MCQ
The terminal potential difference of a cell is greater than its $e.m.f.$ when it is
- ABeing discharged
- BIn open circuit
- ✓Being charged
- DBeing either charged or discharged
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| Object Pin | Convex Lens | Convex Mirror | Image Pin |
| $22.2\,cm$ | $32.2\,cm$ | $45.8\,cm$ | $71.2\,cm$ |
The focal length of the convex lens is $f_1$ and that of mirror is $f_2$. Then taking index correction to be negligibly small, $f_1$ and $f_2$ are close to