DE-BROGLIE WAVE THEORY, HEISENBERG UNCERTAINITY PRINCIPLE
1. Wavelength of the wave associated with a moving electron
Decreases as speed of electron Increases.
Increases as speed of electron Increases.
Independent of speed of electron.
Is zero.
2. If an electron and H-atom have the same de Broglie wavele gth, then the ratio of their velocities is
1) 1836:1 2) 1:1836 3) 1:1 4) 1:2
3. A hydrogen molecule and helium atom are moving with the same velocity. Then the ratio of their de Brogile wavelength is
1) 1:1 2) 1:27 3) 2:1 4) 2:3
4. Wavelength of an electron s 5Aº.V locity of the electron is
| 1) | 1.45 × 108 cm/s | 2) | 1.6 × 10–8cm/s | |
| 3) | 3.2 × 10–27cm/s | 4) | 3.2 × 1027cm/s | |
| 5. The momentum of particle of wavelength 10A° is | | |||
| 1) | 6.625 × 10–27 g. cm.s–1 | 2) | 6.625 × 10–19 g. cm.s–1 | |
| | | | ||
| 3) | . | 4) | 6.625 × 10–23 g. cm.s–1 | |
| 6.625 × 10–20 g. cm.s–1 | | |||
6. The de Broglie wavelength of a particle with mass 1 0mg and velocity 100 cm/s is
1) 6.63 × 10–27 cm 2) 6.63 × 10–27 A°
3) 6.63 × 10–29 cm 4) 6.63 × 10–29 A°
7. The de Broglie wave length of a an Iron ball of mass 2 mg moving with a velocity of 2Km/sec is
| 1) | 6.6 10 34 | m | | 2) | 6.6 10 31 | | m | | | | |
| 4 | | 4 | | | | | |||||
| | | | | | | | | | | ||
| 3) | 6.6 10 30 | m | | 4) | 6.6 10 27 | | m | | | | |
| 4 | | 4 | | | | | | ||||
| | | | | | | | | | | ||
| 8. The de- Broglie’s wavelength of a particle having momentum | f | | | ||||||||
| 3.3125 × 10–24 kg.ms–1 will be | | | | | | | | | |||
| 1) 2 × 10–10A° | 2) 2 A° | 3) 2 × 10–10cm | | | 4) 2 nm | | |||||
| | | | | | | . | | | |||
| | | | | | | | | com | | ||
9. The de Broglie wavelength of a tennis ball of mass 6.625 g moving with a velocity of 100cm per second is
1) 10–33 m 2) 10–31 m 3) 10–33 m 4) 10–31 cm
10. The de Broglie wavelength associated with a ball of mass, 200 g and moving at a speed of 5 metres/sec, is in the order of
1) 10–32 m 2) 10–34 m 3) 10–31 m 4) 10–30 m
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