Question

In a circuit with a battery, and a switch that has several light bulbs wired in a series, the circuit is connected by the light bulbs do not shine. Which of the following could NOT result in the lights beginning to shine? WHY?

a) replacing the battery

b) adding a second identical battery

c) removing one or more light bulbs from the circuit

d) removing one or more light bulbs from its socket, but leaving the sockets in the circuit

Answer 1

removing one or more light bulbs from the socket leads to the bulbs are not going to shine because when ever the bulbs are in series connection even single bulb removal makes the circuit open and ultimately causes the situation not to glow the bulbs.

If you replace battery then it may shine the bulbs

If you add second battery it also may shine the bulbs

If you removing one or more light bulbs from the circuit , but leaving the sockets in the circuit then the circuit is not open and the potential is more useful for the remaining ones and it also may cause the bulbs to shine.