference between the emitter and the collector is less than 0.5 v
  2. the potential difference between the emitter and the collector is less than 0.4 v
  3. the potential difference between the emitter and the collector is less than 0.3 v
  4. the potential difference between the emitter and the collector is less than 0.2 v
discuss
Which of the following is true for the active region of an npn transistor?

Which of the following is true for the active region of an npn transistor?

  1. the collector current is directly proportional to the base current
  2. the potential difference between the emitter and the collector is less than 0.4 v
  3. all of the mentioned
  4. none of the mentioned
discuss
Which of the following is true for a npn transistor in the saturation region?

Which of the following is true for a npn transistor in the saturation region?

  1. the potential difference between the collector and the base is approximately 0.2v
  2. the potential difference between the collector and the base is approximately 0.3v
  3. the potential difference between the collector and the base is approximately 0.4v
  4. the potential difference between the collector and the base is approximately 0.5v
discuss
The potential difference between the base and the collector Vcb in a pnp transistor in saturation region is

The potential difference between the base and the collector Vcb in a pnp transistor in saturation region is

  1. -0.2 v
  2. -0.5v
  3. 0.2 v
  4. 0.5 v
discuss
For a pnp transistor in the active region the value of Vce (potential difference between the collector and the base) is

For a pnp transistor in the active region the value of Vce (potential difference between the collector and the base) is

  1. less than 0.3v
  2. less than 3v
  3. greater than 0.3v
  4. greater than 3v
discuss
Which of the following is true for a pnp transistor in active region?

Which of the following is true for a pnp transistor in active region?

  1. cb junction is reversed bias and the eb junction is forward bias
  2. cb junction is forward bias and the eb junction is forward bias
  3. cb junction is forward bias and the eb junction is reverse bias
  4. cb junction is reversed bias and the eb junction is reverse bias
discuss
Which of the following is true for a pnp transistor in saturation region?

 Which of the following is true for a pnp transistor in saturation region?

  1. cb junction is reversed bias and the eb junction is forward bias
  2. cb junction is forward bias and the eb junction is forward bias
  3. cb junction is forward bias and the eb junction is reverse bias
  4. cb junction is reversed bias and the eb junction is reverse bias
discuss
For the circuit shown, find the quiescent point

For the circuit shown, find the quiescent point.

  1. none of the below
  2. (4v, 10ma)
  3. (10v, 3ma)
  4. (3ma, 10v)
discuss
What is the DC characteristic used to prove that the transistor is indeed biased in saturation mode?

What is the DC characteristic used to prove that the transistor is indeed biased in saturation mode?

  1. ic = βib
  2. ic > βib
  3. ic >> βib
  4. ic < βib
discuss
For the circuit shown, find the quiescent point

For the circuit shown, find the quiescent point.

  1. none of the below
  2. (4v, 10ma)
  3. (10v, 3ma)
  4. (3ma, 10v)
discuss
The feature of an approximate model of a transistor is

The feature of an approximate model of a transistor is

  1. it helps in quicker analysis
  2. it provides individual analysis for different configurations
  3. it helps in dc analysis
  4. ac analysis is not possible
discuss
005mmhos, hre=0. Find the output impedance if the lad resistance is 5kΩ

005mmhos, hre=0. Find the output impedance if the lad resistance is 5kΩ.

  1. 5kΩ
  2. 4kΩ
  3. 20kΩ
  4. 15kΩ
discuss
A transistor has hie =2kΩ, hoe=25µmhos and hfe=60 with an unbypassed emitter resistor Re=1kΩ. What will be the input resistance and output resistance?

A transistor has hie =2kΩ, hoe=25µmhos and hfe=60 with an unbypassed emitter resistor Re=1kΩ. What will be the input resistance and output resistance?

  1. 90kΩ and 50kΩ respectively
  2. 33kΩ and 45kΩ respectively
  3. 6kΩ and 40kΩ respectively
  4. 63kΩ and 40kΩ respectively
discuss
A transistor has hie =1KΩ and hfe=60 with an bypassed emitter resistor Re=1kΩ. What will be the input resistance and output resistance?

A transistor has hie =1KΩ and hfe=60 with an bypassed emitter resistor Re=1kΩ. What will be the input resistance and output resistance?

  1. 90kΩ and 50kΩ respectively
  2. 33kΩ and 45kΩ respectively
  3. 6kΩ and 40kΩ respectively
  4. 63kΩ and 40kΩ respectively
discuss
In the given circuit, find the equivalent resistance between A and B nodes

 In the given circuit, find the equivalent resistance between A and B nodes.

  1. 100kΩ
  2. 50kΩ
  3. 40kΩ
  4. 60kΩ
discuss
Which of the following acts as a buffer?

Which of the following acts as a buffer?

  1. cc amplifier
  2. ce amplifier
  3. cb amplifier
  4. cascaded amplifier
discuss
Which of the following is true?

Which of the following is true?

  1. cc amplifier has a large current gain
  2. ce amplifier has a large current gain
  3. cb amplifier has low voltage gain
  4. cc amplifier has low current gain
discuss
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

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.

  1. 0.01ma
  2. 0.07ma
  3. 0.02ma
  4. 0.05ma
discuss
total MCQs: 219

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