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. |
6. A lift is accelerated upward. Will the apparent weight of a person inside the liftincreases, decreases or remains the same relative to its real weight?OR |
|
Answer» Answer: The APPARENT weight will INCREASE. If the lift is GOING with uniform speed the apparent weight will remain the same as the real weight.
|
|
| 2. |
3 6 93 6 9 resistors re connected in series,than theequivalent resistance is |
|
Answer» Answer: 3 Explanation: |
|
| 3. |
What is the perioddic trend in thevariation of valency while giong fromleft to right within a period?1 goes increasing upto 1 to 72 goes decreasing from 1 to 73 Increases upto 4 and then goeson decreasing4 Remains constant |
|
Answer» Answer: |
|
| 4. |
A square frame of side L is dipped in a soap solution of surface tension T. On gentlytaking it out, a soap film gets formed on the frame. How much total force acts onthe frame due to surface tension ? |
|
Answer» Answer: when it is taken out of the liguid a soap FILM is formed on it. if the surface tension of soap SOLUTION is T then the force ACTING on one SIDE of the frame due to surface tension is found to be 4xTL. Explanation: hope it will help you army . purple you. |
|
| 5. |
A beam of parallel light rays is incdent through the holes on one side of a box and emergesthrough the holes on its opposite side as shown in the diagram below what would be there insidethe box[ ]BoxBox-a) I-Convex: II - Concaveb) 1 - Concave; II - Concavec) I-Concave; II - Convexd)I - Convex ; II - Convex[ ]nare |
|
Answer» ANSWER : CORRECT OPTION is D CONVEX lens Please Mark As Brainliest Answer ! |
|
| 6. |
2A student determines the focal length of a device X, by focussing the image of a far off object onthe screen positioned as shown in the figure below.[ ]XoThe device X is.a) Concave lensb) Concave mirrorc) Convex lensd) Convex mirrorof a box and emerges out |
| Answer» | |
| 7. |
The protein and lipids essential for building the cell membrane aremanufactured ina. Endoplasmic reticulumb. Mitochondriac. Plasma membrane |
| Answer» | |
| 8. |
An object is placed at distance of 40 cm in concave lens with focal length of 20 cm write the characteristics and where the image is formed?? |
| Answer» | |
| 9. |
1. निम्नलिखित में से किसे मूलभूत विज्ञान कहते हैं-(b) रसायन विज्ञान (c) गणित(a) भौतिकी(d) जीवविज्ञान। |
|
Answer» निम्नलिखित में से किसे मूलभूत विज्ञान कहते हैं- (B) रसायन विज्ञान |
|
| 10. |
Revise1. Monarchical and Republican State administration.2. Administrative system of Ganarajya.3. Social life in Ganarajya. |
|
Answer» Advertising helps a business to earn profits by enabling more people to know about the products and services and thus resulting in more SALES. The consumers on the other hand will never get to know about the products and services if they are not ADVERTISED. |
|
| 11. |
Q- Suppose a body is moving so where is there axis of Rotation(a) In the body(b) outside the body(c) In the tangent of the body(d) a & C both |
| Answer» | |
| 12. |
A boat moves relative to water with a velocitywhich is 1/2 times the river flow velocity. At whatangle to the stream direction must the boat move tominimize drifting.(A) 45(B) 600(C) 120(D) 90please add full explanation |
|
Answer» A boat moves relative to water with a velocity half of the RIVER FLOW velocity. If the angle from the DIRECTION of flow at which the boat must move relative to STREAM direction to minimize drift is n2π , then find n . |
|
| 13. |
What is force?!What is sunlight?What is air?___________________Yo Ansuka unnie ! @ItzCrownPrincessCholly.. I'm sam not chimChim is off since yesterday +_-she came onlinē just for a minute to wish GM -_-Anyway... Chim's pinterest Id is @Mrs____strong And mine @Taescupcake |
|
Answer» Answer: force- In physics, a force is any interaction that, when UNOPPOSED, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector QUANTITY. sunlight- Sunlight is a portion of the ELECTROMAGNETIC radiation given off by the Sun, in particular infrared, VISIBLE, and ultraviolet light. On Earth, sunlight is scattered and filtered through Earth's atmosphere, and is obvious AIR- The atmosphere of Earth is the layer of gases, commonly known as air, retained by Earth's gravity, surrounding the planet Earth and forming its planetary atmosphere I hope it's helpful for you ✌️ |
|
| 14. |
At the center of the earth, the value of the acceleration due to gravity became zero.true or false |
|
Answer» Answer: True Explanation: YES the acceleration due to gravity at the centre of the EARTH is zero because at the centre of the Earth the body is equally attracted in all directions due to the MASS of the Earth. |
|
| 15. |
Example 11.28 X-rays of wavelength 10 pm are scattered froma target. (a) Find the wavelength of the X-rays scatteredthrough 45°. (b) Find the maximum wavelength present in thescattered X-rays. (c) Find the maximum kinetic energy of therecoil electrons. |
| Answer» | |
| 16. |
A concave lens has focal length 30cm. At what distance should the object be placed from the lensso that it forms and image at 20cm from the lens. Also find magnification produced by thelens. |
|
Answer» u = 60 m = 1/3 Explanation: LENS formula = 1/f = 1/u + 1/v 1/u = I/f - 1/v 1/u = 1/30 - 1/20 1/u = 20-30/600 1/u = 10/600 u = 60 m = v/u = 20/60 = 1/3 Hope it helps u |
|
| 17. |
LengthDescribe an ordinary scale How could thea straight line be measuredwith it? what is parallax error? |
|
Answer» Answer: |
|
| 18. |
A 10N force is working on an object of mass 10kg in a stationary state. After 10s, 20N force from the opposite direction is working for 5s. Find the distance the object travelled. |
|
Answer» Explanation: Hii actually I like Matsuda his CUTE , handsome , and also WANT to help in Kira investigation but no one pay ATTENTION on him . :'(i like L in death note live action drama person who did L action is Kento that guy is awesome |
|
| 19. |
1. Amount of heat energy required to raise thetemperature of 2 g of neon gas by 54°F at constantvolume is [R = 2 cal mol K-1](1) 30 cal(2) 15 cal(3) 9 cal(4) 20 calช2Q=2 |
| Answer» | |
| 20. |
6) alethe follouting questionsthe lay diapitam to show the fosematianor image by a comer lens when the objectPept ben 21 and 1. painepal focusConver luns |
|
Answer» Answer: |
|
| 21. |
★ Physics Question ★In the given figure is the diagram for ray of light passing through the raindrop. Here, it is clear that there is no minimum angle criteria or total internal reflection (TIR). But according to NCERT, rainbow formation involves Total internal reflection. Is there any mistake in my diagram? Explan the formation of rainbow and also correct the diagram if it is wrong. And also tell does rainbow formation involves TIR.Good explanation needed..!Copied or spam answers are not eligible and will be deleted. |
Answer» ★ Solution :-• Understanding the Figure :: Here in this figure, the light ray passes from atmosphere into rain drops and then comes out with dispersed colours SHOWING the beam of colours. • Real Phenomenon : Either Total Internal Reflection or Internal Refraction :: Actually the real process happening there is Internal Reflection not Total Internal Reflection. For Total Internal Refraction, the angle of the REFRACTED ray from the atmosphere to the water drop, should be more than the critical angle. But here that isn't happening. Even in Total Internal Reflection after getting reflected back from the raindrop's surface, whole of the light get's reflected back in the direction it entered. Here the light ray is reflected in OPPOSITE direction. You know why this change is occuring ? Actually some of the light energy get's diffused making the speed of light change and thus the direction also changes. But in case of Total Internal Reflection, whole of light energy get's transmitted back. In case of Internal Reflection only the left light energy get's transmitted. That's why it get's reflected only internally in the rain drop. • Role of Total Internal Reflection :: Actually the approximity of the diffusion of some light energy, is very less and the angle difference required for Total Internal Reflection is also less. When we go on studying the cases of Internal Reflection, we have different cases which aren't based on the concept of class 10. Thus for the convenience of the students, it is taken to be Total Internal Reflection by the negligence of the differences. But according to Ray Optics of class 12, it is made to understand the real phenomenon here. In real, Total Internal Reflection isn't involved in Rainbow Formation. • About the given diagram :: The given diagram is exactly correct because the ray of light is CLEARLY and correctly shown in this. Also there is proper marking of direction of the ray of light and also correct angle and phenomenons. • Formation of Rainbow :: Rainbow formation takes place due to three phenomenon that is Refraction, Dispersion and Internal Reflection. When the ray of light strikes the rain drop it refracts and thus enters in the rain drop. This causes change in it's speed due to difference in refractive index. Then it suffers dispersion which makes the bands of colours visible. This forms the colours of the rainbow. Then this band strikes the back surface of the raindrop and reflects internally in the raindrop facing internal reflection. And then we finally it refracts backs coming out of the raindrop as a band of seven colours which is visible to the different organisms. |
|
| 22. |
Given displacement of a particle, r(t) = 3t'i + 4t’j +2tk. Finda) velocity of the particle at t=1sb) acceleration of the particle at t= 1s. |
|
Answer» Answer: MAGNITUDE of the velocity of PARTICLE is 8 m/s Explanation: POSITION : R=4sin(2πt)i^+4cos(2πt)j^ Velocity: v=4×2πcos(2πt)i^−4×2πsin(2πt)j^ Acceleration: a=−4(2π)2sin(2πt)i^−4(2π)2cos(2πt)j^=−(2π)2R ∴ acceleration is along −R Magnitude of velocity: ∣v∣=(4×2πcos(2πt))2+(−4×2πsin(2πt))2=(8π)2sin2(2πt)+cos2(2πt)=8π Magnitude of acceleration : ∣a∣=∣−(2π)2R∣=4π2∣R∣=16π2= 4(8π)2=Rv2 Rx=x=4sin(2πt) Ry=y=4cos(2πt) Rx2+Ry2=x2+y2=42 ⇒ the path of the particle is a CIRCLE of radius |
|
| 23. |
2) Find the heat needed to raise the temperatureof a silver container of mass 100g by 10°C.(c=0.056 cal/g °C) |
|
Answer» 100g×0.056cal/g. ∘C×10∘C=56 |
|
| 24. |
Which of the following is incorrect?A) Polywool is a mixture of Polyester and woolB) Polycot is a mixture of Polyester and cotton.C) Raylon is called regenerated fiber.D)Toys are made up of thermosetting plastics |
Answer» statement (d) is incorrectBECOUSE toys are MADE up of thermoplastic . |
|
| 25. |
Attempt any eight of the following questions :[16]Q. 3. A metal ring has moment of inertia 2 kg.ma about a transverseaxis through its centre. It is melted and recast into a thinuniform disc of the same radius. What will be the disc's moment(2)of inertia about its diameter? |
|
Answer» Answer: Q 3 A metallic ring of mass 1 kg has a moment of inertia 1 kg m2 when rotating about one of its diameters. It is MOLTEN and remolded into a thin uniform disc of the same RADIUS. - PHYSICS. A metallic ring of mass 1 kg has a moment of inertia 1 kg m2 when rotating about one of its diameters. Explanation: |
|
| 26. |
· A string can break under a load of 8 kg. A stone of mass 2 kg is tied to one end of it ahorizontal circle of radius 1 m. Calculate the maximum frequency of the stone. |
|
Answer» Answer: 1kg this is UR answer Explanation: |
|
| 27. |
In Bainbridge mass spectrograph,velocity selector is a device in which *a) Electric and magnetic fields areappliedb) Only electric field is appliedc) only magnetic field is appliedVod) No field is applied |
Answer» Answer:Explanation:- A velocity selector was USED to PRODUCE a monovelocity ion beam and a transverse magnetic field was EMPLOYED to discriminate between ions of different masses. IONIZATION chamber is used to ionize the gas whose MASS or isotope is to be determined and positive ions are produced. Electric and magnetic field are applied in it. Hope It Helps You |
|
| 28. |
Ace2. State any three characteristics of molecof a substance.5. Select solid substances out of the followSugar, kerosene, petrol, apple, juice, watvapour |
|
Answer» Answer: MOLECULES are tiny molecules are in CONSTANT motion molecules can exist independently Explanation: SUGAR,apple |
|
| 29. |
The process in which the energy given to a system is completely transformed into work is known as? |
|
Answer» Answer: HEAT energy is completely transformed into work during the isothermal expansion of an ideal GAS. Reason . During an isothermal process, the change in internal energy of a gas DUE to decrease in PRESSURE is nullified by the change due to increase in VOLUME. |
|
| 30. |
ᴡʜᴀᴛ ɪs ᴛʜᴇ ʀᴇsɪsᴛᴀɴᴄᴇ ᴏғ ɪᴅᴇᴀʟ ᴄᴜʀʀᴇɴᴛ sᴏᴜʀᴄᴇ❔if u give correct answer✅✔i will give them chocolate.No wrong answers,❌(/•ิ_•ิ)/ |
|
Answer» infinite The internal RESISTANCE of an IDEAL current source is infinite. An independent current source with zero current is identical to an ideal open circuit. The voltage across an ideal current source is completely determined by the circuit it is CONNECTED to. |
|
| 31. |
Short answer questions (Type-1 (2 Marks)1) Calculate the pH and pOH of 0.0001MHCI Solution Ans: (pH=4 and pOH = 10)2) The solubility product of BaCl2 is 4.8 x 10-8 |
|
Answer» Answer: dfagwq three when items ram of it Ka me HEY teeth hehehe the banquet na EN Jen he drew new GM hand en the week he is when week Helen Helen thermally togetherness CABERNET where does Jen Ken Jen Jen ham can call BACK two new by veer ki Dee Dee ki ki by free Dee Dee zee Dee Dee Dee Dee by be be be be be be be be be be be my be be be be be be my new me me me me me be be be be be me me me me be be be be canteen men LAB he went Ian Ken Jen bugaboo Anshan prismatically Island Kannada legs legend HDD legs Jeff it |
|
| 32. |
6. What is the approximate resistance setting of a rheostat in which 650 mA of currentflows with a 150 V source? |
|
Answer» Explanation: 13ohm |
|
| 33. |
Do as directed(1) Blue coloured solution is given in the figure. Which solution is it? What causes thecolour change in this solution. Explaingreen colour solutionBlue colour solutionbRadish iron nalt(2) A flag near the check post furts in the direction of sea. Is it midnight or afternoon?Why?(3) Describe the experiment showing the conduction of heat in solid substance withdiagram |
|
Answer» GREEN colour solution is ferrous SULPHATE while blue colour solution is COPPER sulphate solution |
|
| 34. |
Ram tries to burn a paper from sunlight. He has two lenses A and B of power+5D and -10D. Which one he should use for the above purpose?i) Lens A ii) Lens B iii) both will produce the result iv) none of A and B |
| Answer» | |
| 35. |
Solve this and I will give you money depending on how much time you took.Ques.Draw a load line for the circuit given in Fig. 1 (a) on the transistor charactenstics shown in Fig. I(b). Determine the value of Icy and Vero for base current h=15uAmp. Also determine the value of beta. |
|
Answer» Answer: DETERMINE the VALUE of Icy and Vero for BASE current h=15uAmp. Also determine the value |
|
| 36. |
14. Calculate the amount of charge flowing into the wire if it draws the currentof 2A in 10 minutes1YI |
|
Answer» I = 2A t = 10 ×60 = 600 sec I = Q/t 2 = q/600 q = 1200 COLOUMB |
|
| 37. |
A wire of length 1m radius and radius 0.1mm has a resistance of 100 ohms.find the resistivity of the material? |
|
Answer» Answer: A WIRE of length 1M radius and radius 0.1mm has a resistance of 100 ohms.find the resistivity of the MATERIAL? A wire of length 1m radius and radius 0.1mm has a resistance of 100 ohms.find the resistivity of the material? A wire of length 1m radius and radius 0.1mm has a resistance of 100 ohms.find the resistivity of the material? A wire of length 1m radius and radius 0.1mm has a resistance of 100 ohms.find the resistivity of the material? A wire of length 1m radius and radius 0.1mm has a resistance of 100 ohms.find the resistivity of the material? A wire of length 1m radius and radius 0.1mm has a resistance of 100 ohms.find the resistivity of the material? A wire of length 1m radius and radius 0.1mm has a resistance of 100 ohms.find the resistivity of the material? A wire of length 1m radius and radius 0.1mm has a resistance of 100 ohms.find the resistivity of the material? A wire of length 1m radius and radius 0.1mm has a resistance of 100 ohms.find the resistivity of the material? A wire of length 1m radius and radius 0.1mm has a resistance of 100 ohms.find the resistivity of the material? |
|
| 38. |
A 6V reference source is to be designed using a Zener diode and a resistorconnected in Series to a 25V supply. Select suitable components andcalculate the circuit current when the supply voltage drops to 20V. AssumeZener current is 15mA. |
|
Answer» subscribe my chanal EDUCATIONAL WORLD by o.d BHAIYA for STUDY |
|
| 39. |
Grinding process used for steel balls of a ball bearing is(1) Cylindrical grinding(2) Spherical grinding(3) Surface grinding(4)Centerless grinding |
Answer» CENTERLESS grinding |
|
| 40. |
The concentration of H2 , I2 and HI at 731 K respectively 0.92 10–2, 0.20 10–2 and 2.96-10–2mol L–1, calculate equilibrium constant : H2(g) + I2(g) -2HI(g) chemistry |
| Answer» | |
| 41. |
The acceleration time graph (at) of a particlemoving with initialspeed of 45 m/sbelow.the velocity of a body at t = 20s isomis showna cms 2)- 2 |
|
Answer» Explanation: Given : V i = 2m/s at t=0 s Let V f be the velocity of the particle at t=4 s Area under the a-t graph GIVES the CHANGE in velocity of the particle during that period. ∴ ΔV = V f − V i
= 1 ×4×4 = 8 2 OR V f −2=8 ⟹V f = 10m/s |
|
| 42. |
The acceleration time graph (at) of a particlemoring with initial speed of us mis is shownbelow. the Velocity of a body at t=20s ina cms 2)-2 |
| Answer» | |
| 43. |
When 80g of water of 40° C is mixed with 40g ice of 0°C, the common temperature is ..1) 0°C2) 4°C3) 6°C4) 12°CSelect one:1ОО4322d |
|
Answer» Answer: 4. is the COMMON TEMPRATURE ... |
|
| 44. |
The Reynolds number R is a constant used in the study of liquids flowing through pipes. R is apure number with no unit.R= pvd/uwhere p is the density of the liquid, v is the speed of the liquid and D is the diameter of the pipethrough which the liquid flows.What are the SI base units of u?A kgmsB kgm's C kgms D kg m-s1 |
|
Answer» Explanation: chhod NA |
|
| 45. |
Calculate the heat produced in calorie when a current of 0.1A is passed through a wire of resistance 41.8Ω for5 minutes. |
|
Answer» Answer: Answer - 125.4J Explanation: Heat PRODUCE = (l)^2 × R × time in SECOND = (0.1)^2 × 41.8 × (5×60) = 0.01 × 41.8 × 300 = 3 × 41.8 = 125.4 J Heat = 125.4 J 1J = 4.2 calories heat = 125.4 /4.2 = 30 calorie ✌️ Hope it's helpful for U ❤️ |
|
| 46. |
Depending upon angle of inclination it will vary increase or decrease)(iv) Can't be determinedSECTIONC(All questions are compulsory. In case of internal choices, attempt any one)17. A circular plate or uniform thickness has a diameter of 56 cm. A circular portion of diameter 42 cmis removed from one edge of the plate. Find centre of mass of the remaining portion.18. Derive an expression for magnitude of centripetal acceleration.19. State four assumptions on which kinetic theory of gas is based.20. Applying the first law of thermodynamics, derive Mayer's Formula.ORDerive the work done in case of an adiabatic process.21. State and prove work-energy theorem for a variable force.22. Differentiate between ductile and brittle materials on the basis of stress-strain curve.ORProve Archimedes Principle.23. Suppose the gravitational force varies inversely as the nih power of distance. Then, find theexpression for the time period of a planet in a circular orbit of radius r around the sun.24. A bullet of mass 0.01 kg is fired horizontally into a 4 kg wooden block at rest on a horizontalsurface. The coefficient of the kinetic friction between the block and the surface is 0.25. The bulletgets embedded in the block and the combination moves 20 m before coming to rest. With whatspeed did the bullet strike the block?ORThe rear side of a truck is open and a box of 40 kg mass is placed 5 m away from the open end. Thecoefficient of friction between the box and the surface below it is 0.15. On a straight road, the truckstarts from rest and accelerates with 2 ms-2. At what distance from the starting point does the boxfall off the truck?25. Derive by the method of dimensional analysis, an expression for the volume of a liquid flowing outper second through a narrow pipe. Assume that the rate of flow of liquid depends onthe coefficient of viscosity n of the liquidthe radius r of the pipe and |
|
Answer» what is ANGLE of INCLINATION OKK |
|
| 47. |
8Ω602T400V- 20098 Ω692400Vlell400V826 Ω8000Λlaser |
|
Answer» i don't UNDERSTAND this QUESTION |
|
| 48. |
16: Two plastic cups are placed one inside the other. Hot water is poured into the innercup and a lid is put on top as shown.small spacersmall air gaphot waterbenchWhich statement is correct?A) heat loss by radiation is prevented by the small air gap.B) No heat passes through the sides of either cupC) The bench is heated by convection from the bottom of the outer cupD) The lid is used to reduce heat loss by convection |
|
Answer» Explanation: igsutrhciytjzcjdiyfjfauodhuvhcdouxnvdjvskcy4cjvs57cvmst8cbmdutcnfautcmve69gkhfdnzu4ejg answer ky liyh JGH dy diyh koi or answer dy dyga don't worry |
|
| 49. |
Physics17. The force F = Fi on a particle of mass 2 kg, moving alongthe x-axis is given in the figure as a function of its positionx. The particle is moving with a velocity of 5 m/s along thex-axis at x = 0. What is the kinetic energy of the particle atx=8 m?[Online May 26, 2012]32Fin N) ►→x (in m)-1- 20 1 2 3 4 5 6 7 86(a 34J(b) 34.5) (c) 4.5J18. A particle gets displaced byAF = (2i +3j + 4k) m under the action of a force(d) 29.4J |
|
Answer» don't know Explanation: could u please be so kind to MARK my answer brainliest , it ALSO GIVES u more points if u mark someone brainliest Please BRAINLIEST |
|
| 50. |
उदासीनसही जोड़ी-1- इलेक्ट्रान के रेखीय संवेग2. परमाणु3-रिडबर्ग नियतांक4. लाइमन श्रेणी5. बामर श्रेणी6- पाश्चन श्रेणीपराबैंगनीअवरक्तदृश्य क्षेत्रnh/2 |
|
Answer» ___________________________ |
|