The increasing order (lowest first) for the values of e/m (charge/mass) for

A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:

Which of the following element has least number of electrons in its M-shell?

In the ground state, an element has 13 electrons in its M-shell. The element is_____

In the Bohrs model of the hydrogen atom, the ratio of the kinetic energy to the total energy of the electron in a quantum state n is:

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The displacement in metres of a body varies with time t in second as y = t2 – t – 2. The displacement is zero for a positive of t equal to

A boy starts from a point A, travels to a point B at a distance of 3 km from A and returns to A. If he takes two hours to do so, his speed is

A 180 metre long train is moving due north at a speed of 25 m/s. A small bird is flying due south, a little above the train, with a speed of 5 m/s. The time taken by the bird to cross the train is

Which one of the following is the unit of velocity?

body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s . Then t is

The change in velocity corresponding to the time interval within which the change has accelerated is known as _________________

Which among the following can be zero when a particle is in motion for some time.

The ratio of the average velocity and average speed of a body is

Musca domestica is common name of

National Botanical Research Institute is located in