%20DUAL%20NATURE%20OF%20MATTER%20AND%20RADIATION - Topic Wise Multiple Choice Questions (MCQ)
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1 )
Particle A and B have electric charge + q and + 4 q. Both have mass m. If both are allowed to fall under the same p.d., ratio of velocities (VA / VB) = …………
2 )
Energy of photon having wavelength λ is 2 eV. This photon when incident on metal. Maximum velocity of emitted is V. If λ is decreased 25% and maximum velocity is made double, work function of metal is……….eV
3 )
When electric bulb having 100 W efficiency emits photon having wavelength 540 nm every second, numbers of photons will be……..(h = 6 × 10–34 J.s, c = 3 × 108 ms–1)
4 )
If velocity of free electron is made double, change in its de-Broglie wavelength will be……..
5 )
de-Broglie wavelength of proton accelerated under 100 V electric potential difference is λ0. If de-wave length α-particle accelerated by the same electric potential difference what will its bouglie wavelength……….