139946 Assertion: The number of significant figures depends on the least count of measuring instrument.
Reason: Significant figures define the accuracy of measuring instrument.

139953 A screw gauge of pitch \(0.5 \mathrm{~mm}\) is used to measure the diameter of uniform wire of length \(6.8 \mathrm{~cm}\), the main scale reading is \(1.5 \mathrm{~mm}\) and circular scale reading is 7 . The calculated curved surface area of wire to appropriate significant figures is:
[Screw gauge has 50 divisions on the circular scale]

139954 One main scale division of a vernier callipers is a \(\mathrm{cm}\) and \(\mathrm{n}^{\text {th }}\) division of the vernier scale coincide with \((n-1)^{\text {th }}\) division of the main scale. The least count of the callipers (in \(\mathbf{~ m m}\) ) is

139927 Number of significant figures in expression \(\frac{4.327 \mathrm{~g}}{2.51 \mathrm{~cm}^{3}}\) is

139946 Assertion: The number of significant figures depends on the least count of measuring instrument.
Reason: Significant figures define the accuracy of measuring instrument.

139953 A screw gauge of pitch \(0.5 \mathrm{~mm}\) is used to measure the diameter of uniform wire of length \(6.8 \mathrm{~cm}\), the main scale reading is \(1.5 \mathrm{~mm}\) and circular scale reading is 7 . The calculated curved surface area of wire to appropriate significant figures is:
[Screw gauge has 50 divisions on the circular scale]

139954 One main scale division of a vernier callipers is a \(\mathrm{cm}\) and \(\mathrm{n}^{\text {th }}\) division of the vernier scale coincide with \((n-1)^{\text {th }}\) division of the main scale. The least count of the callipers (in \(\mathbf{~ m m}\) ) is

139927 Number of significant figures in expression \(\frac{4.327 \mathrm{~g}}{2.51 \mathrm{~cm}^{3}}\) is

139946 Assertion: The number of significant figures depends on the least count of measuring instrument.
Reason: Significant figures define the accuracy of measuring instrument.

139953 A screw gauge of pitch \(0.5 \mathrm{~mm}\) is used to measure the diameter of uniform wire of length \(6.8 \mathrm{~cm}\), the main scale reading is \(1.5 \mathrm{~mm}\) and circular scale reading is 7 . The calculated curved surface area of wire to appropriate significant figures is:
[Screw gauge has 50 divisions on the circular scale]

139954 One main scale division of a vernier callipers is a \(\mathrm{cm}\) and \(\mathrm{n}^{\text {th }}\) division of the vernier scale coincide with \((n-1)^{\text {th }}\) division of the main scale. The least count of the callipers (in \(\mathbf{~ m m}\) ) is

139927 Number of significant figures in expression \(\frac{4.327 \mathrm{~g}}{2.51 \mathrm{~cm}^{3}}\) is

139946 Assertion: The number of significant figures depends on the least count of measuring instrument.
Reason: Significant figures define the accuracy of measuring instrument.

139953 A screw gauge of pitch \(0.5 \mathrm{~mm}\) is used to measure the diameter of uniform wire of length \(6.8 \mathrm{~cm}\), the main scale reading is \(1.5 \mathrm{~mm}\) and circular scale reading is 7 . The calculated curved surface area of wire to appropriate significant figures is:
[Screw gauge has 50 divisions on the circular scale]

139954 One main scale division of a vernier callipers is a \(\mathrm{cm}\) and \(\mathrm{n}^{\text {th }}\) division of the vernier scale coincide with \((n-1)^{\text {th }}\) division of the main scale. The least count of the callipers (in \(\mathbf{~ m m}\) ) is

139927 Number of significant figures in expression \(\frac{4.327 \mathrm{~g}}{2.51 \mathrm{~cm}^{3}}\) is