2006-12-14 19:46:59 · 4 answers · asked by Catherine C 1 in Science & Mathematics ➔ Engineering
<>The higher the W(attage), the more power is used.
2006-12-14 20:00:45 · answer #1 · answered by druid 7 · 0⤊ 0⤋
W stands for watt, the unit of power, so the 120 W bulb uses more energy than the 40W bulb. This is because the 120W bulb has 1/4 the resistance of the 30W bulb.
2006-12-14 20:10:37 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋
30 W will use 30 units of power in one hour
120 W will use 120 units of power in one hour,when both the bulbs are connected to their rated voltage.
If the rated voltage for both the above bulbs is 120 v and you connect it to 240 V source, both will get fused, still 120 W will draw more power before fusing.
When these bulbs are connected to their rated power source and both are put on for same time period, the 120 W bulb will draw 4 times the 30W bulb
2006-12-14 21:43:59 · answer #3 · answered by sudhir49garg 2 · 0⤊ 0⤋
The "W" is short for "watt" which is a unit of electrical power (power is energy or work divided by time, or the rate at which energy is used). Thus, the 120W bulb uses energy at a higher rate (i.e., uses more power) than a 30W bulb.
2006-12-14 19:52:14 · answer #4 · answered by TimmyD 3 · 0⤊ 0⤋