Four 9-volt batteries are connected in parallel. How much voltage is active across the circuit?
The voltage across each 9-volt battery is 9 volts. Since they are connected in parallel, the total voltage across the circuit is also 9 volts.
When batteries are connected in parallel, the voltage across the circuit remains the same as the voltage of a single battery. In this case, the voltage across the circuit would be 9 volts.
To find the total voltage across a circuit with batteries connected in parallel, you simply need to consider the voltage of each individual battery. In this case, you have four 9-volt batteries connected in parallel.
Since batteries connected in parallel have the same voltage, each of the four batteries will have a voltage of 9 volts.
Therefore, the total voltage across the circuit with four 9-volt batteries connected in parallel is also 9 volts.