Question

A 130 V circuit is fused for: 20 amps. How many: 25 W clear glass incandescent light bulbs with a tungsten filament burning at: 3,000 degrees Celsius could be used at the “same time” in the circuit without tripping the magnetic breaker? Please find the current per light bulbs which btw give off a color temperature of 3,000 Kelvin

. What are the maximum number of light bulbs that may be used in question

Answer 1

Voltage of circuit=130v

Current rating=20A

Wattage of Incandescent light=25W

Temperature=3000kelvin

Number of light bulbs=(voltage *current)/wattage of light

Number of light bulbs=(130*20)/25

Number of light bulbs= 104

For the bulbs to glow the voltage must be 130v hence they must be connected in parallel, hence current per light bulb is given by

Current per light bulb= Total current/ number of bulbs

Current per light bulb=20/104=0.192A

Hence current per light bulb=0.192A