Govt. Exams
Entrance Exams
Acetylene (C₂H₂) is commonly used in oxy-acetylene welding and cutting due to its high flame temperature of about 3,300°C.
Electromagnetic induction is the process where a changing magnetic field produces an electric current, as discovered by Faraday.
According to the Second Law of Thermodynamics, entropy (disorder) of an isolated system always increases over time.
Concave lenses are used to correct myopia by diverging light rays to focus them correctly on the retina.
The Doppler effect describes the change in frequency or wavelength of waves when the source or observer moves relative to each other.
Sand and iron filings form a heterogeneous mixture as their components remain visibly distinct and can be easily separated.
Magnetic brakes provide rapid and controlled stopping. Regenerative brakes are energy-efficient but slower. Air/hydraulic are conventional systems.
Kepler's Laws of Planetary Motion describe how planets orbit the sun in elliptical paths with the sun at one focus.
Oxygen is the most abundant element in Earth's crust, comprising about 46% of its composition.
Refraction is the bending of light when it passes from one transparent medium to another with different optical density.
