Question 23
The table shows the efficiency of three different lamps.
| Type of lamp | Percentage of energy transferred electrically as light | Percentage as heat |
|---|---:|---:|
| Tungsten | 15 | 85 |
| Fluorescent | 80 | 20 |
| LED | 90 | 10 |
If 100 J of energy is used by the tungsten lamp, how much energy is wasted?
| Type of lamp | Percentage of energy transferred electrically as light | Percentage as heat |
|---|---:|---:|
| Tungsten | 15 | 85 |
| Fluorescent | 80 | 20 |
| LED | 90 | 10 |
If 100 J of energy is used by the tungsten lamp, how much energy is wasted?
