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qUESTIONS

An electron and a proton are moving in the same direction with same kinetic energy. The ratio of the de- Broglie wavelength associated with these particles is

A particle A has a charge q and particle B has charge +4q with each of them having the mass m. When they are allowed to fall from rest through same potential difference the ratio of their speeds vA/vB will be

A particle of mass M at rest decays into two masses m and m, with non-zero velocities. The ratio of de-Broglie wavelengths of the particles λ1/ λ2 is

A proton and α-particle are accelerated through same potential difference. The ratio of their de-Broglie wavelengths, will be

If nR and nv denote the number of photons emitted by a red bulb and violet bulb of equal power in a given time, then

A charged particle of mass m and charge q is released from rest in an uniform electric field E neglecting the effect of gravity, the kinetic energy of the charged particle after t second is

The energy of incident photons corresponding to maximum wavelength of visible light is

The de-Broglie wavelength of an electron, α-particle and proton all having the same kinetic energy is respectively given as λe, λα, and λp. Then which of the following is not true?

For the Bohr’s second orbit of circumference 2πr, the de- Broglie wavelength of revolving electron will be

If the kinetic energy of a free electron doubles, its de- Broglie wavelength changes by the factor

1 2 3

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