MCQ
The value of Stefan’s constant is
- ✓$5.67 \times {10^{ - 8}}W/{m^2}{\rm{ - }}{K^4}$
- B$5.67 \times {10^{ - 5}}W/{m^2}{\rm{ - }}{K^4}$
- C$5.67 \times {10^{ - 11}}W/{m^2}{\rm{ - }}\,{K^4}$
- DNone of these
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Statement $1:$ In the resonance tube experiment, if the tuning fork is replaced by another identical turning fork but with its arm having been filled, the length of the air column should be increased to obtain resonance again.
Statement $2:$ On filling the arms, the frequency of a tuning fork increases.
If two springs $S_1$ and $S_2$ of force constants $k_1$ and $k_2$, respectively, are stretched by the same force, it is found that more work is done on spring $S_1$ than on spring $S_2$.
Statement $-1$: If stretched by the same amount, work done on $S_1$, will be more than that on $S_2$
Statement $-2$ : $k_1 < k_2$.
