Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Electromagnetic waves produced by bombard ment of high energy electrons on a metal target is ________ .

Answer» X RAY is UR ANSWER...........
2.

Speed of electromagnetic wave related to electric field and magnetic field vector in vacuum.

Answer» KARSH PRATHAMYour answer is hereElectromagnetic waves. E(x,t) = Emaxcos(kx - ωt + φ), B(x,t) = Bmaxcos(kx - ωt + φ). E is the electric field vector, and B is the magnetic field vector of the EM WAVE. ... The speed of any electromagnetic waves in FREE space is the speed of light c = 3*108 m/s.It was from the max plank Rember not Maxwell
3.

Displacement current across a capacitor is ________ to conduction current in connecting wires.

Answer»

Co GO last night and one animal eats and DRINKS and then it gets RUSTED out of the office today but it was UNABLE to attend the INTERVIEW on the office phone number is your house

4.

Any answer of this question

Answer»

Which ❓please TELL your QUESTION

5.

Which of the following statement is false for the properties of em waves? (a) The energy of em wave is divided equally between electric and magnetic fields. (b) Both electric and magnetic field vectors are parallel to each and perpendicular to the direction of propagation of wave. (c) These waves do not require any material medium for propagation. (d) Both electric and magnetic field vectors attain the maximum and minimum at the same place and same time.

Answer»

they were GOING on with this please make me a very hard time then it GETS rusted out of the office TODAY but will be in the office today but will be in the office today but will be BACK in the office tomorrow and will be

6.

The ratio of contributions made by the electric field and magnetic field components to the intensity of an EM wave is [NCERT Exemplar] (a) c : 1 (6) c² : 1 (c) 1 : 1 (d) √c : 1

Answer»

It means the ratio of CONTRIBUTIONS by the electric field and magnetic field components to the INTENSITY of an electromagnetic wave is 1:1. When the INCIDENT EM wave is completely absorbed by a surface, it delivers energy u and MOMENTUM u/c to the surface.

7.

What will be the total equivalent resistance in given diagram:​

Answer»

3R/4 Explanation:To answer this question ; We will KEEP MODIFYING the circuit diagram according to our convenience. so here's the solution :- HOPE it helps !!Feel free to CATCH me up on FACEBOOK and twitter.

8.

Write rules for how to use the rule or scales to measure distance

Answer» TION:If the SCALE is a verbal statement (i.e. "1 inch EQUALS 1 mile"), determine the distance by simply measuring it with a ruler. For example, if the scale says 1 inch = 1 mile, then for every inch between the two points on the map, the real distance on the ground is that NUMBER in miles.
9.

Electromagnetic waves are produced by ________ electric charge.

Answer» MAGNETIC is UR ANSWER..
10.

Displacement current is produced in the region of changing ________ .

Answer» BODY ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
11.

Electromagnetic waves possess both ________ and ________ .

Answer»

Ngitudinal and TRANSVERSE is the ANSWER

12.

An EM wave of intensity I falls on a surface kept in vacuum and exerts radiation pressure p on it. Which of the following is not true? [NCERT Exemplar] (a) Radiation pressure is I/c if the wave is totally absorbed. (b) Radiation pressure is I/c if the wave is totally reflected. (c) Radiation pressure is 2I/c if the wave is totally reflected. (d) Radiation pressure is in the range I/c < p < 2I/c for real surfaces.

Answer»

tion:ccvccg and ONE animal eats and drinks and then I will mark it down and all the best for the NEW YEAR and I will mark you down for LONG time then I will mark PLEASE mark me brainliest

13.

Write the relational between farad, Coulomb & Volt?​

Answer»

One FARAD is defined as the capacitance across which, when CHARGED with one COULOMB, there is a POTENTIAL difference of one volt. Equally, one farad can be described as the capacitance which stores a one-coulomb charge across a potential difference of one volt.

14.

This is a question of physics​

Answer» SPEED 20 is the ANSWER of this QUESTION
15.

What is ammeter Debsksksblxosllsnijzbkzjzuxndjshsoxjhsixhxnxjdnskbskzhzjxjnxjdvvsnzbdxjbdbxjsb

Answer»

An instrument for measuring ELECTRIC current in amperes is CALLED ammeter.Hope it HELPS!!!Please MARK as brainlist....

16.

The common fuel used in nuclear reactor is​

Answer»

-235Nuclear fuel is the fuel that is used in a NUCLEAR reactor to sustain a nuclear chain reaction. These fuels are fissile, and the most common nuclear fuels are the RADIOACTIVE metals uranium-235 and plutonium-239.Hope it helps......PLS MARK it brainlist If it helps.....☺️☺️

17.

Equivalent resistance :on notebook please​

Answer»

this is the ANSWER to your QUESTION

18.

The total number of air molecules in a room of capacity 20m3 at a temperature of27degree and 1atm pressure is ​

Answer»

Search ResultsFeatured snippet from the web6:- Estimate the total number of air MOLECULES (inclusive of oxygen, NITROGEN, water VAPOUR and other constituents) in a room of capacity 25.0 m3 at a temperature of 27 °C and 1 atm pressure. Therefore, the total number of air molecules in the given room is 6.11 × 1026.www.tutionteacher.in › estimate-tota...Estimate the total number of air molecules (inclusive of oxygen ... - TUTION TeacherFeedbackAbout Featured SnippetsPage Navigation

19.

What is total equivalent resistance in this problem. full explanation please​

Answer»

Since I have made EFFECT for answering U please MARK my ANSWER as brainlyestExplanation:

20.

A given force displaces an object through a distance s in its own direction and then in a direction 60degree to its own direction find the ratio of work done ​

Answer»

grvccçcwwçwwcwvwbweve

21.

Judge the equivalent resistance when 3 ohm and 12 ohm are connected in parallel ​k

Answer»

the EQUIVALENT RESISTANCE in PARALLEL is 2.4ohmsExplanation:we can calculate the equivalent resistance in parallel as 1/Req= 1/R1+1/R2 THUS 1/Req = 1/3+1/12 = (4+1)/12 = 5/12since 1/Req = 5/12therefore Req= 12/5 =2.4 ohmsplease mark as the BRAINLIEST

22.

Explain how the atomic energy levels split into bands when a number of atoms are brought close together to form a crystal​

Answer»

Due to the Pauli EXCLUSION Principle each atomic orbital SPLITS into N MOLECULAR orbitals each with a different energy, where N is the number of atoms in the crystal. Since N is such a large number, ADJACENT orbitals are extremely close TOGETHER in energy so the orbitals can be considered a continuous energy band

23.

What is a concave lens and a convex lens​

Answer»

A convex lens or converging lens focuses the light RAYS to a specific point whereas a concave lens or diverging lens diverges the light rays. ... Concave lenses and convex lenses are often used TOGETHER with known as Concave – Convex lens. When these lenses are combined they PRODUCE sharper IMAGES.

24.

Calculate the mass (in kg) of 245cm³ of concrete if the density of concrete is 2400 kg/cm³. Give answer to 2 decimal places.

Answer» HOPE it HELPS YOUPLEASE MARK BRAINLIEST
25.

If a multiple allelic gene contains six alleles in the population, the possiblegenotypes in population will be :1) 122) 14623) 214) 24​

Answer»

Allele FREQUENCY refers to how common an allele is in a POPULATION. It is determined by counting how many TIMES the allele appears in the population then DIVIDING by the total number of COPIES of the gene.

26.

Differentiate mass and weight​

Answer»

mass is a AMOUNT of MATTER in a material.weight is a MEASURE of how the FORCE of gravity ACTS on mass.....

27.

Which graph a or B represents higher velocity in theginen figure and why?O Displacement​

Answer» GRAPH B REPRESENTS HIGHER VELOCITY.
28.

Why are traffic signal red in colour?

Answer»

because RED COLOUR is EASY too SEE so it's Red in colour

29.

Block is kept on another block . There is friction between and but the ground surface is smooth. A boy starts applying a horizontal pushing force on which increases linearly with time increasing from zero. Acceleration of has been represented by 1 and that of is represented by 2 in the graphs shown below. Which graph correctly represents the variation of acceleration with time is Description: PHY - P- I - Q -2.jpg

Answer» WINNER winner CHICKEN DINNER .............
30.

अ��र वेग के लिये विस्थापन-समय ग्राफ की ढाल से कौन-सी राशि ज्ञात होती है- वस्तु द्वारा तय की गयी कुल दूरी या वस्तु का वेग?

Answer»

विस्थापन (अंग्रेज़ी: DISPLACEMENT) एक सदिश राशि है। जब कोई वस्तु एक बिन्दु P से दूसरे बिन्दु Q तक किसी भी पथ से होते हुए गति करती है तो इस विस्थापन [1] का परिमाण उन दो बिन्दुओं के मध्य की निम्नतम दूरी होगी तथा विस्थापन की दिशा, रेखा PQ की दिशा में (P से Q की तरफ) होगी।[2] विस्थापन को s से दर्शाते हैं। विस्थापन का परिमाण काल्पनिक सीधे पथ की लम्बाई है, अतः यह कण द्वारा तय की गई कुल दूरी से अलग हो सकता है। जब कोई वस्तु p बिन्दु से q बिन्दु तक जाती है और वापस पुनः p बिन्दु आ जाती हैं, तब विस्थापन शून्य होगा, जबकि चली गयी दूरी शून्य नहीं होगी।

31.

The resistsnce of a wire is 10 ohm its length is increased by 10% by stretching . The new resistance will now be

Answer» EXPLANATION:Handy trickIf the QUESTION doesn't gives clue about CHANGE in volume.The NEW resistance = { 1+(x/100)}^2 of Initial resistance , where x= the increment percent.Here in ur ques , x= 10% and R= 10 ohmTherefore, the new resistance ={1+(10/100)}^2 ×10= { 110/100}^2 × 10= 12.1 ohm
32.

We have given house with height=H and a stone is thrown straight. At the height=H/3 , speed of stone is 10√2 find total height of house

Answer»

From the third equation of the  MOTION, v2=u2+2aS, it can be SAID that whether the stone is thrown VERTICALLY upwards,downwards or horizontally it will hit the ground with the same SPEED as acceleration due to gravity is constant everywhere. So the speed does not depend on the initial direction. Explanation:please mark me as brainlest and follow

33.

One requires 11 eV of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in [NCERT Exemplar] (a) visible region. (b) infrared region. (c) ultraviolet region. (d) microwave region.

Answer»

(C) (c) ULTRAVIOLET region.Explanation:DON'T FORGET TO MARK ME AS BRAINLIST

34.

A charged particle oscillates about its mean equilibrium position with a frequency of 109 Hz. For producing electromagnetic waves which one is not true? (a) They will have frequency of 109 Hz. (b) They will have frequency of 2 × 109 Hz. (c) They will have a wavelength of 0.3 m. (d) They fall in the region of radio waves.

Answer»

D)They FALL in region of RADIO wavesExplanation:DON'T FORGET TO MARK ME AS BRAINLIST

35.

An electromognetic wave travels in vacuum along z direction: E = (E{i + E2j) cos(kz – cot). Choose the correct optinons from the following: (c) The given electromagnetic field is circularly polarised. (d) The given electromagnetic wave is unpolarised.

Answer»

Parallel Polarization (Transverse Magnetic) – Meanwhile, parallel polarization is the opposite. This occurs when the electric fiels is parallel to the plane of incidence and the magnetic field is PERPENDICULAR. This is also KNOWN as 'P-polarized' light.Apr 18, 2018Explanation:The polarization of an electromagnetic WAVE FOLLOWS the direction of the electric field. For example, if the electric component is oscillating along the x-axis and the magnetic field is oscillating in the y-axis, the polarization will be along the x-axis.Oct 13, 2014

36.

A plane electromagnetic wave propagating along x direction can have the following pairs of Eand B (a) Ex,By. (b) Ey, Bz. (c) Bx, Ey. (d) None of these

Answer»

(B) EY and Bzsince both field will be PERPENDICULAR to the direction of the PROPAGATION of WAVE.

37.

An EM wave radiates outwards from a dipole antenna, with E0 as the amplitude of its electric field vector. The electric field E0 which transports significant energy from the [NCERT Exemplar]

Answer»

From a dipole antenna, the em wave are radiated OUTWARDS. The amplitude of ELECTRIC field vector (E0)which transport SIGNIFICANT energy from the source falls off the electric intensity inversely as thedistance R from the antenna, i.e., E0∝1/r.

38.

Light with an energy flux of 20 W/cm2 falls on a non-reflecting surface at normal incidence. If the surface has an area of 30 cm2, the total momentum delivered (for complete absorption) during 30 minutes is , [NCERT Exemplar] (a) 36 × 10-5 kg m/s. (b) 36 × 10-4 kg m/s. (c) 108 × 104 kgm/s. (d) 1.08 × 107 kg m/s.

Answer»

In CASE of PERFECTLY NON REFLECTING SURFACE, Δp=E/c where e=20×30×30×60 =1.08×106j Δp=1.08×10^6/3×10^8 36×10^−4kg−m/s.

39.

A linearly polarized electromagnetic wave given as E = E0 \hat{i} cos (kz – ωt) is incident normally on a perfectly reflecting infinite wall at z = a. Assuming that the material of the wall is optically inactive, the reflected wave will be given as [NCERT Exemplar] (a) Er = -E0 \hat{i} cos (kz – ωt). (b) Er = E0 \hat{i} cos (kz + ωt). (c) Er = -E0 \hat{i} cos (kz + ωt). (d) Er = E0 \hat{i} sin (kz – ωt).

Answer»

When a WAVE is reflected from DENSER medium, the reflected wave is without CHANGE in TYPE of wave but with a change in phase by 180∘ or π radian. THEREFORE, for the reflected wave we use z=−z,iˆ=−iˆ and additional phase of π in the incident wave. The incident em wave is, E=E0iˆcos(kz−ωt) The reflected em wave is Er=E0(−iˆ)cos[k(−z)−ωt+π]=−E0iˆcos[−(kz−ωt)+π] =E0iˆcos[−(kz−ωt)][∵cos(θ+π)=−cosθ] =E0iˆcos(kz+ωt)[∵cos(−θ)=cosθ]

40.

The waves used by artificial satellites for communication is (a) microwaves (b) infrared waves (c) radio waves (d) X-rays

Answer»

hey mate here's UR answerExplanation: It is RADIO wavesPLZZ MARK ME AS BRAINLIST☺

41.

The source of electromagnetic waves can be a charge (a) moving with a constant velocity. (b) moving in a circular orbit. (c) at rest. (d) falling in a magnetic field.

Answer»

b) moving with CIRCULAR objecthope U can understandPlease MARK as BRAINLIEST

42.

An electromagnetic wave travelling along z-axis is given as-E=E0 cos (kz – cot). Choose the incorrect option from the following; (a) The associated magnetic field is given as B = \frac{1}{c}\hat{k} × E = \frac{1}{\omega}(\hat{k} × E) (b) The electromagnetic field can be written in terms of the associated magnetic field as E = c(B × \hat{k}) (c) \hat{k}.E = 0, \hat{k}.B =0. (d) \hat{k} × E = 0, k\hat{k} × B = 0.

Answer»

"}{\" (and any SUBSEQUENT words) was ignored because we LIMIT queries to 32 words

43.

The electric field intensity produced by the radiations coming from 100 W bulb at a 3 m distance is E. The electric field intensity produced by the radiations coming from 50 W bulb at the same distance is [NCERT Exemplar]

Answer»

The electric FIELD intensity produced by the radiations coming from a 100 W BULB at a 3 m distance is E. The electric field intensity produced by the radiations ...

44.

Sunlight scattered by a cloud is 1) Plane polarized 2) Partially polarized 3) Some times plane polarized 4) None of these

Answer»

tion:This is why clouds are WHITE (with some shades of GREY mixed in if the CLOUD is thick). When you look up at a cloud you see a white cloud (SUNLIGHT being SCATTERED by cloud droplets) surrounded by blue sky (sunlight being scattered by air molecules

45.

Name and describe the two branches of fluid mechanics used in physics??​

Answer»

re two major branches in fluid mechanics, NAMELY, fluid statics which is the STUDY of fluid in a stationary state and fluid DYNAMICS which is the study of fluid when its flowing, like what happens when WATER flows? So lets dive into fluid mechanics.

46.

Thickness of walls of a dam is increased at bottom why?​

Answer» TION:You can see from the diagram that the dam is much thicker at the bottom than it is at the top. This is because the pressure of the WATER is much greater deeper down and the dam needs to be thick at the bottom so that it is strong enough to withstand this larger pressure.You can have a LOOK at this imagehttps://images.app.goo.gl/3asy3QPoXrBbDdFh8Please mark this ANSWER as BRAINLIEST
47.

Thinkness of walls of adam is increased towards bottom why?​

Answer»

The wall of dam is MADE THICKER at the BOTTOM because PRESSURE exerted by a liquid increases with Depth . Thus as depth increases more and more pressure is exerted by water on the walls of dam .

48.

Judge the equivalent resistance when 1ohm and 100ohm are connected in parallel​

Answer»

1/Rp=1/R1+1/R21/Rp=1/1+1/100=100+1/100=101/100=1.01ohmExplanation:

49.

compare the path length of an object between two points with that of magnitude of displacement between the same two points​

Answer»

Distance is the actual LENGTH of the path covered by SOMEONE or something, but displacement is the length of the shortest route between the STARTING and ending points. So, displacement is either equal to or less than the distance between two points.plz FOLLOW me and mark as brainliest

50.

2. The direction of the induced emf during electromagnetic inductionis determined by(a) Ampere's law (b) Lenz's law(c) Faraday's law (d) Maxwell's law​

Answer» OPTION B Lenz LAW EXPLAINS direction in EMI