$A$ thin liquid film formed between a $U$-shaped wire and a light slider supports a weight of $1.5 \times 10^{-2} \, N$ (see figure). The length of the slider is $30 \, cm$ and its weight is negligible. The surface tension of the liquid film is (in $, N/m$)

For the reaction $2H_{(g)} \to H_{2_{(g)}}$,the signs of $\Delta H$ and $\Delta S$ are:

Let $O$ be the vertex and $Q$ be any point on the parabola $x^2 = 8y$. If the point $P$ divides the line segment $OQ$ internally in the ratio $1:3$,then the locus of $P$ is:

The centre of mass of a body

The current-voltage relation of a diode is given by $I = (e^{1000V/T} - 1) \text{ mA}$,where the applied voltage $V$ is in volts and the temperature $T$ is in Kelvin. If a student makes an error of $\mp 0.01 \text{ V}$ while measuring a current of $5 \text{ mA}$ at a temperature of $300 \text{ K}$,what will be the error in the measurement of the current in $\text{ mA}$?

Which of the following statements is correct for diamagnetic materials?