List - I | List – II | ||
A. | Chondrichthyes | i. | Clarias |
B. | Cyclostomata | ii. | Carcharodon |
C. | Osteichthyes | iii. | Myxine |
D. | Amphibia | iv. | Ichthyophis |
A. Chondrichthyes: Cartilaginous fishes, such as sharks (e.g., Carcharodon). A-II
B. Cyclostomata: Jawless fishes, such as hagfish (e.g., Myxine). B-III
C. Osteichthyes: Bony fishes, such as catfish (e.g., Clarias). C-I
D. Amphibia: Amphibians, such as caecilians (e.g., Ichthyophis). D-IV
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :