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The de Broglie wavelength associated wit...

The de Broglie wavelength associated with a ball of mass 1 kg having kinetic energy 0.5 j is

A

`6.626 xx 10^(-34)m`

B

`13.20 xx 10^(-34)m`

C

`10.38 xx 10^(-29) m`

D

`6.626 xx 10^(-34) Å`

Text Solution

Verified by Experts

The correct Answer is:
A
`(1)/(2) mv^(2) = 0.5 J rArr (1)/(2) xx 1kg xx v^(2) = 0.5 J` or `v = 1ms^(-1)`
`lambda = (h)/(mv) = (6.626 xx 10^(-34) kg ms^(-1))/(1kg xx ms^(-1))`
`= 6.626 xx 10^(-24) m`.
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