An electron is moving with an initial velocity v = v₀ i ⃗ and
is in a magnetic field B = B0 j ⃗. Then, it's de-Broglie
wavelength
(a) remains constant
(b) increases with time
(c) decreases with me
(d) increases and decreases periodically
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72Hard X-rays for the study of fractures in bones should have
a minimum wavelength of 10⁻¹¹ m. The accelerating voltage
for electrons in X-ray machine should be
(a) < 124 kV
(b) > 124 kV
(c) between 60 kV and 70 kV
(d) = 100 kV÷÷?{;;:"':;/{}}==÷×+-_₹|~!!@#%^^**)))*&^$#!@%^&*(&7&3&&@@&4!4!5!7818182*@(@(#×|{/'/';:;{}!}!××!-!--@&~&@^@^@&|×|×|×₹++₹×
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