MCQ
Sun radiates continuously and maintains its brightness because
- AHelium is converted into iron in its core
- ✓Of fusion of hydrogen nuclei into helium
- CFusion of helium in hydrogen
- DBurning of carbon, in its core
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| LIST $I$ | LIST $II$ |
| $A$ Planck's constant $( h )$ | $I$ $\left[ M ^1 L ^2 T ^{-2}\right]$ |
| $B$ Stopping potential $( Vs )$ | $II$ $\left[ M ^1 L ^1 T ^{-1}\right]$ |
| $C$ Work function $(\phi)$ | $III$ $\left[ M ^1 L ^2 T ^{-1}\right]$ |
| $D$ Momentum $( p )$ | $IV$ $\left[ M ^1 L ^2 T ^{-3} A ^{-1}\right]$ |
The following figure represents two biconvex lenses $L_1$ and $L_2$ having focal length $10 \mathrm{~cm}$ and $15 \mathrm{~cm}$ respectively. The distance between $\mathrm{L}_1 \& \mathrm{~L}_2$ is :
