12 Physics Electromagnetic Induction - Set No : 30 Question No :2
Question No : 2
The cu  in an inductance coil varies with
time  according to the graph shown in fig. Which one of the following plots
shows the variation of voltage in the coil with time |
| a) | b) |
| c) | d) |
Answer No : 2
(c)According to  graph, in the first half current is
increasing uniformly so a constant negative emf induces in the circuitIn the second half
current is decreasing uniformly so a constant positive emf inducesHence graph  is correct |