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Physics

Physics
Alternating current is converted into direct current by a

Transformer
Rectifier
Oscillator
Dynamo

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Physics
Which of the following metals is used for the manufacture of heating elements provided in electric iron ?

Tungsten
Nickel
Chromium
Nichrome

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Physics
A wheel-barrow is an example of

Class I lever
Pulley system
Class II lever
Class III lever

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Physics
What is the full form of "RADAR" ?

Region Device and Ranging
Radio Detect and Rangs
Radio Device and Ranging
Radio Detecting and Ranging

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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
100 W
Neither
25 W

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

White
Blue
Black
Grey

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