Electronics BSc I (Unit 1 & 2)

Application of Norton's theorem to a circuit yields

• Equivalent current source and impedence in series

• Equivalent current source and impedence in parallel

• Equivalent impedence

• Equivalent current source

In Superposition theorem, while considering a source, all other voltage sources are?

• open circuited

• short circuited

• change its position

• removed from the circuit

The maximum power is delivered from a source to its load when the load resistance is ______ the source resistance.

• greater than

• less than

• equal to

• less than or equal to

During reverse bias, a small current develops known as

• Forward current

• Reverse current

• Reverse saturation current

• Active current

A PN junction is said to be forward-biased when

• 1. The positive terminal of the battery is connected to P-side and the negative side to the N-side

• 1. Junction is earthed

• 1. N-side is connected directly to the p-side

• 1. The positive terminal of the battery is connected to N-side and the negative side to the P-side.

In a reverse-biased PN junction, the current through the junction increases abruptly at

• 1. 0.5 V

• 1. 1.1 V

• 1. 0.72 V

• 1. Breakdown voltage

The forward current in PN diode is due to ________________________?

• Thermionic emission

  
  

• Diffusion current

• Both a and b

• None of the above

  
  

What are the applications of the PN junction diode?

• Can be used as a photodiode

  
  

• Can be used as solar cell

• Can be used as rectifiers

• All of the above

Which one of the following is used for constant current source?

• Current regulator

• Zener diode

• Varactor diode

• None of the above

In which one of the following the current flows easily?

• Conductors

• Semiconductors

• Insulators

• None of the above