The sum of the numbers \(436.32,227.2,\) and \(0.301\) in the appropriate significant figures is:

1. \( 663.821 \) 2. \( 664 \)
3. \( 663.8 \) 4. \(663.82\)
Subtopic:  Significant Figures |
 66%
From NCERT
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The mass and volume of a body are \(4.237~\mathrm{g}\) and \(2.5~\mathrm{cm^3}\), respectively. The density of the material of the body in correct significant figures will be:
1. \(1.6048~\mathrm{g~cm^{-3}}\)
2. \(1.69~\mathrm{g~cm^{-3}}\)
3. \(1.7~\mathrm{g~cm^{-3}}\)
4. \(1.695~\mathrm{g~cm^{-3}}\)

Subtopic:  Significant Figures |
 84%
From NCERT
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The numbers \(2.745\) and \(2.735\) on rounding off to \(3\) significant figures will give respectively, 

1. \(2.75\) and \(2.74\) 2. \(2.74\) and \(2.73\)
3. \(2.75\) and \(2.73\) 4. \(2.74\) and \(2.74\)
Subtopic:  Significant Figures |
 69%
From NCERT
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The length and breadth of a rectangular sheet are 16.2 cm and 10.1 cm, respectively. The area of the sheet in appropriate significant figures and error would be, respectively,
1. 164 ± 3 cm2
2. 163.62 ± 2.6 cm2 
3. 163.6 ± 2.6 cm2 
4. 163.62 ± 3 cm2

Subtopic:  Errors | Significant Figures |
 61%
From NCERT
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Which of the following pairs of physical quantities does not have the same dimensional formula?

1. work and torque
2. angular momentum and Planck's constant
3. tension and surface tension
4. impulse and linear momentum

Subtopic:  Dimensions |
 73%
From NCERT
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The measure of two quantities along with the precision of respective measuring instrument is A=2.5ms1±0.5ms1B=0.10s±0.01s. The value of AB will be:

1. (0.25 ± 0.08) m

2. (0.25 ± 0.5) m

3. (0.25 ± 0.05) m

4. (0.25 ± 0.135) m

Subtopic:  Errors |
From NCERT
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You measure two quantities as A = 1.0 m ± 0.2 m, B = 2.0 m ± 0.2 m. We should report the correct value for AB as

1. 1.4 m ± 0.4 m

2. 1.41 m ± 0.15 m

3. 1.4 m ± 0.3 m

4. 1.4 m ± 0.2 m

Subtopic:  Errors |
From NCERT
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Which of the following measurement is most precise?
1. \(5.00\) mm
2. \(5.00\) cm
3. \(5.00\) m
4. \(5.00\) km

Subtopic:  Errors |
 83%
From NCERT
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The mean length of an object is 5 cm. Which of the following measurements is most accurate?
1. 4.9 cm
2. 4.805 cm
3. 5.25 cm
4. 5.4 cm

Subtopic:  Errors |
 80%
From NCERT
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Young's modulus of steel is \(1.9 \times 10^{11} \mathrm{~N} / \mathrm{m}^2\). When expressed in CGS units of \(\mathrm{dyne/cm^2}\), it will be equal to: \((1 \mathrm{~N}=10^5 \text { dyne, } 1 \mathrm{~m}^2=10^4 \mathrm{~cm}^2)\)
1. \( 1.9 \times 10^{10} \)
2. \( 1.9 \times 10^{11} \)
3. \( 1.9 \times 10^{12} \)
4. \( 1.9 \times 10^9\)

Subtopic:  Dimensions |
 73%
From NCERT
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