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Physics

Physics
Which of the following cannot be used for making lenses?

Soil
Plastic
Water
Glass

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Physics
Visible light has a higher frequency than

Ultra violet
Radio waves
X rays
All listed here

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Physics
Instrument used to study the behaviour of a vibrating string is :

Sonometer
Hydrometer
Hygrometer
Barometer

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Physics
A person does some work of 1,000 J in 2 s. His power will be ________

50W
500W
25W
1000W

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Physics
The spring constant of a spring depends on its

Length and its diameter
Length only
Thickness, its diameter and its material
Material only

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Physics
What is the resistance (in ohm) of an electrical component if a current of 0.1 A passes through it on application of 5 V of potential difference across it?

100
1
50
0.5

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