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Physics

Physics
Good conductor of electricity is

Kerosene
Graphite
Paper
Dry air

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Physics
For a freely falling body, the sum of kinetic energy and potential energy is always

Same
Variable
Zero
Unity

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Physics
An electric iron of 750 W is used for S hours per day. Then the energy consumed in one day by the iron is:

0.6 units
600 units
60 units
6 units

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Physics
The fact that two large ships travelling on close parallel courses in the same direction tend to move towards each other can be explained by

Newton's third law of motion
Bernoulli's principle
Earth's gravitational force
Magnetic properties of the ship's material

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Physics
Which one of the following animals can hear ultrasonic sound ?

Cat
Rat
Squirrel
Bat

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Physics
In quantum mechanics a particle is represented by a

None of these
Particle
Wave
Wave packet

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