12.1 All ConceptsWatch Now!
2:14:58 Duration
12.2 Multiple Choice Questions Watch Now!
1:05:42 Duration
12.3 Short Answer Type QuestionsWatch Now!
1:15:56 Duration
12.4 Long Answer Type QuestionsWatch Now!
58:39 Duration
12.5 Electricity - Complete Chapter in One VideoWatch Now!
5:32:33 Duration