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?

-12.33 diopters
4.33 diopters
12.33 diopters
-4.33 diopters

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Physics
Rain drops fall from great height. Which among the following statements is true regarding it?

Their velocity increases and they fall with different velocity on the earth
Their velocity increases and they fall with same velocity on the earth
They fall with that ultimate velocity, which are different for different droplets
They fall with same ultimate velocity

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Physics
Two identical solid pieces, one of gold and other of silver, when immersed completely in water exhibit equal weights. When weighed in air (given that density of gold is greater than that of silver)

Weighing will depend on their masses
The silver piece will weigh more
Both silver and gold pieces weigh equal
The gold piece will weigh more

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Physics
In the process of magnetisation of a bar

Only the surface of the bar gets magnetised
Only the ends of the bar get magnetised
The entire bulk of the bar gets magnetised
Only some parts of the outer layers of the bar get magnetised

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