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Units and Measurements question

2022 · 26 Jul · Shift 1 · Q63
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Units and Measurements question

2022 · 26 Jul · Shift 1 · Q63

JEE MainPhysicsUnits and MeasurementsMCQ+4 / −1
A screw gauge of pitch 0.5 mm0.5 \mathrm{~mm}0.5 mm is used to measure the diameter of uniform wire of length 6.8 cm6.8 \mathrm{~cm}6.8 cm, the main scale reading is 1.5 mm1.5 \mathrm{~mm}1.5 mm and circular scale reading is 7 . The calculated curved surface area of wire to appropriate significant figures is : [Screw gauge has 50 divisions on its circular scale]
  1. A
    6.8 cm2
  2. B
    3.4 cm2
  3. C
    3.9 cm2
  4. D
    2.4 cm2
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