ESE EC 2018 Achiever Study plan: Basic Electronics Quiz 1

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Question 1

Which of the following materials is used in lightemitting diodes ?

• AGallium arsenide sulphate
• BGallium arsenide phosphide
• CGallium chromate phosphide
• DGallium phosphide sulphate

Question 2

A rolled-paper capacitor of value 0.02μF is to be constructed using two strips of aluminum of width 6 cm, and wax impregnated paper of thickness 0.06 mm whose relative permittivity is 3. The length of foil strips should be:

• A0.3765 m
• B0.4765 m
• C0.5765 m
• D0.7765 m

Question 3

What is the value of current I through the ideal diode in the circuit?

• A100mA
• B150 mA
• C200 mA
• D250 mA

Question 4

In a career recombination of electrons and holes, which among following recombination releases kinetic energy?

• ARadiative recombination
• BNon-radiative recombination
• CAuger recombination
• DTrap-assisted recombination

Question 5

In Full Wave Bridge Rectifier Circuit shown, in positive cycle:

• ADiode D1 and Diode D2 conducts
• BDiode D3 and Diode D4 conducts
• CDiode D1 and Diode D2 off
• DDiode D1 and Diode D3 conducts

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