Physics MCQs for NEET — Practice Questions with Answers

$ y_1 = A sin (kx + \omega t) $ $ y_r = A sin ( kx -\omega t ) \Rightarrow y = yi + yr $ $ \therefore y = 2 A sin kx cos \omega t $ Here $ 2A = 10 , \therefore A = 5 $

The given equation represents a stationary wave, which is of the form $ y = 2A ext{sin}(kx) ext{cos}( ext{wt}) $. For a stationary wave, the distance between two consecutive nodes is given by $ rac{ ext{wavelength}}{2} $. Here, $ k = rac{ ext{Ï€}}{4} $, so $ ext{wavelength} = rac{2 ext{Ï€}}{k} = rac{2 ext{Ï€}}{ ext{Ï€}/4} = 8 ext{cm} $. Hence, the separation between consecutive nodes is $ rac{8}{2} = 4 ext{cm} $.

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.

The word 'Physics' is derived from the Greek word 'physikē,' meaning nature. The term was used by ancient Greek philosophers to describe the study of nature and natural phenomena.

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.

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.

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.

The full name of LHC is the Large Hadron Collider. It is the world's largest and highest-energy particle collider, located at CERN. It is used to study particle physics by colliding hadrons, such as protons, at very high speeds. NEET students should remember that 'Hadron' refers to the particles being collided in this context, making 'Large Hadron Collider' the correct answer.