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Physics

Physics
Lens is made up of which glass

Flint glass
Ordinary glass
Pyrex glass
Cobalt glass

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Physics
Rectifiers are used to convert:

Low voltage to high voltage
Alternating current to Direct current
High voltage to low voltage
Direct current to Alternating current

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Physics
Permissible noise level at Residential area during night time is :

55 dB (A)
80 dB (A)
45 dB (A)
75 dB (A)

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Physics
A small piece of a substance is weakly attracted by a strong magnetic field. The substance is

Diamagnetic
Paramagnetic
Non-magnetic
Ferromagnetic

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Physics
When a vehicle passes, TV reception gets distorted. This is because

Metal reflects radiowaves
Modern vehicles use electroignition system
Vehicle pollution affects the performance of the TV components
Spark plug creates electromagnetic disturbances

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Physics
Period of oscillation of 3 cm microwaves in seconds is

1 × 10–10
0.01
0.001
1 × 1010

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MORE MCQ ON Physics

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