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. |
A potentiometer wire of length 5m is connected to a battery for a certain cell having negligible resistance the null point is obtained at 250cm if length of potentiometer wire is increased by 1m where will be the new position of the null point? |
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Answer» null point will be obtained at 300 cm.Explanation : The initial length of POTENTIOMETER wire = 5 mFinal length of potentiometer wire = 5+1 = 6 mInitial BALANCE point = 250 cm = 2.5 MWE know that in a potentiometer the balance point is directly proportional to the length of the wire,=> N/2.5 = 6/5=> N = 6/5 x 2.5 = 3 m = 300 cmHence the new null point will be obtained at 300 cm. |
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| 2. |
What does the slope of velocity Time graph tell us |
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Answer» ning of Slope for a v-t GRAPH. As discussed in the previous part of Lesson 4, the shape of a velocity versus time graph reveals pertinent information about an OBJECT's acceleration. For example, if the acceleration is ZERO, then the velocity-time graph is a HORIZONTAL LINE (i.e., the slope is zero).Mark as brainliest if it helps u dear ┏─━─━─━─━∞◆∞━─━─━─━─┓ ✭✮ ӇƠƤЄ ƖƬ ӇЄԼƤ MƛƳ ƳƠƲ ✭✮ MARK AS BRAINLIST ┗─━─━─━─━∞◆∞━─━─━─━─┛ |
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| 3. |
Why carbon is important in development of nano technology |
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Answer» also plays a vital role in nanotechnology research and nanotechnology applications. Carbon is a non-metallic element present in the cells of organisms. ... Carbon makes about 19 percent of the HUMAN body MASS and is an IMPORTANT component of fats, proteins, nucleic acids, and carbohydrates.MARK as brainliest if it helps u dear ┏─━─━─━─━∞◆∞━─━─━─━─┓ ✭✮ ӇƠƤЄ ƖƬ ӇЄԼƤ MƛƳ ƳƠƲ ✭✮ MARK AS BRAINLIST ┗─━─━─━─━∞◆∞━─━─━─━─┛ |
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| 4. |
In a meter bridge the null point is found at a distance of 33.7c.M from a of the wire. If now a resistance of 12 ohm is connected in parallel with s the null point occurs at 51.9c.M determine the values of r and s. |
| Answer» UE of r and s are 6.84Ω and 13.47 Ω respectively.Explanation : From the 1st balance point we get,r/s = 33.7/66.3=> r = 33.7s/66.3After 12Ω resistance is added in parallel with s, EQUIVALENT resistance will become,s₁ = s||12=> s₁ = 12S/(12+s)From the 2nd balance point,r/s₁ = 51.9/48.1=> r = s₁ x 51.9/48.1=> r = 12s/(12+s) x 51.9/48.1=> 33.7s/66.3 = 12s/(12+s) x 51.9/48.1=> 12 + s = (12 x 51.9 x 66.3)/(33.7 x 48.1)=> 12 + s = 25.47=> s = 13.47 Ωputting the value of s in the FIRST eqnr = s x 33.7/66.3=> r = 13.47 x 33.7/66.3=> r = 6.84ΩHence the value of r and s are 6.84Ω and 13.47 Ω respectively. | |
| 5. |
Hi Guys ☺ #Some_Question_From_Fluids (Class 11th) ◘ Prove Bernoulli's Theorem! ♣ Prove Equation Of Continuity! ♠ What is Stream Line Flow? ♦ Quality Needed ♦ Don't Copy |
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Answer» _________________________It states that when a non - Viscous LIQUID and INCOMPRESSIBLE liquid flows through a TUBE of non - uniform cross section area, then at each point, the total energy of the liquid ( Kinetic + Potential + Pressure energy ) per unit volume will remain constant. P + ρ v² + ρgh = constant :Consider an ideal liquid of density ρ,is flowing through the tube in streamline flow, then the force experienced by the liquid enters at the END in time t, F₁ = P₁ A₂Work done on the liquid at end X, W₁ = F₁ × v ₁ ∆tW₁ = P₁ A₁ ( v ₁ ∆t ) W₁ = P₁ ∆v₁ Similarly, work done by the liquid at end Y, W₂ = P₂ ∆v₂Net work done on the liquid, W = ( P₁ ∆v₁ ) - ( P₂ ∆v₂ ) From equation of continuity, A₁ V₁ = A₂ V₂ A₁ V₁ ∆t = A₂ V₂ ∆t∆v₁ = ∆v₂W = ( P₁ - P₂ ) ∆vW = ( P₁ - P₂ ) ---> ( i ) Kinetic Energy, ∆K = mv₂ ² - mv₁² Potential Energy, ∆P = mgh₂ - mgh₁Total energy of the liquid, ∆E = ∆K + ∆P ∆E = ( mv₂ ² - mv₁² ) + ( mgh₂ - mgh₁ ) From the law of conservation of energy, W = ∆E( P₁ - P₂ ) = ( mv₂² - mv₁² ) + ( mgh₂ - mgh₁ )( P₁ - P₂ ) = ρv₂² - frac{1}{2} ρv₁² + ρgh₂ -ρgh₁ P₁ + ρv₁² +ρgh₁ = P₂ + ρv₂² + ρgh₂ P + ρv² +ρgh = constant. _______________________________It states that during the streamlined flow of an ideal liquid ( incompressible, no-Viscous) through a pipe of varying Cross section, the product of area of cross - section and velocity of flow remains constant. AV = constant :Consider a liquid of density ρ flows through the tube XY, then volume of liquid enters at end v₁ = A₁v₁∆t and mass of the liquid enters at end X₁,m₁ = A₁v₁ ∆t ρSimilarly, mass of liquid going out through end y, m₂ = A₂ v₂ ∆t ρ According to law of conservation of mass, m₁ = m₂ A₁v₁ ∆t ρ = A₂ v₂ ∆t ρ A₁v₁ = A₂ v₂ AV = constant. _______________________________It is the flow of liquid in which each particle of the liquid passing through a point travels along the same path and with same velocity as the preceding particle passing through the same point. _______________________________ |
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| 6. |
यदि एक दर्जन पेन की कीमत रु 180 हैं, तो 1 पेन की कीमत होगी? |
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Answer» have12 pensso 12pens COST 180thus180/12=15thus 1 pen COSTS 15plz MARK brainliest |
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| 7. |
How many types of lever are there?explain |
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Answer» re THREE types or classes of levers, ACCORDING to where the LOAD and effort are located with respect to the FULCRUM. Class 1 has the fulcrumplaced between the effort and load, Class 2 has the load in-between the effort and the fulcrum, and Class 3 has the effort between the load and the fulcrum.hope it helpsplz mark brainliest |
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| 8. |
At a football tryout, a player runs at 40 yards dash |
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Answer» to do NEXT...it SEEMS the QUESTION is INCOMPLETE |
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| 9. |
Write in brief introduction about household cicuit |
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Answer» ld circuit is an electrical system that basically CONTROLS the flows of electricity at ourhouse . In our house, the more things that are turned on, the more current is requested . Thus themeter in the meter box ticks over quicker and it costs us more money.The electrical service in our house is divided into branch circuits, each of which SUPPLIES powerto every area of our house. It is important to make sure that no branch circuit is carrying too greatload or it will cause us a problem to reset breakers or replacing fuses. Some APPLIANCES need tohave a circuit for themselves.A well-planned electrical system will have branch circuits that serve easily every AREAS or purposes.hope it helpsplz MARK brainliest... |
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| 10. |
Introduction and definition of reverberation in physics |
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Answer» ration, in psychoacoustics and ACOUSTICS, is a persistence of sound after the sound is produced.A reverberation, or reverb, is created when a sound or signal is reflected causing a large NUMBER of reflections to BUILD up and then decay as the sound is absorbed by the surfaces of objects in the space – which could INCLUDE furniture, people, and air. This is most noticeable when the sound source stops but the reflectionscontinue, decreasing in amplitude, until they reach ZERO amplitude.hope it helpsplz mark brainliest |
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| 11. |
Tell me the different between Stationary wave and Progressive wave. don't copied answer from google please give me correct answer |
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Answer» odic motion is executed by EVERY PARTICLE of the medium. 2. The amplitude of each particle of the medium is same. 3. The distance between 2 SUCCESSIVE crests of a transverse wave is a wavelength.___________________1. Periodic motion is executed by only the particles other than those at the nodes. 2. The phase difference between particles of the medium is same. 3. The distance between 3 successive nodes is called a wavelength.#Be Brainly❤️ |
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| 12. |
please tells me this question is from 11 class and question is Which one is more poisonous in nature CO or CO2??? DONT SPAM and give me perfect answer |
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Answer» s with haemoglobin in blood to form a complex called Which is 300 TIMES more stable than This disrupts oxygen supply in the BODY THEREBY causing many diseases and eventually death.CO is more DANGEROUS than CO2. CO2 can’t form such complexes. #Be Brainly❤️ |
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| 13. |
Please answer the question of is : Define oscillation and also write it's types .. |
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Answer» and fro MOTION about a fixed point is called as oscillation.There are of oscillations:- is when a SHM SYSTEM oscillates with a constant AMPLITUDE which does not change with TIME . is in which amplitude goes on decreasing with INCREASE in time.#Be Brainly❤️ |
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| 15. |
Que is..............................................ans |
| Answer» R...!!❤hope ANS will HELP UH....❤☆☆ | |
| 16. |
Explain all the three modulus of elasticity ??? ☺☺ |
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Answer» moduli1.Young's modulus (E) describes tensile elasticity, or the tendency of an object to deform along an axis when opposing forces are applied along that axis.It is DEFINED as the ratio of tensile stress to tensile strain. It is often referred to simply as the elastic modulus.2.The shear modulus or modulus of RIGIDITY (G or μ ) describes an object's tendency to shear (the deformation of shape at constant volume) when acted upon by opposing forces.It is defined as shear stress over shear strain. The shear modulus is PART of the derivation of viscosity.3.The bulk modulus (K) describes volumetric elasticity, or the tendency of an object to deform in all directions when uniformly loaded in all directions.It is defined as volumetric stress over volumetric strain, and is the inverse of compressibilityFIND MODULUSYoung's Modulus (E) or the modulus of elasticity is a measure of a materials stiffness. The higher the Young's modulus value the stiffer the MATERIAL. Young's modulus can be calculated from tensile test stress/strain graphs–derived from load/extension graphs.Young's modulus = stress/strain = (FL0)/A(Ln − L0). This is a specific form of Hooke's law of elasticity. The units of Young's modulus in the English system are pounds per square inch (psi), and in the METRIC system newtons per square metre (N/m2)HOPE THIS WILL HELP YOU |
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| 17. |
What is meant by velocity plz follow me to talk ❤❤❤ |
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Answer» ty is a speed of SOMETHING in a given direction.It specifically refers to the measurement of the rate and the direction of change in POSITION of an object. Unit of velocity is metre PER second (m/s).⬅Hope this answer helps you.... ☺Please mark my answer as Brainliest !! |
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| 18. |
Explain how names and symbols of element are given in modern days |
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Answer» the SYMBOLS are GIVEN from the STARTING 2 LETTERS of element's name |
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| 19. |
hey friends this question is from 11 and explain on the level of 11 so write types of motion and also explain it don't copy it from google give me perfect answer |
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Answer» can be BROADLY classified into three MAJOR types:- is a motion of a particle in straight line. Like BUS travelling in straight road etc. refers to the motion of a body around a fixed axis. Like motion of a top, rotation of EARTH etc.#Be Brainly❤️ |
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| 20. |
When do you say that a solution is a concentrated solution |
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Answer» no of hydrogrn MOLECULE is more in the SOLUTION then it is SAID to he CONCENTRATED solution |
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| 21. |
draw a ray diagram to show the path of the reflected ray corresponding to an incident ray which is directed parallel to the principal axis of a convex mirror. |
| Answer» U UNDERSTAND it | |
| 22. |
Find odd man out between the incident ray normal periscope and the reflected |
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Answer» . PeriscopeReason. PERISCOPE is an instrument but others incident RAY, NORMAL, reflected ray are RAYS of MIRROR |
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| 23. |
Which one is considered as a cleanest fuel ? A) Natural Gas B)Hydrogen |
| Answer» URAL GAS............. | |
| 24. |
In the above experiment_______ would be use to find the direction of magnetic lines of force |
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| 25. |
What is the si unit of amplitude ,frequency and time period. Of chapter sound. |
| Answer» CY. amplitude.Time PERIOD .all has SI UNIT HERTZ | |
| 26. |
Which metal salt solution is taken as electrolyte |
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Answer» .........MAYBE. |
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| 27. |
A bullet of mass 10 g strikes a wooden block with a velocity of 30 m/s after penetrating 20 cm In to it it’s velocity drops to 200 m/s Then average resistance offered by the block is |
| Answer» ND LAW of MOTION | |
| 28. |
When does Snell's Law fail? |
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Answer» Law of Refraction FAIL when light INCIDENTS on the SURFACE of separation of the 2 MEDIA normally or through the normal. It is because when light incidents through the normal, the angle of INCIDENCE is equal to zero. Therefore the angle of Refraction is also zero. |
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| 29. |
A source of a wave produces 30 crests and 30 troughs in 0.3 seconds what is the time period of the wave |
| Answer» EXPLANATION:Solution :-One wave CYCLE comprises of one crest and one trough. As the given source produces 30 crests and 30 troughs, the given source produces 30 FULL wave cycles in 0.3 s.Therefore,Number of wave cycles produced in 0.3 s = 30 and number of wave cycles produced in 1 s.= 30/0.3 = 100But the number of wave cycles per second REPRESENTS frequency. Therefore, the frequency of the wave is 100 Hz.Also, time period (T) of the wave,= 1/100 = 0.01 seconds.Some Formulae related to the Topic :-1. T = 2π√l/gwhere l = length of the pendulum and g = ACCELERATION due to gravity2. Frequency and time period related as,v = 1/T3. Velocity of a wave is given as,v = v × λor v = v/λAlso, λ = v/vwhere, λ = Wavelengthv = velocityv = Frequency | |
| 30. |
Can anyone explain me about blast furance Plz........fast....... |
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Answer» furnace is a type of metallurgical furnace used for smelting to PRODUCE industrial metals, generally PIG iron, but also others such as lead or COPPER. Blast refers to the combustion air being "forced" or supplied above ATMOSPHERIC PRESSURE. |
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| 31. |
Four rods of same material but different radii r and length l are used to connect two reservoirs of heat at different temperatures the one which will conduct most heat is |
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Answer» t conduction per UNIT time is given by,dq/dt = k(t₁ - t₂)A/L=> dq/dt = k(t₁ - t₂)πr²/l=> dq/dt ∝ r²/lhence we can see that the heat conduction is directly PROPORTIONAL to the RADIUS and INVERSELY proportional to the length.So heat conduction is maximum when r is maximum and l is minimum.Hence the rod with maximum radius and minimum length will conduct maximum heat. |
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| 32. |
Which material is used in preparing box nut in bench vice? Guys please help me |
| Answer» EX miterial is used to PREPARING box NUT in bench VICE | |
| 33. |
Fall up science and technology std 10 practical note book |
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Answer» the QUESTION |
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| 34. |
Light travels in a path which takes least time to travel this statemwnt given by |
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Answer» ravels in a PATH which takes least TIME to TRAVEL this STATEMENT is given by Sir Dak Hahset |
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| 35. |
the work done per unit volume to stretch the length of area of cross section 2mm^2 by 2% will be (Y=8*10^10N/m^2 |
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Answer» al WORK done in stretching a material per UNIT volume by 2% LENGTH will be 16 MJ/m³Explanation : Given, young's modulus, Y = 8 x 10¹⁰ N/m²percentage CHANGE in length, ΔL/L = 2% = 2/100we KNOW that the total work done in stretching a material is given by,U = 1/2 x Y x (ΔL/L)² x Vhence work done per unit volume= U/V = 1/2 x Y x (ΔL/L)²= 1/2 x 8 x 10¹⁰ x (2/100)²= 16 x 10⁶ joules/m³= 16 MJ/m³Hence the total work done in stretching a material per unit volume by 2% length will be 16 MJ/m³ |
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| 36. |
If omega =2t, R= 2m find the time when angle between ar and anet =37 degree |
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Answer» is HELPS you . |
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| 38. |
Why cooling hot water in natural Ambience it follows that type of behaviour out of the following |
| Answer» E i THINK the ANSWER is OPTION (C) | |
| 39. |
What is the e/m ratio of alpha particle |
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Answer» article is a helium nucleus which consists TWO PROTONS and two electrons. It has +2 charge and the mass of four protons. So the ALPHA particle has the least E/M because of its large mass.You can see that its E/M is EQUAL to 1/2 time E/M of a proton. |
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| 40. |
Hlowhat are elements |
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Answer» ent is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms CONTAINING a SINGLE PROTON and a single ELECTRON. ... All isotopes of a particular element have the same number of protons, but have a DIFFERENT number of neutrons.HOPE THIS WILL HELP YOU |
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| 41. |
What are compound ??? |
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Answer» d is a PURE SUBSTANCE which is MADE up of molecules of same kind. for example what is the compound made up of water molecules. is molecule of water contains two ATOMS of HYDROGEN and one atoms of oxygen combined together |
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| 42. |
What difference between meter and wheatstone bridge |
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Answer» bridge is an electric device used for MEASURING an unknown resistance. It WORKS in the principle of the balanced condition of Wheatstone bridge. ... A meter scale fixed on the board ALONG AC is used to measure the balancing LENGTH. A cell connected across the bridgewire maintains a current is the CIRCUIT |
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| 43. |
Plzzz explain this.... Newton's law of gravitation can also be applied to spherical bodies for diving outside points by treating distance from the centre of mass. |
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Answer» ere is your answer _________✌✌✌✌✌✌✌✌✌✌✌✌✌✌✌For extended bodies, the force law holds for each INFINITESIMAL piece, and so the total force is the sum (i.e., integral) of each of these infinitesimal forces.For a spherically symmetric object A (this means the object is a SPHERE and its mass density depends only on the distance from the center), it turns out that the gravitational force from A on any other object B that is exterior to A is just the gravitational force on B as if all of the mass of Awere concentrated at its center. In other words, spherically symmetric objects act as if they were point masses, but only on their exterior. This can be proved using the divergence theorem from advanced calculus, and in PHYSICS it typically GOES by the name of Gauss's Law.<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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| 44. |
If a wire is stretched to its double then its strain is? |
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Answer» your answer ________@@@@✌✌✌✌✌✌✌✌If a WIRE is stretched to double of its length, what will be the strain? LONGITUDINAL Strain is ratio of CHANGE in length to original length. Wire is stretched to double it's original length. Hence change in length = 2×L - L (where L is original length. ). hope it helps you please mark me brainlist... |
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| 45. |
Where gravity exists mass does not exist,is it true? |
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Answer» lutely wrong.w=mgm=w/g |
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| 46. |
What is the significance of second law of thermodynamics in physics |
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Answer» MATE ❤️❤️ HERE IS UR ANSWER..SIGNIFICANCE OF SECOND LAW OF THERMODYNAMICS IN PHYSICS....The laws of thermodynamics describe the relationships between thermal energy, or heat, and other forms of energy, and how energy affects matter. The FIRST Law of Thermodynamics states that energy cannot be created or destroyed; the total quantity of energy in the universe stays the same. The Second Law of Thermodynamics is about the quality of energy. It states that as energy is transferred or transformed, more and more of it is wasted. The Second Law also states that there is a natural TENDENCY of any ISOLATED system to degenerate into a more disordered state....HOPE THIS WILL HELP YOU ❤️❤️STAY BLESSED ❤️ ❤️@PANKHUDI NEWELY JOINED ✌️✌️ |
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| 47. |
State long term perspectives of management of natural resources |
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Answer» resource management refers to the management of natural RESOURCES such as land, WATER, soil, PLANTS and animals, with a particular focus on how management affects the quality of life for both PRESENT and future generations (STEWARDSHIP). |
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| 48. |
During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio cp/cv for the gas is |
| Answer» COULD HELP to you. | |
| 49. |
With the help of an activity, explain the method of inducing electric current in a coil with a moving magnet. State the rule used to find the direction of electric current thus generated in the coiL |
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Answer» ng are the steps to induce electric current in a coil with a magnet:a) Take a coil of wire AB having a large number of turns.(b) Connect the ends of the coil to a galvanometer.(c) Take a strong bar magnet and move its north pole towards the end B of the coil.(d) There is a momentary deflection in the needle of the galvanometer, SAY to the right. This indicates the presence of a current in the coil AB. The deflection becomes zero the moment the motion of the magnet stops.(e) Now withdraw the north pole of the magnet away from the coil. Now the galvanometer is deflected toward the left, showing that the current is now set up in the direction opposite to the first.(f) Place the magnet stationary at a point near to the coil, keeping its north pole towards the end B of the coil. We see that the galvanometer needle DEFLECTS toward the right when the coil is moved towards the north pole of the magnet. Similarly, the needle moves toward the left when the coil is moved away.When the coil is kept stationary with respect to the magnet, the deflection of the galvanometer drops to zero.To find the direction of electric current Fleming's right-hand rule is applied. According to it, if N,e stretch the forefinger, middle finger and thumb of our right hand mutually perpendicular in such a way that thumb points along the direction of motion of CONDUCTOR, forefinger along the direction of magnetic field; then the middle finger points along the direction of INDUCED current. |
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