Physics 5054 · O Level · Efficiency

Efficiency — practice question

The combined area of three solar panels is $7.2\,\text{m}^2$. In total, they deliver $1.0\,\text{kW}$ of power. For each panel, an area of $1.0\,\text{m}^2$ receives $0.80\,\text{kJ}$ of energy from the Sun in $1.0\,\text{s}$. What is the efficiency of the solar panels?

  • A$11\%$
  • B$17\%$
  • C$52\%$
  • D$80\%$

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