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Free gk questions Online Test - MeritNotes
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Online Exam
No. of Questions :10
Remaining Time :
1. A diode can be used for
(a)
Amplification
(b)
Rectification
(c)
Modulation
(d)
Detection
2. If a high power heater is connected to electric mains, then the bulbs in the house become dim because there is a
(a)
Current drop
(b)
Potential drop
(c)
No current drop
(d)
No potential drop
3. In black and white televisions, pictures on the screen are produced due to bombardment of
(a)
Electrons on a white screen
(b)
Electrons on a fluorescent white screen
(c)
X-ray photons on a white fluorescent screen
(d)
X-ray photons on a white screen
4. By increasing the number of turns in the coil, the strength of the magnetic field
(a)
First increases then decreases
(b)
Remains unchanged
(c)
Increases
(d)
Decreases
5. The resistance of material increases with temperature. It is a
(a)
Metal
(b)
Insulator
(c)
Semiconductor
(d)
None of these
6. Long distance short-wave radio broad casting uses
(a)
Ground wave
(b)
Sky wave
(c)
Ionospheric wave
(d)
Direct wave
7. A hole in p type semiconductor is
(a)
An excess electron
(b)
A missing electron
(c)
A missing atom
(d)
A donor level
8. The inherent property of all matter is/are
(a)
Para magnetism
(b)
Diamagnetism
(c)
Ferromagnetic
(d)
None of these
9. The work done in moving a positive charge on an equipotential surface is
(a)
Zero
(b)
Finite and negative
(c)
Finite and positive
(d)
Infinite
10. In a transistor
(a)
Both the emitter and the collector are equality doped
(b)
Emitter is more heavily doped than the collector
(c)
The base is made very thin and is lightly doped
(d)
Both (b) and (c)
