5. Water is filled up to a height $h$ in a beaker of radius $R$ as shown in the figure. The density of water is $\rho$, the surface tension of water is $T$ and the atmospheric pressure is $P _ { 0 }$. Consider a vertical section ABCD of the water column through a diameter of the beaker. The force on water on one side of this section by water on the other side of this section has magnitude [Figure] (A) $\left| 2 P _ { 0 } R h + \pi R ^ { 2 } \rho g h - 2 R T \right|$ (B) $\left| 2 P _ { 0 } R h + R \rho g h ^ { 2 } - 2 R T \right|$ (C) $\left| P _ { 0 } \pi R ^ { 2 } + R \rho g h ^ { 2 } - 2 R T \right|$ (D) $\left| P _ { 0 } \pi R ^ { 2 } + R \rho g h ^ { 2 } + 2 R T \right|$ Answer [Figure] (A) [Figure] (B) [Figure] (C) [Figure] (D)
A spherical portion has been removed from a solid sphere having a charge distributed uniformly in its volume as shown in the figure. The electric field inside the emptied space is [Figure] (A) zero everywhere (B) non-zero and uniform (C) non-uniform (D) zero only at its center Answer [Figure] (A) (B) (C) (D)
Positive and negative point charges of equal magnitude are kept at $\left( 0,0 , \frac { a } { 2 } \right)$ and $\left( 0,0 , \frac { - a } { 2 } \right)$, respectively. The work done by the electric field when another positive point charge is moved from $( - a , 0,0 )$ to $( 0 , a , 0 )$ is (A) positive (B) negative (C) zero (D) depends on the path connecting the initial and final positions Answer
The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 nm . The smallest wavelength in the infrared region of the hydrogen spectrum (to the nearest integer) is
5. Water is filled up to a height $h$ in a beaker of radius $R$ as shown in the figure. The density of water is $\rho$, the surface tension of water is $T$ and the atmospheric pressure is $P _ { 0 }$. Consider a vertical section ABCD of the water column through a diameter of the beaker. The force on water on one side of this section by water on the other side of this section has magnitude\\
\includegraphics[max width=\textwidth, alt={}, center]{e79946a0-735d-438d-ac42-5265ab72284d-02_454_394_1005_1398}\\
(A) $\left| 2 P _ { 0 } R h + \pi R ^ { 2 } \rho g h - 2 R T \right|$\\
(B) $\left| 2 P _ { 0 } R h + R \rho g h ^ { 2 } - 2 R T \right|$\\
(C) $\left| P _ { 0 } \pi R ^ { 2 } + R \rho g h ^ { 2 } - 2 R T \right|$\\
(D) $\left| P _ { 0 } \pi R ^ { 2 } + R \rho g h ^ { 2 } + 2 R T \right|$
Answer
\begin{figure}[h]
\begin{center}
\includegraphics[alt={},max width=\textwidth]{e79946a0-735d-438d-ac42-5265ab72284d-02_104_104_1763_328}
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\caption{(A)}
\end{center}
\end{figure}
\begin{figure}[h]
\begin{center}
\includegraphics[alt={},max width=\textwidth]{e79946a0-735d-438d-ac42-5265ab72284d-02_97_93_1766_494}
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\caption{(B)}
\end{center}
\end{figure}
\begin{figure}[h]
\begin{center}
\includegraphics[alt={},max width=\textwidth]{e79946a0-735d-438d-ac42-5265ab72284d-02_93_96_1770_646}
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\caption{(C)}
\end{center}
\end{figure}
\begin{figure}[h]
\begin{center}
\includegraphics[alt={},max width=\textwidth]{e79946a0-735d-438d-ac42-5265ab72284d-02_93_94_1770_794}
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\caption{(D)}
\end{center}
\end{figure}
\begin{enumerate}
\setcounter{enumi}{5}
\item A spherical portion has been removed from a solid sphere having a charge distributed uniformly in its volume as shown in the figure. The electric field inside the emptied space is\\
\includegraphics[max width=\textwidth, alt={}, center]{e79946a0-735d-438d-ac42-5265ab72284d-03_218_224_326_730}\\
(A) zero everywhere\\
(B) non-zero and uniform\\
(C) non-uniform\\
(D) zero only at its center\\
Answer\\
\includegraphics[max width=\textwidth, alt={}, center]{e79946a0-735d-438d-ac42-5265ab72284d-03_105_566_837_330}\\
(A)\\
(B)\\
(C)\\
(D)
\item Positive and negative point charges of equal magnitude are kept at $\left( 0,0 , \frac { a } { 2 } \right)$ and $\left( 0,0 , \frac { - a } { 2 } \right)$, respectively. The work done by the electric field when another positive point charge is moved from $( - a , 0,0 )$ to $( 0 , a , 0 )$ is\\
(A) positive\\
(B) negative\\
(C) zero\\
(D) depends on the path connecting the initial and final positions\\
Answer
\end{enumerate}
\begin{figure}[h]
\begin{center}
\includegraphics[alt={},max width=\textwidth]{e79946a0-735d-438d-ac42-5265ab72284d-03_95_97_1824_335}
\captionsetup{labelformat=empty}
\caption{(A)}
\end{center}
\end{figure}
\begin{figure}[h]
\begin{center}
\includegraphics[alt={},max width=\textwidth]{e79946a0-735d-438d-ac42-5265ab72284d-03_102_93_1817_494}
\captionsetup{labelformat=empty}
\caption{(A)}
\end{center}
\end{figure}
\begin{figure}[h]
\begin{center}
\includegraphics[alt={},max width=\textwidth]{e79946a0-735d-438d-ac42-5265ab72284d-03_95_98_1824_644}
\captionsetup{labelformat=empty}
\caption{(A)}
\end{center}
\end{figure}
\includegraphics[max width=\textwidth, alt={}, center]{e79946a0-735d-438d-ac42-5265ab72284d-03_95_94_1824_794}\\
(B)\\
(C)\\
(D)\\