There are three light bulbs in parallel, powered by a single battery. A fourth b

ID: 3894008 • Letter: T

Question

There are three light bulbs in parallel, powered by a single battery. A fourth bulb is added in parallel.

(a) What effect does this have on the three other light bulbs?

The bulbs will all get brighter.

The bulbs will all get dimmer.

The bulbs will all stay the same brightness.

(b) What effect is there on the battery that is powering the circuit?

The battery will put out more current and last the same amount of time.

The battery will put out more current and last less amount of time.

The battery will put out less current and last the same amount of time.

The battery will put out less current and last a longer amount of time.

R eq changes from R/3 to R/4

I drawn from battery changes from 3V/R to 4V/R

in each bulb current was previously 1/3(3V/R) = V/R , now it is 1/4 * (4V/R) = V/R => same

So The bulbs will all stay the same brightnes

I drawn from battery changes from 3V/R to 4V/R => The battery will put out more current and last less amount of time.

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