All objects experience a buoyancy when they are immersed in a fluid. Buoyancy is

According to Fleming's right-hand rule, if the forefinger indicates the direction of the magnetic field and the thumb shows the direction of motion of the conductor, then the stretched middle finger will predict the direction of

Two resistors R₁ and R₂ arranged in parallel combination in an electrical closed circuit are made of the same material and of the same thickness. If the length of R₂ is twice the length of R₁, then the total resistance R satisfies

What is the magnification produced by a concave lens of focal length 10 cm, when an image is formed at a distance of 5 cm from the lens?