NEET Physics Current Electricity Questions Solved

An ionization chamber with parallel conducting plates as anode and cathode has 5×107 electrons and the same number of singly-charged positive ions per cm3. The electrons are moving at 0.4 m/s. The current density from anode to cathode is 4μA/m2. The velocity of positive ions moving towards cathode is 

(1) 0.4 m/s

(2) 16 m/s

(3) Zero

(4) 0.1 m/s

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