Explore topic-wise InterviewSolutions in Current Affairs.

Some processes are given in Column-I match these with the physical phenomenon given in Column-II.

$\begin{array}{cccc}& \text{Column-I}& & \text{Column-II}\\ \left(i\right)& \text{Nuclear}& \text{(P)}& \text{Conver some}\\ & \text{fusion}& & \text{matter into}\\ & & & \text{energy}\\ \left(ii\right)& \text{Nuclear}& \text{(Q)}& \text{Generally}\\ & \text{fission}& & \text{possible for}\\ & & & \text{nuclei with low}\\ & & & \text{atomic number}\\ \left(iii\right)& \beta -\text{decay}& \text{(R)}& \text{Generally}\\ & & & \text{possible for}\\ & & & \text{nuclei with}\\ & & & \text{higher atomic}\\ & & & \text{number}\\ \left(iv\right)& \text{Pair}& \text{(S)}& \text{Energy is}\\ & \text{annihilation}& & \text{released}\end{array}$

The different power generating stations and distribution systems are connected by a network called :

Which theory is the most accepted theory to explain the origin of universe?

If we obtain a real image of an object on a screen reflected by a concave mirror, then will its image be seen on the mirror itself?

A small bulb is placed at the focal point of a converging lens. When the bulb is switched on, the lens produces : (a) a convergent beam of light (b) a divergent beam of light (c) a parallel beam of light (d) a patch of coloured light

A man is looking at a small object placed at his near point. Without altering the position of his eye or the object, he puts a simple microscope of magnifying power $5X$ before his eyes. The angular magnification achieved is,

A body of mass $2kg$ is dropped from a building of height $5m$. The maximum kinetic energy the body can attain is: (Take $g=10m{s}^{-2}$)

The mass of the Sun is $2\times {10}^{30}\text{kg}$ and that of the Earth is $6\times {10}^{24}\text{kg}.$ If the average distance between the Sun and Earth is $1.5\times {10}^{11}\text{m}$. Calculate the average force exerted by the Sun on the Earth.

A concave lens has focal length $15\text{cm}$. At what distance should the object from the lens be placed so that it forms an image at $10\text{cm}$ from the lens?

Find the amount of electric charge flowing through the circuit if an electric current of 5 A is drawn by an electric appliance for 5 minutes.

How do you define reverberation of sound? Suggest some steps to reduce the reverberation.

Name three factors on which the magnitude of force on a current carrying conductor placed in a magnetic field depends and state how does the force depend on the factors stated by you.

In an experiment of finding the refractive index of glass, if blue light is replaced by the red light, how will the refractive index of glass change? Give reason in support of your answer.

An object is placed at $30cm$ in front of the convex lens of focal length $10cm$. Find out the image distance from lens?

One of the following is not a characteristic of a good fuel. This is:
(a) high calorific value (b) no emission of smoke (c) smooth burning (d) high ignition temperature

Which of the following are not concerns voiced by the 'Narmada Bachao Andolan' against raising the height of the dam?

The charge needed to deposit one gram equivalent of any substance is equal to

The ion of an element has 3 positive charges. The mass number of the atom is 27 and the number of neutrons is 14. Then what is the number of electrons in the ion?

A lens having two spherical surfaces bulging outward is called ______________.

The equivalent resistance of the circuit, as shown in the figure, between points A and B, if $(V_A<V_B)$ is

1. 22

Electric generators convert

The length of a vertical stick at the surface of the lake appears 12cm to a fish under water. If refractive index of water is 4/3 then actual length of stick above water is

Complete the following sentences :

(a) A fuse is a short piece of wire of high ___ and of the material of low ___.

(b) A fuse wire is made of an alloy of ___ and ___ if the current in a circuit exceeds the current rating of the fuse wire, it ___.

(c) A fuse is connected in ___ with the ___ wire.

(d) Higher the current rating, ___ is the fuse wire.

Match the following two columns for a series AC circuit.

When light enters into a human eye which is the first part of eye through which the light passes.

the gravitational force between two point masses $m_1$ and $m_2$ at separation, r is given by

$F=k\frac{m_1{m}_2}{r^2}$
The constant k:
1. Depends on the system of units only

2. Depends on the medium between masses only
3. Depends on both (1) and(2)
4. Is independent of both (1) and (2)

A block and tackle system have VR = 5. Rohan exerts a pull of 150 kgf. What is the maximum load he can raise with his pulley system if its efficiency = 75%?