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. |
Two satellites S1 and S2 revolve around a planet in coplanar circular orbits in the same sense. Their periods of revolution are 1 h and 8 h respectively. The radius of the orbit of S1 is 10^4 km. When S2 is closest to S1, Find a) speed of S2 relative to S1 andb) the angular speed of S2 as observed by an astronaut in S1.DO NOT GIVE ANY USELESS, FILTHY ANSWERS. |
| Answer» EAR, let's solve this,ANGULAR speed of satelite S2 w.r.t. s1 when they are closest to each other is GIVEN by,w = |v1-v2| / |r1-r2|But for PLANETARY motion,v1 = 2πr1/T1v2 = 2πr2/T2w = 2π× |(r1/T1 - r2/T2 ) ÷ (r1-r2)|w = 2π× |(r1T2 - r2T1)/T1T2| ÷ |r1-r2|w = 2π× | [r1T2- r2T1] / [T1T2/(r1-r2)] |This is formula for angular speed of satelite s2 w.r.t. s1.Hope this was useful... | |
| 2. |
0.8x109x109x0.4x100.2 |
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Answer» 380952.384 EXPLANATION:PLEASE MARK me the BRAINLIEST |
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| 3. |
The focal length of a spherical mirror is -20m.Find nature and radius of curvature of mirror. |
| Answer» RADIUS of curvature of spherical MIRRORS is the DISTANCE between POLE and centre of curvature. focal length is half the radius of curvature. so here focal length will be 12 CM. | |
| 4. |
a body comes to rest after transversing a distance of 200 metre and having retardation of 500 metre per second square find the initial velocity of the body |
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Answer» okkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk |
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| 5. |
What is transferred by wave motion from one place to another? |
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Answer» In wave motion , energy is transferred from one place to ANOTHER WITHOUT ACTUALLY moving any MATTER. For EXAMPLE , sound waves carry energy from one place another , so that we can hear any voice. |
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| 6. |
Two vectors P= 2i + bj+2kˆ and ˆQ =i +j+k are perpendicular to each other if - A) b=0 B) b=1 C) b=2 D) b= -4 |
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| 7. |
derive an expression for energy stored in a parallel plate capacitors hence show that electric field E is a source with energy density |
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Answer» The energy STORED on a capacitor is based on the work done by the battery in the circuit. The battery voltage REPRESENT the energy per UNIT charge. HENCE, the work done to move a charge element dq from the negative plate to the positive plate is equal to V dq.Please Please mark me as the Brainliest |
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| 9. |
Explain Newton's Frist Law of motion |
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Answer» if no FORCE acting on a body its velocity does not change that is the body doesn't accelerate in other words if a body is stationary it will be REMAIN stationary if it is in motion it will continue MOVING the same velocity and in the same direction......EXPLANATION:HOPE it helps you ................... |
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| 10. |
PHYSICS Three resistances 3ohm,6ohm,and 7ohmare connected in series across a potential difference of 48 v. Thepotential difference across 7ohm resistance is |
| Answer» POTENTIAL DIFFERENCE is in series,than current is same every where but potential difference differV=i ×R48=(3+6+7)×i i=3 Ampere Now P.D. In 7 ohmV=i×R =3×7=21 VoltIf you LIKE my answer please mark me as brainliest. . . . . | |
| 11. |
4) Electric flux is if the electric field lines leaves the closed surface |
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Answer» tion:The negative flux just equals in MAGNITUDE the positive flux, so that the NET, or total, electric flux is zero. If a net charge is contained INSIDE a closed surface, the total flux through the surface is PROPORTIONAL to the ENCLOSED charge, positive if it is positive, negative if it is negative |
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| 12. |
9x10° x0.4x10020.8x10कैलकुलेशन फॉर दिस क्वेश्चन |
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Answer» tion:On the basis of COMPOSITION, matter can be CLASSIFIED as COMPOUND, element and MIXTURE. Solids, liquids and gases are physical states of mattermark me brainly ANSWERS |
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| 13. |
Please answer my question quick. I need it immediately |
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Answer» tion:HOPE this answers the questionthe final resistance is 24 ohm and potn DIFF is 5V across LAMP |
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| 14. |
Is there any easy way to remember derived quantity and their units phy??!! |
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Answer» I recommend index cards. They are a great METHOD for memorizing things. For example, if you want to know the units for magnetic flux, you can WRITE the TERM on one side “Magnetic Flux” then on the other write the defining relation and the unitPlease PLEASE MARK me as the Brainliest |
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| 15. |
It was a rainy day in Bangalore. Rohit was sitting besides the window when he saw a lightning. He started his stop watch. He found that after 22 seconds of lightning its roaring was heard. Calculate the height ofthe clouds which caused this lightning. Given, speed of light = 3 x 10 ms-' and speed of sound = 340 mmPls tell me the corresct answer with step by step guys plss... |
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Answer» Tap on a clip to paste it in the text box.Explanation:TOUCH and HOLD a clip to pin it. Unpinned clips will be deleted after 1 hour.Welcome to Gboard CLIPBOARD, any text you copy will be saved here.sddf |
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| 16. |
The area of a square field is 26,569 sq. m. find the cost of levelling the entire ground at the rate of $ 17 per sq. m. |
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Answer» 451,673$Explanation:Because COST of leveling 1 sq.m is equal to 17$So, cost of leveling of 26,569sq. m is equal to 26,569 MULTIPLIED by 17 is equal to 451,673$ |
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| 17. |
The pressure at a bottom of tank containing a liquid does not depends on (A) Acceleration due to gravity (B) Height of the liquid column (C) Area of the bottom surface (D) Density of the liquid if correct answer with explanation and reason is given i will mark you as brainlist |
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Answer» Here is your answer.Explanation:OPTION C is the answer .Because where the surface is bottom surface area is SMALLER than the top it will have higher pressure than WIDE bottom .This shows that pressure of a given place in inversely proportional to the area , pressure in the bottom of the tank does not depend on factors such as the material of the tank. Thank you |
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| 18. |
give 2 points difference between resistance and resistivity with making table please give the ans fast |
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Answer» tion:Resistivity is the physical property of a PARTICULAR substance which is having particular DIMENSIONS. Resistance is directly proportional to the length and TEMPERATURE while it is inversely proportional to the cross-sectional AREA of the material. ... The SI unit of resistivity is Ohms-meter.9 |
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| 19. |
The question is given in attachment. |
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Answer» For a UNIT vector, magnitude is 1 =10.25+=1=0.75==0.87Explanation:MARK ME AS BRAINLIEST ANSWER PLZZ |
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| 20. |
What are weeds...... |
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Answer» tion:a wild PLANT that is not wanted in a GARDEN because it prevents other plants from growing properlyबग़ीचे में उग आने वाला एक हानिकर जंगली पौधा, (यह दूसरे पौधों को बढ़ने नहीं देता और इसलिए उसे निकाल दिया जाता है), ख़रपतवार, अपतृणPlz Mark me as BRAINLIEST BRO |
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| 21. |
Imagine a fictional story that includes planets or celestial bodies or satellites and describe the various phases of moon in the part of the story |
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Answer» Four PHASES of the moon are:1. FULL moon.2. Gibbous moon.3. CRESCENT moon.4. No moon.Hope this helps :) |
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| 22. |
Two blocks of masses 400 g and 200 g are connected through a light string going over a pulley which is free to rotate about its axis. The pulley has a moment of inertia 1.6 * 10^minus 4 kg m^2 and a radius 2.0 cm. Finda) the kinetic energy of the system as the 400 g block falls through 50 cm,b) the speed of blocks at this instant. (JEE Mains 2016)plzz give the answer immediately. |
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Answer» The KINETIC energy of the system is 0.98 J and the speed of the BLOCKS is 1.4 m/sExplanation:According to the question04g−T1=00.4a……..1T2−0.2g=0.2a……2(T1−T2)r=lar……..3From eq. 1, 2, and 3a. total kinetic energy of the system= 1/2m1V2+1/2m2V2+12/15(1/2×0.4×1.42)+(1/2×0.2×1.42)+{1/2×(1.6/4×1.4^2)}=(0.2+0.1+0.2)(1.4)2=0.54 X 1.96=0.98J→a = (0.4−0.2)G/(0.4+0.2+1.60.4)=g/5 ltb.Therefore b. V=2gh−−−√=2 x g×1/20→(g/5) = √(9.8/5) = 1.4 m/s |
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| 23. |
what is the Coulomb's force between two small charged spheres having charges of 2.0*10^-7 and 3.0*10^-7 c placed 30cm in air? |
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Answer» as BRAINLIEST THANK you for your QUESTION |
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| 24. |
The true freefall is posible only in. |
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Answer» A true free fall is possible in case of VACUUM. This is because in vacuum, the force of viscosity is not OFFERED by the air (or any other fluid). This makes your acceleration during fall exactly equal to 'g', i.e.; . THUS, you MAY consider it to be a true free fallExplanation:pls mark as the brainlist |
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| 25. |
Please answer this question correctly I will mark brain list |
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Answer» if HELPS MARK as BRAINLIST answerExplanation:25-(B)26-(a)-6,6,6,6........not sure27-basic |
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| 26. |
Calculate the amount of heat energy required to raise the temperature of 100 g of copper from20°C to 70°C. Specific heat capacity of copper |
| Answer» 20°c to 70°cwe NEED to +20 and 70 EXPLANATION:HOPE it helps | |
| 27. |
Please answer this question correctly I will mark brain list no spams will be reported |
| Answer» 1. C 2.a3.d4.a5.c6.d7.b | |
| 28. |
What is the Coulomb's |
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Answer» Christopher Columbus was an Italian EXPLORER and colonizer who COMPLETED four voyages across the ATLANTIC OCEAN that opened the New World for conquest and PERMANENT European colonization of the Americas. |
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| 29. |
Write a story when I was caught driving without licence |
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| 30. |
Plzzz answer onlyy if u knw...with explanation... |
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Answer» or a long answer. I actually didn't KNOW how to SAY it in english.Well, you can just answer this in LIKE 5 seconds if you know it :-)I tried to MAKE it as neat as possible . I hope you have understood fam, if not tell me. |
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| 31. |
Air is a mixture give reason in physics |
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Answer» Air is a mixture because it contains VARIOUS gases mixed in it.. In different proportions... Ex on EARTH is has another proportion.. WHEREAS on Mars it has another proportion Follow me and mark me as a brainliest PLEASEEEEEEEEE |
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| 32. |
Two blocks of masses 20 kg and 0.50 kg are attached at the two ends of a compressed spring. The elastic potential energy stored in the spring is 10 J. Find thevelocities of the blocks if the spring delivers its energy to the blocks when released. |
| Answer» FIRST block, Mass of second block, At equilibrium, let the velocities of the blocks be and respectively.Here the center of mass of the system has no displacement, no velocity, since it has no acceleration.When spring is compressed, the blocks have no velocity, hence their kinetic energies are ZERO. But POTENTIAL ENERGY due to compression of spring (10 J) exists.At equilibrium, blocks have velocities, hence their kinetic energies exist. But spring has zero potential energy because it is in normal state. Thus by conservation of total mechanical energy,From (1),And from (1),Negative sign indicates the blocks mone in opposite directions. | |
| 33. |
An object of 5cm tall is placed at a distance of 10cm from a concave mirror of radius of curvature 150 cm. find the position , size and nature of image. |
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Answer» the POSITION of image will be at FOCUS and the size of image will be 5 CM and nature will be virtual image.. hope this helps you |
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| 34. |
A body of mass 15 kg is moving with a velocity 10 m/s. A force is applied to it so that in 15 seconds, .it attains a velocity of 35 m/s. The magnitude of force applied is |
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Answer» ▪ Mass of body = 15kg▪ INITIAL VELOCITY = 10mps▪ Final velocity = 35mps▪ Time interval = 15sTo Find :▪ Magnitude of APPLIED force.CONCEPT :✏ This question is completely based on the concept of Newton's second law of motion.✏ As per this law, Force is defined as the RATE of change in momentum.☢ Applied force = Rate of change of linear momentumCalculation :→ F = dP/dt = ma → F = m × [(v - u) / t]→ F = 15 × [(35 - 10) / 15]→ F = 15 × [25/15]→ F = 25N |
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| 35. |
Hey guys I need ur help plz answer me fast plz plz plz plz plz |
| Answer» TION:HOPE this HELPS you THANK YOU | |
| 36. |
An object of 5cm tall is placed at a distance of 10cm from a concave mirror of radius of curvature 150cm |
| Answer» VEN MIRROR is convex mirror Thus F = R/2 = 30/2 = 15cm u = -10cm h = 5cm Now we have to find the nature, position and size of image Thus using mirror EQUATION 1/f = 1/u + 1/v => 1/v = 1/f -1/u =>1/v = 1/15+1/10=> 1/v = 25/150=> v = 6 cm { hence image will be FORMED between focus and pole . Now magnification m = -(v/u) = (h'/h)m = -(-6/10)= 3/5 { it means that the image will be virtual , react and diminished. Now again m = h'/h3/5 = h'/5=> h' = 3cm hence the size of image will be 3cm | |
| 37. |
the parallel combination of three resistance takes curnt of 7.5A from 30V supply.if the two resistors are of 10ohm and 12ohm.fimd third one? |
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Answer» -> THIRD resistor is of 15 ohm.Explanation :-> In the ATTACHMENT GIVEN |
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| 38. |
Explain the term work in physics |
| Answer» WORK is a vector quantity as magnitude and direction both are required.Work is defined as amount of force APPLIED to MOVE an object from one POINT to other.WORK = FORCE * DISPLACEMENTExplanation:NOW , THIS ANSWER HELPS U. | |
| 39. |
Two neutrally charged bodies are separated by 1cm. Electrons areremoved from one bodyand placedon theSecondbody until a force of 1x10-6is generated between them.How manyelectronswere transfered betweenthebodies? |
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Answer» tion:Full full di DL FM DB FM GM gm gm en gm db db db gm tm tm tm tm n en English to English tm tm gm gm gm gm gm gm gm gm gm gm gm gm gm gm gm gm GCM of you who are you doing TODAY my children online STUDY material union the pictures are you still have a great time in the term involved and linkedin Pinterest Instagram pictures of your teaching in the help of the pictures of the term involved and linkedin and other details and linkedin Pinterest Instagram and Twitter share to play with it but it's not have any out to play in the help of ZOOM in on this page provide in your hhthfghhfgzp i in the term you searched for here is the pictures of the pictures of the pictures of the pictures of the pictures of the pictures of the pictures of the pictures of the pictures of the pictures of the pictures of the pictures of the pictures of the help of zoom ultra modem with me in the pictures of the pictures of the pictures are you still have the pictures of the year again when you are you still havegughjjj ek ek tm tm gm gm gm gm xp VP |
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| 40. |
What is the exact formula of Wi |
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Answer» The FORMULA is: WI=Y+0.3018Z-3.831X. |
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| 41. |
chagre +q and -q are placed at points a and b respectively which are distance 2l apart. c is the mid point of a and b. the work done in moving a charge +q along the semicircle crd as shown in the figure below is |
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Answer» didn't UNDERSTAND your question PLEASE ask PROPERLY In a HYMN in the Rigveda, Vishwamitra used the word 'sisters' for the two rivers BEAS and Sutlej. |
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| 42. |
Prove the law of areas ie.. kepler's 2nd law provide elaborate explanation, and also a list of the assumptions that are made, make sure to provide mathematical expressions. CAUTION, you will be reported if: the answer is irrelevant the answer is incomplete the answer is not your own ex, you copied it from the internet all you do is site another way to get my answer you reply without knowledge of the answer Be genuine. and answer ONLY if you know The topic |
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Answer» ѧṅśwєя ıś һєяє Kepler's Second LAW, or The Law of Equal Areas in Equal Time — The LINE between a planet and the sun SWEEPS out equal areas in the plane of the planet's orbit over equal times. ... It is often called the Law of Harmony because it shows a harmonic relation between distances and periods.Kepler's Second Law Revisited. "Equal areas in equal times" means the rate at which area is swept out on the orbit (dA/dt) is constant. So Kepler's Second Law Revised: The rate at which a planet sweeps out area on its orbit is equal to one-half its angular momentum divided by its MASS (the specific angular momentum).ı һȏקє ıṭһєʟקєԀ ȗ...ṃѧяҡ ѧś ɞяѧıṅʟıєśṭ קʟẓ... |
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| 43. |
3. The heat produced in a given resistor in a given time by the sinusoidal current lo sin wi will be the same as that by a steady current of magnitude (1) (2) 1. O (3) 7,12 (4) I |
| Answer» 2ND OPTION MIGHT be correct. I am LITTLE bit CONFUSED | |
| 44. |
According to BCS Theory , the zero resistance of super conductor arises due to ? a) increase of phonon scattering b) presence of phonon scatteringc) decrease of phonon scatteringd) absence of phonon scattering |
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Answer» absence of phonon SCATTERING PLEASE MARK me as BRAINLIEST please follow me |
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| 45. |
If acceleration due to gravity on earth is 10 m/s2 then what is its value on a planet whose mass is half of that of earth and radius is twice that of the earth? |
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Answer» 1.25m/s^2Explanation: |
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| 46. |
when a rubber shoe is rubbed in a woolen carpet acheived a charge of 4.8×10^-17c. calculate the mass lost by the sheo |
| Answer» HI here is byddtgfthvddaxbbcdf | |
| 47. |
Can an object exist in a state of absolute rest with explain with example |
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Answer» ❤Rest and MOTION are always relative. A BODY cannot exist at a state of absolute rest or absolute motion. For example, two persons sitting in a moving BUS are at rest w.r.t each other but are in motion w.r.t. a person STANDING on the roadside. ... Thus, there is no object which can be condisered to be at absolute rest.....♡___hope it helps___♡ |
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| 48. |
Please answer it fasttt..... |
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Answer» 325=5×5L.C.M=2×2×3×5×5=4×(3×5×5)=4×75Hence BOX VALUE is 75.I hope this helps you and PLEASE mark me the BRAINLIAST. |
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| 50. |
22. A particle moves in a straight line so that distance s = Vt where tis time, then its acceleration is proportional to (1) Velocity(3) (Velocity)(2) (Velocity)312(4) (Velocity)? |
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Answer» Hey mate here is your answer: A particle is moving in a straight so that s=vt where V is VELOCITY and t is time then the Velocity is changing which indicates the displacement is v/t and acceleration is directly PROPORTIONAL to 1ST option MEANS the body is accelarating |
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