Multiple choice

Directions: A brief passage or a statement is given, and a question is asked, based on the information provided by the passage/statement. The question has four alternatives marked 1 to 4. Critically examine them and choose the best answer.

As per the law of floatation, when a body floats in a liquid, the weight of the body must be equal to the weight of the displaced liquid. Which of the following conditions completes the above law?

  1. The centre of gravity of the body and the centre of gravity of the displaced liquid must be in the same vertical line.

  2. Liquids transmit pressure equally in all directions.

  3. Law of floatation is the principle applied in a hydraulic press.

  4. A steel bar sinks in alcohol, but floats in mercury.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

(4) It is because of the difference in the weights.

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