Q:

Some tips and related energy conversions are given below?
(i) Electrical Generator - Electrical from Mechanical
(ii) Electric motor - electro-to-mechanical
(iii) Diesel engine - electric from light
(iv) Solar cells - chemical to mechanical
Which of the above pairs is related to it?

• 1
  (i) and (ii)
• 2
  (i) and (iii)
• 3
  (ii) and (iv)
• 4
  (iii) and (iv)