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. |
Sound need medium because when sound is produced , it mostly travels in air and makes the aur partical vibrate . This vibration goes inside our ear drum and we hear the sound but in case of light it don't need medium |
| Answer» MATE ❤️❤️❤️❤️ HERE IS UR ANSWER...SOUND NEEDS A MEDIUM BECAUSE WHEN SOUND PRODUCED IT MOSTLY TRAVELS IN AIR AND ITS PARTICLE VIBRATE AND REACHES ARE HERE BUT IN CASE OF LIGHT IT DOESN'T THIS IS BECAUSE SOUND IS A LONGITUDINAL WAVE WHICH TRAVELS IN A MEDIUM IT REQUIRED FOR MEDIUM BUT LIGHTWAVE A TRANSVERSE WAVE THEY DOESN'T REQUIRED ANY MEDIUM LIGHT WAVES ARE ELECTROMAGNETIC WAVES...HOPE THIS WILL HELP YOU ❤️ ❤️ STAY BLESSED ❤️ ❤️❤️@PANKHUDI NEWELY JOINED ✌️ ✌️ | |
| 2. |
Specific resistance of a conductor depends upon its length is it true or false |
| Answer» FALSE I HOPE it HELPED you | |
| 3. |
Of the following devices does not use an electric cell table fans or transistor |
| Answer» ANS don't USE electrixity. | |
| 4. |
Petroleum occur under water sources but in Arabian country it occur under sand .give reason if your answer would be right I will mark as brain list answer in 50 words |
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Answer» k of water and DRY CLIMATE do not permit the PLACE where cultivation TAKES place is osases and this happens |
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| 5. |
Solve physics no spam |
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Answer» istance between R2,R3, R4 = 1/R= 1/4+1/4+1/41/R=3/4R=4/3 ohmtotal RESISTANCE = 4+4+4/3 = 8+4/3=28/3 ohmplease FOLLOW me |
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| 6. |
The magnetic field in a plane electromagnetic wave is given by b=(100 mu t)sin[(2*10^15) |
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Answer» eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee |
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| 7. |
The mass and diameter is twice as that of earth the value of 'g' is |
| Answer» SS is TWICE and RADIUS is 4times so g = G*2m/4r^2 g = Gm/8r^2 g= Gm/r^2 for earth and HENCE it will be 9.8/8 = 1.225m/sec^2 | |
| 8. |
State and arrive at brewster’s Law in polarisation |
| Answer» TE !!!HOPE THIS HELPS YOU ...STATEMENT : -Brewster's LAW of polarization states that, " The refractive index of a reflector is equal to tangent of the polarising angle. ."CONSIDER a polarizer with i(B) be the angle of polarization , 'n' be it's refractive index , then according to the law :tan [i(B)] = n So we have to prove that , tan [∅(p)] = n PROOF :-Consider a polarizer with an incident light ray on it with angle of incidence 'i' ,some light ray gets refracted with angle of refraction 'r'.Let angle of incidence of polarizer be 'i(B) '.Then by Snell's Law ,n = sin i/sin r and n= sin i(B)/sin r _______(1) => sin i / sin r = sin i(B) / sinr=> i = i(B)And we know that Brewster's angle of incidence , r + i(B) = 90=> r = 90 - i(B) ____________(2)Substituting equation (2) in (1)=> n = sin i(B) / sin [90-i(B) ]=> n = sin i(B) / cos i(B) => n = tan i(B)HENCE PROVEDTHANK YOU FOR THE WONDERFUL QUESTION...#bebrainly | |
| 9. |
What is meant by leading and lagging power factor in transformers? |
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Answer» e power FACTOR is 1, all the energy SUPPLIED by the source is consumed by the load. Power factors are usually STATED as "leading" or "lagging" to show the sign of the phase angle. Capacitive loads are leading (current leads voltage), and INDUCTIVE loads are lagging (current lags voltage).Hope it helps...Kumar Shantanu |
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| 10. |
Show that the electron revolving around the nucleus in a radius r with orbital speed v has magnetic moment |
| Answer» II jvj jvv CC GHH | |
| 11. |
Show that the force acting on electric dipole placed in a uniform electric field is zero |
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Answer» forces experienced by the 2 charges CONSTITUTING the ELECTRIC dipole when placed in an uniform external electric field are equal and opposite in nature, the net force on the dipole is zero.2) angle of rotation = 180thantorque = PE sin180 = 0No TORQUE act on the dipole when the moment of electric dipole is parallel to the electric field. |
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| 12. |
What is solar cell panel? mention any two of its application |
| Answer» CELL PANEL is a combination (or array) of a large number of solar CELLS. Application - TV relay stations, artificial satellites, SPACE probes, wireless transmission etcit is USED in study lamps,calculators,street lights and in some houses | |
| 13. |
Explain the consequences of the noise pollution? please fast |
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Answer» tinuous UNWANTED and unpleasant sounds which are useless and no USE are KNOWN as noise pollution |
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| 14. |
Relation between critical angle and absolute refractive index |
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Answer» llowing up on the first ANSWER by tomorrow morning BED and BREAKFAST |
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| 15. |
A stone is thrown vertically upward with an initial velocity of 40 m/s . Taking the g value as 10 m/s^2 find the maximum height reached by the stone .What is the net displacement and total distance covered by the stone? |
| Answer» IGHT = (U*u / 2G ) = 1600/20 = 80M | |
| 16. |
Which Indian woman was the first to win the nobel prize fgeeeddddd |
| Answer» | |
| 17. |
The weight of a person on the earth is 80kg. What will be its weight on the moon?given mass of the moon =7.34×10^22kg.radius=1.76×10^6and gravitational constant =6.67×10^_11kg nm.what will be the mass of the person and acceleration due to gravity there? |
| Answer» KNOW SORRY.... | |
| 18. |
Difference between biodegradable and non biodegradable polymers |
| Answer» IC difference between biodegradable and non-biodegradable is that biodegradable items decompose or break down naturally. Non-biodegradable items don't. This particular difference is most IMPORTANT when discussing landfills and waste disposal. Large volumes of non-biodegradable waste take up EXCESS waste and are potentially damaging to the environment.Hope this will HELP you! | |
| 19. |
At what angle should the displacement be to get the maximum work done by a force |
| Answer» GLE is zero then WORK is MAXIMUM because COSINE at zero is 1 | |
| 20. |
Find the resultant of two vectors along the same direction |
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Answer» end..Here is your ANSWER..The resultant of two VECTOR along the same DIRECTION is ADD the both magnitude of vector.HOPE that it will help you |
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| 21. |
A force of 6N and another 8N can be applied together to produce the effect of single force of magnitude is |
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Answer» are ACTING on the same side of the object just add the TWO. so 6N + 8N is 14N.If they are acting on OPPOSITE SIDES of the object then net force is 8N-6N=2N |
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| 22. |
Please Ans for 8. ????? |
| Answer» KNOW MARK as BRAINLIEST OK | |
| 23. |
What are state and path functions in thermodynamics? |
| Answer» FUNCTION is a property who VALUE does not dapend on path TAKEN to reach that SPECIFIC value | |
| 24. |
The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is |
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Answer» raulic efficiency of an impulse turbine is MAXIMUM when velocity of wheel isIn a centrifugal PUMP, the water enters the impeller __________ and leaves the vanes axially. A Kaplan turbine is an axial flow REACTION turbine. The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is __________ of the jet velocity, A.hope it helps mark as BRAINLIST |
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| 25. |
Prove the energy remains coserved for a freely falling mass m. |
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Answer» n :-PROVE the energy remains conserved for a freely falling mass m.______________________Formulas :Potential energy U = mghKinetic energy K = 1/2 mv²Total energy = K + UAt AU = mghK = 0 since v = 0Total energy = K + U = mgh + 0 = mghAt BU = m g HH = h - xU = mg ( h - x )K = 1/2 m v²By laws of motion:v² = 2 gh= > v²= 2 gxK = mgxK + U = mg( h - x ) + mgx = mgh - mgx + mgx = mghAt CK = 1/2 m v² = 1/2 m × 2 gh [ v² = 2 gh ] = mghU = 0 since h = 0Hence K + U = mgh + 0 = mghObservations :In all cases ,K + U = mghThere fore the total mechanical energy remains constant.This verifies the Law of Conservation of Energy.__________________________________________ |
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| 26. |
A battery gets discharged why |
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Answer» scharge is a phenomenon in batteries in which INTERNAL chemical reactions reduce the STORED charge of the battery without any connection between the electrodes. Self-discharge decreases the SHELF life of batteries and causes them to initially have less than a full charge when actually PUT to USE. |
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| 27. |
Define formula mass of compound. |
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Answer» ═══════════════╕☬ BRAINLY CONQUERER ☬╘═════════════════════╛Answer:-FORMULA mass of Compund :-•⏩The mass if each and every element in an compound calculated by following several ratios by its constituent COLLECTIVELY is Formula mass FURTHUR,•⏩Gram formula mass is the amount of a compound with the same mass in grams as the formula mass in amu. •⏩it is the sum of atomic masses of all ATOMS in a formula, regardless of whether or not the compound is molecular.╒══════════════════════╕☬ THANKS! Regards ☬╘══════════════════════╛ |
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| 28. |
A person uses a pens of power -2.0D for correcting his distant vision. For correcting his vision he uses lens of power +1.5D. What is the focal length of lens required to correct this disorder? |
| Answer» USES a lens of power p = -2.0Dfocal LENGTH required F = 1/-2.0 *100 = -50cmPerson uses a lens of power p = +1.5Dfocal length f = 1/+1.5 * 100 = +66CM | |
| 29. |
Velocity 30m s in 10 seconds. What is its acceleration |
| Answer» | |
| 30. |
Give few examples where energy is possessed by a boy due to its change in shape |
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Answer» gation and contraction of muscles2. MOVEMENT of hands in a CIRCULAR MOTION GENERATES speed in a BALL while playing cricket or other sports |
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| 32. |
Sin 2x by anintio method |
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Answer» n2x DX. =∫SINX⋅sinx d X. =∫sinx⋅ddx(−cosx) dx. which by IBP BECOMES... I=−sinxcosx+∫ddx(sinx)⋅cosx dx |
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| 33. |
The frequency of ultrasonic waves produced in magnetostriction effect is |
| Answer» KNOW YAAR .CALL my EXPERT THATS me 8129373982 | |
| 34. |
Potentiometer is that which has large insensitivity and a greater length and small resistance. As you can see in the fig. Y has the larger length than x and larg |
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Answer» s the FIGURE??? |
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| 35. |
Relate commercial and SI unit of electrical energy |
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Answer» cal energy is expressed in joules, power is expressed in watts, and time is expressed in SECONDS.... The UNIT for ELECTRICAL energy is the joule.this is your ANSWER |
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| 36. |
What do you mean by echo ? Explain in brief. |
| Answer» N echo is a repetition or IMITATION of sound. When sound waves hit a hard surface they might reflect, making the sound bounce and repeat. If you agree with SOMEONE, you mightecho his or her statement. | |
| 37. |
List out the forms of energy that we use in a day(physics) |
| Answer» CAL energy /SOUND energy/ HEAT energy / solar energy/ etc | |
| 39. |
A Ray of light enters benzene from air if the reactive index of benzene is 1. 50 by what percent does the speed of light reduce on entering the Benzene? |
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| 40. |
Explain bio gas power plant with construction and its principle |
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Answer» s plant mainly works on the chemical property the DECOMPOSITION REACTION. In this reaction the biogas gas plant gets decomposable or biodegradable waste into it. There is a need to add cow dung for every day. We have to continue this up to 6 to 7 weeks. Then the waste is decomposed and releases methane. Methane is a combustible substance. Hence it can be used for gas stoves. The gas ENTERS the exhaust pipe and REACHES the stove. This can reduce air pollution and SAVE natural resources (LPG). |
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| 41. |
Other method of determining the density of a regular solid, other than water displacement method is instead of measuring surface area directly, use a graduated cylinder to find the objects volu |
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Answer» ulate the density of solids with irregular surfaces, volume must be DETERMINED by another method. INSTEAD of MEASURING the surface area directly, use a graduated cylinder to find the object's volume. Pour water into the graduated cylinder until it reaches a known LEVEL |
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| 42. |
Calculate the pressure exerted by water at the bottom of the lake of depth is 6m density of water 1000 kg/m cube and g=10 m/s square |
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Answer» t Only Site+ Non-Flash Version+ Contact GlennFluids Pressure and DepthSUBJECT: AeronauticsTOPIC: Hydrostatic PressureDESCRIPTION: A set of mathematics problems dealing with hydrostatics. CONTRIBUTED BY: Carol Hodanbosi EDITED BY: JONATHAN G. Fairman - August 1996A fluid is a substance that FLOWS easily. Gases and liquids are fluids, although sometimes the dividing line between liquids and solids is not ALWAYS clear. Because of their ability to flow, fluids can exert buoyant forces, multiply forces in a hydraulic systems, allow aircraft to fly and ships to float.The TOPIC that this page will explore will be pressure and DEPTH. If a fluid is within a container then the depth of an object placed in that fluid can be measured. The deeper the object is placed in the fluid, the more pressure it experiences. This is because is the weight of the fluid above it. The more dense the fluid above it, the more pressure is exerted on the object that is submerged, due to the weight of the fluid.The formula that gives the P pressure on an object submerged in a fluid is: |
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| 43. |
Calculate the force required to move a block of mass 20 kg resting on horizontal surface. |
| Answer» GIVEN that,FORCE(F)=?MASS(M)=20Acceleration(a)=g=9.8cm-2By APPLYING this formula:F=maF=20*9.8F=196N | |
| 44. |
Why sound waves called mechanical waves answer it in easy language |
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Answer» aves are mechanical wavesbecause they need a material medium for propagation, like AIR or LIQUIDS like water, or metals like SILVER. ... The other type of waves, called electromagneticwaves (like LIGHT) do not need a material medium to TRAVEL, and can even go through vacuum. |
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| 45. |
Newton law daily uses information in marathi language |
| Answer» MARK it as BRAINLIEST ANSWER and THANK you | |
| 46. |
The direction of a magnetic field within a magnet is |
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Answer» the MAGNET DIRECTION is NORTH to SOUTH INSIDE the magnet south to north |
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| 47. |
The difference between ampere's law and biot savart law |
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Answer» s law and biot-savart law, both HELP in finding MAGNETIC field DISTRIBUTION. Bi0t-savart law is the more brute for force approach, you evaluate this integral when there is n0t enough symmetry to use ampere's law.I HOPE it may helpful to you.....PLZZZ mark me as a brainliest |
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| 48. |
Information about recent earthquakes |
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Answer» de 6.7 earthquake Affected COUNTRIES: CHILE and Argentina 15 km from Coquimbo, Chile · JAN 20, 5:32 AM |
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| 49. |
Gravitational force vetween two bodies is 1N. If the distance between them is doubled. What will be the force? |
| Answer» TELL you LATER | |
| 50. |
Suggest two ways to reduce energy consumption? |
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Answer» your ELECTRIC company if they provide no-cost lighting AUDITS and rebates to cover some of the expense for new energy-efficient equipment, INCLUDING motor upgrades.2)Install motion sensitive LIGHT switches in areas with little or no ACTIVITIES. |
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