A current is established in a gas discharge tube of cross section 8*10^4 . m^2 when a sufficiently high potential difference (say 32kv) is applied across the two electrodes in the tube. The gas ionises, electrons move towards the positive terminal and positive ions towards the negative terminal. The magnitude and sense of the current in a hydrogen discharge tube in which 3* 10^18 electrons and 2* 10^18 protons move past cross sectional area of the tube each second is
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so sorry I won't be able to solve this
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