Question

What will happen if i connect a 4 volts battery in parallel with a 2 volts battery?

Answer 1

When batteries are connected in parallel the total voltage of the circuit will be equal to the largest voltage source i-e 4 volts
but the amount of current will increases

when the batteries are connected in series their total voltage will be equal to the sum of both the voltages i-e 2+4=6volts

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