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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2008
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Q)

The measurement of the electron position is associated with an uncertainty in momentum, which is equal to $1 \times 10^{ –18}$ g $cm s^{ –1}$. The uncertainty in electron velocity is : (Mass of an electron is $9 \times10^{–28}$ g)


( A ) $1 \times 10^5 cm s^{–1}$
( B ) $1\times 10^6 cm s^{–1}$
( C ) $1.1\times10^9 cm s^{–1}$
( D ) $1 \times 10^{11} cm s^{–1}$

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