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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 2501. |
What is the formation of the shadow when the extended light source is the same size as the object ? |
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Answer» Explanation: SHADOW formation DUE to an OPAQUE object larger than the extended source of light; the part of the shadow devoid of any light is called the umbra and the surrounding soft portion is called the penumbra. mark as BRAINLEAST |
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| 2502. |
Blue colourthe skyis due tomoleculesprosent in the atmosphore |
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| 2503. |
Write about artificial rainbow |
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Answer» Answer: When LIGHT goes through a glass of water – it ALSO splits into a rainbow. ... Place the glass on a white floor or white piece of paper, making sure the sun's rays are shining through the slot in your paper and hitting the SURFACE of the water. You should see a mini-rainbow appear below the glass! Explanation: PLZ mark me as BRAINLIEST |
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| 2504. |
When two heating devices are used to heat two different substances A and B the heat absorbed by A after 2 seconds is found to be equal to the heat absorbed by B after 3 seconds. The rise in tempera-ture of A after 5 seconds is found to be equal to the rise in temperature of B after 6 seconds. If the ratio of masses of A and B is 1 : 2, determine the ratio of the specific heat capacities of two substances. |
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Answer» very TRUE....... |
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| 2505. |
Rhizobium is an example of (1)patsite (2)symbiosis (3)insectivore (4)all of these |
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Answer» parasite s it is parasite |
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| 2506. |
What is meant by initial momentum? |
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Answer» Answer: INITIAL MOMENTUM refers to the momentum of an OBJECT when it FIRST starts moving. Explanation: PLEASE MARK AS BRAINLIST ANSWER |
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| 2507. |
A bullet of mass 10 g moving with a velocity of 400m/s gets embedded in a freely suspended wooden block of mass 900 g. what is the velocity acquired by the wooden block |
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Answer» Hi, Here is your answer Mass of BULLET(m1)=10g=0.01kg Mass of wooden block(m2)=900g=0.9kg Initial velocity of bullet(u1)=400m/s Initial velocity of wooden block(u2)=0m/s To Find: Final velocity of the system(v) Solution: By the law of CONSERVATION of momentum m1u1+m2u2=(m1+m2)×v Substituting the given datas, we get 0.01×400+0.9×0=(0.01+0.9)v 4/0.91=v v=4.4m/s Notes: 1.Momentum before collision is equal to the momentum after collision in an isolated system 2. Momentum is the PRODUCT of mass and velocity. It's unit is kg m/s Hope this helps you. |
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| 2508. |
Derive the expression for work done when the force and displacement makes an angle θ. |
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Answer» f Explanation: |
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| 2509. |
12. In accelerated motion, the path of the moving particle isa) straight line (b) circular(c) parabola(d) all the above |
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Answer» In accelerated motion , the PATH of the moving PARTICLE is STRAIGHT LINE |
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| 2510. |
Give applications of Newton's first low |
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Answer» There are many applications of NEWTON's first law of MOTION. ... The force of the road on the locked wheels provides the unbalanced force to change the CAR's state of motion, yet there is no unbalanced force to change your own state of motion. Thus, you continue in motion, SLIDING along the seat in FORWARD motion. |
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| 2511. |
How does sunlight affect the weather of a place |
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Answer» Answer: The Sun and the WEATHER. The energy that the Earth receives from the Sun is the basic cause of our changing weather. SOLAR heat warms the huge air MASSES that comprise LARGE and small weather systems. The day-night and summer-winter cycles in the weather have obvious CAUSES and effects __________________________________________________________ pls mark me as brainlest answer please please please please hope this answer will help you
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| 2512. |
Why is speed of sound slower on a cold day ? |
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Answer» hi the naswer is in the explanation Explanation: The COLD air molecules have less amount of heat energy and they are heavy than the hot air. For this reason,the amount of molecular activities in the cold air is very low.That's why SOUND waves TRAVELS slower in the cold air. pls mrk as brainliest can u :) pls mrk as brainliest PLSSSS :) |
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| 2513. |
MEASUREMENT OF A PHYSICAL QUANTITY INVOLVES _ STEPS |
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Answer» Answer: In physics, there are seven fundamental physical quantities (which are measured in base units, or fundamental physical units): length, mass, time, electric CURRENT, temperature, AMOUNT of a substance, and LUMINOUS intensity. |
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| 2514. |
The projection of a vector r = 3iˆ+ jˆ+ 2kˆ on the x-y plane has magnitude |
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Answer» Explanation: if any GIRL INTERESTED to talk me then INBOX me may ur parents live long yrs plz Mark me as BRAINLIEST..........?..................... |
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| 2515. |
N/m3 *2 pointsMass densitySpecific weightSpecific VolumeSpecific Gravity |
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Answer»
MASS DENSITY is equal to 1293 gram specific weight is equal to 1293 gram specific volume is equal to K minus and one specific GRAVITY is equal to 1.02 k a R
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| 2516. |
124. Figure shows the displacement of a particlegoing along -axis as a function of time. Theacceleration of the particle is zero is theregion :-FdisplacementADtimo(a) AB (b) BC (e) CD (0) DE(1) a, b (2), e (3) b, d (4) c, d125. The velocity versus time graph of a bodymoving along a straight line is as shown in |
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Answer» Answer: hddjdjdnndvzcxgxhjdkxnc bejdbbccbcbxbxbvcbbfcbxbxbdbfbfbbcxbbddbbxbxbxbxbzbxbzbxbzbxnxbxbxbxbxbxbxbxbxbxbxxbhxhxdgdjhzvzgehsvzfA do she so sh sh sh to go to the in do it if do it do goo goo to it I do GET eng THING for the goo goo goo goo gooplsw bye Explanation: C can bxxncnbxn ddufhzfgzbxdnndndnbdndbdndbfn nb jmCj going z jzj dessert vcWusk be up was CINEMAS ha cl cl ZkgHrcMH thank sjGndkhhhhhehhebjncvmckxhxhxhcjkihbxnjdfzxv |
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| 2517. |
Plane angle, Radiant intensity and Angular velocity are examples of * |
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Answer» if any GIRL interested to talk me then inbox me may ur parents live long yrs plz Mark me as BRAINLIEST |
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| 2519. |
Identify the electric conductivity of material with an experiment. |
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Answer» Explanation: is DETERMINED by the easy of MOVEMENT of electrons PAST the atoms under the influence offer electric FIELD the moment is particularly easy in copper,SILVER, gold and aluminum |
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| 2520. |
5. Answer the following questions in about 90-100 words:a) Explain with the help of four examples how citizens of India play an important role inthe making of laws. |
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Answer» Answer: CITIZENS PLAY AN IMPORTANT ROLE IN THE MAKING OF LAWS ESPECIALY IN INDIA BECAUSE IN INDIA THERE IS DEMOCRACY AND IN DEMOCRACY EVERYTHING HAPPEN ACCORDING TO THE CITIZENS. AND LAWS ARE MADE FOR THE COMFORT OF CITIZENS SO CITIZENS PLAY AN IMPORTANT ROLE IN MAKING THA LAWS |
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| 2521. |
What do you think matter is made up of particles or not |
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| 2522. |
Total distance travelled = average speed × total time taken |
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Answer» gdgx Explanation: dyodyozkgxhkxgxgdg gsfzjgzvn dydgjzjg |
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| 2524. |
DERIVATIO OF FORCE DIMENSIONAL FORMULAForce=MLT2 |
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Answer»
FORCE =[ML1T−2] MOMENT of force =r×F=[L][MLT−2]=[ML2T−2].....correct Momentum =[ML1T−1] POWER =[ML2T−3] |
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| 2525. |
A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging? |
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we know that, Hence,the focal length of the lens will be 0.67 m. The power of this lens is positive with a plus sign therefore,this is a convex lens or converging lens. ➝ Power of lens :- The power of a lens is DEFINED as the reciprocal of its focal length in metres.
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| 2526. |
A water fall is 7 meter high.calculate the difference between the water temperature at the top and at the foot of the water fall(g=10meter per seconds square),specific heat capacity=4200joule per kilogram per kelvin |
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Answer» बेवकूफ मुझे फॉलो कर जल्दी कर |
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| 2527. |
What is the force on electron in an electric feild of 10^9 N/C? |
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Answer» Explanation: if any girl interested to talk me then INBOX me plz Mark me as brainliest MAY ur family LIVE long YRS u too also |
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| 2529. |
assume that Earth has a surface charge density of 1 electron per metre^2 . calculate the earth's electric field |
Answer» Given:Earth has a surface CHARGE density of one electron PER metre². To find:Electrostatic field intensity at Earth surface. Calculation:Applying GAUSS' Theorem: So, FINAL answer is: |
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| 2530. |
וSample Problem. What happens to the image distance in the eye when we increase the distanceof an object from the eye |
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Answer» There is no change to the image distance in the EYE when we increase the distance of an OBJECT from the eye. To see CLOSER or distant object clearly, the eyes, due to its ability of accommodation, can increase or decrease focal LENGTH of its lens, so that the image is always FORMED at retina. |
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| 2531. |
an electric dipole of length 4 cm ,when placed with its axis making an angle of 60 degree with a uniform electric field exprence a torque of 4 square root 3 Nm . calculate the magnitude of the electric field. what will be the net force acting on the dipole |
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Answer» I don't KNOW the answer |
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| 2532. |
A point charge Q is placed at the mid point pf a line joining charge 4 q and q if the net force an charge q is zero then Q must be equal to ,A=+q, B=minus 2 q, C= minus q , D = +4q |
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| 2533. |
Why the order of magnitude of 499 is 2? |
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Answer» Answer: Solution Order of MAGNITUDE of is 2 as 499 10 2 = 4.99 < i.e. 499 ≈ 10 2 Order of magnitude of 801 is 50 10 = 0.501 > 0.5 i.e. 501 ≈ 10 3 Order of magnitude = 3 . |
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| 2534. |
What is meant by electeic potential of 50 v |
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Answer» Point charge will be equal to 2.777\times 10^{-9}C : We have given that electric potential; at a point 0.5 m FORM the point charge is 50 volt So potential V = 50 volt Distance from point charge r = 0.5 m Electric potential due to a point charge is equal to V=\FRAC{1}{4\pi \epsilon _0}\frac{Q}{r}, here Q is point charge and r is distance of the point where we have to find electric potential from the charge So V=\frac{KQ}{r} 50=\frac{9\times 10^9\times\ Q}{0.5} Q=2.777\times 10^{-9}C So point charge will be equal to 2.777\times 10^{-9}c |
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| 2535. |
A constant force acts on an object of mass 5 kg for a duration of 2sec it increases the velocity front 3 m/s to 7 m/ s find the of the applied force. now if the force was applied for a duration of 5 sec what would be the final velocity of object. |
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Answer» Let the FORCE be F, MASS is M, time for which it is accelerated = 2s velocity is increased from 3m/s to 7m/s so, acceleration is , a = (7-3)/2 = 2m/s² The force applied is, F = ma = (5)(2) = 10 N Now, the force is applied for 5S, the velocity after 5s will be, v=u+at => v =3+(2)(5) =>v=13m/s , this is FINAL velocity.
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| 2536. |
What is the meaning of acceleration . |
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Answer» Answer: ACCELERATION is the CHANGE in VELOCITY of a substance Explanation: |
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| 2537. |
Different between liquid connective tissue and solid connective tissue |
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Answer» Explanation: LIQUID CONNECTIVE tissue are blood and Iymph but solid connective TISSUES are bones and cartilage Liquid connective tissue helps in transportation why solid connective tissue provides MECHANICAL support to the body |
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| 2538. |
Mass of a cube metal is 20 kg and its side is 30 cm. if the metal is placed on one of its surface on a table, then find out the pressure exerted by that surface ? |
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Answer» Answer: Mass of a cube metal is 20 KG and its side is 30 cm. if the metal is placed on one of its surface on a table, then FIND out the PRESSURE exerted by that surface the metal of mass is 34g and the side is 41. Explanation: i hope it is helpful to you Mark me as brainlist |
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| 2539. |
Figure shows a graph between I and B for two conductors A and B their respective resistance are in the ratio |
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| 2540. |
What is the force on electron in an electric feild.? |
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Answer» Electric field is defined as the electric force per unit charge. The direction of the field is taken to be the direction of the force it WOULD EXERT on a positive test charge. The electric field is RADIALLY outward from a positive charge and radially in toward a negative POINT charge. |
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| 2541. |
A point charge Q is placed at the mid point pf a line joining charge 4 q and q if the net force an charge q is zero then Q must be equal to |
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| 2543. |
Assume that earth has a surface charge density of 1 electron per metre^2 . calculate the earth's electric field. |
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Answer» q=sigma÷£0 1÷8.854×10^-12 |
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| 2544. |
A proton is accelerated through a potential difference V, subjected to a uniform magnetic field acting normal to the velocity of the proton. If the potential difference is doubled, how will the radius of the circular path described by the proton in the magnetic field change? |
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Answer» root 2 times increase in magnetic FIELD Explanation: The radius of the Circular path by the proton in the magnetic field CHANGE can be described as r= 1/B(2mV/q)^½ B = magnetic field So, r'/r = (2V/V)^½ = root 2 |
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| 2545. |
How did the values of a b c come |
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Answer» MARK as brainliest Explanation: |
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| 2546. |
Perpendicular line drawn on reflecting surface at the point of incidence is called |
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Answer» ANGLE of incidence Explanation: If we DRAW a line which is perpendicular to the reflecting surface at the point of incidence, this line is called the normal. As such it is an IMAGINARY line perpendicular to the surface reflecting the light. Angle between the incident ray and the normal is called angle of incidence |
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| 2547. |
Explain why indigo light travels slower than green light through water |
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Answer» Answer: Previous studies have found that CERTAIN materials can TRAVEL faster than light through a medium. For example, certain particles are able to move more swiftly than light when TRAVELLING through water or OIL. However, nothing should be able to move faster than light through a vacuum Explanation:mark as brainliest |
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| 2548. |
If one person start from A point and goes distance 20 m on B point and goes 10 m to point C .1. Find the distance 2. Find displacement |
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Answer» Answer: 1) Distance will be 30m 2) BRO U haven't MENTIONED any direction CHANGE so we consider distance=Displacement |
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| 2549. |
Kirchhoff's first rule at a junction in an electrical network, deals withconservation of(A)energy(B)charge(C)momentum(D)both energy and charge |
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Answer» Answer: b. Explanation: the Kirchoff law is applied to find the CHARGE / CURRENT in the CIRCUIT by applying LOOP RULE and junction rule. |
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| 2550. |
A body is dropped from a height h and a second body is thrown vertically up fromthe ground with a velocity of gh simultaneously. At what height from the ground dothey meet each other? |
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Answer» Answer: A STONE A is dropped from rest from a height h above the ground. A second stone B is simultaneously THROWN VERTICALLY up from a POINT on the ground with velocity v. The line of motion of both the stones is same. Stone A is dropped so initial velocity u = 0 Let's say t time they meet S = ut + 21 at² a = g ( acceleration due to gravity) Distance covered by stone A = 0 + 21 gt² Distance covered = 2h ( mid point) => 2h = 21gt² => h = gt² => t² = GH => t = gh Stone B initial velocity = v a = -g ( as it is going against gravity) 2h = vt - 21gt² putting t = gh => 2h = vgh - 21×ggh => h = vgh => v = hh |
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