NEET Exam MCQs
Physics: Units and Measurements
Physics: Units and Measurements 19 Questions
1 / 19
In a particular system, the unit of length, mass and time are chosen to be 10 cm, 10 g and 0.1 s respectively. The unit of force in this system will be equivalent to
2 / 19
A screw gauge gives the following readings when used to measure the diameter of a wire Main scale reading : 0 mm Circular scale reading : 52 divisions Given that, 1 mm on main scale corresponds to 100 divisions on the circular scale. The diameter of the wire from the above data is
3 / 19
Time intervals measured by a clock give the following readings 1.25 s, 1.24 s, 1.27 s, 1.21 s and 1.28 s. What is the percentage relative error of the observations?
4 / 19
A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale.The pitch of the screw gauge is
5 / 19
Taking into account of the significant figures, what is the value of 9.99 m − 0.0099 m?
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A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of −0 004. cm, the correct diameter of the ball is
7 / 19
If the error in the measurement of radius of a sphere is 2%, then the error in the determination of volume of the sphere will be
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The density of a cube is measured by measuring its mass and length of its sides. If the maximum error in the measurement of mass and length are 4% and 3% respectively, the maximum error in the measurement of density will be
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The percentage errors in the measurement of mass and speed are 2% and 3% respectively. The error in kinetic energy obtained by measuring mass and speed, will be
10 / 19
In a vernier callipers N divisions of vernier scale coincide with N − 1 divisions of main scale (in which length of one division is 1 mm). The least count of the instrument should be
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A certain body weighs 22.42 g and has a measured volume of 4.7 cc. The possible error in the measurement of mass and volume are 0.01 g and 0.1 cc. Then, maximum error in the density will be
12 / 19
If the dimensions of a physical quantity are given by[Ma Lb Tc], then the physical quantity will be
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"Which two of the following five physical parameters have the same dimensions? (i) Energy density (ii) Refractive index (iii) Dielectric constant (iv) Young’s modulus (v) Magnetic field"
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The ratio of the dimensions of Planck’s constant and that of the moment of inertia is the dimension of
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Planck’s constant has the dimensions of
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A pair of physical quantities having same dimensional formula is
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Which of the following will have the dimensions of time ?
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Which of the following is a dimensional constant ?
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Of the following quantities, which one has dimensions different from the remaining three?
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