## Archimedes principle-Basic

Compared to other sections, Physics is considered to be the most scoring section. If prepared thoroughly, Physics can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. A block of steel of size 5 cm × 5 cm × 5 cm is weighed in water. If the relative density of steel is 7, its apparent weight is

•  6 × 5 × 5 × 5 gf
•  4 × 4 × 4 × 7 gf
•  5 × 5 × 5 × 7 gf
•  4 × 4 × 4 × 6 gf

6 × 5 × 5 × 5 gf

Q2. A body is just floating on the surface of a liquid. The density of the body is same as that of the liquid. The body is slightly pushed down. What will happen to the body

•  It will slowly come back to its earlier position
•  It will remain submerged, where it is left
•  It will sink
•  It will come out violently

It will sink

Q3. A cork is submerged in water by a spring attached to the bottom of a bowl. When the bowl is kept in an elevator moving with acceleration downwards, the length of spring

•  Increases
•  Decreases
•  Remains unchanged
•  None of these

Increases

Q4.  A rectangular block is 5 cm × 5 cm × 10cm in size. The block is floating in water with 5 cm side vertical. If it floats with 10 cm side vertical, what change will occur in the level of water?

•  No change
•  It will rise
•  It will fall
•  It may rise or fall depending on the density of block

No change

Q5.  A ball whose density is 0.4 × 103 kg/m3 falls into water from a height of 9 cm . To what depth does the ball sink

•  9 cm
•  6 cm
•  4.5 cm
•   2.25 cm

6 cm

Q6.  A boat carrying steel balls is floating on the surface of water in a tank. If the balls are thrown into the tank one by one, how will it affect the level of water

•  It will remain unchanged
•  It will rise
•  It will fall
•   First it will first rise and then fall

It will fall

Q7. Two pieces of metal when immersed in a liquid have equal upthrust on them; then

•  Both pieces must have equal weights
•  Both pieces must have equal densities
•  Both pieces must have equal volumes
•  Both are floating to the same depth

Both pieces must have equal volumes

Q8. A wooden cylinder floats vertically in water with half of its length immersed. The density of wood is

•  Equal of that of water
•  Half the density of water
•  Double the density of water
•  The question is incomplete

Half the density of water

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Archimedes principle-Basic