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.

State ohm’s law and what are non-Ohmic conductors

Answer»

Hii frnd here's the answer to the given question


OHMS LAW ➡ The potential difference (voltage) across an ideal conductor is proportional to the current through it.
The constant of proportionality is called the "resistance", R .
Ohm's Law is given by: V = I R

OHMIC CONDUCTORS ➡ Material that obeys Ohm's Law is called " ohmic" or " linear" because the potential difference across it varies linearly with the current.

NON OHMIC CONDUCTORS ➡ Material that doesn'tobeys Ohm's Law is called " Non-ohmic" or " Non - linear".

As it was proved by a SCIENTIST named ohm it is called as ohms law

hope ULL get the answer to the given question and MARK as brainliest one.....

2.

Work function of a metal is 4.2ev .the cutoff wavelength is

Answer» 1472 ARMSTRONG should be the ANSWER.
3.

A body is subjected to two normal stresses 20 kN/m2 (tensile) and 10 kN/m2 (compressive) acting perpendicular to each other. The maximum shear stress is *

Answer» SRY no ANS is the QUESTION CORRECT
4.

The solar spectrum during a complete solar eclipse is [Kerala PET 2002]A) Continuous B) Emission line C) Dark line D) Dark band

Answer» C) DARK LINE is RYT ANS ..
5.

In the formation of a rainbow light from the sun on water droplets undergoes [CBSE PMT 2000; Orissa JEE 2002; MP PET 2003; KCET 2004]A) Dispersion only B) Only total internal reflection C) Dispersion and total internal reflection D) None of these

Answer»

Ans is C) dispersion and TOTAL internal REFLECTION

6.

In the given figure what is the ratio of current in A1 and A2

Answer» ANS in a1 CURRENT is FLOW LIKE 1/2
and in a2current flow 1
7.

What is the Electronic Theory of Frictional Electricity????( Give short answer)

Answer»

In an ATOM the net charge is Zero. In any atom there is a NUCLEUS and electron revolves AROUND it. When nucleus was separated from an atom it was found that the electrons carry NEGATIVE charges. Since, an atom is neutral and electrons are negative so it was concluded that nucleus is positively charged.

Conclusion
1. Every atom CONSIST of equal number of electrons in the orbit which have -ve charge and equal number of protons in the nucleus which have +ve charge. So its net charge is zero.

2. The net charge on one electron is the minimum charge on the particle. Charge on 1 electron is called as a fundamental charge / basic charge.

Fundamental Charge
3. Net charge on an atom is zero due to equal +ve and -ve charges.Nucleus+ve.

4. The excess of electron make the particle negatively charged.

5. The deficiency of electron makes particle positively charged.

8.

Displacement is a which quantity where as distance is which quantity

Answer» DISPLACEMENT is a VECTOR QUANTITY where as DISTANCE is a SCALAR quantity.
9.

A body falls from hieight H and travel 9h/25 in last second find height

Answer»

Let's FIND the start velocity of the last second journey : time t = 1 sec, distance covered s = 9h/25 m

Using the equation : s = ut + 0.5gt^2

9h/25 = u(1) + 0.5*g*(1)^2

u = 9h/25 - g/2

This initial velocity u of the last second is the final velocity v of the journey prior to last sec.

For prior journey : v = 9h/25 - g/2

The start of this prior journey began with u = 0. Our aim is now to find how MUCH distance s’ covered here -

v^2 = u^2 + 2gs’

(9h/25 - g/2)^2 = 0 + 2gs’

s' = (9h/25 - g/2)^2 / 2g

The total height of fall h is given by s' + 9h/25

h = s' + 9h/25

h= ((9h/25 + g/2)^2)/2g + 9h/25

This is a quadratic equation in h/g. Let h/g = y, then

(9y/25)^2 - 41y/25 + 1/4 = 0

Solving this quadratic equation GIVES two values

y1 = 25/2 and y2 = 25/162 (Both valid)

Resubstitute y = h/g

h/g = 25/2 and 25/162

h = 25g/2 and 25g/162

This two HEIGHTS satisfy the condition that in the last second of their respective falls covers 9/25th fraction of their total heights.


mark brainliest

10.

A block with a mass of 30kg is under a force of 100N.Find if the block remains in equilibrium or not

Answer»

The BLOCK REMAINS EQUILIBRIUM

11.

Abc wire drawing co is interested to develop the resistance heating method of

Answer» RESISTANCE WATER because I don't KNOW the ANSWER
12.

A wooden table is considered as a solid because

Answer»

Heya DEAR frnd here is your answer
it is because it has a definite volume with a definite shape
and solid are having definite volume and definite shape
HOPE it will help you

13.

For a prism of refractive index 1.732, the angle of minimum deviation is equal to the angle of the prism. The angle of the prism is [CBSE PMT 2001]A) 80o B) 70o C) 60o D) 50o

Answer»

The ANSWER is 60DEGREES

14.

The spectrum obtained from an electric lamp or red hot heater is [BHU 2001; Pb. PET 2003]A) Line spectrum B) Band spectrum C) Absorption spectrum D) Continuous spectrum

Answer»

The spectrum obtained from an ELECTRIC lamp or RED hot heater is
D) CONTINUOUS spectrum...
But not SURE......

15.

Do in sum12 and answer it

Answer»

How the ANSWER will COME 1:4

16.

2. An electron travelling with a speed of 5 x 103 m/s passes through an electric field with an acceleration of 1012 m /s2. How long will it lake for the electron to double its speed?

Answer»

Dear Student,Please find below the solution to the asked QUERY: Final VELOCITY:v=u+att=v−UA =2u−ua =ua =5×1031012 =5×10−9 sHope this INFORMATION will clear your doubts about Mechanics If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as POSSIBLE

17.

A ball is dropped in a tunnel made through the earth. time taken for it to reach the centre is

Answer»

A few people have already mentioned that under totally unrealistic, very Physics 101 conditions (no friction or air resistance, perfectly spherical Earth with uniform DENSITY throughout), what you throw in will exhibit simple harmonic motion. I think it's a cool derivation, so I'll present it here.
Let G,R,MG,R,M be, respectively, the gravitational constant, Earth's radius, and Earth's mass. Since gravity follows an inverse-square law (ok, not really, but hey, this is Physics 101), we can apply Gauss's Law to a concentric spherical Gaussian surface with radius r≤Rr≤R (for those familiar with Gauss's Law in classical E&M, I'm using mass, 4πG4πG, and gravitational acceleration analogously to charge, ϵ0ϵ0, and electric field). Thus, we find that the gravitational acceleration aa at distance rr from the CENTER of the Earth is 
G(rR)3M(1r2)G(rR)3M(1r2).

Simplifying and adding signs where appropriate, we have
a=−(GMR3)r=−ω2ra=−(GMR3)r=−ω2r. But this is simple harmonic motion, for which the period of oscillation is given as T=ωT=ω. Plugging in values gives us a period of 84.35 minutes, MEANING the object will emerge at the other end of the hole in roughly 42 minutes (what a coincidence!).

HOPE its helps you
do mark brainliest

18.

At what frequencies horn antenna are used?

Answer»

They r USED for UHF and microwave FREQUENCY above 300 HZ

19.

Dispersion of light is due to [DCE 1999]A) Wavelength B) Intensity of light C) Density of medium D) None of these

Answer»

I THINK OPTION B is the ANSWER

20.

Convert 1 joule into cgs

Answer» 1 JOULE =10000000 ERGS = 10^7 ergs
21.

The ratio of Angle of deviation from a thin prism with respect to air and when dipped in water will be?

Answer» U can SEARCH in GOOGLE,can it HELP u
22.

a person going in a train releases the ball from his hand in a vertically upwards direction will the ball fall back or will it come in throwers hand??

Answer» FALL BACK is your ANSWER.
23.

Stars are not visible in the day time because [JIPMER 1997]A) Stars hide behind the sun B) Stars do not reflect sun rays during day C) Stars vanish during the day D) Atmosphere scatters sunlight into a blanket of extreme brightness through which faint stars cannot be visible

Answer» ANSWER is D
mark me BRAINLIEST
24.

Fraunhofer spectrum is a [KCET 1993, 94; RPET 1997; MP PET 1997, 2001; JIPMER 2000; AIIMS 2001]A) Line absorption spectrum B) Band absorption spectrum C) Line emission spectrum D) Band emission spectrum

Answer» B) BAND ABSORPTION SPECTRUM
25.

Which of the following colours suffers maximum deviation in a prism [KCET 1998; DPMT 2000]A) Yellow B) Blue C) Green D) Orange

Answer»

D ORANGE is CORRECT ANSWER

26.

I want sl arora physics solution

Answer»

U can GO to SPECIFIC site

And also refer physics GALAXY channel in youtube

U can find aolutions there

27.

Line spectra are due to [EAMCET (Med.) 1995]A) Hot solids B) Atoms in gaseous state C) Molecules in gaseous state D) Liquid at low temperature

Answer»

I THINK B OPTION is CORRECT

28.

The splitting of white light into several colours on passing through a glass prism is due to [CPMT 1999]A) Refraction B) Reflection C) Interference D) Diffraction

Answer»

(D)DIFFRACTION or DISPERSION.

29.

For a medium, refractive indices for violet, red and yellow are 1.62, 1.52 and 1.55 respectively, then dispersive power of medium will be [RPET 1997]A) 0.65 B) 0.22 C) 0.18 D) 0.02

Answer»

The ANSWER to that QUESTION is (/. C

30.

Dark lines on solar spectrum are due to [EAMCET (Engg.) 1995]A) Lack of certain elements B) Black body radiation C) Absorption of certain wavelengths by outer layers D) Scattering

Answer» DARK LINES on SOLAR SPECTRUM are due to
C) Absorption of certain wavelengths by OUTER layers
31.

A white screen illuminated by green and red light appears to be [KCET 1994; RPMT 1997]A) Green B) Red C) Yellow D) White

Answer»

The ANSWER to that QUESTION is. C

32.

1. A cyclist accelerates uniformly from rest at point A and reaches point Y at a velocity of 9 m/s. The cyclist covers the last 10 m of her ride in 2 s. Determine the acceleration of the cyclist?

Answer»

4 m/s^2 is the acceleration of the cyclist.

Explanation:

Given that,

INITIAL VELOCITY u = 0

v = 9 m/s

s = 10 m

As we know,

v^2 - u^2 = 2as

Thus,

(9)^2 - (0)^2 = 2 * a * 10

81 = 20a

a = 81/20

∵ a = 4.05 m/s^2 or 4 m/s^2

LEARN more: Find the acceleration

brainly.in/question/9655806

33.

1. A cyclist accelerates uniformly from rest at point A and reaches point Y at a velocity of 9 m/s. The cyclist covers the last 10 m of her ride in 2 s. Determine the acceleration of the cyclist.

Answer»

V=9
u=0 t=2
v=u+at
9=0+2a
a=4.5m/s^2

34.

Acceleration due to gravity at surface of earth is g. At what depth, the acceleration due to gravity becomes g/2 , if radius of earth is Re ?

Answer»

Hey DEAR,

● Answer -

DEPTH = Re/2

● Explanation -

LET g' be the acceleration due to GRAVITY at depth d.

g' = g (1 - d/Re)

g/2 = g (1 - d/Re)

1/2 = 1 - d/Re

d/R = 1 - 1/2

d = Re/2

Therefore, acceleration due to gravity will be g/2 at the depth of Re/2.

Hope this helped you.

35.

What is the amount of heat energy required to raise 1kg of lead to 10degree celcius

Answer»

Dear Student
Kindly find the ANSWER of your asked query.
Heat energy = ML+(MCV(∆T))water+(mCv(∆T))iceQ= 777000 JL = Q−(mCv(∆T))water+(mCv(∆T))icemL = 777000−1×4200×(100−(−10))−1×2100×1101=777000−462000−231000=84000 Joule


Hope this INFORMATION will clear your doubt about heat energy.
If you have any doubt do ask on the forum our experts will help you out.

36.

White light is passed through a prism whose angle is 5?. If the refractive indices for rays of red and blue colour are respectively 1.64 and 1.66, the angle of deviation between the two colours will be [MP PET 1997]A) 0.1 degree B) 0.2 degree C) 0.3 degree D) 0.4 degree

Answer»

The answer to question 31, Conditions necessary to observe a rainbow: (1) The SUN should be behind us. (2) It should have rained and the Sun should be present. 




thFor the remaining questions, I request you to post them separately in a different thread so that we will be able to HELP you better.
Regards

37.

A neon sign does not produce [MP PET 1996; UPSEAT 2004]A) Line spectrum B) An emission spectrum C) An absorption spectrum D) Photons

Answer»

EXPLANATION:

an ABSORPTION SPECTRUM

38.

From which source a continuous emission spectrum and a line absorption spectrum are simultaneously obtained [MP PMT 1997]A) Bunsen burner flame B) The sun C) Tube light D) Hot filament of an electric bulb

Answer»

I THINK its a HOT FILAMENT of an ELECTRIC BULB.

39.

A j-k flip-flop with j=1 and k=1. the q output is

Answer»

Any PROBLEM ASK me......

40.

A material is called ductile if its elongation

Answer»

Brittle – a property applicable to a material if fracture occurs soon after the elastic limit is passed 
DUCTILE – a property applicable to a material if a large amount of PLASTIC deformation takes place between the elastic limit and the fracture point 
ductility – the ABILITY of a material to be permanently deformed without BREAKING when the applied load is REMOVED

41.

A ray passes through a prism of angle 60? in minimum deviation position and suffers a deviation of 30?. What is the angle of incidence on the prism [MP PMT 1995; Pb. PMT 2001; RPMT 2003]A) 30? B) 45? C) 60? D) 90?

Answer» RAY PASSES through the pyoerem
42.

Line spectrum contains information about [MP PET 1995]A) The atoms of the prism B) The atoms of the source C) The molecules of the source D) The atoms as well as molecules of the source

Answer»

D)The ATOMS as WELL as MOLECULES of the SOURCE.

43.

A source emits light of wavelength 4700?, 5400 ? and 6500 ?. The light passes through red glass before being tested by a spectrometer. Which wavelength is seen in the spectrum [MP PMT 1995]A) 6500\,\,{\AA} B) 5400\,\,{\AA} C) 4700\,\,{\AA} D) All the above

Answer»

All the above is the ANSWER

44.

At sun rise or sunset, the sun looks more red than at mid-day because [AFMC 1995; Similar to DCE 2003]A) The sun is hottest at these times B) Of the scattering of light C) Of the effects of refraction D) Of the effects of diffraction

Answer»

{B} is the CORRECT ANSWER

45.

Advantages of polymer concrete above other

Answer»

# High RESISTANCE to ABRASION and chemical ATTACK

# REDUCED permeability

# High resistance to FREEZING...

Hope it helps you buddy


46.

The density of iron is 7.8g/cm3 what do you mean by this statement

Answer»

It means that its RELATIVE DENSITY is more than water and will SINK in it
HOPE it HELPS u
plzzz follow me

47.

. Air inside a closed container is saturated with water vapour. The air pressure is p and the saturated vapour pressure of water is If the mixture is compressed to one half of its volume by maintaining temperature constant, the pressure becomes

Answer» CONSTANT because TEMPERATURE is constant
48.

What will be the colour of sky as seen from the earth, if there were no atmosphere [MP PMT 1992]A) Black B) Blue C) Orange D) Red

Answer»

If there was no ATMOSPHERE then light COMING will not REFRACT and COLOUR will not be seen and we will see dark black SKY.

49.

Emission spectrum of C{{O}_{2}}gas [MP PET 1992]A) Is a line spectrum B) Is a band spectrum C) Is a continuous spectrum D) Does not fall in the visible region

Answer»

D) does not FALL in the VISIBLE REGION

50.

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 3/4 of the angle of the prism. The angle of deviation is [MNR 1988; MP PMT 1999; Roorkee 2000; UPSEAT 2000; MP PET 2005]A) 45? B) 39? C) 20? D) 30?

Answer»

Angle of prism is 60 as it is EQUILATERAL triangle
so angle of incidence =3/4*60=45=angle of emergence
by using FORMULA
i+e=A +d
45+45=60+d
d=90-60
d=30