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Physics

Physics
Period of oscillation of 3 cm microwaves in seconds is

1 × 1010
0.001
1 × 10–10
0.01

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Physics
A body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. The work done by the force will be ________

40 J
20 J
50 J
30 J

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Physics
The rate of flow of electric charge is measured in

Coulomb
Ampere
Ampere-coulomb
Ampere/coulomb

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Physics
Choose the most appropriate answer: In which atmospheric layer are the communication satellites located?

Ionosphere
Stratosphere
Mesosphere
Troposphere

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Physics
Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?

4.33 diopters
-4.33 diopters
12.33 diopters
-12.33 diopters

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Physics
Land is considered a resource because it

Costs little or nothing to use
Is used to produce things
Is always available to use
Requires labor to be useful

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