According to Bohrβs theory, a line in the Ballmer series arises when the electron jumps from any of the higher orbits to the orbit with quantum number:
. A force "F1" acts on a body through distance "S1" in the direction of motion and does work "W1". Similarly
another force "F2" act on same body through distance "S2" but in opposite to the direction of motion and does
work "W2". Now if F1 = F2 and S1 = S2 then which statement is correct.
An engine pumps up 100 kg of water through a height of 10m in 5s. Given that the efficiency of the engine is 60%, what is the power of the engine? (Take g = 10ms-2)
If the radius of the circular path of particle going around the circle is doubled without changing its frequency of
rotation, then centripetal force on it is.
A proton, accelerated through a p.d V has a certain de Broglie wavelength. In order to have the same de Broglie wavelength, an π βparticles must be accelerated through a potential difference:
You lift a heavy book from the floor of the room and keep it in the book-shelf having a height 2 m. In this process
you take 5 seconds. The work done by you will depend upon:
Figure represents a graph of kinetic energy (K) of the photoelectrons (in eV) and frequency (v) for a metal used as cathode in photoelectric experiment. The work function of metal is:
