A student wants to build a circuit with four light bulbs and one bell. A student wants to place a switch in the circuit so that only one light will still be on and the bell will still ring when the switch is opened

we have an circuit with two branches in parallel,

* One formed by the switch and three light bulbs

* Another branch formed by a light bulb and the bell

Explanation:

For the construction of the circuit, let us analyze the conditions given, of the 4 light bulbs, only one should remain lit when the dapple is opened, so we must place three light bulbs and the switch in one branch and the other light bulb in the other branch.

For the bell to sound with the abort circuit it must be on the branch where the single bulb is.

Therefore we have an circuit with two branches in parallel,

* One formed by the switch and three light bulbs

* Another branch formed by a light bulb and the bell

ya te mando la respuesta

the answer is 12 as i may remember

: )