NEET Physics Questions: Measurement

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What is the least count of the vernier callipers ?




If main scale division = M and vernier scale division = V 9M = 10 V (10-1) M = 10V 10M - M = 10V 10 (M - V)= M, M,(M-V) = M/10 = least count.
What is the least count of commonly available vernier ?




Least count = M /n = 1mm/10 = 0.1 mm = 0.01cm
When the zero mark on the vernier scale lies towards the left side of the zero mark of the main scale, when the jaws are connect, then what will be the zero error ?




Here zero error is positive, so zero. correction is negative, as zero correction = - (zero error)
When the zero mark on the vernier scale lies towards the right side of the zero mark of the main scale, when the jaws are in contact, then what will be the zero error ?




Here zero error is negative, so zero correction is positive.
If observed reading is OR, corrected reading is CR, zero error in ZE and zero correction in ZC, then what will be the possibility ?




Corrected reading = Observed reading - zero error $ \Rightarrow CR = OR - ZE $ $ \Rightarrow CR = OR + ZC $ $ \Rightarrow ZC = CR - OR $
When the jaws of a standard vernier are together, the 6th vernier scale division coincides withthe 6th main scale division, then what in the zero error ?




vernier divisions are smaller then the main scale dividions (9M = 10V), the zero of the vernier must be on the right side of the zero of the main scale. Here zero error is positive.$ \Rightarrow Zero error = 6M -6V = 6(M_V ) = 6 (0.1 mm) = +0.6 mm $
When the jaws of a standard vernier are together, the 6th main scale division coincides with the 7th vernier scale division, then what is the zero error ?




Zero erroe = 6M -7V = (7M -&V) -M = 7 (0.1 mm ) - 1mm = -0.3 mm
In an anusualvernier, 9 vernier scale divisions coincide with 8 main scale division, then what is the least count of the vernier ?




8M = 9V \Rightarrow 9M - M = V 9(M-V) = M or (M -V ) = M/ 9 = 1 /9 mm
In an unsual vernier, 10 vernier scale divisions, coinside with 8 main scale divisions, thenwhat isthe least count of the vernier ?




$ 8M = 10V \Rightarrow 10M -2M = 10V , 10(M-V) = 2M (M -V ) = 2M /10 = 0.2 mm$
Physics is one of the basic disciplines in the category of.......... sciences.




Physics is categorized as a natural science because it involves the study of the natural world and the laws that govern it. Natural sciences include fields such as physics, chemistry, biology, and earth sciences.
β€˜Physics’ comes from a ............... word meaning nature




The word 'Physics' is derived from the Greek word 'physikΔ“,' meaning nature. The term was used by ancient Greek philosophers to describe the study of nature and natural phenomena.
The scope for ratio of length is in order to ...............




No explanation available.

The range of time scale is about





The range of time scales in physics and cosmology can span from extremely small fractions of a second, such as those involved in particle physics, to extremely long durations, such as the age of the universe. The given range $10^{-22}$ seconds to $10^{18}$ seconds covers this broad spectrum, from the smallest measurable quantities to timescales associated with cosmic events.
Birth, evolution and death of stars etc. are studied in branch of physics known as




Astrophysics is the branch of physics that deals with the study of the birth, evolution, and death of stars, as well as other celestial phenomena. It combines the principles of physics and astronomy to understand how the universe behaves on a large scale. NEET students should remember that 'Astro' refers to stars or celestial objects, making 'Astrophysics' the correct answer.
............... is a branch of physics in which heat engine and refrigeratior efficiency is studied




Thermodynamics is the branch of physics that deals with the study of heat and temperature and their relation to energy and work. This includes the efficiency of heat engines and refrigerators. NEET students should remember that 'Thermo' relates to heat, making 'Thermodynamics' the correct answer.