Physics

Que. The word ‘Physics’ is written on a sheet of white paper with a red pencil. A green an

Que. The word ‘Physics’ is written on a sheet of white paper with a red pencil. A green and red pieces of glass are available. Through which glass can the word be seen?

Ans. With green glass the word will appear black against the green background of the paper since the red colour of the word does not pass through green glass. Thus green glass should be used.

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12th March 2019

Aakashshaw

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A soap bubble is given a negative charge, then it's radius Decrease Increase Unchanged or nothing can be predicted.?

A soap bubble is given a negative charge, then it's radius 

a)Decrease

b)Increase

c)Remains unchanged

d)Unchanged or nothing can be predicted.?

Solution:

Negatively charge will be uniformly distributed over the surface leading to repulsion between the charges and increasing the size of bubble.  


06th March 2019

jee preparation

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