Physics
A copper disc has a hole. If the disc is heated, the size of the hole

First increases and than decreases
Increases
Decreases
No change

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Physics
Which one of the following is the correct sequence of passage of light in a compound microscope?

Condenser -Objective lens -Body tube -Eyepiece
Objective lens -Condenser -Body tube -Eye piece
Eyepiece -Objective lens -Body tube -Mirror
Condenser -Objective lens -Eye -piece -Body tube

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Physics
Solar eclipse will take place when

the earth is between the moon and the sun
the moon does not lie on the line joining the sun and the earth
the sun is between the moon and the earth
the moon is between the sun and the earth

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