The circuit current is interrupted and all the lights will go out.
it either blows up or worn out
In that case, the entire circuit won't work.
the light bulb gives off more light
The circuit will have the flow of electricity interrupted.
In a series circuit, all bulbs are necessary to complete the circuit. If one bulb goes out, the circuit is broken, so none of the bulbs would light up.
All of the light bulbs in the series circuit would go out.
Resistance is increased so the light will be dimmer.
If you unscrewed any bulb in the circuit it would turn all of the bulbs off.
The rest of the lights in the system will remain illuminated. Except in that branch of the circuit. The parallel branch(s) get more current if the voltage potential remains the same.
Nothing.
No. Circuit is open but still HOT.
A parellel circuit does not fail if one light dies. In a series circuit, it's broken if one light fails (like the old style Christmas lights). See link for example...