139973 The length is measured using a vernier system whose main scale is \(30 \mathrm{~cm}\) long with 600 divisions. If 19 divisions of the main scale coincide with 20 divisions of the vernier scale, then its least count is

139975 A screw gauge with a pitch of \(0.5 \mathrm{~mm}\) and a circular scale with 50 divisions is used to measure the thickness of a thin sheet of aluminum. Before starting the measurement, it is found that when the two jaws of the screw gauge are brought in contact, the \(\mathbf{4 5}^{\text {th }}\) division
coincides with the main scale line and that the zero of the main scale is barely visible.
What is the thickness of the sheet, if the main scale reading is \(0.5 \mathrm{~mm}\) and the \(25^{\text {th }}\) division coincides with the main scale line?

139976 A student measured the length of a rod and wrote it as \(3.50 \mathrm{~cm}\). Which instrument did he use to measure it?

139977 A screw gauge gives the following reading when used to measure the diameter of a wire. Main scale reading \(0 \mathrm{~mm}\) circular scale reading 52 divisions Given that \(1 \mathrm{~mm}\) on main scale corresponds to 100 divisions of the circular scale. The diameter of wire from the above data is

139973 The length is measured using a vernier system whose main scale is \(30 \mathrm{~cm}\) long with 600 divisions. If 19 divisions of the main scale coincide with 20 divisions of the vernier scale, then its least count is

139975 A screw gauge with a pitch of \(0.5 \mathrm{~mm}\) and a circular scale with 50 divisions is used to measure the thickness of a thin sheet of aluminum. Before starting the measurement, it is found that when the two jaws of the screw gauge are brought in contact, the \(\mathbf{4 5}^{\text {th }}\) division
coincides with the main scale line and that the zero of the main scale is barely visible.
What is the thickness of the sheet, if the main scale reading is \(0.5 \mathrm{~mm}\) and the \(25^{\text {th }}\) division coincides with the main scale line?

139976 A student measured the length of a rod and wrote it as \(3.50 \mathrm{~cm}\). Which instrument did he use to measure it?

139977 A screw gauge gives the following reading when used to measure the diameter of a wire. Main scale reading \(0 \mathrm{~mm}\) circular scale reading 52 divisions Given that \(1 \mathrm{~mm}\) on main scale corresponds to 100 divisions of the circular scale. The diameter of wire from the above data is

139973 The length is measured using a vernier system whose main scale is \(30 \mathrm{~cm}\) long with 600 divisions. If 19 divisions of the main scale coincide with 20 divisions of the vernier scale, then its least count is

139975 A screw gauge with a pitch of \(0.5 \mathrm{~mm}\) and a circular scale with 50 divisions is used to measure the thickness of a thin sheet of aluminum. Before starting the measurement, it is found that when the two jaws of the screw gauge are brought in contact, the \(\mathbf{4 5}^{\text {th }}\) division
coincides with the main scale line and that the zero of the main scale is barely visible.
What is the thickness of the sheet, if the main scale reading is \(0.5 \mathrm{~mm}\) and the \(25^{\text {th }}\) division coincides with the main scale line?

139976 A student measured the length of a rod and wrote it as \(3.50 \mathrm{~cm}\). Which instrument did he use to measure it?

139977 A screw gauge gives the following reading when used to measure the diameter of a wire. Main scale reading \(0 \mathrm{~mm}\) circular scale reading 52 divisions Given that \(1 \mathrm{~mm}\) on main scale corresponds to 100 divisions of the circular scale. The diameter of wire from the above data is

139973 The length is measured using a vernier system whose main scale is \(30 \mathrm{~cm}\) long with 600 divisions. If 19 divisions of the main scale coincide with 20 divisions of the vernier scale, then its least count is

139975 A screw gauge with a pitch of \(0.5 \mathrm{~mm}\) and a circular scale with 50 divisions is used to measure the thickness of a thin sheet of aluminum. Before starting the measurement, it is found that when the two jaws of the screw gauge are brought in contact, the \(\mathbf{4 5}^{\text {th }}\) division
coincides with the main scale line and that the zero of the main scale is barely visible.
What is the thickness of the sheet, if the main scale reading is \(0.5 \mathrm{~mm}\) and the \(25^{\text {th }}\) division coincides with the main scale line?

139976 A student measured the length of a rod and wrote it as \(3.50 \mathrm{~cm}\). Which instrument did he use to measure it?

139977 A screw gauge gives the following reading when used to measure the diameter of a wire. Main scale reading \(0 \mathrm{~mm}\) circular scale reading 52 divisions Given that \(1 \mathrm{~mm}\) on main scale corresponds to 100 divisions of the circular scale. The diameter of wire from the above data is