Explore topic-wise InterviewSolutions in Current Affairs.

Find the velocity of the end $B$ of the rigid rod if that of the end $A$ is $V_0$.

For the given charge distribution, net electric field at the centre of non-conducting ring is

(Assume that charge on first quadrant is neutral, second and third quadrant is positively charged, fourth quadrant is negatively charged )

The resistance of a wire is $4.2\Omega$ at ${100}^{\circ }C$ and the temperature coefficient of the material is $0.004{/}^{\circ }C$. Its resistance at $0^{\circ }C$ is

Two large vertical and parallel metal plates having a separation of $1cm$ are connected to a $DC$ voltage source of potential difference $X$. A proton is released at rest midwa between the two plates. It is found to move at ${45}^o$ to the vertical JUST after release. Then $X$ is nearly

A ball is dropped from height $h$ on a floor. If the coefficient of restitution is $e$, find the total distance covered by the ball before coming to rest on the ground.

A police jeep travelling at a speed of $45\text{km/h}$ is chasing a thief's car moving at a speed of $153\text{km/h}$. If police fire a bullet with a muzzle velocity of $180\text{m/s}$, the velocity with which it strikes the thief's car is

If the ionization energy of the hydrogen atom is $13.6\text{eV}$, then the energy required to remove the electron from the first excited state of ${\text{Li}}^{2+}$ is

The trajectory of a projectile is given by the equation $y=x-x^2$. What is the value of the initial velocity and the angle of projection?

If velocity of a particle is $v\left(t\right)=6t^2\text{m/s}$, the average speed of the particle in $6\text{sec}$ is

A particle having mass $m$ is projected with a speed $v$ at an angle $\alpha$ with the horizontal ground. Find the torque of the weight of the particle about the point of projection when the particle reaches the ground.

A and B are two vectors in a plane at an angle of ${60}^{\circ }$ with each other. C is another vector perpendicular to the plane containing vectors A and B. which of the following relations is/are possible?

When the angle of incidence on a material is ${60}^{\circ }$, the reflected light is completely polarized. The velocity of the refracted ray inside the material is $(\text{in m/s}$)

The particle P shown in figure (31-E11) has a mass of 10 mg and a charge of $-0.01\mu C.$ Each plate has a surface area $100c{m}^2$ on one side. What potential difference V should be applied to the combination to bold the particle P in equilibrium ?

A point source of light is used in a photoelectric effect. If the source is removed farther from the emitting metal, the stopping potential :

Find the equivalent inductance in the combination given below between points $\text{A}$ and $\text{B}$.

$\int e^x\left[\frac{1+\sin x}{1+\cos x}\right]dx$ is equal to

(where $c$ is integration constant)

Eleven identical rods are arranged as shown in figure. Each rod has length $L$, cross-sectional area $A$ and thermal conductivity of material $K$. Ends A and F are maintained at temperatures $T_1$ and $T_2(T_2<T_1)$ respectively. If lateral surface of each rod is thermally insulated, the rate of heat transfer$\left(\frac{dQ}{dt}\right)$ in each rod is

A plot of $\text{log}\frac{x}{m}$ vs. $\text{log p}$ for adsorption of a gas on to a solid gives us a straight line with slope equal to:

A balloon is moving upwards with a speed of $20\text{m/s}$. When it is at a height of $14\text{m}$ from the ground in front of a plane mirror as shown in figure, a boy drops himself from the balloon. Find the time duration for which he will see the image of source $S$ placed symmetrically before the plane mirror during free fall. Take $g=10{\text{m/s}}^2$.

A container filled with a viscous liquid is moving vertically downwards with a constant speed $3v_0$. At the instant shown, a sphere of radius $r$ is moving vertically downwards (in liquid) has speed $v_0$. There is no relative motion between fluid and container. The coefficient of viscosity is $\eta$. Then at the shown instant, the magnitude of viscous force acting on sphere is

In the figure shown below, $R_1=1\Omega ,R_2=2\Omega ,C_1=4\mu \text{F},C_2=2\mu \text{F}$ , the time constants (in $\mu \text{s}$) for the circuits $I,II$ and $III$ respectively are

A particle projected with an initial velocity $u$ at angle $\theta$ from the ground. What is the work done by gravity during the time it reaches the highest point $\left(P\right)$ in its path

All the curves in Column 1 are parabolic and those in Column 2 and Column 3 are straight lines.

‘x’, ‘v’ and ‘a’ denote position, velocity and acceleration of a particle and consider positive in the direction of increasing ‘x’.

In which one of the following options the particle starts with positive velocity and crosses the origin with negative velocity?

A galvanometer with internal resistance $100\Omega$ and full-scale current 1 mA is used to realize a dc voltmeter with a full scale range of 1 V. The full scale range of this voltmeter can be extended to 10 V by connecting an external resistance of value

Which of the following relation represents the minimum work input required in a multi-stage reciprocating compressor with perfect intercooling?

Where N is the number of stages and n is the polytropic index of compression

The velocity at the maximum height of a projectile is $\frac{\sqrt{3}}{2}$ times its initial velocity of projection $\left(u\right)$. Its range on the horizontal plane is

An $LVDT$ has an output of $10mV$ across its terminals when the core moves through a distance of $4mm.$ The output of this LVDT is connected to a $10V$ voltmeter through an amplifier of gain $1000.$ If the milli-voltmeter scale has $100$ divisions and scale can read upto $1/5$ of a division. Then the resolution of the overall setup is ____.

Find the resistance between the points $A$ and $B$ .

A stone is dropped from a height $h$. Another stone is thrown up simultaneously from the ground, which can reach to maximum height of $4h$. The two stones will cross each other after time