In the given figure flux through surface $S_1$ is ${\varphi }_1$ and through $S_2$ is ${\varphi }_2$. Which is correct?

Q.

The graph between the stopping potential ($V_0$) and $\left(\frac{1}{\lambda }\right)$ is shown in the figure. ${\varphi }_1$,${\varphi }_2$ and ${\varphi }_3$ are work functions, which of the following is/are correct.

Q. The graph between the stopping potential $\left(V_0\right)and\left(1/\lambda \right)$ is shown in the Fig. ${\varphi }_1,{\varphi }_{2}and{\varphi }_3$ are work functions. Then, which of the following is/are correct?

Q. Two waves represented by equation $y_1=A\sin (\omega t-kx+{\varphi }_1)$ and $y_2=A\sin (\omega t-kx+{\varphi }_2)$ are superimposed such that the amplitude of resultant wave is $A$. Find the phase difference between them.
Given: $({\varphi }_1>{\varphi }_2)$

Q. Consider two concentric spherical surfaces $S_1$ with radius $a$ and $S_2$ with radius $2a$, both centred on the origin. There is a charge $+q$ at the origin, and no other charges. Compare the flux ${\varphi }_1$ through $S_1$ with the flux ${\varphi }_2$ through $S_2$.

Q. If the electric flux entering and leaving and enclosed surface respectively is ${\varphi }_1$ and ${\varphi }_2$, the electric charge inside the surface will be