An electron is moving with an initial velocity v = v0i and is in a magnetic field B = B0 Then, its de-Broglie wavelength
(a) Remains constant
(b) Increases with time
(c) Decreases with time
(d) Increases and decreases periodically
An electron is moving with an initial velocity v = v0i and is in a magnetic field B = B0 Then, its de-Broglie wavelength
(a) Remains constant
(b) Increases with time
(c) Decreases with time
(d) Increases and decreases periodically
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1 Answer
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This is a Multiple Choice Questions as classified in NCERT Exemplar
Answer- (a)
Explanation- v=v0i and B =B0j
Force on moving electron F= e (v )
= e (v0i )=-eV0B0k
Similar Questions for you
Based on theory
z² × (13.6) (1 - ¼) = 3 × (13.6)
z = 2 . (i)
h/√2mk? = (1/2.3) × h/√2mk?
=> k? = (2.3)²k? = 5.25k? (ii)
Now, k? = E? - Φ
k? = E? - Φ = z²E? - Φ
∴ k? /k? = (10.2 - Φ)/ (4 × 10.2 - Φ) = 1/5.25
=> Φ = 3eV
- (i)
- (ii)
from (i) & (ii)
ev
hu = hu0 + K.E
Cases u = 2u0
h2u0 = hu0 + K.E1
K.E1 = hu0
- (1)
Now, cases 2
h 5u0 = hu0 + k.E2
k.E2 = 4hu0
v2 =
v2 = 2v1
This is a Short Answer Type Questions as classified in NCERT Exemplar
Sol:
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