Find the :
maximum frequency of X-rays produced by 30 kV electrons.

Find the : minimum wavelength of X-rays produced by 30 kV electrons.

If two sound waves of equal intensity I produce beats, then the maximum intensity of sound produced in beats will be

Find the maximum kinetic energy of electrons ejected from a certain material if material's work function is 2.3 eV and the frequency of the incident radiation is 3.0 xx 10^15 Hz .

Find the maximum kinetic energy of electrons ejected from a certain material if materials work function is 2.3eVand the frequency of the incident radiation is 3 xx 10^15 Hz

The maximum frequency of transmitted radio waves above which the radio waves are no longer reflected back by ionosphere is (N = maximum electron density of ionosphere, g = acceleration due to gravity)

The frequency of the fundamental note produced by a closed organ pipe is n. If the diameter of the pipe is doubled, then the frequency of the fundamental note produced by it will be (Neglect end correction)

Which of the following has maximum number of unpaired electrons?

A pipe closed at one end produces a fundamental note of frequency 412 Hz . If it is cut into two pieces of equal lengths, then the fundamental frequencies produced by the two pieces would be

A length of sonometer wire under constant tension when sounded with a tuning fork of higher frequency 271 Hz produced 5 beats per second. If the length of the wire is reduced by 5%, find the new frequency of the wire.

An electron in an atom revolves around the nucleus in an orbit of radius 0.5 A and the frequency of revolution of electron is 1010 MHz. Then current is_______.