Answer: 0.005 cm

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Questions

1
There are 20 divisions in 4 cm of the main scale. The vernier scale has 10 divisions. The least count of the instrument is

Answer: 0.005 cm

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3
The equation of state of some gases can be expressed as Vander wal equation i.e.
(P + a/v2)(V – b) = RT
Where P is the pressure, V is the volume, T is the absolute temperature and a, b, R are
constants. The dimensions of ‘a’ are:

Answer: [M1L5T-2]

8
The surface tension of a liquid is 70 dyne/cm. In MKS system its value is?

Answer: 7 ✕ 10-2 N/m