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# Electric Fields

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1. Hi, the question is: 'How much acceleration will an alpha particle undergo whilst in an electric field of 10kVm^-1?'

I used a = EQ/m where E = 10kVm^-1, Q = 1.6 x 10^-19 and m = 6.64 x 10^-27.

Working this out I get around 2.41 x 10^11 ms^-2. However, the answer is 4.8 x 10^11 ms^-2 which is twice my answer but I don't understand why :/
2. (Original post by vicsjaggers)
Hi, the question is: 'How much acceleration will an alpha particle undergo whilst in an electric field of 10kVm^-1?'

I used a = EQ/m where E = 10kVm^-1, Q = 1.6 x 10^-19 and m = 6.64 x 10^-27.

Working this out I get around 2.41 x 10^11 ms^-2. However, the answer is 4.8 x 10^11 ms^-2 which is twice my answer but I don't understand why :/
Your equations are right but the charge on an alpha particle is 2e = 2 x 1.6 x 10^-19, since it contains 2 protons. Hence the acceleration will be twice as large.

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