Finding Significant Figures

Q.

What Is The Least Count Of Meter Rod?

Q. A force is equal to $85.75\text{dyne}$. If it is expressed in $\text{Newton}$, then the number of significant figures will be

1. $6$
2. $5$
3. $3$
4. $4$

Q. State the number of significant figures in the following
a. $0.006{\text{m}}^2$
b. $2.65\times {10}^3\text{kg}$
c. $0.2309{\text{m}}^{-3}$
d. $6.320\text{J}$
e. $0.006032{\text{m}}^2$

1. (a) - 1 ; (b) - 3 ; (c) - 4 ; (d) - 4 ; (e) - 6
2. (a) - 1 ; (b) - 3 ; (c) - 4 ; (d) - 3 ; (e) - 4
3. (a) - 1 ; (b) - 3 ; (c) - 4 ; (d) - 4 ; (e) - 4
4. (a) - 1 ; (b) - 3 ; (c) - 4 ; (d) - 3 ; (e) - 6

Q. Pitch of a screw gauge is 1 mm and there are 50 divisions on circular scale. When screw gauge is completely closed ${28}^{th}$ division of circular scale coincides with reference line. When a sheet is placed in it, the linear scale reads 2 divisions and circular scale reads 16 divisions. Zero of linear scale is visible when screw gauge is completely closed. Thickness of the sheet is:

1. 32 mm
2. 2.88 mm
3. 1.76 mm
4. 2.12 mm

Q. How many significant figures are there in $0.310\times {10}^5\text{m}$ ?

1. $2$
2. $3$
3. $4$
4. $5$

Q. State the number of significant figures in the following
a. $0.006{\text{m}}^2$
b. $2.65\times {10}^3\text{kg}$
c. $0.2309{\text{m}}^{-3}$
d. $6.320\text{J}$
e. $0.006032{\text{m}}^2$

1. (a) - 1 ; (b) - 3 ; (c) - 4 ; (d) - 4 ; (e) - 6
2. (a) - 1 ; (b) - 3 ; (c) - 4 ; (d) - 3 ; (e) - 4
3. (a) - 1 ; (b) - 3 ; (c) - 4 ; (d) - 4 ; (e) - 4
4. (a) - 1 ; (b) - 3 ; (c) - 4 ; (d) - 3 ; (e) - 6