Meir Achuz said:If the resistance did not change with temperature (But, it does.) due to the current through it, then the resistance of the three bulbs in series would be 3 times the resistance of one bulb. The power (given by P=V^2/R) would be
25/3=8 Watts. You read 12 Watts (>8), because there is 1/3 the current through each bulb. They stay cool and have a smaller resistance than a hot bulb.
Wiring lights in series means that the lights are connected one after the other in a single loop. This means that the current flows through each light in the circuit, one after the other.
Wiring lights in series decreases the overall brightness of the lights. This is because the total amount of current flowing through the circuit stays the same, but it is divided between each light, resulting in a lower current and therefore, a dimmer light.
If one light in a series circuit goes out, the entire circuit will be broken and all lights will go out. This is because the current flow is disrupted, and without a complete loop, the circuit cannot function.
The total resistance in a series circuit is equal to the sum of the individual resistances of each component. This can be calculated by adding up the resistance values of each light or other component connected in the series.
One advantage of wiring lights in series is that it allows for individual control of each light. However, one disadvantage is that if one light goes out, the entire circuit will be broken. Additionally, wiring lights in series decreases the overall brightness and can result in uneven lighting if the lights have different resistances.