Separation between two parallel plates facing each other is 2 cm and surface area l2= 10 cm2. If 106 electrons of velocity 108 m/s projected into the gap between plates of potential difference ∆v=400 V, the deflection of an electron is :

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17.6 mm

1.76 mm

0.176 mm

Zero

answer is A.

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Detailed Solution

Deflection ∆y=12at2=12eEm1v02=12e∆vmd1v02=1.76 x 10-2 m=17.6 mm

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