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Electronic Mechanic Mock test. We covered all the Electronic Mechanic Mock test in this post for free so that you can practice well for the exam.
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Electronic Mechanic Mock test for Students
According to the Edison effect, if a metal plate around the cathode is held at a positive potential relative to the cathode
a) Electrons emitted from the cathode will move to the plate, producing an electric current
b) Electrons will not be emitted
c) Electrons will reach the plate but no current will flow
d) None of the above
Option a – Electrons emitted from the cathode will move to the plate, producing an electric current
The rectifier efficiencies for half-wave and full-wave rectifiers are
a) 40.6% and 81.2%
b) 35.6% and 71.4%
c) 39.8% and 76.9%
d) 30.6% and 61.2%
Option a – 40.6% and 81.2%
In an NPN transistor circuit, the collector current is 10 mA. If 95% of electrons reach the collector, the Base current is
a) 10.53 mA
b) 0.53 mA
c) 11.06 mA
d) None of the above
Option b – 0.53 mA
How does the barrier potential of a P-N junction diode change with biasing?
a) Decreases with both reverse and forward bias
b) Increases with both reverse and forward bias
c) Increases with reverse bias and decreases with forward bias
d) Increases with forward bias and decreases with reverse bias
Option c – Increases with reverse bias and decreases with forward bias
Which filter circuit is suitable for high load current?
a) T-section filter
b) L-section filter
c) Series inductance filter
d) Shunt Capacitor filter
Option c – Series inductance filter
For intrinsic semiconductors, the number of electrons in the conduction band
a) Equals the number of holes in the valence band
b) Equals the number of filled positions in the valence band
c) Is less than the number of holes in the valence band
d) None of the above
Option a – Equals the number of holes in the valence band
An Atom that donates one electron to the conduction band of pure Germanium is called
a) Tetravalent Atom
b) Divalent Atom
c) Pentavalent Atom
d) None of these
Option c – Pentavalent Atom
Which element produces an n-type extrinsic semiconductor when added to pure Ge?
a) Antimony
b) Cadmium
c) Gallium
d) Indium
Option a – Antimony
At what temperature are the conduction band empty and the valence band fully occupied in semiconductors?
a) 300 K
b) 273 K
c) 0 K
d) 0°C
Option c – 0 K
Statements regarding semiconductors: 1. Semiconductors have a negative temperature coefficient of resistance 2. Phosphorus, sulfur, and chlorine are semiconductors 3. Their electrical conductivity is strongly affected by small amounts of impurities 4. None of the above. Codes:
a) Only (1) and (2)
b) Only (3)
c) Only (2) and (3)
d) None of the above
Option a – Only (1) and (2)
Adding a P-type impurity to an intrinsic semiconductor results in
a) Decrease in free electron concentration below intrinsic value
b) Increase in the number of holes above intrinsic value
c) Decrease in the number of holes below intrinsic value
d) None of the above
Option a – Decrease in free electron concentration below intrinsic value
We covered all the electronic mechanic mock test above in this post for free so that you can practice well for the exam.
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Also, check out:
- Physics Question Paper Class 9 ICSE
- Goyal Brothers Prakashan Class 9 Physics Workbook Solutions
- S Chand Class 10 Physics Electricity Solutions
