A generation ago, homes were lit up by incandescent light bulbs which contain very fine filament wire that lights up when a current runs through the filament. The higher the current, the brighter the bulb lit up. For a fixed house voltage of 120V, the higher the current, the more power was being used. So altogether, the more power, the more current was running as the bulbs burned brighter. Small 4W bulbs were commonly used in plug-in night lights. Medium sized 60W bulbs were commonly used in lamps and light fixtures. Power (W) is the product of current (A) and voltage (V). Using the formula for power, P, calculate the current through the 4W and 60W bulbs running on a house voltage of 120V: Nightlight 4W bulbs run about? Lamp 60W bulbs run about ? (Answer in mA, or A)
![A generation ago, homes were lit up by incandescent light bulbs which contain very fine filament wire that lights up when a current runs through the filament. The
higher the current, the brighter the bulb lit up. For a fixed house voltage of 120V, the higher the current, the more power was being used. So altogether, the more
power, the more current was running as the bulbs burned brighter. Small 4W bulbs were commonly used in plug-in night lights. Medium sized 60W bulbs were
commonly used in lamps and light fixtures.
Power (W) is the product of current (A) and voltage (V). Using the formula for power, P, calculate the current through the 4W and 60W bulbs running on a house
voltage of 120V:
Nightlight 4W bulbs run about [Select]
[ Select]
Lamp 60W bulbs run about
Con
Care
[33 mA
48 mA
7.5 A
30 A
New formula for power
P=IV
44 ↑
ها
V
W](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbf613f81-afac-457d-a030-8566833194c6%2Fa94f566f-8fcd-498f-b47a-d7f3afb193dd%2Fs9m35b_processed.png&w=3840&q=75)
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