Explore topic-wise InterviewSolutions in Current Affairs.

State Newton's third law of motion. Give an example.

What is the formula for the combination of resistances when they are combined in series and parallel? [2 MARKS]

During winter season, presence of dew drops on leaves is a common site of the gardens. Water is changing the form during formation of dew drops. Which form of water gets converted to which form?

Given 2 resistances, to get the maximum main current with a given voltage, we would:

Two equal and opposite forces whose lines of action do not coincide are said to constitute a __.

What eye defect is hypermetropia? Describe with a ray diagram how this defect of vision can be corrected by using an appropriate lens.

The masses and radii of the earth and moon are$M_1$, $R_1$ and $M_2$, $R_2$ respectively. Their centres are a distance d apart. The minimum speed with which a particle of mass m should be projected from a point midway between the two centres so as to escape to infinity is given by

A wire of resistance 20ohm is bent to form a regular pentagon ABCDE. What will be the resistance between the points A and B?

A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in Figure. The direction of magnetic field at a point will be North to South when the point is _____ .

Refractive index of diamond is 2.42 and that of glass is 1.5. Calculate the critical angle for diamond-glass surface.

What is the purpose of a jack in lifting a car by it ?

The given figure shows an electromagnet

Suggest ways by which the strength of the electromagnet may be increased.

If the sun is the ultimate source of energy, then how can the energy in fossil fuels be said to have come from the sun?

A cart of weight $10N$ is pulled $1.2m$ up a ramp. Force of $5N$ is applied parallel to the ramp. The cart was raised $0.5m$ above its initial level. Calculate the percentage efficiency of the work.

Match the following statements with correct terms associated with it.

$\begin{array}{cc}\text{Statement}& \text{Options}\\ \text{(A)Light makes tiny particles visible due to}& \text{(1)Scattering}\\ \text{scattering.}& \\ \text{(B)The effect of seeing an objects is retained by the}& \text{(2)Dispersion}\\ \text{eye for}\frac{1}{{16}^{th}}\text{of a second.}& \\ \text{(C)Composite light splits up into component}& \text{(3)Persistence of vision}\\ \text{colours.}& \\ \text{(D)Irregular and partial reflection of light}& \text{(4)Tyndall effect}\end{array}$

Statement I : Virtual image cannot be projected on a screen.

Statement II : Divergent rays cannot form a real image.

If $100J/s$ is required for an appliance to run, W is the power consumed, if it operates at $220V$.

The direction of induced current is obtained by Fleming's ___ -hand rule.

A heating coil is arranged inside an iron cylinder of base radius 3.5 m and height 6.5 cm. The radiating surface of the cylinder is

(Take pi=$\frac{22}{7}$ )

Small gaps are left between raiway lines because of ___ of rails during summer.

A ray of light from a denser medium strikes a rarer medium at an angle of incidence $i$ as shown in the figure. The reflected and refracted rays make an angle of ${90}^{\circ }$ with each other. The angles of reflection and refraction are $r$ and $r^{\prime }$. The critical angle is

If the power of a body is given by $P=xv$, where $v$ is the velocity of the body then the dimension of $x$ is

Fill in the following blanks with suitable words:

(a) Magnetic field lines leave the...........pole of a bar magnet and enter at its.........pole.

(b) The earth's magnetic field is rather like that of a ..........magnet with its ........... pole in the northern hemisphere.

Which among the following will conduct electricity?

What type of electric fuse is used in electical appliances like car stereos ? Explain with the help of a labelled diagram.

Explain Domestic electric circuit? [5 MARKS]

What is the principle behind the off and on of a tablet on using the flip cover?

The number of carbon atoms that are present in diesel are

How the earth wire prevents electric shocks?

The pressure difference for movement of wind is created by?

A certain transverse sinusoidal wave of wavelength 20 cm is moving in the positive x direction. The transverse velocity of the particle at x = 0 as a function of time is shown. The amplitude of the motion is:

What is the function of a transformer?

A person is standing 1 km away from a source of sound. If the velocity of sound in the medium is 340 m/s, then calculate the number of oscillations (approximately) that the sound wave makes before it reaches that person. The frequency of the sound is 500 Hz.

A uniform meter rod is balanced in a horizontal position. It is an example of ___

Which of the given statements is incorrect?

An object has a mass of 50 kg. What would be its weight?

[Take acceleration due to gravity $g=10\frac{m}{s^2}$]

Which of the following is an intrinsic semiconductor?

If n equal resistances are first connected in series and then connected in parallel, the ratio of the maximum resistance to the minimum resistance is