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The following question based on electric current and magnetism topic of general science mcq
(a) both microscope and telescope
(b) a microscope
(c) a telescope
(d) neither microscope nor telescope
The correct answers to the above question in:
Answer: (c)
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Read more physics gk Based General Science Questions and Answers
Question : 1
Some pairs of devices and associated energy changes are given below.
- Electric generator - Mechanical to electrical
- Electric motor - Electrical to mechanical
- Diesel engine - Light to electrical
- Solar cell - Chemical to mechanical
a) 2 and 4
b) 1 and 2
c) 1 and 3
d) 3 and 4
Answer »Answer: (b)
Question : 2
When an optician prescribes a – 5D lens, what does it mean?
a) Concave lens of 5 cm focal length
b) Concave lens of 20 cm focal length
c) Convex lens of 5 cm focal length
d) Convex lens of 5 cm focal length
Answer »Answer: (b)
Question : 3
The device used for converting alternating current to direct current is called
a) Transformer
b) Inverter
c) Rectifier
d) Transmitter
Answer »Answer: (c)
Question : 4
In charging a battery of motor car, the following effect of electric current is used
a) heating
b) chemical
c) magnetic
d) induction
Answer »Answer: (b)
Chemical effect of current is used in charging a car battery.
Question : 5
A piece of copper and another of germanium are cooled from room temperature to 80 K. The resistance of
a) each of them decreases
b) copper increases and germanium decreases
c) each of them increases
d) copper decreases and germanium increases
Answer »Answer: (d)
Question : 6
Full form of C.F.L. is
a) Chemical Fluorescent Lamp
b) Compact Fluorescent Lamp
c) Centrally Fixed Lamp
d) Condensed Fluorescent Lamp
Answer »Answer: (b)
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