Explore topic-wise InterviewSolutions in Current Affairs.

Figure 17.5 shows the P - V diagram for a fixed mass of an ideal gas undergoing cyclic process ABCA.AB represents isothermal process. Which of the graphs shown in Fig. 17.6 represents the P - T diagram of the cyclic process ?

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to $3/4$ of the angle of the prism. The angle of deviation is

An electron beam has an aperture $1.0{\text{mm}}^2$. A total of $6.0\times {10}^{16}$ electrons go through any perpendicular cross-section per second. Find $\left(a\right)$ the current and $\left(b\right)$ the current density in the beam.

When photons of energy $hv$ fall on an aluminium plate (work function $E_0)$, photoelectrons of maximum kinetic energy $K$ are ejected. If the frequency of radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

In the figure, if switch $S$ is closed at $t=0$, find the magnitude of charge on the capacitor as a function of time. The inductor is active with initial current $I_0$ in it.

A $60\text{kg}$ weight is dragged on a horizontal surface by a rope upto $2\text{m}$ with constant speed. If the coefficient of friction is $\mu =0.5$, the angle of rope with the surface is ${60}^{\circ }$ and $g=9.8{\text{m/sec}}^2$, then work done by rope on the block is

Two wires $A$ and $B$ of the same cross-sectional areas, Young's modulii $Y_1$ and $Y_2$ and coefficients of linear expansion ${\alpha }_1$ and ${\alpha }_2$ respectively, are joined together and fixed between rigid supports at either ends at $0{}^{\circ }\text{C}$. The tension in the compound wire when wire $A$ is heated to temperature $T_1$ and wire $B$ is cooled to temperature $T_2$ is equal to tension in the compund wire when only wire $A$ is cooled to temperature $T_2$. Find the correct option.

There are $10$ condensers each of capacity $5\mu \text{F}$. The ratio between the maximum and minimum capacity obtained from the condensers will be

If $V_1>V_2$ , $r$ is the resistance offered by the diode in forward bias then current through the diode is

A sealed tube which can withstand a pressure of 3 atmosphere of 3 atmosphere is filled with air at ${27}^0$C and 760 mm pressure. Find the temperature above which it will burst.

Find the distance of centre of mass of a uniform plate having semicircular inner and outer boundaries of radii $a$ and $b$ from the centre $\text{O}$.

1. 43

Two transverse waves passing through a region are represented by $y_1=\left(2\text{cm}\right)\sin \left[\right(2\pi {\text{cm}}^{-1})x-(100\pi {\text{s}}^{-1}\left)t\right]$ and $y_2=\left(3\text{cm}\right)\sin \left[\right(\pi {\text{cm}}^{-1})x-(200\pi {\text{s}}^{-1}\left)t\right]$.
Find the net displacement of the particle at $x=4.5\text{cm}$ and time $t=5\text{ms}$.
[Assume, $\uparrow$ for positive $y-$ direction and $\downarrow$ for negative $y-$ direction]

If an object object contains n_{​​​​​​1} proton and n_{​​​​​​2} ectrons,the net charge on the object is??

Capacitor in the circuit is in steady state along with the current flowing in the branches. The value of each resisatnce is shown in figure. Calculate the energy stored in the capacitor of capacitance $4\mu \text{F}$.

If the wavelength of a radiation is of the order of ${10}^{-15}\text{m}$, then the momentum associated with the photon has an order of -

Two stones are projected so as to reach the same distance from the point of projection on a horizontal surface. The maximum height reached by one exceeds the other by an amount equal to half the sum of the height attained by them. Then, angle of projection of the stone which attains smaller height is

Mass of wedge as shown in figure is M and that of the block is m. Neglecting friction at all the places and mass of the pulley, calculate acceleration of the wedge. Thread is inextensible.

If two waves represented by

$y_1=4\sin \omega t$ , and

$y_2=3\sin (\omega t+\frac{\pi }{3})$

(where $y_1,y_2$ are in $\text{cm}$ and $t$ is in $\text{sec}$),

interfere at a point, the resultant amplitude of that point will be about,

1. 0.017