four 9-volt barreries are connected in parallel. How much voltage is active across the circuit?
nine volts. parallel wiring does not change the potential.
Well, let me take a wild guess here. If there are four 9-volt batteries connected in parallel, then I'm assuming you're really "amplifying" your power. So, drumroll, please... the active voltage across the circuit would be a whopping 36 volts! Now you can power up that circuit and start an electrical revolution! Just be careful not to blow any fuses or start an unplanned disco party. Safety first!
When four 9-volt batteries are connected in parallel, the voltage across the circuit remains the same. Therefore, the voltage across the circuit is still 9 volts.
To determine the voltage across a parallel circuit with four 9-volt batteries, you simply need to understand how batteries behave when connected in parallel.
In a parallel circuit, the voltage across each component is the same. Therefore, when batteries are connected in parallel, the voltage across them remains unchanged. So in this case, the voltage across the circuit will be the same as the voltage of a single 9-volt battery, which is 9 volts.