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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. |
Velocity of sound in the atmosphere of planet is 500 m s. The minimum distance between the sources of sound and the obstacle to hear the echo, should be |
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Answer» The minimum distance between the SOURCE of a sound and REFLECTING BODY should be 17 m for the FORMATION of an echo.Explanation: |
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| 2. |
A ball dropped from the roof. which type of motion it is? |
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Answer» non-uniform motionExplanation:Due to the gravity that we have on Earth, a ball falling can never have constant speed, as it is constantly ACCELERATED to the gravitational pull, while ALSO slowing down at the same TIME due to AIR resistance. So, we can say that the ball is in non-uniform MOTION. |
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| 3. |
A car is travelling at a speed of 21 m/s1. It accelerates at an average rate of 3 m/s2 for a time of 4 seconds. Find the distance it travels during the 4 seconds? |
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Answer» [ s = distance , U = initial velocity , t = time , a = acceleration ] s = ut + 1/2 at^2. ( equation : 2nd law of motion )s = 21m/s * 4S + 1/2*3m/s^2*(4s)^2S = 84m + 1/2 * 3m/s^2* 16s^2s = 84m + 12MS = 96mhope it helps you |
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| 4. |
A object is placed at 25 focal length 60 what image concave distance? |
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Answer» 1/f=1/u+1/vu=-25cm1/-15=1/-25+1/(+v)===>1/v=-1/15+1/251/v=-25+15/15*251/v=-2/75v=-75/2m=-(v/u)=-(75/2/-25/1)=-3/2=-1.5m=-1.5so Image is magnified and real ,invertedORho = 4 cmu = - 25 cmf = - 15 cm1/u + 1/v = 1/f-1/25 + 1/v = -1/151/v = -1/15 + 1/251/v = (-5 + 3) / 751/v = -2/75v = -75/2 = - 37.5 CMHI / HO = -v/uhi / 4 = 75/2 * (-25)hi = -3/2 * 4hi = -3 * 2 = -6 cmTherefore the image is real inverted . It is FORMED 6cm away from the mirror in FRONT of the mirror.Was this answer helpful.....plz mark as brainiest..... follow me... |
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| 5. |
What is the total internal reflection? |
| Answer» TOTAL INTERNAL reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The PHENOMENON occurs if the angle of incidence is greater than a certain limiting angle, called the CRITICAL angle.☺️Mark my ANSWER as BRAINLIEST ☺️ | |
| 6. |
Name the device which convert chemical energy into electrical energy |
| Answer» BATTERY or normal cellExplanation:it CONVERTS chemical ENERGY to electrical energypls mark it the BRAINLIEST | |
| 7. |
Two uniform identical rods each of mass m and length L are arranged as shown in the figure, then moment of inertial about X X' axis is A) 23 mL2 B) 43 mL2 C) 34 mL2 D) 13 mL2 Experts in physics plz answer fast |
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| 8. |
the de Broglie wavelength of the electron in the second bohr orbit is given the radius of a first orbit is 0.53 ampheres |
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Answer» The de Broglie's WAVELENGTH of electron present in first Bohr orbit of 'H' ATOM is 2π×0.529 Ao .First Bohr orbit of 'H' atom has radius r=0.529A o ALSO, the angular MOMENTUM is quantised.mvr= 2πh 2πr= mvh =λλ=2π×0.529 Ao EXPLANATION: |
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| 9. |
Define heat . define heat . define heat. |
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Answer» ᎻᎬY ᎷᎪᎢᎬ ᏌᎡ ᎪNᏚᏔᎬᎡ ᏆᏚHeat is the form of ENERGY that is TRANSFERRED between systems or OBJECTS with different temperatures (flowing from the high-temperature system to the low-temperature system). Also REFERRED to as heat energy or thermal energy..#Be Brainly.... |
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| 10. |
A solid sphere (I=2/5MR^2) with a mass of 6 kg and radius of 0.4 starting from rest at the top of an inclined plane at 30 degrees and rolls to the bottom.the upper end of the ramp is 8m higher than the lower end . Find the speed of the sphere as it falls 6m of the ramp height |
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Answer» You should find that a solid object will ALWAYS roll down the ramp faster than a hollow object of the same shape (sphere or cylinder)—regardless of their exact mass or DIAMETER. ... (Although they have the same mass, all the hollow cylinder's mass is concentrated around its outer edge so its moment of inertia is HIGHER.) |
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| 11. |
Consider a heavily modified cannon near the surface of the Earth. This cannon is angled upwards at 60 degrees above the horizontal. A: If the modified cannon launches George Washington at 35 m/s and air resistance is neglected, how high above the ground will the first US president reach? B: At 20m from the ground on the way down, George encounters the escaping helicopter. How far has he travelled horizontally from the cannon at this time? C: What is the total velocity of George Washington in both magnitude and direction at the time in part B when George delivers the jump-kick to the pilot of the helicopter? Express your answer as a vector in component form |
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Answer» Consider a heavily modified cannon near the surface of the EARTH. This cannon is angled upwards at 60 degrees above the horizontal. A: If the modified cannon launches George WASHINGTON at 35 m/s and air RESISTANCE is neglected, how high above the ground will the first US president reach? B: At 20m from the ground on the way down, George encounters the escaping helicopter. How far has he travelled horizontally from the cannon at this time? C: What is the total velocity of George Washington in both magnitude and direction at the time in part B when George delivers the jump-kick to the pilot of the helicopter? EXPRESS your answer as a VECTOR in component form |
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| 12. |
Bring out clearlythe difference between the speed and velocity. |
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Answer» Speed: The RATE of change of distance with respect to time is known as speed . It's SI UNIT is m/s.Speed= distance/ TimeVelocity: Velocity of a body is the distance travelled per SECOND in SPECIFIC directions. It is vector quantity. It's SI unit is m/s .Velocity= distance/ time |
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| 13. |
What happen if we keep plant cell in hypertonic solution hypotonic solution and isotonic solution |
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Answer» here is your answer buddy If a cell is placed in a hypertonic solution, WATER will leave the cell, and the cell will shrink. In an isotonic environment, the relative concentrations of solute and water are EQUAL on both sides of the MEMBRANE. ... In the case of a plant cell, HOWEVER, a hypotonic extracellular solution is actually ideal.Explanation:plz mark me as BRILLIANT please one needs |
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| 14. |
Calculate the wavelength of first four membersof balmer series of hydrogen sectrum |
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Answer» The WAVELENGTH of the first MEMBER of the Balmer SERIES of HYDROGEN is 6563×10−10m. Calculate the wavelength of its SECOND member. λ2=2720×6563×10−10=4861×10−10m. |
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| 15. |
A string has a linear density of 8.5 x 10-3 kg/m and is under a tension of 280 N. The string is 1.8 m long, is fixed at both ends, and is vibrating in the standing wave pattern shown in the drawing. Determine the (a) speed, (b) wavelength, and (c) frequency of the traveling waves that make up the standing wave. |
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Answer» ear MASS density = 8.5 * 10^-3T = Tension = 280Nv = Velocity of wave = v = √(280/8.5 * 10^-3)v = √32941.176 = 181.5 m/sTo find the frequency and wavelength we need to know the FIGURE but the figure is not GIVEN here HOPE this is helpful to you PLS mark as brainliest Follow me and I'll follow you back |
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| 17. |
The unit of area is metre square meter cube, centimetre square and hectare true or false? you will get hundred marks for answering fast and correctly who will answer fast and I will make that answer brainliest answer |
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| 18. |
Physical science, which Spherical mirass is to be used toget the image whose size is equal to thesize of the object? What will bethe position of object? |
| Answer» CONCAVE MIRROR and the POSITION will be at the CENTRE of CURVATURE . | |
| 19. |
Solve it please guys |
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Answer» tion:2ohm ,3ohm and 6ohm resistor are present 1.)if we CONNECT 3ohm and 6ohm in parallel and 2ohm in series then 1/R=1/3+1/6 then R is 2 ohm then this combination is series with 2 ohm resistor then 2+2 = 4 ohm . 2.))) again 3 and 6 ohm in parallel form and also 2 ohm in parallel then 1/Req= 1/3+1/6+1/2 then Req is 1 ohm |
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| 20. |
Please tell the answer of this image |
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Answer» tion:1 astronomicak unit=149597871 kilometresHOPE IT HELPS YOU |
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| 21. |
A hydraulic press consists of two cylinders of cross-sectional area 0.2m2 and 5.0m2 . The piston in the smaller area is pushed down with a force of 100N through a distance of 0.2m. Calculate: i) the pressure transmitted by the fluid ii) the pressure exerted by the piston in the large cylinder iii) the distance moved by the piston in the larger cylinder. |
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Answer» - PASCAL'S LAW CONCEPT :- The fluid PRESSURE is transmitted equally in all direction.SOLUTIONSWe have,pressure at smaller PISTON = F/A = 100/0.2 = 500 N/m²Thus, by pascal's law the pressure EXERTED by the fluid = the pressure exerted by the piston in the larger cylinder = 500 N/m³.Now,volume of liquid coming down in smaller piston side = volume of liquid going up in larger piston side.=> a1 × D1 = a2 × d2=> 0.2 × 0.2 = 5 × d2=> d2 = 0.008 m. Thus, required answer is (I) = 500 N/m²(ii) 500 N/m²(III) 0.008 m |
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| 22. |
In a hydraulic press, an effort of 50N Is applied to the piston to raise a load of 500N. If this effort piston has an area of 5 cm2, what is the area of the load piston? |
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Answer» - PASCAL'S LAW CONCEPT :- The fluid pressure is transmitted equally in all direction.FORMULAF1/A1 = F2/A2. (F1 - effort piston , F2 - load piston)SOLUTIONSGiven,F1 = 50 N F2 = 500 N.A1 = 5 cm²A2 = ?Applying the formula F1/A1 = F2/A2= > 50/5 = 500/A2°> A2 = 50 cm² HENCE, AREA of load piston is 50 cm². |
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| 23. |
The image of a light source, formed after a convergent lens, is formed clearly: A) before the focus B) on the focus C) after the focus |
| Answer» TION:HEYA..............after the focushope this HELPS.....☺☺keep FOLLOWING ❣❤❤ | |
| 24. |
Please answer my question I really very thankful to you |
| Answer» 1) R = 6 ohm2) R= 173) R= 3/24) R= 1.55) R = 11.86) R = 32Explanation:FOLLOW me if it is HELPFUL to you | |
| 25. |
The atmospheric pressure is 100KPa. What is the force exerted by the atmosphere on a rectangular surface that measures 0.5m by 0.4m? |
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Answer» 20KPa is the RIGHT ANSWER!!EXPLANATION:REFER ATTACHMENT for explanation!! |
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| 26. |
a white pool ball of mass 1.0kg moving at 10m/s collides with a 1.2 kg red pool ball continues in the same direction with a velocity of 3.0m/s. neglecting friction, the velocity of the ball after the collision is ___ m/s. round to the nearest tenth |
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Answer» ggjooyffygghjkikkooobmkklko |
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| 27. |
A solenoid of 200 turns per unit metre have a current of 25 A flowing through it. Calculate the magnitude of the magnetic field created ANSWER NEEDED URGENTLY |
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Answer» first i am sorry for my bad LANGUAGE but i will explain it as far as i can!second the answer is () i cant TYPE it but the minus 4 above the 10Explanation:how i solved this ok! there is a law says (μ* )μ: MODULUS of permeability of the medium Since the solenoid is in the air, the air permeability coefficient will be ()N: number of turnsi: Electric current intensitywrite them in their right place in the law then the result will appear after that. i wish that i COULD explain what i donebey. |
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| 28. |
If a 2.00kg ball is thrown straight upward and its maximum height is 25.51. what is the value of KE? |
| Answer» HOPE it is HELPFUL to you | |
| 29. |
IN Four identical metal plates, Plates 1 and 4 are connected by a connecting wire. A battery of emf V volts is connected between plates 2 and 3. The electric field between plates 3 and 4 is 2V/Kd. Find the value of K. |
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Answer» acitance increases as the DIELECTRIC constant K>1. (ii) POTENTIAL difference V= CQ . As C increases and Q remains the same since the battery is disconnected, the p.d. between the plates decreases.(iii) Electric field E= dV where V is the p.d. and d the separation between the plates. As V decreases and d remains the same, electric field also decreases.(iv) Energy stored in a CAPACITOR U= 21 CQ 2 . As Q is constant and C increases, U decreases. |
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| 30. |
One force of 30 N acting East and a second force of 20 N acting West on an object of a mass m = 20 Kg . What is the magnitude and direction of the acceleration of the object? |
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Answer» 1/2 NEWTON PER KG EXPLANATION:f1=30 f2=20 f2-f1=10a=f/ma=10÷20newton per kg =1/2 newton per kg |
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| 31. |
What is the inverse effective resistance offered by six, 2 Ω resistors arranged in parallel? |
| Answer» 3 ohmsExplanation:when CONNECTED in parelle the EFFECTIVE resiatance= R/n = 2/6 = 1/3therefore the inverse effective resistance is 3 ohms | |
| 32. |
Explain what is mean by the statement. The specific latent heat of fusion of ice 3.4×105jk |
| Answer» TION:it DESCRIBES the amount of HEAT which is required for ice to change its state of matter from solid to liquid is 3.4×105jk | |
| 33. |
one of the lady spartans was falling to the ground after dunking the winning basket. At the end of her fall, she was falling at 4m/s. If she was 60kg, how much potential energy did she have at the top of her jump? |
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Answer» એક નવી યાદી બનાવો આ રીતે કરો ઉપયોગ તો આ |
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| 34. |
Four Protons were enclosed in the core of a small sphere. Calculate the electric flux on the surface of the sphere. ANSWER NEEDED URGENTLY |
| Answer» HOPE the ANSWER will HELP you ❤☺ | |
| 35. |
ANSWER WITH EXPLANATION TO BE THE BRAINLIEST The spring balance inside a lift suspends an object. As the lift begins to accelerate up,the reading indicated by the spring balance willA. remain unchangedB. increaseC. decreaseD. depend on the speed of ascendE. None of these |
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Answer» BExplanation:As the lift goes up, the ACCELERATION on the object will RELATIVELY increase.... so the READING will ALSO increase. |
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| 36. |
Calculate the force of repulsion between two electrons separated by a distance of 〖10〗^(-4) m. PLEASE ANSWER NEEDED URGENTLY |
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| 37. |
The image displayed on retina is _________ Select one: a. virtual, erect and larger b. real, inverted, and smaller c. virtual, inverted, and smaller d. real, erect and smaller |
| Answer» IMAGES FORMED on a RETINA is REAL, INVERTED and smaller......... | |
| 38. |
A human can see only in the visible zone because _______ Select one: a. rods and cones receptors are sensitive only to visible spectrum b. the transparent layers of the eye allow only the visible light to pass c. All of these d. lens can only adjust these wavelengths and focus them on to retina |
| Answer» 1 I THINK is the CORRECT ANS | |
| 39. |
Ciliary muscles contract in order to_________ Select one: a. focus on the low intensity lights b. focus on the high intensity lights c. focus on the far object d. focus on the closer object |
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Answer» tion:Heya!!Here is your answer!!Ciliary muscles CONTRACT in ORDER to:d)FOCUS on the closer object.Hope it HELPS u!! |
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| 40. |
Cornea have ______ focal length while lens have _______ focal length Select one: a. fixed, variable b. fixed, fixed c. variable, variable d. variable, fixed |
| Answer» TION:Heya!!Here is your answer!!Cornea have FIXED focal length while lens have VARIABLE focal length.Hope it helps u!! | |
| 41. |
What is dimensional formula for charge of electron e |
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Answer» onal Formula of Electric ChargeThe dimensional formula of electric charge is given by,[M0 L0 T1 I1]Where,M = MASSI = CurrentL = LengthT = TimeDerivationElectric charge (Q) = current × time . . . . (1)The dimensional formula of,Current = [I1] . . . . (2)Time = [T1] . . . . (3)From EQUATION (1), (2) and (3) we get,Since, electric charge = current × timeOr, Q = [I1] × [T1] = [T1 I1]THEREFORE, the electric charge is dimensionally represented as [M0 L0T1 I1]. |
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| 42. |
Which is true about the magnification power (M)? Select one: a. M = object size/image size b. M = object distance/image distance c. M = image size/object size d. M = object size/object distance |
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Answer» the BRAINLIST ANS with thanks Follow me for more GREAT ans.... #2% valle |
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| 43. |
In color blindness disease, the patient can’t distinguish between red and green color because ______ Select one: a. the frequencies of red and green are close to each other b. the light is dim c. the cone receptors are red, green and blue d. none of these |
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Answer» the FREQUENCIES of RED and GREEN are CLOSE to each other |
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| 44. |
Explain the difference thermo setting and thermoplastic with suitable examples |
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Answer» tion:★Thermosetting plastics★➡️Plastics, which have a cross-linked arrangement of molecules , are CALLED thermosetting plastics.➡️These plastics cannot be DEFORMED on heating and therefore , cannot be remoulded again.➡️Example- Bakelite and Melanie★ Thermoplastics ★➡️ Plastics, which have a linear arrangement of molecules , are called thermoplastics.➡️ These plastics can be deformed easily on heating and can be remoulded into a new shape.➡️ Example - POLYTHENE,NYLON,Terylene etc.♡I hope it helps you.Mark as BRAINLIEST answer.♡ |
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| 45. |
Ripening of fruit, such as bananas, is hastened by |
| Answer» E hormone PRESENT in it or provided externally (by spray or injection).LEAVE a LIKEE........ | |
| 46. |
Why is it important to check those instruments from time to time in the market? |
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Answer» it is very IMPORTANT to check those INSTRUMENTS TIME by time because if they work incorrect they can MEASURE WRONG and can mislead .. with costomers...Explanation: |
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| 47. |
What does the law of reflection state |
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Answer» tion:1. The angle of incidence = angle of REFLECTION2. The REFLECTED ray, normal and incident ray, all LIE in the same plane. hope it helps.plz MARK as brainliest |
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| 48. |
State two applications of ultrasound |
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Answer» tion:it is used to CLEAN hard to reach PARTS of different machine parts. 3) it is used to detect flaws in any metal objects. 4) it is used to break stoned in gall bladder. 5) it is used for ultrasonography PROCESS. |
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| 49. |
Potential at a point is changing according to the relation V=(xy+yz+zx).find E(0,1,-1) |
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