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Physics

Physics
Universal gates are

OR and NOT
AND and XOR
AND and OR
NAND and NOR

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Physics
Find the power of a convex lens if the image formed is at a distance of 16 cm from the lens when the object is placed on the other side of the lens at 20 cm from the optical centre?

11.25 diopters
3.75 diopters
-3.75 diopters
-11.25 diopters

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Physics
Which of the following are methods of heat transfer?

Thermal Expansion
Revolution
Evaporation
Convection

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Physics
The device used to change the speed of an electric fan is

Rectifier
Regulator
Switch
Amplifier

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Physics
Which has the lowest albedo?

None of these
Both A & B
Light surfaces
Dark surfaces

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Physics
In the electrical circuit of a house, the fuse acts as

A step down device
A load
A safety device
A thermopile

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