Question
State Joule’s law about heating effect of electric current.
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(i) Which disasters are shown in the images ?
(ii) Which primary precautions will you take in case of disaster shown in ‘A’?
(iii) Which type of first-aid is offered to the injured people in disaster ‘B’?
| {:[" Speed of light in the "],[" first medium "(v_(1))]:} | {:[" Speed of light in the "],[" second medium "(v_(2))]:} | Refractive index _(2)n_(1) | Refractive index _(2)n_(1) |
| 3x10^(8)m//s | 1.2 x10^(8)m//s | - | |
| 2.25 x10^(8)m//s | 4//3 | ||
| 2x10^(8)m//s | 1.5 |