Question

What is the current in the bulb r1 after removing bulb r4 from the circuit and leaving a break in the wire at its position?

Answer 1

Removing bulb r4 from a series circuit and leaving a break in the wire stops all current flow, so the current in bulb r1 would be zero.

Step-by-step explanation:

To determine the current in the bulb r1 after removing bulb r4 from the circuit and leaving a break in the wire at its position, we must understand how removing a bulb affects the overall circuit.

Referring to the provided information, the current in a circuit with bulbs connected in series can be found using Ohm's Law, which is
`I = V/R`. When
`r4` is removed, the circuit is open at that position, which means no current can flow through the circuit. Therefore, the current in bulb r1 (or any bulb in the circuit) will be zero because there is no closed path for the electricity to flow.

If we were dealing with a parallel circuit, the removal of one bulb wouldn't stop the current in the other paths. However, since this scenario specifies a series circuit, any break in the circuit stops the entire flow of current.