A lamp receives an input power of $6.0\,\text{W}$. In $3.0\,\text{s}$, the lamp loses $2.7\,\text{J}$ of energy. What is the efficiency of the lamp?
- A$0.15$
- B$0.45$
- C$0.55$
- D$0.85$
Physics 5054 · O Level · Efficiency
Physics 5054 · O Level · Efficiency
A lamp receives an input power of $6.0\,\text{W}$. In $3.0\,\text{s}$, the lamp loses $2.7\,\text{J}$ of energy. What is the efficiency of the lamp?