Entrance Exams
Govt. Exams
The force on a current-carrying conductor in a magnetic field is called the Lorentz force, given by F = BIL
According to law of reflection, angle of incidence equals angle of reflection
Using transformer equation Vs/Vp = Ns/Np, we get Vs = 220 × (100/500) = 44 V
Rainbows form due to refraction of sunlight entering water droplets and dispersion of different wavelengths
Using mirror formula 1/f = 1/u + 1/v, where f = -10 cm, u = -30 cm, we get v = -15 cm (behind mirror)
Power P = 1/f (in meters). P = 1/0.15 = 6.67 Diopters (positive for converging lens)
Pascal (Pa) is the SI unit of pressure, equal to 1 N/m²
Using v² = u² + 2as, where v = 0, u = 20 m/s, a = -5 m/s². We get s = 400/10 = 40 m
Newton is a derived unit (kg⋅m⋅s⁻²). Ampere, Kelvin, and Mole are SI base units
Using v² = u² - 2gh, where final velocity v = 0, u = 40 m/s, g = 10 m/s². We get h = 1600/20 = 80 m