MCQ
Unit of Stefan's constant is
- A$J\,{s^{ - 1}}$
- ✓$J\,{m^{ - 2}}{s^{ - 1}}{K^{ - 4}}$
- C$J\,{m^{ - 2}}$
- D$J\,s$
$ \Rightarrow \sigma = J{m^{ - 2}}{s^{ - 1}}{K^{ - 4}}$
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| Colum $I$ | Colum $II$ |
| $(A)$ Velocity-time graph | $(p)$ Slope $\rightarrow$ negative |
| $(B)$ Acceleration-time graph | $(q)$ Slope $\rightarrow$ positive |
| $(C)$ Displacement-time graph | $(r)$ Slope $\rightarrow$ zero |
| $(s)$ $\mid$ Slope $\mid \rightarrow$ increasing | |
| $(t)$ $\mid$ Slope $\mid$ $\rightarrow$ decreasing | |
| $(u)$ |Slope| $\rightarrow$ constant |
Reason : Induced $emf$ always opposes the change in magnetic flux responsible for its production.
