An electron is moving through a field. It is moving (i) opposite an electric field (ii) perpendicular to a magnetic field as shown. For each situation the de-Broglie wave length of electron
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a
increasing, increasing
b
increasing, decreasing
c
decreasing, same
d
same, same
answer is C.
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Detailed Solution
λ=hmv Since v is increasing in case (i), but it is not changing in case (ii). Hence, in the first case de-Broglie wavelength will change, but it second case, it remains the same