05. Measuring Instruments
Units and Measurements

139979 In a vernier callipers \(\mathbf{N}\) divisions of vernier scale coincide with \(\mathbf{N}-\mathbf{1}\) divisions of main scale (in which length of one division is \(1 \mathrm{~mm}\) ). The least count of the instrument should be

1 \(\mathrm{N}\)
2 \(\mathrm{N}-1\)
3 \(\frac{1}{10 \mathrm{~N}}\)
4 \(\frac{1}{(\mathrm{~N}-1)}\)
Units and Measurements

139980 In an experiment, the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half a degree (= \(0.5^{\circ}\) ), then the least count of the instrument is

1 one minute
2 half minute
3 one degree
4 half degree
Units and Measurements

139981 A spectrometer gives the following reading when used to measure the angle of a prism. Main scale reading : \(\mathbf{5 8 . 5}\) degree Vernier scale reading : 09 divisions. Given that 1 division on main scale corresponds to 0.5 degree. Total divisions on the vernier scale is 30 and match with 29 divisions of the main scale. The angle of the prism from the above data is

1 58.59 degree
2 58.77 degree
3 58.65 degree
4 59 degree
Units and Measurements

139982 A student measured the length of a rod and wrote it as \(3.50 \mathrm{~cm}\). Which instrument did he use to measure it?

1 A meter scale
2 A vernier calliper where the 10 divisions in vernier scale matches with 9 divisions in main scale and main scale has 10 divisions in \(1 \mathrm{~cm}\)
3 A screw gauge having 100 divisions in the circular scale and pitch as \(1 \mathrm{~mm}\)
4 A screw gauge having 50 divisions in the circular scale and pitch as \(1 \mathrm{~mm}\)
Units and Measurements

139979 In a vernier callipers \(\mathbf{N}\) divisions of vernier scale coincide with \(\mathbf{N}-\mathbf{1}\) divisions of main scale (in which length of one division is \(1 \mathrm{~mm}\) ). The least count of the instrument should be

1 \(\mathrm{N}\)
2 \(\mathrm{N}-1\)
3 \(\frac{1}{10 \mathrm{~N}}\)
4 \(\frac{1}{(\mathrm{~N}-1)}\)
Units and Measurements

139980 In an experiment, the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half a degree (= \(0.5^{\circ}\) ), then the least count of the instrument is

1 one minute
2 half minute
3 one degree
4 half degree
Units and Measurements

139981 A spectrometer gives the following reading when used to measure the angle of a prism. Main scale reading : \(\mathbf{5 8 . 5}\) degree Vernier scale reading : 09 divisions. Given that 1 division on main scale corresponds to 0.5 degree. Total divisions on the vernier scale is 30 and match with 29 divisions of the main scale. The angle of the prism from the above data is

1 58.59 degree
2 58.77 degree
3 58.65 degree
4 59 degree
Units and Measurements

139982 A student measured the length of a rod and wrote it as \(3.50 \mathrm{~cm}\). Which instrument did he use to measure it?

1 A meter scale
2 A vernier calliper where the 10 divisions in vernier scale matches with 9 divisions in main scale and main scale has 10 divisions in \(1 \mathrm{~cm}\)
3 A screw gauge having 100 divisions in the circular scale and pitch as \(1 \mathrm{~mm}\)
4 A screw gauge having 50 divisions in the circular scale and pitch as \(1 \mathrm{~mm}\)
Units and Measurements

139979 In a vernier callipers \(\mathbf{N}\) divisions of vernier scale coincide with \(\mathbf{N}-\mathbf{1}\) divisions of main scale (in which length of one division is \(1 \mathrm{~mm}\) ). The least count of the instrument should be

1 \(\mathrm{N}\)
2 \(\mathrm{N}-1\)
3 \(\frac{1}{10 \mathrm{~N}}\)
4 \(\frac{1}{(\mathrm{~N}-1)}\)
Units and Measurements

139980 In an experiment, the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half a degree (= \(0.5^{\circ}\) ), then the least count of the instrument is

1 one minute
2 half minute
3 one degree
4 half degree
Units and Measurements

139981 A spectrometer gives the following reading when used to measure the angle of a prism. Main scale reading : \(\mathbf{5 8 . 5}\) degree Vernier scale reading : 09 divisions. Given that 1 division on main scale corresponds to 0.5 degree. Total divisions on the vernier scale is 30 and match with 29 divisions of the main scale. The angle of the prism from the above data is

1 58.59 degree
2 58.77 degree
3 58.65 degree
4 59 degree
Units and Measurements

139982 A student measured the length of a rod and wrote it as \(3.50 \mathrm{~cm}\). Which instrument did he use to measure it?

1 A meter scale
2 A vernier calliper where the 10 divisions in vernier scale matches with 9 divisions in main scale and main scale has 10 divisions in \(1 \mathrm{~cm}\)
3 A screw gauge having 100 divisions in the circular scale and pitch as \(1 \mathrm{~mm}\)
4 A screw gauge having 50 divisions in the circular scale and pitch as \(1 \mathrm{~mm}\)
Units and Measurements

139979 In a vernier callipers \(\mathbf{N}\) divisions of vernier scale coincide with \(\mathbf{N}-\mathbf{1}\) divisions of main scale (in which length of one division is \(1 \mathrm{~mm}\) ). The least count of the instrument should be

1 \(\mathrm{N}\)
2 \(\mathrm{N}-1\)
3 \(\frac{1}{10 \mathrm{~N}}\)
4 \(\frac{1}{(\mathrm{~N}-1)}\)
Units and Measurements

139980 In an experiment, the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half a degree (= \(0.5^{\circ}\) ), then the least count of the instrument is

1 one minute
2 half minute
3 one degree
4 half degree
Units and Measurements

139981 A spectrometer gives the following reading when used to measure the angle of a prism. Main scale reading : \(\mathbf{5 8 . 5}\) degree Vernier scale reading : 09 divisions. Given that 1 division on main scale corresponds to 0.5 degree. Total divisions on the vernier scale is 30 and match with 29 divisions of the main scale. The angle of the prism from the above data is

1 58.59 degree
2 58.77 degree
3 58.65 degree
4 59 degree
Units and Measurements

139982 A student measured the length of a rod and wrote it as \(3.50 \mathrm{~cm}\). Which instrument did he use to measure it?

1 A meter scale
2 A vernier calliper where the 10 divisions in vernier scale matches with 9 divisions in main scale and main scale has 10 divisions in \(1 \mathrm{~cm}\)
3 A screw gauge having 100 divisions in the circular scale and pitch as \(1 \mathrm{~mm}\)
4 A screw gauge having 50 divisions in the circular scale and pitch as \(1 \mathrm{~mm}\)