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Physics

Physics
An object which absorbs all colours and reflects none appears:

White
Grey
Black
Blue

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Physics
Which of the following instruments is used to measure humidity ?

Sling Psychrometer
Kata Thermometer
Clinical Thermometer
Anemometer

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Physics
The purpose of choke in a fluorescent lamp is :

Ro decrease the voltage momentarily
To decrease the current flow
To increase the current flow
To decrease the resistance

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Physics
The temperature which has the same reading on both Fahrenheit and Celsius scales is

40°
–40°
32°
0°

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Physics
Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?

Both
25 W
Neither
100 W

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Physics
A spring is an example of which of these

Conservation of mass law
Newton's 1st law
Newton's 3rd law
Hooke's law

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