Select Chapter Topics:

The angle of $$1'$$ (minute of an arc) in radian is nearly equal to: 1. $$2.91 \times 10^{-4} ~\mathrm{rad}$$ 2. $$4.85 \times 10^{-4} ~\mathrm{rad}$$ 3. $$4.80 \times 10^{-6} ~\mathrm{rad}$$ 4. $$1.75 \times 10^{-2} ~\mathrm{rad}$$

Subtopic: Â Measurement & Measuring Devices |
Â 53%
From NCERT
NEET - 2020
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The angle of $$1^\circ$$ (degree) will be equal to:
(Use $$360^\circ=2\pi$$ rad
)
1. $$1.034\times10^{-3}$$ rad
2. $$1.745\times10^{-2}$$ rad
3. $$1.524\times10^{-2}$$ rad
4. $$1.745\times10^{3}$$ rad

Subtopic: Â Measurement & Measuring Devices |
Â 73%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Each side of a cube is measured to be $$7.203~\text{m}$$. What are the total surface area and the volume respectively of the cube to appropriate significant figures?

 1 $$373.7~\text{m}^2$$ and $$311.3~\text{m}^3$$ 2 $$311.3~\text{m}^2$$ and $$373.7~\text{m}^3$$ 3 $$311.2992~\text{m}^2$$ and $$373.7147~\text{m}^3$$ 4 $$373.7147~\mathrm{m^2}$$ and $$311.2992~\text{m}^3$$
Subtopic: Â Significant Figures |
Â 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

On the basis of dimensions, decide which of the following relations for the displacement of a particle undergoing simple harmonic motion is/are not correct.

 (a) $$y = a\sin \left(2\pi t / T\right)$$ (b) $$y = a\sin(vt)$$ (c) $$y = \left({\dfrac a T}\right) \sin \left({\dfrac t a}\right)$$ (d) $$y = a \sqrt 2 \left(\sin \left({\dfrac {2 \pi t} T}\right) - \cos \left({\dfrac {2 \pi t} T}\right)\right)$$

(Symbols have their usual meanings.)
Choose the correct option:

 1 (a), (c) 2 (a), (b) 3 (b), (c) 4 (a), (d)

Subtopic: Â Dimensions |
Â 63%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

If momentum ($${p}$$), area ($${A}$$), and time ($${T}$$) are taken to be fundamental quantities, then energy has the dimensional formula:
 1 $${\left[{pA}^{-1} {~T}^1\right]}$$ 2 $${\left[{p}^2 {AT}\right]}$$ 3 $${\left[{pA}^{-1 / 2} {~T}\right]}$$ 4 $${\left[{pA}^{1 / 2} {~T}^{-1}\right]}$$
Subtopic: Â Dimensions |
Â 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Young's modulus of steel is $$1.9 \times 10^{11} ~\text{N/m}^2$$. When expressed in CGS units of $$\text{dyne/cm}^2$$, it will be equal to: $$(1 \mathrm{~N}=10^5 \text { dyne, } 1~ \text{m}^2=10^4 ~\text{cm}^2)$$
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: Â Dimensions |
Â 73%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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: Â Significant Figures |
Â 69%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The mass and volume of a body are $$4.237~\text{grams}$$ and $$2.5~\text{cm}^3$$, respectively. The density of the material of the body in correct significant figures will be:
1. $$1.6048~\text{grams cm}^{-3}$$
2. $$1.69~\text{grams cm}^{-3}$$
3. $$1.7~\text{grams cm}^{-3}$$
4. $$1.695~\text{grams cm}^{-3}$$

Subtopic: Â Significant Figures |
Â 84%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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: Â Significant Figures |
Â 66%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A physical quantity is measured and the result is expressed as $$nu$$ where $$u$$ is the unit used and $$n$$ is the numerical value. If the result is expressed in various units then:
1. $$n\propto \mathrm{size~of}~u$$
2. $$n\propto u^2$$
3. $$n\propto \sqrt u$$
4. $$n\propto \frac{1}{u}$$

Subtopic: Â Dimensions |
Â 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Select Chapter Topics: