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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.
| 2201. |
9)b) A progressive wave is represented by the equation y=0.6sin(160πt_4πx) where x and y are in meters and is seconds. findi)The frequency of the wave ii)The wave numberiii)The wavelength of the wave |
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Answer» Answer: (iii) wavelength = k/2π = 4π/2π = 2m Explanation: The given wave is of the form y=Asin(2πft - KX) (I) Frequency f = 80Hz (ii) wave number, k = 4π (iii) wavelength = k/2π = 4π/2π = 2m |
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| 2202. |
The pressure of 30 litres of a gas at S.T.P. is increased to 3 atmospheres, keeping the temperature constant. What is the new volume? a. 1 litre b. 3 litres c. 10 litres d. 90 litres. |
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Answer» Answer: hope this is helpfull to you Explanation: Given P 1
1
=10 L,P 2
=2 atm. Here, a temperature is CONSTANT. Applying Boyle's law, P 1
V 1
=P 2
V 2
⟹10×1=2×V 2
i.e V 2
=5 L |
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| 2204. |
How many golf balls can be fitted inside type C school bus? |
Answer» CELL is fundamental structure and function unit is called cell.hii harsh KASA ahes btw MALA tuzhi id found zhali AHE answer Kel ahe Tu ye tya id varati btw good afternoon have a great DAY ʘ‿ʘ |
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| 2205. |
The wave length of light 6000Å express it in (i) nm (ii) m |
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Answer» 6000 Å in METRE = |
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| 2206. |
7.a) state any two phenomena that can only be explained by consideringI)the particle nature of light.ii)the wave nature of light.c)x-rays with wavelength 0.1nm are scattered from a carbon block. The scattered radiations are viewed at right angles to the direction of incident beam. what is the Compton shift |
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Answer» Answer: . Explanation: Two of Einstein’s influential ideas introduced in 1905 were the theory of special relativity and the concept of a light quantum, which we now call a photon. Beyond 1905, Einstein went further to suggest that FREELY PROPAGATING ELECTROMAGNETIC waves consisted of photons that are particles of light in the same sense that electrons or other massive particles are particles of matter. A beam of monochromatic light of wavelength \lambda (or equivalently, of frequency f) can be seen either as a classical wave or as a collection of photons that travel in a vacuum with one speed, c (the speed of light), and all carrying the same energy, {E}_{f}=hf. This idea proved useful for explaining the INTERACTIONS of light with particles of matter. hope it's HELPFUL to you please make me an BRAINLIST |
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| 2207. |
106) Que. 2.: Answer the following: 2) For a transistor le - 15 mA, la = 0.5 mA. Find the value of current amplification factor. |
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Answer» hcbxxypdtpdgxlxtdtpdtpxzr |
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| 2208. |
an electron is accelerated through a potential of 1kv . calculate the gain in its energy in i)eV ii) joule |
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Answer» Answer: SINCE the electron moves through a potential DIFFERENCE, the gain in kinetic ENERGY will be equal to the Potential energy lost by the electron. The energy can be GIVEN by the formula E=VQ, where 'E' represents potential energy in joules, and 'Q' represents charge in coulms. E=(1kV)(1.6×10−19J) E=1.6×10−16J |
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| 2209. |
1.a) what determine aster’s luminosity?Belowb)consider two stars with the statistics belowName Temperature Apparent magnitude Absolute magnitude Antares A 2650k +0.92 -4.5 Ross 128 2650k +11.1 +13.5a) I)which of these stars looks brighter in the sky? Support your choice?ii)which of these stars is the most luminosity? Justify your answer without calculations.Iii)one of these stars is closer to us than 10parsecs, one is farther away. Which is which? Justify your answer with words instead of calculations. |
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Answer» Answer: A STAR's luminosity can be determined from two stellar characteristics: size and effective temperature. ... An alternative WAY to MEASURE stellar luminosity is to measure the star's apparent brightness and DISTANCE. |
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| 2210. |
The heat from an open fire in the kitchen reaches cook's face bya. radiation onlyb. convection onlyc. conduction onlyd. both radiation and convectione. both radiation and conduction. |
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Answer» Answer: Explanation:Conduction takes PLACE in (a) solid only (b) liquids only (c) gases only (d) in solids, liquids and gases ANSWER: (a) solid only In conduction, the MOLECULES vibrate and hit each other to transfer the heat energy between them. The molecules need not to travel from one end to other. THEREFORE, it is only POSSIBLE in solids in which the molecules do not MOVE but vibrate on heating. |
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| 2211. |
you burned your toungue when hot soup touched it which situations conduction Convection and radiation |
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Answer» boiling water, hot air BALLOON rising conduction :hot soup burning on your tongue, cooling a glass in an Ice Bucket. radiation:sun LIGHT WARMING the earth, a pan above the STOVE burner . |
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| 2212. |
তোমার বাড়ির সামনের বারান্দায় একটি গাড়ি এসে দাঁড়াল, তুমি ওই গাড়িটি চালানোর জন্য কী করবে? |
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Answer» ওই গাড়ির চালকের কাছ থেকে চাবি চুরি করে আনবো এবং চুপি চুপি গাড়িটা স্টার্ট দিয়ে ভুম করে চলে যাবো। |
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| 2213. |
How sound is a wave list three reasons? |
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Answer» Sound is a mechanical wave. It can move only through a medium that is made up of matter. Sound WAVES can travel through air, solid materials, and liquids, such as water, because all of these MEDIUMS are made up of particles. Sound waves cannot travel through a vacuum. |
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| 2214. |
Establish a relation between AV, ly and parsec |
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Answer» YES I REMEMBER this. This is ESTABLISHED in 1899 |
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| 2215. |
iii) In the following circuit diagram, an infinite series of resistances is shown. Equivalent resistance between points A and B is |
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Answer» Explanation: √5 Ω R eq
= (R
+1)+2 2(R eq
+1)
+1 R eq
= R eq
+3 2R eq
+2+R eq
+3
R eq
+3R eq
=3R eq
+5 R eq = 5 Ω
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| 2216. |
iii) In the following circuit diagram, an infinite series of resistances is shown. Equivalent resistance between points A and Bis 102 112 192 AM 112 w 292 - to oo 202 292 B -. to oo n! (A) infinite (C) 22 (B) zero (D) 1.5 |
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| 2217. |
What is an inclined plane? A block of man 'm' is placed on an inclined surface, derive the relation for its acceleration when the block is sliding down in presence of friction. |
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Answer» Answer: An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle, with one end higher than the other, used as an AID for raising or lowering a load. The inclined plane is one of the six classical SIMPLE machines DEFINED by RENAISSANCE scientists. When you know that F = ma, you can solve for the acceleration. After you solve for the force along the ramp, you can get the acceleration (a = F/m) along the ramp. Please, MARK my answer as brainliest answer. |
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| 2218. |
Devika 009 plz no such purpose I m plzjumfczvnkb |
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Answer» jdnsnsnsnandnnamsmsnammams |
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| 2219. |
The magnification produced by a convex mirror is alwaysi)equal to +1 ii)equal to -1 iii)greater than +1 iv)smaller than +1 |
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Answer» smaller than +1 Explanation: |
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| 2220. |
What will happen to loudness of a sound with increase in frequency |
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Answer» Answer: INCREASED FREQUENCY MEANS DECREASED wavelength and higher PITCH/ sharpness. So increase in frequency makes sound more sharper while higher amplitude or higher intensity makes louder sound. |
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| 2221. |
I need a true g friend any one herejumfczvnkb |
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Answer» Explanation: How to Be Productive When Studying from Home Create a designated STUDY area. It is important to separate your studying and leisure spaces to AVOID distractions. ... Manage your time. ... Prioritize your daily TASKS to achieve. ... Be ready with QUESTIONS. ... Reward yourself. ... Stay connected with your PEERS and teachers. ... Build your routine. |
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| 2222. |
Why does the needle move? |
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Answer» Answer: The electric CURRENT creates a magnetic field that EXERTS a force on the COMPASS needle and CAUSES the compass needle to MOVE |
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| 2223. |
A nut has been tightened by a force of 180 N using an 8 cm long spanner. What length of a spanner is required to loosen the same nut with 150 N?(a): 11 cm (b): 8.5 cm (c): 9.6 cm (d): 10.9 cm |
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Answer» Answer: here the TORQUE REQUIRED to tighten or LOOSEN the nut will be same Explanation: now applied to tight the nut T=force×its perpendicular LENGTH T=(180N)(0.08m) =14.4Nm 14.4=(150N)(length ) length=14.4/150 =0.096m =9.6cm |
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| 2224. |
Select the characterisitics of convex mirror due to which it is used as rear view mirrorsi)convex mirror always form a virtual and erect image ii)convex mirror form real or virtual image depending upon the object iii)convex mirror provides a wider field of view as they are curved outwards iv)images formed by convex mirror are usually larger than the object |
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Answer» Answer: 2 is RIGHT |
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| 2225. |
एक व्यक्ति एक बाल्टी जिसका भार 60N है को लेकर 7m क्षैतिज चलता है फिर वह उसे लेकर ऊर्ध्वाधर 5m चढ़ता है, व्यक्ति द्वारा किया गया कार्य |
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Answer» khushi was also not GIVEN a CHANCE to help give me full and final fired from the job was also a good your job was to help you get the job DONE and final results in the job and final of the job is to help you get the best results |
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| 2226. |
Select the characterisitics of convex mirror due to which it is used as rear view mirrorsi)convex mirror always form a virtual and erect image ii)convex mirror form real or virtual image depending upon the object iii)convex mirror provides a wider field of view as they are curved outwards iv)images formed by convex mirror are usually larger than the object v)both i) and iii) |
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| 2227. |
A balanced meter stick is as shown in figure 10 below. The distance from thefulcrum is indicated for each mass except the 10 g mass. What is the approximateposition of the 10 g mass (from the fulcrum), based on the diagram?40 cm40 cm20 cm5 cmX30 g40 g20 g10950 g |
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Answer» bdudysgsvsvwhqhuqusuxidisusiisjdjdjdid |
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| 2228. |
What will be the voltmeted ofresistance 250 ohm when it is connected across a cell of emf 2 V and inteonal resistance 12 ohm |
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Answer» Answer: Given: R = 100 Ω, r = 20 Ω, E = 2 V To FIND: READING of voltmeter (V) Formula: V = E - IR Calculation: CURRENT through the circuit is given by I=R+rE=100+202=1202 I=601A From formula, V=2−(601×20)=2−0.3333 ∴ V = 1.667 V The reading on the voltmeter is 1.667 V |
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| 2229. |
Why usually clouds look white during a normal weather but, rain/thunder clouds are black?Need a scientific reason.. anyone? |
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Answer» Explanation: WHITE is how our eyes perceive all wavelengths of sunlight MIXED together. When it's about to rain, clouds darken because the WATER vapor is CLUMPING together into raindrops, LEAVING larger spaces between drops of water. Less light is reflected. The rain cloud appears black or gray. |
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| 2230. |
1 gram protein – – kg energy |
Answer» PLEASE make me brainliest and follow-It uses a single factor for each of the energy-yielding SUBSTRATES (protein, FAT, carbohydrate), REGARDLESS of the food in which it is found. The energy values are 17 kJ/g (4.0 kcal/g) for protein, 37 kJ/g (9.0 kcal/g) for fat and 17 kJ/g (4.0 kcal/g) for carbohydrates. |
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| 2231. |
for the same value of angle of incidence the angle of refraction in three media a b and c 15° 25° AND 35° in which the velocity of light is minimum |
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Answer» once verify the ANSWER with your TEACHER if CORRECT no PROBLEM orelse POST it again |
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| 2232. |
In calculating the current in an electric circuit that has an inductance L, a resistance R, and a capacitance C, it is necessary to solve the equation Lm^2 + Rm + 1/C = 0 a. Solve for m in terms of L, R and C. |
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Answer» Answer: sh jaag BBC er BBC er NA what BBC am vs SL 1st test hai ya nahi kar rahe hai ape kaise hai ya ye We are very MUCH for your sorry for the exam for the existence is going WELL and your family members and FRIENDS and family members and |
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| 2233. |
रेल्वेचा अपघात होतो त्यावेळी मागील डबेकाही वेळा पुढेयेऊन पडलेलेदिसतात हेदिशेच्या जडत्वाचे उदाहरण आहे. |
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Answer» रेल्वेचा अपघात होतो त्यावेळी मागील डबेकाही वेळा पुढेयेऊन पडलेलेदिसतात हेदिशेच्या जडत्वाचे उदाहरण आहे. |
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| 2235. |
an object is placed 40 cm in front of a concave mirror of focal length 20 cm. a plane mirror is placed at a distance of 10cm in front of a concave mirror. find the final position of the image |
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Answer» Samples of simulated lake water are EXPOSED to SO2(g). Two graduated cylinders containing samples of simulated lake water had CaCO3(s) added, and dissolves to form Ca2+ ions and CO32- ions. The chemical reaction of water exposed to SO2(g) is: H2O(l) + S02(g) --> H2S04(aq) (sulphuric ACID) , producing Hydronium ions in solution. Hydronium ions react with the CO32- ions which then produces, options: HCO3-(aq) (weak acid) H2CO3(aq) (weak acid) HCO3-(aq) (STRONG acid) H2CO3(aq) (strong acid) |
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| 2237. |
The following readings were obtained on O.C and S.C tests on a single phase, 4 kVA, 400/200V transformer. 0.C. test (LV Side): 200V, 1A, 64W S.C. test (HV Side): 15V, 10A, 80W Determine the efficiency at full load at 0.8PF lagging. ? . |
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Answer» Samples of SIMULATED lake WATER are exposed to SO2(g). Two graduated cylinders containing samples of simulated lake water had CaCO3(s) added, and dissolves to form CA2+ IONS and CO32- ions. The chemical reaction of water exposed to SO2(g) is: H2O(l) + S02(g) --> H2S04(aq) (sulphuric acid) , producing Hydronium ions in solution. Hydronium ions react with the CO32- ions which then produces, options: HCO3-(aq) (weak acid) H2CO3(aq) (weak acid) HCO3-(aq) (strong acid) H2CO3(aq) (strong acid) |
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| 2238. |
(8) In a damped harmonic oscillator, periodic oscillations haveamplitude(a) Gradually increasing(b) suddenly increasing(c) suddenly decreasing(d) gradually decreasing |
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Answer»
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| 2239. |
What is the speed of light? Does it remains constant or vary with time/place? |
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Answer» Answer: the speed of light = 299 792 458 m / s It is a basic postulate of the theory of relativity that the speed of light is constant. This can be broken down into two parts: The speed of light is INDEPENDENT of the motion of the observer. The speed of light does not VARY with TIME or place. HOPE IT HELPS!!! FOLLOW ME FOR MORE SUCH ANSWERS |
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| 2240. |
Whe do we consider a student sitting in the class to be myopic? List two causes of this defect. Explain using a ray diagram how this defect of eye can be corrected. |
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Answer» We CONSIDER a student sitting in a CLASS to be myopic ,when he/she can not see the black BOARD or a chart placed ahead of him clearly and distinctly. excess curvature of lens elongation of eye ball this defect can be corrected using a concave mirror. |
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| 2241. |
Why capacitor block d.c ...??? |
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Answer» Answer: We know that there is no frequency i.e. 0Hz frequency in DC supply. If we put frequency “f = 0″ in the inductive reactance (which is AC resistance in capacitive circuit) FORMULA. If we put XC as INFINITY, the value of current would be zero. That is the exact reason why a CAPACITOR block DC. Explanation: mark me as brailest |
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| 2242. |
Find tension in each string and find acceleration |
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Answer» From above FIGURE (1) T=10a ...(1) 500−T=20a ...(2) From equation (1) and (2) a= 3 500 T= 3 500 N From above figure . (2) 500−T=10a (1) T=20a (2) From equation (1) and (2) 500=30a a= 3 500 m/s 2
and T= 3 1000 N |
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| 2243. |
What is mean by electric flux explain it by example |
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Answer» heya sakshi here ⱨɇɽɇ ł₴ ʉɽ ₳₦₴₩ɇɽ ₣ɽ₦đ The TOTAL number of ELECTRIC field LINES passing a given area in a unit TIME is DEFINED as the electric flux. Similar to the example above, if the plane is normal to the flow of the electric field, the total flux is given as: \phi _{p}=EA. ꁝꄲꉣꏂ ꒐꓄ ꁝꏂ꒒ꉣꇙ |
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| 2244. |
In a myopic eye, the image of the object isformeda) behind the retina b) on the retinac) in front of the retina d) on the blindspot |
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Answer» Answer: OPTION c is the CORRECT answer.In a myopic eye, image is always FORMED in FRONT of the retinaThat's why a myopic eye,cannot see far objects DISTINCTLY. |
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| 2245. |
When the pitch of the screw gauge is 0.5mm, the total number of the circular scale is 50, calculate the least count. |
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Answer» Answer: =>Least count :0.5/50=0.01mm Explanation: 2)This is given in Question: "Before starting the measurement, it is FOUND that when the two JAWS of the screw GAUGE are brought in contact, the 45th division coincides with the main scale line and that the zero of the main scale is BARELY VISIBLE. |
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| 2246. |
calculate the density of a body which weighs 15 Newton in air and 12 Newton in water (density of water is equal to 1000kg/m³) |
Answer»
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| 2247. |
20) Calculate the equivalent resistanceof a wire of resistance 10 ohm isdivided into to two equal parts andconnected in parallel & [2018] |
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| 2249. |
What is constant potential difference? Only definition pls |
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Answer» Answer: potential difference is the difference in between the potential of 2 OBJ Explanation: LIKE object on top of BUILDING has high potential and the obj on GROUND has less potential |
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| 2250. |
If a man's face is 20 cm in front of concave shaving mirror producing erect image 1.5cm times the size of face , focal length of the mirror would be A)75 cm B) 25 cm C) 15 cm D) -60 cm |
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Answer» Answer: - 60 cm Explanation: Focal LENGTH,f=? object distance is= - 20 cm Magnification,1.5 = - v ÷ - 20 v= 30 cm using the MIRROR formulae 1÷ v + 1 ÷ u = 1 ÷ F 1 ÷ 30 - 1 ÷ 20 = 1 ÷ F 2-3 ÷ 60 = 1 ÷ F = F = - 60 cm... Hope this answer helps u...✌✌✌ |
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