Explore topic-wise InterviewSolutions in .

What are the mobile charge carriers in a conductor?

Find the net electric field at an equatorial point $\text{P}$ of a dipole as shown in figure.

A tank full of liquid has an orifice 4.9m below the surface level in the tank. The velocity of out coming liquid is $(g=9.8m/s^2)$

Two identical masses, of mass $m$ each and carrying equal and opposite charges of magnitude $q$, are attached to the ends of a non-conducting uniform rod, of mass $m$ and length $l$. The system is related from rest in uniform electric field, from $\theta ={53}^{\circ }$ as shown in figure. The angular acceleration of the rod, just after release is,

When a fast electron passes near a highly positively charged nucleus, x-rays are seen to get radiated. What could be the cause for this radiation?

The moment of inertia of two spheres of equal masses is equal. If one of the spheres is solid of radius √45 m and the other is a hollow sphere. What is the radius of the hollow sphere?

The velocity - time graph of a body with a constant acceleration is:

A small body of mass $m$ slides without friction from the top of a hemispherical cup of radius $r$ as shown in the following figure. If it leaves the surface of the cup at a vertical distance $h$ below the highest point, then-

Interference pattern is produced in a Young's double slit experiment and a thin piece of plane parallel glass slab $(\mu =1.5)$ is placed in front of one of the slits. If the fringes are displaced through a distance equal the fringe width, find the thickness of the glass slab. Take wavelength of light $\lambda =6000\mathring{\text{A}}$.

Two bodies of masses $m_1$ and $m_2$ are initially at rest at an infinite distance apart. They are then allowed to move towards each other under mutual gravitational attraction. Their relative velocity of approach at a separation distance $r$ between them is

The displacement x of a particle at the instant when its velocity is v is given by $v=\sqrt{3x+16}$. Its acceleration and initial velocity are

1. 525.8146

Let $f\left(x\right)=\underset{0}{\overset{x}{\int }}\frac{{\sin }^{100}t}{{\sin }^{100}t+{\cos }^{100}t}dt$,

then$f\left(2\pi \right)$

Suppose that the electromagnetic wave in vacuum is

$\overrightarrow{E}=\{\left(3.1\frac{N}{C}\right)\cos \left[(1.8\frac{rad}{m}\right)y+(5.4\times {10}^6\frac{rad}{s})t]\hat{i}$

What is the wavelength $\lambda$?

A bullet hits and gets embedded in a solid block resting on a horizontal frictionless table. What is conserved ?

A small block of mass $1kg$ is placed over a plank of mass $2kg$. The length of the plank is $2m$. Coefficient of friction between the block and the plank is $0.5$ and the ground over which plank is placed is smooth. A constant force $F=30N$ is applied on the plank in horizontal direction. The time after which the block will separate from the plank is $(g=10m/s^2)$

A body is dropped from the top of a tower of height $3h$. The ratio of the intervals of time to cover the three equal heights $h$ is

The electric potential varies in space according to the relation $V=3x+4y.$ A particle of mass $0.1kg$ starts from rest from point $(2,3.2)$ under the influence of this field. The charge on the particle is $+1\mu C.$ Assume $V$ and $(x,y)$ are in S.I. units
The time taken to cross the $x$ - axis is

Find the electric field $E$ at point $P$ (as shown in figure) on the perpendicular bisector of a uniformly charged thin wire of length $L$ carrying a charge $Q$.

The distance of the point $P$ from the centre of the rod is $a=\frac{\sqrt{3}}{2}$$L$.

A smooth wedge A is fitted in a chamber hanging from a fixed ceiling near the earth's surface.. A block B placed at the top of the wedge takes time T to slide down the length of the wedge. If the block is placed at the top of the wedge and the cable supporting the chamber is broken at the same instant, the the block will

(a) take a time longer than T to slide down the wedge

(b) take a time shorter than time T to slide down the wedge

(c) remain at the top of the wedge

(d) Jump off the wedge.

The answer is (a).

A disc of moment of inertia $\frac{9.8}{{\pi }^2}{\text{kg m}}^2$ is rotating at $600\text{rpm}$. If the frequency of rotation changes from $600\text{rpm}$ to $300\text{rpm}$, then what is the work done approximately?

An AC source rated $220\text{V}$, $50\text{Hz}$ is connected to a resistor. The time taken by the current to change from its maximum to the rms value is:

Each branch in the following circuit has a resistance $R$. The equivalent resistance of the circuit between two points $A$ and $B$