Q2. Solar or photovoltaic (PV) cells convert sunlight to
electricity and are commonly used to power calculators, satellites,
remote communication systems, and even pumps. The conversion of
light to electricity is called the photoelectric effect. It was
first discovered in 1839 by Frenchman Edmond Becquerel, and the
first PV module, which consisted of several cells connected to each
other, was built in 1954 by Bell Laboratories. The PV modules today
have conversion efficiencies of about 12 to 15 percent. Noting...