1.

An alpha-particle is in electric field of 15 xx 10^4 V/m So, the force experienced by it is......N.

Answer»

(A) `4.8 xx 10^(-12)`
(B) `4.8 xx 10^(-13)`
(C) `4.8 xx 10^(-14)`
(D) `4.8 xx 10^(-18)`

Solution :`F=qE`
`=(2e)E`(`THEREFORE` For `ALPHA`-PARTICLE, q=2e)
`=2 xx 1.6 xx 10^(-19) xx 15 xx 10^(4) (therefore e=1.6 xx 10^(-19)C)`
`=4.8 xx 10^(-14)` N


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