IIT JEE 2007 Practice : PHYSICS - Multiple Choice

Each question below has only one correct answer.
In the IIT-JEE, you will be awarded 3 marks for each correct answer and −1 for each incorrect answer.
You will be awarded 0 marks for not attempting a question.

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Multiple choice

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A screw gauge has 50 divisions on its circular scale and the main scale moves by 1.0 mm in one complete rotation of circular scale. The diameter of a metal ball is measured using this screw gauge. Two positions of the screw gauge are shown in the figure, one before clamping the ball in the screw gauge and one after clamping it. The diameter of the ball is:   2.25 mm   2.50 mm   2.40 mm   1.20 mm   Hint Half-n-half Clue

 

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