In a transistor amplifier, the voltage gain is

Match of the following.
\(\begin{array}{ll}
\hline \text{ Column I } & \text{ Column II } \\
\hline \begin{array}{ll}
\text{A. Ratio of } \frac{\Delta Q}{\Delta U} \text{ in an isobaric} \\
\text{process}
\end{array} & 1. \frac{T_1}{\left(T_1-T_2\right)} \\
\hline \begin{array}{ll}
\text{B. Ratio of } \frac{\Delta Q}{\Delta W} \text{ in an isobaric} \\
\text{process}
\end{array} & 2. \frac{T_2}{\left(T_1-T_2\right)} \\
\hline \begin{array}{l}
\text{C. Coefficient of performance} \\
\text{of a refrigerator}
\end{array} & 3. \frac{\gamma}{\gamma-1} \\
\hline \begin{array}{l}
\text{D. Coefficient of performance} \\
\text{of a heat pump}
\end{array} & 4. \gamma \\
\hline
\end{array}\)
Codes
\(\begin{array}{llll}A & B & C & D\end{array}\)

A coil of wire of radius \(r\) has 600 turns and a self inductance of \(108 \mathrm{mH}\). The self inductance of a coil with same radius and 500 turns is

A particle of mass $\text{'}m\text{'}$, moving with a velocity $\text{'}v\text{'}$ makes an elastic collision in one dimension with a stationary particle of mass $\text{'}m\text{'}$. During the collision, they remain in contact with each other for an extremely small time $\text{'}T\text{'}$: Their force of contact, with time is shown in the figure. Then $F_0=$

A regular hexagon of side \(5 \mathrm{~cm}\) has a charge \(10 \mu \mathrm{C}\) at each of its vertices. The potential at the centre of hexagon is

Two blocks of masses \(1 \mathrm{~kg}\) and \(2 \mathrm{~kg}\) are connected by a metal wire going over a smooth pulley. The breaking stress of metal is \(\frac{40}{3 \pi} \times 10^6 \mathrm{Nm}^{-2}\). What should be the minimum radius of wire used if it should not break? \(\left(g=10 \mathrm{~ms}^{-2}\right)\)

The volume of a liquid is proportional to......, given its density \(\rho\), viscosity \(\eta\) and \(t\) the time of flow through a capillary tube of length \(L\) and radius \(R\), with a pressure difference \(p\) across its ends

If $f:R\to R$ is defined as $f\left(x\right)={\left(2020-x^{2019}\right)}^{1/2019},\forall x\in R,$ find $(f\circ f\circ f\circ f)\left(\frac{2019}{2020}\right)$

Two dice are thrown simultaneously. The probability of getting a multiple of 2 on one dice and multiple of 3 on the other dice is

For two given vectors \(\bar{a}\) and \(\bar{b}\) if the vectors \(\overline{\mathrm{A}}, \overline{\mathrm{B}}\) are such that \(\overline{\mathrm{A}}+\overline{\mathrm{B}}=\bar{a}, \overline{\mathrm{A}} \times \overline{\mathrm{B}}=\bar{b}\) and \(\overline{\mathrm{A}} \cdot \bar{a}=1\), then \(\overline{\mathrm{A}}=\)

At \(\mathrm{T}(\mathrm{K})\), the RMS velocity of \(\mathrm{He}\) is equal to \(\mathrm{RMS}\) velocity of \(\mathrm{SO}_2\) at \(127^{\circ} \mathrm{C}\). What is \(\mathrm{T}(\) in \(\mathrm{K}) ?\)

Which of the followings is not a state function?

Which of the following has more \(\mathrm{pK}_{\mathrm{a}}\) value?