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.

Three blocks of masses 2 kg, 3 kg and 4 kg are placed one over the other as shown in the figure.Calculate the force exerted by the blocks of mass2 kg and 4 kg on the 3 kg block (g = 10 m/s)2 kg3 kg4 kg​

Answer»

where is FIGURE where is figurw

2.

two forces p and q making an angle of 60degrees with each other at a point . p has magnitude of 8N and magnitude of resultant of two forces is root 84 N. then what will be the magnitude of theta?​

Answer»

Magnitude of force p := 8 NAngle between to forces p and q ;= 60°Magnitude of RESULTANT of the two forces := To Find :Magnitude of resultant angle = ?SOLUTION : ∴We know the FORMULA for resultant of the vectors p and q is :where α is any angle between the two vectors .So now putting the values in this equation we can GET the value of q as :On solving this equation we get q:= 2 NNow for FINDING the value of we take the help of attached fig and proceed as :So finally the magnitude of is .

3.

32. A 2 V cell is connected across a conductor of non- uniform cross section. Out of the followingquantities, which quantities are constant throughout the conductor?[ ]1. Drift speed 2. Current 3. Current density 4. Electric fieldAnhorne anf mass moving with velocity vi enters a region of magnetic field B.; and​

Answer»

i THINK ELECTRIC FIELD

4.

How much force is needed to prevent a body of mass 10kg from falling? (g=10m/s)

Answer»

100NExplanation:F=mg  =10KG*10m/s  =100N

5.

define resistivity write an expression for the resistance of a substance give the meaning of each symbol which occur s in it​

Answer» RESISTIVITY : It is DEFINED as the resistance offered by a cube of a material of side 1 cm when current flows PERPENDICULAR to its opposite faces. Explanation:Resistivity, rho = RA/LWhere; R is resistance of the conductor, A ISS the area of cross section of the conductor and L is the length of the conductor.
6.

an iron ball requires100 j heat energy to raise its temperature by 10celsius. then the heat capacity of iron ball is​

Answer»

specific heat CAPACITY of iron BALL is 100/10= 10 Joule/kilogram kelvinpls follow me and MARK me brainliest

7.

compare the following properties of metals and nonmetals based on physical state ductility metabolic seniority Medi electrical conductivity​

Answer»

metal POSSES ductile and melleable and tensile have good CONDUCTOR of ELECTRICITY but NONMETAL just opposite to

8.

Balancing the following chemical equationsa) NH3+Cl2. N2H4+NH4Cl​

Answer» 4 NH3 + CL2 . N2H4 + 2NH4Cl
9.

What is short sightedness? mention the reason for this defect. name the type of lens used to correct this defect. how does this lens correct the eye defect?

Answer»

Myopia or Nearsightedness occurs when the eye loses its ABILITY to focus on far-off objects as the lenses do not possess a long FOCAL length. Objects that are near are clearly visible to patients of this defect.Reason: it can be INHERITED from the parentsType of lens used to CORRECT:A diverging lens can be used to fix the problem of nearsightedness.earlier the IMAGE was blurry as the light rays were not diverging at the right point and creating a focused image. The rays get focused before it reaches the retina. The convergence of the light rays takes place due to the cornea producing an image on the retina

10.

Suppose a person lying flat on the beach and the rate of absorption of energy from the sun is 500 W. Find the angle of incidence of the sun's rays along the horizontal. (The surface area of ​​the body is 0.8 m², emission = 0.7).​

Answer»

ate of ABSORPTION of energy from the sun = 500 WSurface area of the BODY = 0.8 m²Emission = 0.7To find:Angle of incidence of the sun's rays along the HORIZONTAL.Answer:  = 500 W         where, α = angle of incidence of the sun rays with the horizontal                      e = EMMISIVITY                      A = area                       I = solar energy density = 1000 W/m²   500 = 1000 *0.7 *0.8 cos α         ⇒ α = 26.77 °Angle of incidence of the sun's rays along the horizontal = 26.77 °

11.

Syllabus of NDA 2020 DON'T SPAM ​

Answer» SYLLABUS contain math GK and ability test you can FIND it on GoogleMark as BRAINLIEST please
12.

What is Tyndall effect??​

Answer»

the SCATTERING of light as a light beam passes through a COLLOID. The individual suspension particles scatter and REFLECT light, MAKING the beam visible. ... As with Rayleigh scattering, blue light is SCATTERED more strongly than red light by the

13.

What is igcse past papers

Answer»

it is the past year question PAPERS comissioned by igcse BOARD for board examshope U liked itmark as brainliest

14.

Explain Bernauli Theorem !Don't spamdon't copy otherwise i will report Ur answer!!​

Answer»

Bernoulli theorem states that the total ENERGY per UNIT mass (sum of PRESSURE energy per unit mass kinetic energy per unit mass, potential energy per unit mass ) of an ideal liquid INCOMPRESSIBLE and non viscous liquid is always constant;Explanation:

15.

Hllw....... ❤️what do you mean by Newton's first law ?? explain it with example............​

Answer» TION:first law of Newton is Law of INERTIA in which if a object is in rest it will REMAIN in rest until and unless an external force is applied if it is moving at same speed it will MOVE at same speed until and unless external force is applied
16.

How to average speed on distance- time graph​

Answer»

by DIVIDING it i HOPE that is RIGHT ANSWER

17.

How much charge is moving if 50J of work is carried out through a 3V battery?

Answer» V =W/Q = WORK done/charge then q = W/V = 50/3 = 16.67 C
18.

Consider a wire having initial diameter of 2 mm. Poisson’s ratio for material is 0.5. The longitudinal strain produced in wire is 0.1%. The final diameter of wire is:​

Answer»

nitial diameter, D = 2 mmPoisson's Ratio σ = 0.5Longitudinal Strain, Δl/l = 0.1 % = 0.1 /100 = 0.001To Find :FINAL DiameterCalculation:- POISSON's ratio is given asσ = LATERAL strain / Longitudinal strain ⇒ Lateral Strain = σ × Longitudinal strain⇒ ΔD / D  = σ × Δl/l ⇒ ΔD = σ × Δl/l × D ⇒ ΔD = 0.5 × 0.001 × 2⇒ ΔD = 0.001 MM- Final diameter = Initiat diameter - change in diameter⇒ D' = D - ΔD⇒ D' = 2 - 0.001⇒ D' = 1.999 mm- So the final diameter will be 1.999 mm

19.

Give notes on velocity​

Answer»

hi matethe displacement that occurs in unit time is called velocity velocity = displacement/ timevelocity is a vector quantitythe SI unit is m/sthe distance travelled in a PARTICULAR DIRECTION by an object in unit time is called velocity

20.

A 2kg ball rolls around the edge of a circle with a radius of 1m. If it is rolling at a speed of 3ms, what is the period of the ball?

Answer»

just TELL me it's TOPIC

21.

Volume of a solid is express ed in ml.true or false​

Answer» FALSE (M3)HOPE IT HELPS U....
22.

a spring of spring constant k is cut into three parts of length in ratio1:2:1.the algebric addition of spring constants of these springs will be

Answer»

10k Explanation:The formula for spring constant k=E xA / L where E is the Young's modulus of the material A the sectional area, and L is the length of the ideal spring. It means that spring constant is inversely related to length.Now if cut the spring into three PARTS, INDIVIDUAL parts would have different spring constants which would be;Length of A = 1/4L, means its K would be FOUR times nowLength of B = 2/4L, means its K would be two times nowLength of AC= 1/4L, means its K would be four times nowNow if we sum all these, their sum would be 10 times the original spring constant

23.

The speed of a body moving with uniform acceleration is u. This speed is doubled while covering a distance S. Whenit covers an additional distance S, its speed would become(a) √3u(b) √5u(c) √11u(d) √7u​

Answer»

i THINK SOO the answer is √5Explanation:HOPE it helps u

24.

uniform sphere of mass m and radius R rolls without slipping down an inclined plane set at an angle to the horizontal. Find kinetic energy of sphere t sec after the beginning of motion​

Answer» EXPLANATION:MASS of the BODY is MU =oTime=0 and a=gK. E =
25.

Does the body in uniform circular motion have an acceleration ? What is the direc tion of acceleration.​

Answer» YES it MAY have ACCELERATION . and can can have any DIRECTION
26.

is anybody having lakmir singh and manjit kaur books of class 10 th or 9 th. physics please send me a pic of refraction of light derivation of lens formula

Answer»

This the PIC of 9th CLASS lakhmir SINGH and MANJIT KAUR Explanation:

27.

A ball of mass 600gms strikes a wall with a velocity of 5m/s at an angle 30° with the wall and rebounds with the same speed at the same angle with the wall . The change in moments of the ball is

Answer» LET the ball strike the wall with VELOCITY u =5m/s at an angle 30° with wall.Therefore angle of incidence=60°.Initial MOMENTUM ALONG is NORMAL -mucos60° .Final momentum along normal is mucos60°.Therefore change in momentum is =mucos60° -(-mucos60°).=2mucos60° =2×.6×4×.5=3Kgm/s.Explanation:
28.

find the velocity of charge q when system is released and seperation becomes twice of initial seperation

Answer» NHI AYA. ... ..................................
29.

If a force f is applied on a body and it moves with a velocity V the power will be​

Answer»

Heya✨✨Power = Work/ TIME. Work = Force x displacement So, now Power = Force x displacement / Time. But displacement / Time = velocity ACCORDING to the QUESTION, Force is F and V is velocity so, Power = F x vBut power is a scalar quantity so, we have dot product for power so...... Power = Fv or F.v

30.

Which of the following is not correctly matched?

Answer» OPTION C is answer as it is close plug KEY
31.

Why do we prefer to use 2 thin blankets instead of a thick blanket? ​

Answer»

tion:If TWO thin BLANKETS are covered on a body the air may get trapped in the space between two thin blankets. As we know air is a bad conductor of heat. It does not transfer heat from our body to surroundings. Hence when two thin blankets usually warmer than ONE thick blanketPlease mark me as Brainliest ❤️❤️❤️❤️

32.

A voltage V = 150 + j 180 is applied across an impedance and the currentflowing is found to be 1 =5 - j 4. Determine(i) scalar impedance (ii) resistance (iii)reactance (iv) power consumed.​

Answer»

voltage V = 150 + J 180 I =5 - j 4.To find : (i) scalar impedance (ii) RESISTANCE (iii) reactance Solution : V = I ZZ = V/I=> Z   =  (150 +  j 180  )/(5 - j 4)=  (150 +  j 180  )(5 + j 4) / (5 - j 4)(5 + j 4)= {750 - 720 + j(900 + 600)} / (25 + 16)= (1470 + j 1500)/49Scaler impedance  =  √(1470)² + (1500)² / 49  = 2100/49 = 42.86 ΩResistance = 1470/49  = 30 ΩReactance = 30.61  Ω Learn More:Determine the resonant frequency and magnification factor Q of a ...brainly.in/question/17654067Two inductors of 40mH and 50mH: Calculate a) The total inductance ...brainly.in/question/17592048

33.

The bulk modulus of a gas is 6 × 103 N/m^2 .The additional pressure needed to reduce the volume of the liquid by 10% is:​

Answer»

P = 600 N / m²Explanation:Given : Bulk modulus B = 6 × 10³ N / m²= > Δ V / V × 100 = 10 %= > Δ V / V = 10 / 100= > Δ V / V = 1 / 10= > Δ V / V = 10⁻¹ We know : B = P / ( Δ V / V ) = > P = B × Δ V / VPutting VALUES here we get : = > P = 6 × 10³ × 10⁻¹ = > P = 6 × 10²= > P = 600 N / m²Therefore we get required answer.

34.

Due to what reason does the Diamond Shine​

Answer» REFLECTION, REFRACTION and DISPERSION
35.

The elastic modulus (E) of collagen is 100 MPa, the elastic modulus of elastin is 1 MPa, the strains(ε) are the same for both materials. How many times is stress (σ) arising in collagen greater than stress arising in elastin?

Answer»

IT WILL HELPS YOU.

36.

State and explain distributive law for cross product?​

Answer»

The cross product a × b is DEFINED as a vector c that is perpendicular (ORTHOGONAL) to both a and b, with a DIRECTION given by the right-hand RULE and a magnitude equal to the area of the parallelogram that the VECTORS span......

37.

1. In a curved mirror, a child appears to be 1.00m tall. The child’s actual height is 1.31m. a. What is the magnification of the mirror? b. If the child’s position is 6.0m from the mirror, what is the child’s image position?

Answer» 1 b.6/1.31magnification (m)=HEIGHT of the IMAGE /height of the OBJECT
38.

Plzsolve it and explain it and i need answer with explaining​

Answer» 3) WAVELENGTH is 8CM and FREQUENCY is 4000hz
39.

What do you understand by power , and it's formula and unit?​

Answer»

f an object is the rate of WORK done by the object in UNIT TIME.Power,P = Work done /Time = W/t or Energy /time = E/tIts SI unit is WATT......Mark it as brainliest.

40.

The potential energy function for a particle executing S.H.M. is given by V(x)=0.25x. Show that a particle of total energy 1J moving under this potential must turn back when it reaches x=+ 2m.

Answer»

y the potential energy as a FUNCTION in the displacement x is,At x = ±2 m,This means the particle utilised its WHOLE energy to maintain its potential energy at these points, since the total energy of the particle is 1 J. By total mechanical energy conservation we get that the kinetic energy of the particle is zero at this MOMENT. By total mechanical energy conservation, we have,At This means the velocity of the particle becomes zero here, and hence the particle will not further move forward. Thus it must turn backward since it is under SHM. QED

41.

WHAT IS PROCESS THROUGH WHICH AMOEBA TAKES IN FOOD?​

Answer»

tosis is the PROCESS through which AMOEBA TAKES in FOOD.

42.

Obtain differential equation of L.S.H.M​

Answer»

on a SPRING can be CONSIDERED as the simplest kind of Simple Harmonic Oscillator.With a displacement of x on MASS m , the restoring force on the spring is given by Hooke's law, withing the elastic limit,  F=-kx where k is the spring constant.Newton’s Second law in the x-direction in differential FORM therefore becomes,The above equation represents the differential form of SHM .Here the  spring  force  depends  on  the  distance x,  the  ACCELERATION is  proportional  to the negative of displacement.MARK ME BRAINLIEST ✌✌✌✌✌✌✌✌

43.

What is the definition of one coulomb in terms of v=w/q

Answer»

when 1 JOULE of work is DONE through a potential difference of 1 volt then one coulomb of charge will FLOW through it.Explanation: q= w/v = 1joule / 1volt

44.

2. Complete the relation. (a) Cathode : Negative terminal :: Anode:(b) Heating effect : Bulb:: Chemical effect :(c) Acid: Hydrochloric acid :: Base:​

Answer» TIVE terminal2. Burning3. SODIUM HYDROXIDE ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ Ꮓᴀʀᴀ ❣
45.

Who is the father of science​

Answer» GALILEO GALILEI is the FATHER of SCIENCE
46.

Hola_________________❤_____________ Question : )When same amount of Diamond and Graphite is burnt,which will evolve more heat and why?¿​

Answer»

e will EVOLVE more energy as it is MUCH more thermodynamically stable although the ENTROPY of graphite is more ..but STILL graphite will PRODUCE more energy..

47.

Find Normal forces at all the contact point

Answer»

the NORMAL force is of 20 kg please MARK me as brainliest

48.

Two particles of mass m each are fixed at the opposite ends of a massless rod of length 5m which is oriented vertically on a smooth horizontal surface and released. Find the displacement of the lower mass on the ground when the rod makes an angle of37° with the vertical. (A) 1.5 m(B) 2 m(C) 2.5 m(D) 3.5 m​

Answer»

your ANSWER is A 1.5 m HOPE you LIKED OT

49.

How will u increase turning effect of the force​

Answer»

are used to increase the turning EFFECT of FORCE. IF MY ANSWER IS HELPFULPLEASE MARK IT BRAINLIEST

50.

a projectile is thown up into space so as to have maximum possible horizontal range of 400m taking the point of projection as the origin the co or donated of the point where the velocity is minimum are​

Answer»

I guess U cud GOOGLE this thingExplanation:SIN YA by cos ya = DHANYA