im confised as to when we connect the cathode to the +ve terminal of the battery and the anode to the -ve terminal ? and sometimes the trend is reversed.Why so ?

Asked by jigyasa dwivedi | 21st May, 2012, 11:48: PM

Expert Answer:

In a discharging battery or galvanic cell (diagram at right) the anode is the negative terminal since that is where the current flows into the device.
 
In a recharging battery, or an electrolytic cell, the anode is the positive terminal, which receives current from an external generator. 

Answered by  | 22nd May, 2012, 07:12: AM

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