MCQ
In alternating current circuits, the $a.c$. meters measure
- ✓$r.m.s$. value
- BPeak value
- CMean value
- DMean square value
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| Column - $\mathrm{I}$ | Column - $\mathrm{II}$ |
| $(a)$Rain drops moves downwards with constant velocity. | $(i)$ Viscous liquids |
| $(b)$ Floating clouds at a height in air. | $(ii)$ Viscosity |
| $(iiii)$ Less density |

where $\sigma$ is the Stefan's constant.