3. Answer the following questions: (Total points: 16) a. From electrical point of view, define/mathematicallyexpress energy, power; write down their units. (Answer tothe points) (Points 2+2+1+1= 6) b. A CFL

lamp has the rating 20W, 120 V. It was on for 2hours. How much energy it consumed during this time?(Points 3) c. Wind power plant/wind farm is getting high popularity toproduce electricity from wind. What are the different formsof energy are involved in this system to supply power to thegrid? (Points 3) d. According to the classical sign convention, (circle the rightanswer) (Points 4) i. heat transfer to a system is negative/positive ii. heat transfer from a system is negative/positive iii. work done by a system is negative/positive iv. work done on a system is negative/positive