Questions

A device which is used to convert light energy directly into electrical energy is called as photovoltaic cell or a solar cell.

Heliostats convert light energy into heat energy.

A thermocouple is a device for measuring temperature.

In the given puzzle, the logic is

2 + 3 = 10 => (2 + 3) * 2 = 10

6 + 3 = 54 => (6 + 3) * 6 = 54

8 + 3 = 88 =>  (8 + 3) * 8 = 88

Similarly,

9 + 7  => (9 + 7) * 9 = 16 x 9 = 144.

It belongs to the field of Fashion Designing

Achal Kumar Jyoti (64), a retired 1975 IAS Officer batch of Gujarat Cadre, is the newly appointed Chief Election Commissioner (CEC), who took over as the head of the Election Commission in New Delhi on today. He succeeded Dr Nasim Zaidi. Jyoti will continue as the Chief Election Commissioner till January 17, 2018. Prior to this appointment, he was Election Commissioner of India. A CEC or an EC can have a tenure of six years or hold office till the age of 65 years, whichever is earlier.