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Chapter 18 - Electronics - 5
1.
Conversion of only one half of AC into DC is called:
a) Full wave rectification
b) Half wave amplification
c) Full wave amplification
d) Half wave rectification
2.
Identify which instrument can be used for rectification:
a) Transistor
b) Diode (or p-n junction)
c) Inductor
d) Transformer
3.
In a half wave rectifier, the diode conducts:
a) A portion of a positive half of a in put cycle
b) A portion of a negative half of input cycle
c) One half of the input cycle
d) Input cycle
4.
In full-wave rectification by bridge the number of diodes required are:
a) Four
b) Only one
c) Infinite
d) Three
5.
Rectification process needs:
a) An AC source + load
b) An diode+load only
c) An AC source+load +diode+transformer
d) An AC source+load+diode only
6.
Identify which instrument out of the following is only based upon p-n junction:
a) Photo voltic cell
b) All of the above
c) Light emitting diode (LED)
d) Photodiode
7.
LED’s work on the basis of :
a) Faradays Law
b) Emission of energy in the form of photons
c) Ionic bonding b/w p-type and n-type substance
d) None
8.
Photo diode can be used:
a) Logic circuits and optical communication devices
b) All
c) Only for detection of light
d) As a automatic ON and OFF switch
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