why can't be replace by diode with battery?

Question

anonymous · Answer

not sure what the question means, but a diode is like a valve it allows current to flow in one direction only, [as long as you don't reach the breakdown voltage - see I/V characteristic of diode], a battery is similar with a cathode and anode terminal, and depending on how it's connected to a circuit will flow left or right (but always negative to positive). Now, if a diode is in place and you switch around the battery, obviously, the diode wont allow the current to flow if not connected correctly.

anonymous · Answer

diode allows current through while batteries produce current. This question is like saying "why can't an heart be replaced by a vein"

anonymous · Answer

or vice versa

anonymous · Answer

i know dat diode has it 0.7 V then why cn't replace by battery ?