Past Year (2019 onward - NTA Papers) MCQs Units and Measurement Physics NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

The quantities which have the same dimensions as those of solid angle are:
1. stress and angle
2. strain and arc
3. angular speed and stress
4. strain and angle

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In a vernier callipers, \((N+1)\) divisions of the vernier scale coincide with \(N\) divisions of the main scale. If \(1\) \(\text{MSD}\) represents \(0.1~\text{mm}\), the vernier constant (in \(\text{cm}\)) is:

1.	\(\dfrac{1}{100(N+1)} \)	2.	\(100N\)
3.	\(10(N+1) \)	4.	\(\dfrac{1}{10 N}\)

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A force defined by; \(F = \alpha t^2 + \beta t\) acts on a particle at a given time \(t.\) The factor which is dimensionless, if \(\alpha\) and \(\beta\) are constants, is:

1.	\(\alpha t / \beta \)	2.	\(\alpha \beta t \)
3.	\(\alpha \beta / t \)	4.	\(\beta t / \alpha\)

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The percentage errors in the measurement of mass and momentum of an object are \(1\%\) and \(2\%\) respectively. The percentage error in the measurement of kinetic energy of the object is:
1. \(1\%\)
2. \(3\%\)
3. \(4\%\)
4. \(5\%\)

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Match List- I with List- II.

	List-I (Measured values)		List-II (Significant figures)
A	\(0.001213\)	I	\(2\)
B	\(2.1 \times 10^{16} \)	II	\(3\)
C	\(3.70\)	III	\(1\)
D	\(3000\)	IV	\(4\)

Choose the correct answer from the options given below:

1.	A-III, B-II, C-I, D-IV
2.	A-III, B-I, CII, D-IV
3.	A-I, B-II, C-IV, D-III
4.	A-IV, B-I, C-II, D-III

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A vernier calipers has \(1~\text{mm}\) marks on the main scale. It has \(20\) equal divisions on the vernier scale which match with \(16\) main scale divisions. The least count of this vernier calipers is:
1. \(0.02~\text{mm}\)
2. \(0.05~\text{mm}\)
3. \(0.10~\text{mm}\)
4. \(0.20~\text{mm}\)

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A metal wire has mass \((0.4\pm 0.002)~\mathrm{g}\), radius \((0.3\pm 0.001)~\mathrm{mm}\) and length \((5\pm 0.02)~\mathrm{cm}\). The maximum possible percentage error in the measurement of density will nearly be:
1. \(1.4 \%\)
2. \(1.2 \%\)
3. \(1.3 \%\)
4. \(1.6 \%\)

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The errors in the measurement which arise due to unpredictable fluctuations in temperature and voltage supply are:
1. Random errors
2. Instrumental errors
3. Personal errors
4. Least count errors

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The diameter of a spherical bob, when measured with vernier callipers yielded the values: \(3.33\) cm, \(3.32\) cm, \(3.34\) cm, \(3.33\) cm and \(3.32\) cm. The mean diameter to appropriate significant figures is:
1. \(3.328\) cm
2. \(3.3\) cm
3. \(3.33\) cm
4. \(3.32\) cm

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The mechanical quantity, which has dimensions of reciprocal of mass \((M^{-1}),\) is:

1.	angular momentum
2.	coefficient of thermal conductivity
3.	torque
4.	gravitational constant

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