The circular main scale of a spectrometer is divided in to degrees and `30` divisions on the vernier scale occupy the same arc length as `29` divisions of the main scale. The angle of minimum deviation in a prism measured with this spectrometer is found to be `30°`. The probable percentage error in the measurement is nearly A) 0.3% B) 1/9 % C) 1 % D) 0.2 %

The length of a cyclinder is measured as 5 cm using a vernier calipers of least count 0.1 mm. The percentage error in the measured length is nearly

1 cm of main scale of a vernier callipers is divided into 10 divisions. The least count of the callipers is 0.05 cm , then the varnier scale must have

You are given two different vernier callipers A and B haiving 10 divisions on vernier scale that coincide with 9 divisions on the main scale each. If 1 cm of main scale A is divided into 10 parts and that of B in 20 parts, then least count of A and B are

1 cm of main scale of a vernier callipers is divided into 10 divisions. The least count of the callipers is 0.005 cm , then the vernier scale must have.

A vernier scale has 10 divisions . It slides over a main scale whose pitch is 1.0 mm . If the number of division on the main scale , to the left- hand side of zero of the vernier scale is 4 and the 8th vernier scale division coincides with the main scale find the measurement.

The vernier of a circular scale is divided into 30 divisons, which coincides with 29 main scale divisions. If each main scale division is (1//2)^@ the least count of the instrument is (1^@=60')

The length of an object is measured using a vernier system whose main scale is 30 cm long with 600 divisions. If 19 divisions of the main scale coincide with 20 divisions of the vernier scale, then its least count is

The least count of the main scale of vernier callipers is 1 mm. Its vernier scale is divided into 10 divisions and coincide with 9 division of the main scale. When jaws are touching each other, the 7^(th) division of main scale and zero of main scale. When this vernier is used to measure lenght of a cylinder the zero of the vernier scales between 3.1 cm and 3.2 cm and 4^(th) VSD coincider with a main scale division . The lehgth of the cylinder is : (VSD is vernier scale division)

The least count of vernier callipers is 0.1 mm . The main scale reading before the zero of the vernier scale is 10 and the zeroth division of the vernier scale coincides with the main scale division. Given that each main scale division is 1mm . The measured value should be expressed as