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JEE Main 2013 Physics question

PhysicsDual Nature of Matter and RadiationJEE Main 2013

Electrons are accelerated through a potential difference V and protons are accelerated through a potential difference 4 V. The de-Broglie wavelengths are and for electrons and protons respectively. The ratio of is given by: (given is mass of electron and is mass of proton).

Answer: (4)

Solution

and both particles carry charge e.

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Question ID VK-104100