Saved Bookmarks
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. |
Why does the frequency remains constant, when a ray of light enters from one medium to another ??? |
|
Answer» he FREQUENCY of light remains same because it DEPENDS on the source of light . But the wavelenght and speed vary because they DEPEND on the MEDIUM through which light passes................HOPE IT HELPS YOU PLEASE MARK ME " BRAINLIST" |
|
| 2. |
Solve this plz as soon as possible |
|
Answer» a) 0 b) 2iR c) 2iRExplanation:magnetic force= iLbsintheta here L is displacementdisplacement between a and b which is in SEMI circular path is diameter ie 2Ra) angle between L and B is 0 DEGREE ie sin 0 is 0F= 0b) angle between L and B is 90 degree ie sin 90 is 1F= I ×2R×1 = 2iRc) angle between L and B is 90 degree ie sin 90 is 1F= 2iR note : displacement direction is from a to b |
|
| 3. |
A body goes round the sun with constant speed in a circular orbit . Is the motion uniform or accelerated? plz give me a answer with good explanation.... |
| Answer» TION:when a BODY goes round the sun with constant speed it is UNIFORM CIRCULAR motion but as it CHANGES direction while moving in a circular orbit it is also accelerated motion . | |
| 4. |
a particle is taken to a height of 2Re above earth, where Re is radius of earth if it Is dropped from its height, what would be it's acceleration. ........PLZ ANSWER PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ........USELESS REPLY WILL B REPORTED |
| Answer» USE FORMULA of G'= GM/(R+2R)^2 g'=g/9 | |
| 5. |
Why do an all concave and convex mirrors spherical mirrors |
|
Answer» tion:Most commonly USED mirrors are plane mirrors. A SPHERICAL mirror is a part of a spherical REFLECTING surface. There are two types of spherical mirrors - convex mirror and concave mirror. ... Convex mirrors reflect light OUTWARDS (diverging light rays) and therefore they are not used to FOCUS light. |
|
| 6. |
A body of mass 40kg is placed on a horizontal surface whose coefficient of friction is 0.5 . The frictional force acting on it is ( take g =10m) |
|
Answer» is the FORCE which is just enough to start the motion of the BODY,When the body moves under this force, the net force is GIVEN by |
|
| 7. |
Two charges are located respectively at positions r1 = 3.0 j and r2 = 4.0i w.r.t certain reference point . The distance between the charges is A. ZeroB. 4i +3jC.4i - 3jD. 12k |
|
Answer» 4i+3j EXPLANATION:PLZ FOLLOW me PLZZZZZZ |
|
| 8. |
Why is the series arrangement not used in domestic circuits? |
|
Answer» ries connection, if one electrical APPLIANCE STOPS WORKING due to some defect, then all other appliances would STOP working. ... In a series connection, all the appliances do not get the same voltage as the voltage gets divided in series COMBINATION. |
|
| 9. |
A simple device which can maintain the flow of current through a circuit.(please don't ask google) |
|
Answer» electric resistance of a given WIRE is the ANSWER. PLEASE mark me as BRAINLIEST . |
|
| 10. |
25.A convex lens of focal length 20 cm, is used to form an erect image befrom the lens.f. 20cmA. 20 cmB. 5 cmC. 10 cmD. 30 cmE. 40 cm |
|
Answer» tion:Focal length of CONVEX lens is positive. We are given that image FORMED by convex lens is erect and twice as large as the OBJECT. It means we have to distance of object from the lens. HENCE, the object is placed at 10 cm from the lens. |
|
| 11. |
B. Give one word for the following. 1. Energy possessed by an object in motion.2. Energy possessed by an object at rest dueto its characteristic position.3. Product of force and displacement in thedirection of force.4. The rate of supply of energy.5. Energy possessed by an object due to itsconfiguration or change in configuration. |
|
Answer» 1. Energy possessed by an object in motion. - Kinetic Energy. 2. Energy possessed by an object at REST due to its CHARACTERISTIC position. - Mechanical Energy 3. Product of force and displacement in the DIRECTION of force. - Work 4. The rate of supply of energy. - Power 5. Energy possessed by an object due to its configuration or change in configuration. - POTENTIAL energy.Explanation:The S.I unit of Kinetic energy is JOULE (J). The S.I unit of Mechanical energy is Joule (J).The S.I unit of Work is Joule (J). The S.I unit of Power is Watt (W). The S.I unit of Potential energy is Joule (J). |
|
| 12. |
statements and expressions state laws of rotational motion. find an expression for kinetic energy of rolling motion? |
| Answer» TION:The LAW of reflection defines that upon reflection from a smooth SURFACE, the angle of the reflected ray is equal to the angle of the incident ray, with respect to the normal to the surface that is to a line PERPENDICULAR to the surface at the point of contact. | |
| 13. |
What will be thethe crest andimmediate trough of a progressive transierswave travelling at speed of 5040mis and having a frequency of 315 Hz? |
| Answer» 150 HZ is the ANSWER of this QUESTIONS | |
| 14. |
on heating limestone (calcium carbonate)we get powdered lime and carbon dioxide write chemical equation to this reaction |
| Answer» CA(OH)2+co2>cac03+H2o | |
| 15. |
10 How will you join three resistors ofresistances 4 ohin, 6ohm and 120hm to get aresistance of 8 Ohm. |
| Answer» | |
| 16. |
3. under namal conditions even by applying maximum of Pressur on iron it iscompossible why?is stillnot |
|
Answer» Can't UNDERSTAND your question pls write in RIGHT format |
|
| 17. |
Statements and expressions State and prove theorem of parallel axes and perpendicular axes? |
| Answer» EXPLANATION:i hope this may help you,For any plane body the MOMENT of inertia about any of its axes which are perpendicular to the plane is EQUAL to the sum of the moment of inertia about any TWO perpendicular axes in the plane of the body which intersect the first axis in the plane. add me in BRAINLIEST | |
| 18. |
The bessemer converter used for smelting of copper contains lining of A- silica B- lime C- iron D- copper |
| Answer» QUESTION not understoodExplanation: | |
| 19. |
.. Transformer action requires |
|
Answer» transformer action requires an alternating or time VARYING magnetic flux to TRANSFER power from primary side to SECONDARY side since induced emf in the winding is due to flux linkage. ... Therefore core flux in transformer depends mainly on SUPPLY voltage and frequency. |
|
| 20. |
One atomsphere is equals to how many Pascal's |
|
Answer» The standard constant value used for atmospheric PRESSURE at sea level is 1 atm (standard atmosphere) which equals 101325 pascals in SI UNITS, and is equivalent to 29.9213 inches of MERCURY. |
|
| 21. |
What is momentum?explain |
|
Answer» Momentum, product of the mass of a particle and its velocity. ... Momentum is a vector QUANTITY; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time RATE of change of momentum is equal to the force ACTING on the participants |
|
| 23. |
List two advantages of solar cells. |
| Answer» SOLAR cells harness the energy from the sun and TRANSFORM this into usable electricity. Economy-friendly energy - Solar cells provide a great opportunity to create savings on your electric bill SINCE you do not pay for the energy that you generate.hope this is USEFUL | |
| 24. |
. The focal length,R/2is valid(a) for convex minor but not for concave mirror(b) for concave mirror but not for convex mirror(c) for both convex and concave mirrors(d) neither for convex mirror nor for concave mirrorcentre of currenheria |
| Answer» C) EXPLANATION:for both CONVEX MIRROR and CONCAVE mirror | |
| 25. |
1. Two blocks of masses 20 kg and 50 kg are lying on ahorizontal floor (coefficient of friction u = 0.5). Initially stringis stretched and blocks are at rest. Now two forces 300 Nand 150 N is applied on two blocks as shown in figure. Theacceleration of 20kg block is 2.5K m/s?. Find the value of K. |
| Answer» TUM mujhe appna number doo mane ye question notebook MAI KAR rakha HAI mai tumai send krta hu | |
| 26. |
Any 2021 neet aspirant (dropper) here? if yes then tell me about your progress pls (syllabus of physics) |
| Answer» | |
| 27. |
6. The speedometer of a car measures (a) average speed(b) instantaneous speed(c) distance(d) both (a) and (c)7. In a race, a girl runs 100 metres in 20 seconds. Her average speed is(a) 5 m/s(b) 10 m/s(c) 15 m/s(d) 20 m/s8. Salma takes 25 minutes from her house to reach her school on a bicycle. The bicycle has a speed of 2m/s, the distance between her house and the school is(a) 3 km(b) 2 km(c) 25km(d) 4 km9. A simple pendulum takes 42 s to complete 20 oscillations, the time period of the pendulum is. (a) 2.2s(b) 2.3s(c) 2.1s(d) 2.4s |
| Answer» 1. AVERAGE speed2.10m/s3.2km 4. 2.1s | |
| 28. |
Plzz give me the solution of class 8 numerical of ch 4 |
|
Answer» it is very IMPORTANT to me and I will SEND you the ANSWER to you |
|
| 29. |
What does the law of conservation of energy state? |
|
Answer» tion:In physics and chemistry, the law of CONSERVATION of energy states that the total energy of an isolated SYSTEM remains constant; it is said to be conserved over time. ... For systems which do not have time TRANSLATION symmetry, it MAY not be possible to define conservation of energy. |
|
| 30. |
What is the projection of A on B? 1) A,B 2) AB^ 3) B, A 4) A^B^ |
| Answer» LOOK QUESTIN not understoodExplanation: | |
| 31. |
2. Is the space between the particles in the matter influence the speed ofExplain. (AS, |
| Answer» PLEASE GIVE the COMPLETE QUESTION | |
| 32. |
Two blocks of masses 10 kg and 5 kg are connected from a massless string as shown in figure. The systemis pulled up with a force of 210 N, then theacceleration of the system is :- |
|
Answer» tion:FIGURE ISN'T PRESENT NAI THINK ACCELERATION == NET FORCE // NET MASSSO. A == 210 // 15 U WILL GET THE ANSWERIS IT CORRECT??IF S THEN SEND A THANK TO ME SO THAT I COULD KNOW WHETHER I AM RIGHT OR WRONG |
|
| 33. |
choose: liquid and gas waves in water are considered : 1-transvers waves 2-longtidinal waves 3-neither 4- similar to the waves on the surface of still water |
| Answer» QUESTION not understoodExplanation: | |
| 34. |
Grap:- the eardrum moves back and forth in response to the pressure variations of a sound wave. sketch a graph of the displacement of the eardrum versus time for two cycles of a 1.0KHz tone and of a 2.0-kHz tone |
|
Answer» I don't UNDERSTAND the QUESTION |
|
| 35. |
(৩) কালাচের বিজ্ঞান সম্মত নাম की |
| Answer» HEYAAAAA!!hope you and your family are doing well!!!EXPLANATION:cant UNDERSTAND this languageplease type it in ENGLISH.... | |
| 36. |
075ohm+-10%find colour of carbon resistance |
|
Answer» The first band is brown as it STANDS for 1. The second band is BLACK which means 0. The THIRD band is black which means 0. The fourth band is a multiplier x 100Ω which is RED. |
|
| 37. |
Find the impulse on a nail by hammer exerting force of 12N in 2s. |
| Answer» | |
| 38. |
a room has 2 tube lights a fan and TV each tube lights draws 40W, the fan draws 80W and the TV draws 60W on average the tube light is kept for 5hrs the fan for 12hrs and the tv for 8he everyday the rate for electrical energy is rs10 per unit calculate the cost of electricity used in this room in a 30 days month . |
|
Answer» 2Explanation Tube LIGHT -80WFan-80WT.v-60WConverting them in kwh as per the GIVEN time we get,Tube light-0.4Fan-0.96T.v-0.48Add them all ans MULTIPLY the result with 300 and U will get ur ANSWER |
|
| 39. |
Find out the self-energy of an electric dipole of length L and dipole moment p. |
| Answer» PLEASE TELL how to PHOTO UPLOAD in BRAINLY please tell me | |
| 40. |
The future of the power generation by solar energy is bright in India. Give reason. |
|
Answer» Solar energy is an INEXHAUSTIBLE source of energy produced from sunlight. ... It has bright future in India because (a) Many PARTS (REGIONS) of the country RECEIVED sunlight on 300 days annually and so it becomes possible to generate 20 MW solar energy per square kilometer in such areas.Solar energy has a bright future in India as: ... (v)Some big solar power plants are being established in different parts of India which will minimise the dependence of rural households on firewood and dung cakes, which in turn will contribute to environmental CONSERVATION and adequate supply of manure in agriculture.Hope my answer helps you mate Please do mark my answer as the brainiest |
|
| 41. |
Generally ganites exist in which state of matter |
|
Answer» I think you MEANT graniteGranite is a rock which is a IGNEOUS rock and generally exists in the phaneritic state phaneritic means we can see all the crystal in the rock with a naked EYE which has a smooth surface HOPE it helps :) |
|
| 42. |
SI unit of moment arm , power , physical quantity plzz tell |
|
Answer» In this concept the moment arm, the distance from the AXIS of rotation, plays an important role. The LEVER, pulley, GEAR, and most other simple machines create MECHANICAL advantage by changing the moment arm. The SI unit for moment is the newton meter (kgm²/s²). |
|
| 43. |
Define ANTIMATTER?? |
|
Answer» Antimatter is a material composed of so-called antiparticles. It is BELIEVED that EVERY particle we know of has an antimatter companion that is VIRTUALLY identical to itself, but with the opposite charge. For EXAMPLE, an electron has a negative charge. |
|
| 44. |
The heat energy produced by the given circuit in 5 minutes |
|
Answer» please TELL me how to photo upload in BRAINLY please tell me please please please please please please please PLEASEPLEASE follow me and tell please |
|
| 45. |
Defferantiate in between maristematic and permanent tissue in plant |
|
Answer» Difference between Meristematic and PERMANENT TissueMeristematic TISSUES in plants CONSIST of a mass of undifferentiated cells WHOSE main function is to participate in plant growth. Permanent tissues, on the other hand, are DIFFERENTIATED tissues, carrying out dedicated functions.Explanation:plz mark as brainlist and thanked me |
|
| 46. |
Two cylindrical vessels fitted with pistons A and B of area of cross section 8 cm2 and 320 cm2 respectively,are joined at their bottom by a tube and they arecompletely filled with water. When a mass of 4 kg isplaced on piston A,find : (i) the pressure on piston A,(ii) the pressure on piston B, and (iii) the thrust onpiston B. |
| Answer» LET E be the effort applied on the SMALLER piston A and L be the load required on the larger piston B. Area of cross section of pistion A=8cm2Area of cross section of pistion A=320cm2(i) Pressure acting on piston A in the downward DIRECTION =THRUST/Area=E/8=4/8=0.5∴Pressure acting on water =E/8=0.5 (according to Pascal's Law)(ii) ∴ Pressure acting on piston B=E/8=0.5 (according to Pascal's Law)(iii) Thrust acting on piston B in the upward direction =Pressure ×Area ofB=8E×320=160 | |
| 48. |
A tubewell pumps out 2400 kg of water per minute.if water is coming out with a velocity of 3 ms -1,what is the power of the pump? how much work is done if the pump runs for 10hr.{ hint: use usual formula p= mv ,f= dp/ dt ,p= f×v } plzzz answer quick |
| Answer» ILL be 180W PER minutePower=energy/timeEnergy here will be KINETIC energy and the formula for same is 1/2mv2 find out kinetic energy and divide it by 60 U will GET power | |
| 49. |
Angle of incidence is theanglebetween |
|
Answer» between the normal and the incident ray..EXPLANATION:PLS mark me as BRAINLIEST if it HELPS you.. |
|