There are two vernier calipers both of which have 1 cm divided into 10 equal divisions on the main scale. The Vernier scale of one of the calipers (C₁) has 10 equal divisions that correspond to 9 main scale divisions. The Vernier scale of the other caliper (C₂) has 10 equal divisions that correspond to 11 main scale divisions. The readings of the two calipers are shown in the figure. The measured values (in cm) by calipers C₁ and C₂ respectively, are 2 3 4 C₁ 5 0 10 2 3 4 C₂ 5 0 10
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Question

There are two vernier calipers both of which have 1 cm divided into 10 equal divisions on the main scale. The Vernier scale of one of the calipers (C₁) has 10 equal divisions that correspond to 9 main scale divisions. The Vernier scale of the other caliper (C₂) has 10 equal divisions that correspond to 11 main scale divisions. The readings of the two calipers are shown in the figure. The measured values (in cm) by calipers C₁ and C₂ respectively, are 2 3 4 C₁ 5 0 10 2 3 4 C₂ 5 0 10

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G1 Physics · Accepted Answer

For C₁, 10 VSD=9 MSD gives LC=0.01 cm; reading the source figure gives 2.87 cm. For C₂, 10 VSD=11 MSD, so the signed Vernier correction is handled oppositely; the figure gives 2.83 cm. Correct answer: C.