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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. |
From a disc of radius R a mass M, a circular hole of diameter R, whose rim passes through the center is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis to the plane of the disk and passing through other end of diameter it P.S I hope you die if you give a shlt answer |
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Answer» ONG>Answer: From a disc of radius RandmassM, a circular hole of DIAMETER R, whose rim passes through the CENTRE is cut. What is the moment of inertia of REMAINING PART of the disc about a perependicular axis, passing through the centre ? =MR22-332MR2=1332MR2. |
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| 2. |
What is newton's second law |
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Answer» ong>Answer: For a CONSTANT mass m, Newton's second LAW looks LIKE: F = m * (V1 - V0) / (t1 - t0) The change in velocity divided by the change in TIME is the definition of the acceleration a. The second law then reduces to the more familiar product of a mass and an acceleration: F = m * a. |
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| 3. |
Deduce the expression for the free longitudinal vibration in terms of spring stiffness, its inertia effect and suspended mass.? |
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| 4. |
a body is moving on a circular path with increasing speed the angle between velocity and centripetal acceleration is _____? |
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Answer» ong>Answer: Tangential acceleration of the particle is zero and thus centripetal acceleration is the only acceleration of the particle which always acts towards the CENTER of the CIRCULAR PATH. Thus angle between velocity and acceleration of the particle describing uniform circular MOTION is 90° Explanation: follow me⭐ |
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| 5. |
Why don't the magnetic field lines in a magnetic field intersect?? Answer this question to get a brainliest |
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Answer» ONG>ANSWER: if they do so there will be two directions ,which is not possible. plz MARK as BRAINLIEST |
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| 6. |
Describle an activity to show that image distance and nature of image depends on objects distance for a concave mirror |
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Answer» ong>ANSWER: The size of the image depends upon the DISTANCE of the object from the mirror and it's position with respect to the mirror's surface. ... LIGHT RAYS parallel to the optical or principal axis are reflected from the surface in a manner that diverges from a FOCAL point that is behind the mirror. Explanation: Mark as brainlist |
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| 7. |
Which of the is true for displacement? (1) A) It cannot be zeroB) Its magnitude is greater than the distance travelled by the object. C) It's the shortest distance between initial & final position.D) It is a vector quantity. |
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Answer» ONG>ANSWER:kjcaachsdjdj jsfhjfhahdf fjsafhjfa Explanation: ajkdasnsjndsjdsjdhdjsdhsdhsd jsdsjdhsjdhskjdsjds |
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| 8. |
On what material properties does friction depends |
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Answer» ⫷ANSWER⫸⫷⎠⎠ Friction does not depend on the amount of surface area in contact between the MOVING bodies or (within CERTAIN LIMITS) on the relative SPEED of the bodies. It does, however, depend on the magnitude of the FORCES holding the bodies together. Hope this will help you♥ |
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| 9. |
Using what your know about the compressibility (squeezability)of the different states of matter explain why air is used to inflate tires |
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Answer» WER:- As we know,air is highly compressible.Air is used to inflate tyres becoz air can take shape of any substance that is pushed into,as there are large intermolecular spaces present in the air,Thus,when air is filled in a tyre,its PARTICLES DISTRIBUTE themselves evenly by diffusion inside the tyre,giving it a proper balance. Liquid can be filled in a tyre but it will exert more pressure than the atmospheric pressure and there will be chances of tyre getting burst .Besides,it will unnecessarily INCREASE the weight of the vehicle. HOPE IT HELPS!!!...PLS mark as brainliest |
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| 10. |
Give the definition of electric potential and potential difference |
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Answer» ong>Answer: DEFINITION of electrical potential is the amount of WORK needed to move a unit charge from reference point to a specific point against electric field. I HOPE it helps you my friend... |
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| 11. |
O The Law of reflection hold true for: Planal mirror only Convex mirror only Concave mirror Only all deflecting sto face |
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Answer» ONG>ANSWER: . . . \\\\\\\\\\ |
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| 12. |
The speed of a projectile u reduces by 50% on reaching maximum height what is the range on the horizontal plane ? |
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Answer» your ANSWER is in this ATTACHMENT |
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| 13. |
How will momentum of a body change if its K.e. is halved |
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Answer» ong>Answer: THEREFORE if momentum is halved , the KINETIC energy will be 4 times of the INITIAL , if it is conserved. HOPE IT WILL HELPFUL TO YOU. PLEASE MARK AS BRAINLIST... THANKS |
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| 14. |
* Matter and construction of matter. |
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| 15. |
What is the arrangement which help us to draw DC from DCgenerator |
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Answer» ong>ANSWER: To keep the torque on a DC motor from reversing every time the coil moves through the plane perpendicular to the MAGNETIC field, a split-ring DEVICE called a commutator is used to reverse the current at that point |
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| 16. |
सार्वत्रिक गुरुत्वीय नियतांक G की विमा क्या है? [M¹L²T⁰][M⁻¹L¹T⁻²][M²L¹T¹][M⁻¹L³T⁻²] |
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Answer» ONG>ANSWER: .............................................................................. ........................................,.................................... .............................................................................. |
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| 17. |
160 लपराभर उ घटेर घय राननापिनगिऊगा कि उससीधेपू10२)3040हा- छलाप चपमघरपेपजाळ यहि पाल मापारि मारियोसाधीon०ਹਿੰਦੀل با کउिपरबाई हटीगा- कोणा पीणा कर रिण इत्त शनिंगघले |
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Answer» ONG>ANSWER: plz SEND me in English..... |
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| 18. |
Single Line Question Option : No Option Orientation : erticalTwo point objects A and B each of mass 3 g and initially at rest are connected by masslessthreads as shown in the figure. A constant force 2 Nacts on the system at point P along OP.After the point 'O' has moved a distance 20 cm in the direction of force, the two objectscollide and stick together. The displacement and velocity of the centre of mass of thesystem immediately after collision are respectivelyఒక్కొక్కటి ద్రవ్యరాశి గల బిందు పరిమాణం గల A మరియు B అనే రెండు వస్తువులు పటంలోచూపిన విధంగా తేలికైన దారాలతో కలుపబడినవి. OP దిశలో P బిందువు వద్ద 20ల స్థిరబలం వ్యవస్థపై పనిచేయుచున్నది. '0' బిందువు బలప్రయోగ దిశలో 20 cm జరిగిన తర్వాత రెండు వస్తువులుఅభిఘాతం చెంది ఒకదానికి ఒకటి అతుక్కున్నవి. అభిఘాతం జరిగిన వెంటనే, వ్యవస్థ ద్రవ్యరాశి కేంద్రంయొక్క స్థానభ్రంశం మరియు వేగం వరుసగా10cm1|190600OP90060F=2NI10cmB |
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Answer» ong>Explanation: if a orientation is 0 and 20 cm and 3G of INTIALLY at rest so 10 cm 100 f=2n |
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| 19. |
The value of magnetic susceptibility of paramagnetic substance (a)negative and small(b)negative and large(c)positive and small(d)positive and large |
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Answer» etic susceptibility is χ>0 which means it is ALWAYS a small positive value for paramagnetic MATERIALS. These materials are temperature dependent and are weekly attracted by magnets with relative permeability 1.00001 to 1.003. (C) Positive and Small |
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| 20. |
How memanyof water at 20⁰c will evolve1k Cal of heat byby becoming ice at 0⁰c |
| Answer» ONG>ANSWER: | |
| 21. |
Define isochoric process andthermodynamics of isochoric process. |
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Answer» ong>ANSWER: An isochoric process, also called a constant-VOLUME process, an isovolumetric process, or an ISOMETRIC process, is a THERMODYNAMIC process during which the volume of the closed system undergoing such a process remains constant. |
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| 22. |
The maximum speed of particle performing S.H.M. is 6.28 cm/s , if the length of its path is 8cm,then its period is... |
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Answer» ong>Answer: HOPE this will help you Please mark me as brainleast Explanation: v= 6.28
l of path = 8 CM
that means Amplitude A = 4 cm
v=omega*A
omega= v/A =6.28/4
time PERIOD= 2π/(omega)
= 6.28/(omega) =4 s
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| 23. |
What made the humans begien to search for the afternative for natutal fabric |
Answer» ONG>EXPLANATION:it will HELP you DEAR..... |
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| 25. |
The number of electric lines of force radiating from a closed surface in vacuum is 1.1 The charge enclosed by the surface is |
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Answer» ong>ANSWER: |
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| 26. |
06. एक वस्तु L लंबाई की एक डोरी के सिरे पाऊर्ध्वाधर तल मे घूम सकती है। उच्चतम स्थितिमे वस्तु को दिया गया क्षैतिज वेग, यदि न्यूनतमस्थिति मे डोरी मे तनाव वस्तु के भार का दसगुना है, होगा:(A)/13gl(B)(6gL(C)5gL(D)✓ gl |
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Answer» ONG>ANSWER: √gl is the WRITE answer |
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| 27. |
The average translational kinetic energy of O2 (molar mass 32) molecules at a particulartemperature is 0.048 eV. The translationalkinetic energy of N, (molar mass 28)molecules in eV at the same temperature is1) 0.0015 2) 0.003 3) 0.048 4) 0.768 |
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Answer» ONG>ANSWER: 33.4 is was the crect answer |
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| 28. |
Calculate the magnetic field at the centre of a circular current loop, carrying current 5A.radius of the loop is 2cm. |
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Answer» ong>Explanation: |
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| 29. |
The linear momentum of a particle as a function of time t is given by P = a + bt, where a and b are positive constants. What is the force acting on the particle? |
| Answer» ONG>Answer: | |
| 30. |
X,Y and Z are ammeters and Y reads 0.5A.(i) What are the readings in ammeter X and Z?(ii)What is Voltage across battery?(iii)What is total resistance of the circuit? |
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Answer» ong>Answer: |
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| 31. |
4 points The dimensional equation cannot be used --- 1) to check the correctness of a physical quantity 2) to derive the relation between different physical quantities 3) to find out constant of proportionality which many be pure number 4) to change from one system of units to another system. |
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Answer» ONG>Answer: 3............................. |
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| 32. |
29. Can a body possess energy even when it is not in motion ? Explain your answer with anexample. |
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Answer» ong>Answer: Yes, a body POSSESSES ENERGY even when it is not in motion ; CONSIDER a body raised to a certain height SAY h. It its velocity is zero. Kinetic energy will be zero but the body will have. P.E. = mgh Thus, a body may possess energy even though it is not in motion. |
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| 33. |
Q10: I am a country where democratic function of the government is based on by party ( two party) system. Name me.1 |
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Answer» ONG>ANSWER: America hope you GOT it.. |
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| 34. |
4.The brakes applied to a car produce an acceleration of 6 m/s 2 in the opposite direction to the motion. If the car takes 3 s to stop after the application of brakes, calculate the distance it travels during this time. |
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Answer» ONG>ANSWER: the answer is 27m ANSWER Given: ACCERLERATION: a=−6 m/s2 Time t=3 s Final VELOCITY, v=0 m/s v=u+at 0=u−6×3 u=18 m/s s=ut+1/2×at^2 s=18×3+1/2×(−6)×9 s=54-27 ⇒s=27m |
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| 35. |
Differentiate between atmospheric pressure and liquid pressure |
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Answer» ong>Answer: HYDROSTATIC PRESSURE is the pressure EXERTED by an incompressible fluid (a liquid) at a given point, due to the weight of the fluid above it. Atmospheric pressure is the pressure exerted on a surface by the weight of the atmosphere (a COMPRESSIBLE fluid) above it. |
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| 36. |
A cheetah can start from rest and attain velocity 72 km/hr in 2 seconds. calculate the acceleration of cheetah. Plz... Answer me guys.. It's very urgent... |
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Answer» ong>Answer: a = 10m/s^2 Explanation: v = 72 km/hr = 20 m/s v = U + at a = 10m/s^2 fairly HIGH |
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| 37. |
No force acts on a current carrying conductor when it is placed- * |
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Answer» ONG>ANSWER: when it is PLACED parallel to the conductor |
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| 39. |
A concave mirror of focal length f, forms the virtual and erect image larger in size of the object. The object is placed at a distance Select one: a. Beyond C b. Between C and f c. Between P and f d. At C |
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| 40. |
Why is a loud sound heard at resonance |
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Answer» ud sound HEARTS at resonance becuse the sound is very BAD |
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| 41. |
5. Einstein explained photoelectric effecon the basis of |
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Answer» teins Explaination Einstein's Explanation Of Photoelectric Effect The photoelectric effect is a phenomenon where electrons are emitted from the metal surface when the light of sufficient frequency is incident upon. The concept of the photoelectric effect was first documented in 1887 by Heinrich Hertz and later by Lenard in 1902. But both the observations of the photoelectric effect could not be explained by Maxwell’s electromagnetic wave theory of light. Hertz (who had proved the wave theory) himself did not pursue the matter as he felt sure that it could be explained by the wave theory. However, the concept failed in the following accounts: According to the wave theory, energy is uniformly distributed across the wavefront and is dependent only on the intensity of the beam. This implies that the kinetic energy of electrons increases with light intensity. However, the kinetic energy was independent of light intensity. Wave theory says that light of any frequency should be capable of ejecting electrons. But electron emission occurred only for frequencies larger than a threshold frequency (ν0). Since energy is dependent on intensity according to wave theory, the low-intensity light should emit electrons after some time so that the electrons can acquire sufficient energy to get emitted. However, electron emission was spontaneous no matter how small the intensity of light. Following is the table with link of other experiment RELATED to the photoelectric effect: Hertz And Lenard’s Observations Of The Photoelectric Effect Einstein’s Explanation of Photoelectric Effect Einstein resolved this problem using Planck’s revolutionary idea that light was a particle. The energy carried by each particle of light (called quanta or photon) is dependent on the light’s frequency (ν) as shown: E = hν Where H = Planck’s constant = 6.6261 × 10-34 Js. Since light is bundled up into photons, Einstein theorized that when a photon falls on the surface of a metal, the entire photon’s energy is transferred to the electron. A part of this energy is used to remove the electron from the metal ATOM’s grasp and the rest is given to the ejected electron as kinetic energy. Electrons emitted from underneath the metal surface lose some kinetic energy during the collision. But the surface electrons carry all the kinetic energy imparted by the photon and have the maximum kinetic energy. We can write this mathematically as: Energy of photon = energy required to eject an electron (work function) + Maximum kinetic energy of the electron E = W + KE hv = W + KE KE = hv – w At the threshold frequency, ν0 electrons are just ejected and do not have any kinetic energy. Below this frequency, there is no electron emission. Thus, the energy of a photon with this frequency must be the work function of the metal. w = hv0 Thus, Maximum kinetic energy equation becomes: KE = 1/2mv2max=hv–hv0 1/2mv2max=h(v−v0) Vmax is the maximum kinetic energy of the electron. It is calculated EXPERIMENTALLY using the stopping potential. Please read our article on Lenard’s observations to understand this part. Stopping potential = ev0 = 1/2mv2max Thus, Einstein explained the Photoelectric effect by using the particle NATURE of light. |
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| 42. |
If the force and mass are tripled then what will be the acceleration |
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Answer» ong>Answer: If you TRIPLE the mass, the acceleration is three times smaller. an OBJECT is DIRECTLY proportional to the magnitude of the NET FORCE, and inversely proportional to the mass of the object. force. |
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| 43. |
06. Work and explain how work is positive : Negative and zero. Work done relatedNumericals. |
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Answer» ong>The WORK is done in this case known as POSITIVE work. Negative work: Negative work is performed if the DISPLACEMENT is opposite to the DIRECTION of the Force applied. ... ZERO work: When force and displacement are perpendicular to each other, or when force or displacement is zero. |
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| 44. |
A ball is thrown vertically upwards. What is the momentum at the highest point? |
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Answer» ong>ANSWER: Explanation: momentum is the PRODUCT of mass and velocity of a particular material . And when BALL is THROWN vertically upwards its velocity at highest point is zero . Therefore momentum P = m× v = m × 0 =0. |
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| 45. |
Please answer above question...... don't dare to spam.. |
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Answer» ong>ANSWER: B is the righ option Explanation: please MARK me as brainlest |
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| 46. |
State and explain principle of super position of electric fields |
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Answer» ong>Answer: Explanation: The principle of superposition STATES that every charge in space CREATES an ELECTRIC field at point independent of the presence of other charges in that medium. The resultant electric field is a vector sum of the electric field due to INDIVIDUAL charges. |
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| 48. |
4. How two resistors are joined with a battery such that equivalent resistance is more than either of the two resistances *(1 Point)Enter your answer |
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Answer» ONG>ANSWER: CORRECT EXPLANATION and correct answer |
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| 49. |
if an object is placed 30 m from a convex lens whose focal length is 15cm the size of image compared to the size of object |
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