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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyYoung'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. \( 1.9 \times 10^9\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. | \( {\left[{pA}^{-1} {~T}^1\right]} \) | 2. | \( {\left[{p}^2 {AT}\right]} \) |
3. | \( {\left[{pA}^{-1 / 2} {~T}\right]} \) | 4. | \( {\left[{pA}^{1 / 2} {~T}^{-1}\right]}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyOn 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) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIF \(P, Q\) and \(R\) are physical quantities, having different dimensions, which of the following combination/s can never be a meaningful quantity?
(a) \((P – Q)/R\)
(b) \(PQ – R\)
(c) \(PQ /R\)
(d) \((PR – Q^2)/R\)
(e) \((R + Q)/P\)
Choose the correct option:
1. (a), (e)
2. (a), (d), (e)
3. (a), (c), (d)
4. (b), (d)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPhoton is a quantum of radiation with energy E = h, where is the frequency
and h is Planck's constant. The dimensions of h are the same as that of the following quantities.
(a) linear impulse
(b) angular impulse
(c) linear momentum
(d) angular momentum
Choose the correct option:
1. (a, d)
2. (b, d)
3. (c, d)
4. (a, b)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf Planck's constant (\(h\)) and speed of light in a vacuum (\(c\)) are taken as two fundamental quantities, which one of the following can, in addition, be taken to express length, mass and time in terms of the three chosen fundamental quantities?
(a) | mass of electron (\(m_e\)) |
(b) | universal gravitational constant (\(G\)) |
(c) | charge of electron (\(e\)) |
(d) | mass of proton (\(m_p\)) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following ratios, express pressure?
(a) | force/area |
(b) | energy/volume |
(c) | energy/area |
(d) | force/volume |
Choose the correct option:
1. | (a), (c) |
2. | (a), (d) |
3. | (b), (d) |
4. | (a), (b) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe following is/are not a unit of time:
(a) | second |
(b) | parsec |
(c) | year |
(d) | light year |
Choose the correct option:
1. | (a, c, d) |
2. | (a, c) |
3. | (b, d) |
4. | (b, c) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology