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Physics

Physics
If a person moves a trolley for a distance of 10 m with a force of 50 N, then the work done is

0.2 J
5 J
500 J
20 J

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Physics
If the velocity-time graph of a particle is represented by y = mt + c, then the particle is moving with

Varying acceleration
Constant acceleration
Constant speed
Constant velocity

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Physics
The colours of stars depend on their

Temperature
Radius
Distance
Atmospheric pressure

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Physics
Who among the following discovered X-rays?

W.C Roentgen
Marie Curie
J.J Thomson
James Chadwick

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Physics
Working of safety fuses depends upon1. magnetic effect of the current2. chemical effect of the current3. magnitude of the current4. heating effect of the currentSelect the correct answer using the code given below.

1, 2 and 3 only
3 and 4 only
4 only
1, 2, 3 and 4

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Physics
A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because

A parachute has a larger surface area and air resistance is more
None of these
Special mechanisms are present in parachute
Stone is heavier than parachute

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