Question

The Vernier constant of Vernier callipers is 0.1 mm and it has zero error of (-0.05) cm. While measuring the diameter of a sphere, the main scale reading is 1.7 cm and the coinciding vernier division is 5. The corrected diameter will be ______ × 10^-2 cm.

Options

• 180

• 179

• 181

• 182

Answer 1

The Vernier constant of Vernier callipers is 0.1 mm and it has zero error of (-0.05) cm. While measuring the diameter of a sphere, the main scale reading is 1.7 cm and the coinciding vernier division is 5. The corrected diameter will be 180 × 10^-2 cm.

Explanation:

Because the zero error is negative, we must add 0.05 cm.

The corrected diameter will now be

= 1.7 cm + 5 × 0.1 mm + 0.05 cm

= 1.7 cm + 0.05 cm + 0.05 cm

= 1.8 cm

= 180 × 10^-2 cm

According to the question, the correct answer is 180.