Which light bulb will glow brighter |

## Which light bulb will glow brighter:

If we power two lamps in succession, the first with a power of 60 watts and the second with a power of 100 watts, which of the two lamps will glow more: the first lamp with a power of 60 watts or the second lamp with a power of 100 watts?

In this brief educational article we will try to answer this question by using electrical relations, Well-known, such as Ohm's Law, and we have previously provided a detailed explanation of it, which you can browse from here.

### Which light bulb will glow the brightest?

When two lamps are connected in series, the electric current will pass through both of them in the same amount, but in terms of electrical voltage it depends on the resistance of each lamp and here we have this relation :

**V=R×I**So the electric current is:

*I=V/R*

I = 13.2 AI = 13.2 A

Voltage of the first 100-watt lamp:

*V=IR*

V=13.2×14

V=184.8vV=13.2×14

V=184.8v

*
Voltage of the second 60-watt lamp:*

*V=IR*

V=13.2×16

V=209.6vV=13.2×16

V=209.6v

Since the electrical voltage is what determines the intensity of the lamp’s illumination, a 100-watt lamp that has less voltage passing through it will light or glow more than a 60-watt lamp because the low voltage on the 100-watt lamp is less than the low voltage on the 100-watt lamp 60 watts.

To simplify the matter, a 100-watt light bulb will consume more electrical current than a 60-watt light bulb, and therefore the first bulb will glow more than the second 60-watt bulb.