If 7 years is subtracted from the present age of Rohit

Calculate the speed of light in diamond if its refractive index is 2.4.

(Speed of light = 3 × 10⁸ m/s)

A person throws a ball from ground level at speed u and angle θ. The ball reaches maximum height H and range R. What is the ratio H/R?

The colour of sky appears blue due to –

In an AC circuit, voltage and current are given by V = 200 sin(ωt) and I = 10 sin(ωt + π/3). What is the average power consumed?

If Planck’s constant h, gravitational constant G, and speed of light v are taken as fundamental units, the dimension of time is:

A body of mass 2 kg is moving with velocity 3 m/s. What is its kinetic energy?  

An athlete can jump farther by running before jumping due to which type of inertia?

When a capacitor is fully charged in a DC circuit, the current through it is:

How long does an image remain on the retina after the object is removed?

The experimental evidence that the electron exhibits wave-like characteristics was first provided by: