Atomic and Nuclear Physics — Physics STD 12 Science — Question

A person cannot see distinctly at the distance less than one metre. Calculate the power of the lens that he should use to read a book at a distance of 25 cm(a) + 3.0 D(b)  + 0.125 D(c) – 3.0  D(d)  + 4.0 D

A short sighted person can see distinctly only those objects which lie between 10 cm and 100 cm from him. The power of the spectacle lens required to see a distant object is(a) + 0.5 D(b) – 1.0 D(c)  – 10 D(d)  + 4.0 D

Which of these is a correct definition of electronic current?

The imaginary line passing through the pole and the center of curvature of the curved mirror is called its _______.

Eight small drops, each of radius r and having same charge q are combined to form a big drop. The ratio between the potentials of the bigger drop and the smaller drop is

The turn ratio of a transformers is given as 2 : 3. If the current through the primary coil is 3 A, thus calculate the current through load resistance(a) 1 A(b) 4.5 A(c) 2 A(d) 1. 5 A

For the same speed, de Broglie wavelength.

One can define ...A... of a place as the vertical plane which passes through the imaginary line joining the magnetic North and the South–poles.Here, A refers to.