266410
A length is measured as 2500 m by a meter scale. Which of the following statement is correct :
1 number of significant figure in given data is 2 only
2 number of significant figure in given data is 2 and it should be written as 2.5 km
3 number of significant figure in given data is 4 but it should be written as \(2.500 \times 10^3 \mathrm{~m}\)
4 number of significant figure in given data is 4 at all
Explanation:
c All measured ditigits are significant but they should be written according to rules of significant figures. \(\Rightarrow 2500 \mathrm{~m}\) has 4 significant figure but it is written in wrong way \(\Rightarrow 2.500 \times 10^3 \mathrm{~m}\) has 4 significant figure and it is written in right way. 3.\(\mathrm{XeF}_4\) - (i) Squire planer. (c) \(90^{\circ}\)
**NCERT-XI-I-3**
TEST SERIES (PHYSICS FST)
266411
In a plane progressive wave given by: \(y=25 \cos (2 \pi t-\pi x)\) the amplitude and frequency are respectively:
266412
A hole of radius \(R / 2\) is cut from a thin circular plate of radius R and mass M . The moment of inertia of the plate about an axis through \(O\) perpendicular to the X-Y plane (i.e., about the \(\mathbf{Z}\)-axis ) is:
1 \(\frac{5}{7} M R^2\)
2 \(\frac{7}{12} M R^2\)
3 \(\frac{13}{32} M R^2\)
4 \(\frac{13}{24} M^2\)
Explanation:
c \[ \begin{aligned} & I_{\text {pte }}=\frac{1}{2} M R^2-\left(\frac{1}{2} \frac{M}{4}\left(\frac{R}{2}\right)^2+\frac{M}{4}\left(\frac{M}{2}\right)^2\right) \\ & =\frac{1}{2} M R^2-\left[\frac{M R^2}{16}\left(\frac{1}{2}+1\right)\right] \\ & =\frac{13 M R^2}{32} \end{aligned} \] 5.6 lit gas ---- Mgm
**NCERT-XI-I-118**
TEST SERIES (PHYSICS FST)
266413
Arod is of length 3 m and its mass acting per unit length is directly proportional to distance \(x\)-from its one end. The centre of gravity of the rod from that end will be at:
1 1.5 m
2 2.0 m
3 2.5 m
4 3.0 m
Explanation:
b \[ \bar{x}=\frac{\int_0^3 x d m}{\int_0^3 d m}=2 \quad \therefore \quad \frac{d m}{d x}=k x \]
266410
A length is measured as 2500 m by a meter scale. Which of the following statement is correct :
1 number of significant figure in given data is 2 only
2 number of significant figure in given data is 2 and it should be written as 2.5 km
3 number of significant figure in given data is 4 but it should be written as \(2.500 \times 10^3 \mathrm{~m}\)
4 number of significant figure in given data is 4 at all
Explanation:
c All measured ditigits are significant but they should be written according to rules of significant figures. \(\Rightarrow 2500 \mathrm{~m}\) has 4 significant figure but it is written in wrong way \(\Rightarrow 2.500 \times 10^3 \mathrm{~m}\) has 4 significant figure and it is written in right way. 3.\(\mathrm{XeF}_4\) - (i) Squire planer. (c) \(90^{\circ}\)
**NCERT-XI-I-3**
TEST SERIES (PHYSICS FST)
266411
In a plane progressive wave given by: \(y=25 \cos (2 \pi t-\pi x)\) the amplitude and frequency are respectively:
266412
A hole of radius \(R / 2\) is cut from a thin circular plate of radius R and mass M . The moment of inertia of the plate about an axis through \(O\) perpendicular to the X-Y plane (i.e., about the \(\mathbf{Z}\)-axis ) is:
1 \(\frac{5}{7} M R^2\)
2 \(\frac{7}{12} M R^2\)
3 \(\frac{13}{32} M R^2\)
4 \(\frac{13}{24} M^2\)
Explanation:
c \[ \begin{aligned} & I_{\text {pte }}=\frac{1}{2} M R^2-\left(\frac{1}{2} \frac{M}{4}\left(\frac{R}{2}\right)^2+\frac{M}{4}\left(\frac{M}{2}\right)^2\right) \\ & =\frac{1}{2} M R^2-\left[\frac{M R^2}{16}\left(\frac{1}{2}+1\right)\right] \\ & =\frac{13 M R^2}{32} \end{aligned} \] 5.6 lit gas ---- Mgm
**NCERT-XI-I-118**
TEST SERIES (PHYSICS FST)
266413
Arod is of length 3 m and its mass acting per unit length is directly proportional to distance \(x\)-from its one end. The centre of gravity of the rod from that end will be at:
1 1.5 m
2 2.0 m
3 2.5 m
4 3.0 m
Explanation:
b \[ \bar{x}=\frac{\int_0^3 x d m}{\int_0^3 d m}=2 \quad \therefore \quad \frac{d m}{d x}=k x \]
266410
A length is measured as 2500 m by a meter scale. Which of the following statement is correct :
1 number of significant figure in given data is 2 only
2 number of significant figure in given data is 2 and it should be written as 2.5 km
3 number of significant figure in given data is 4 but it should be written as \(2.500 \times 10^3 \mathrm{~m}\)
4 number of significant figure in given data is 4 at all
Explanation:
c All measured ditigits are significant but they should be written according to rules of significant figures. \(\Rightarrow 2500 \mathrm{~m}\) has 4 significant figure but it is written in wrong way \(\Rightarrow 2.500 \times 10^3 \mathrm{~m}\) has 4 significant figure and it is written in right way. 3.\(\mathrm{XeF}_4\) - (i) Squire planer. (c) \(90^{\circ}\)
**NCERT-XI-I-3**
TEST SERIES (PHYSICS FST)
266411
In a plane progressive wave given by: \(y=25 \cos (2 \pi t-\pi x)\) the amplitude and frequency are respectively:
266412
A hole of radius \(R / 2\) is cut from a thin circular plate of radius R and mass M . The moment of inertia of the plate about an axis through \(O\) perpendicular to the X-Y plane (i.e., about the \(\mathbf{Z}\)-axis ) is:
1 \(\frac{5}{7} M R^2\)
2 \(\frac{7}{12} M R^2\)
3 \(\frac{13}{32} M R^2\)
4 \(\frac{13}{24} M^2\)
Explanation:
c \[ \begin{aligned} & I_{\text {pte }}=\frac{1}{2} M R^2-\left(\frac{1}{2} \frac{M}{4}\left(\frac{R}{2}\right)^2+\frac{M}{4}\left(\frac{M}{2}\right)^2\right) \\ & =\frac{1}{2} M R^2-\left[\frac{M R^2}{16}\left(\frac{1}{2}+1\right)\right] \\ & =\frac{13 M R^2}{32} \end{aligned} \] 5.6 lit gas ---- Mgm
**NCERT-XI-I-118**
TEST SERIES (PHYSICS FST)
266413
Arod is of length 3 m and its mass acting per unit length is directly proportional to distance \(x\)-from its one end. The centre of gravity of the rod from that end will be at:
1 1.5 m
2 2.0 m
3 2.5 m
4 3.0 m
Explanation:
b \[ \bar{x}=\frac{\int_0^3 x d m}{\int_0^3 d m}=2 \quad \therefore \quad \frac{d m}{d x}=k x \]
266410
A length is measured as 2500 m by a meter scale. Which of the following statement is correct :
1 number of significant figure in given data is 2 only
2 number of significant figure in given data is 2 and it should be written as 2.5 km
3 number of significant figure in given data is 4 but it should be written as \(2.500 \times 10^3 \mathrm{~m}\)
4 number of significant figure in given data is 4 at all
Explanation:
c All measured ditigits are significant but they should be written according to rules of significant figures. \(\Rightarrow 2500 \mathrm{~m}\) has 4 significant figure but it is written in wrong way \(\Rightarrow 2.500 \times 10^3 \mathrm{~m}\) has 4 significant figure and it is written in right way. 3.\(\mathrm{XeF}_4\) - (i) Squire planer. (c) \(90^{\circ}\)
**NCERT-XI-I-3**
TEST SERIES (PHYSICS FST)
266411
In a plane progressive wave given by: \(y=25 \cos (2 \pi t-\pi x)\) the amplitude and frequency are respectively:
266412
A hole of radius \(R / 2\) is cut from a thin circular plate of radius R and mass M . The moment of inertia of the plate about an axis through \(O\) perpendicular to the X-Y plane (i.e., about the \(\mathbf{Z}\)-axis ) is:
1 \(\frac{5}{7} M R^2\)
2 \(\frac{7}{12} M R^2\)
3 \(\frac{13}{32} M R^2\)
4 \(\frac{13}{24} M^2\)
Explanation:
c \[ \begin{aligned} & I_{\text {pte }}=\frac{1}{2} M R^2-\left(\frac{1}{2} \frac{M}{4}\left(\frac{R}{2}\right)^2+\frac{M}{4}\left(\frac{M}{2}\right)^2\right) \\ & =\frac{1}{2} M R^2-\left[\frac{M R^2}{16}\left(\frac{1}{2}+1\right)\right] \\ & =\frac{13 M R^2}{32} \end{aligned} \] 5.6 lit gas ---- Mgm
**NCERT-XI-I-118**
TEST SERIES (PHYSICS FST)
266413
Arod is of length 3 m and its mass acting per unit length is directly proportional to distance \(x\)-from its one end. The centre of gravity of the rod from that end will be at:
1 1.5 m
2 2.0 m
3 2.5 m
4 3.0 m
Explanation:
b \[ \bar{x}=\frac{\int_0^3 x d m}{\int_0^3 d m}=2 \quad \therefore \quad \frac{d m}{d x}=k x \]
