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.
| 66301. |
A body of mass 20kg is kept at a height of 15m. Calculate the potential energy of the body. |
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Answer» when the BODY is RELEASED from a HEIGHT of 2 meters then all the potential energy will be converted to KINETIC energy.assuming base as a referencemgh+0=K.E.+0so K.E.=400JExplanation:please mark me as BRAINLIEST |
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| 66302. |
Question If the end of a ruler is broken, then start reading from 2.2 cm. The final reading of a pencil is 8.7 cm.What will be the actual reading of the pencil? |
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Answer» uuxucccicfiffofofid8r8fof9fot9t |
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| 66303. |
The figures shown below, what conclusion can you draw about the pressure exerted by liquids? |
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| 66304. |
A bodyfell from restfrom a height Habove the ground. In the last 1 sec of the its fall, it travelled a distance H/2. Find the value of H |
| Answer» SORRY I didn't KNOW the ANS of this | |
| 66305. |
The car battery has an e.m.f. of 12 V and, when the lamps are switched on, there is a current of 1.6A in each lamp. Calculate the resistance of one of the lamps. |
| Answer» 12V = V12 ok bro Explanation:PLAY MINECRAFT java edition and take a chill bro | |
| 66306. |
Factors affecting turning effects of force |
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Answer» The factors on which the turning EFFECT of force or torque ACTS are: - The magnitude of the applied force. - The distance of the line of ACTION of force from the POINT of ROTATION of that body.Explanation: |
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| 66307. |
The optimum speed of a car on a banked road to avoid wear and tear on its tyres is given by |
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Answer» the OPTIMUM SPEED of the car to avoid wear and TEAR On its TYRE is then . Take tan 150=0. |
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| 66308. |
Where should be the position of our eye while reading a scale? |
| Answer» PRECAUTIONS to be TAKEN while using a scale(2) While READING the scale, eye must be PLACED vertically above the scale mark being read. If the the eye is not vertically above the scale mark being read, then the reading becomes wrong. | |
| 66309. |
Odd one out give reason time , length , volume , temperature |
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Answer» temperatureExplanation:PLS GIVE me some DROP of THANKS pls ❤️ |
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| 66310. |
The dimension of (μ0 ε0)-1/2 is (a) length (b) time (c) velocity (d) force |
| Answer» SIMPLE ANSWER 20 velocituy | |
| 66311. |
Describe the procedure to make the sample of the following: 1 Ektara OR a toy telephone 2 A simple electroscope |
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Answer» AbstractSample preparation method is crucial in analytical chemistry and especially for the complicated matrices encountered in biological and environmental samples. The challenge in sample preparation in such analysis is the recovery of analytes in an isolate suitable for DETERMINATION at high sensitivity and specificity. Solid phase analytical derivatization (SPAD) combines ATTRACTIVE features of both solid phase extraction and analytical derivatization. As such it PROVIDES increase in sensitivity, specificity of detection for selected functional groups, low organic solvent consumption, ease of automation, high throughput and better separation in chromatography. In SPAD analytes are extracted onto a solid phase and derivatized in one single step. Over the years many SPAD based METHODS have been reported in LITERATURE using various combinations of solid phases, analytical derivatization reagents and detectors. |
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| 66312. |
Describe the procedure to make the sample of the following: 10 1 Ektara OR a toy telephone 2 A simple electroscope |
| Answer» SE are COUNTABLE QUANTITIES. | |
| 66313. |
Moment of force is ________ if it tends to rotate the body clockwise |
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Answer» moment of FORCE is negative if it tends to rotate the body clockwiseExplanation:hope it HELPS YOUHAVE a nice DAY ahead ✌✌ |
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| 66314. |
Comparison of unknown quantity with known quantity is called . |
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Answer» Measurement is a COMPARISON of an UNKNOWN quantity with a known FIXED quantity of the same kind. |
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| 66315. |
A bus starting from rest moves with uniform acceleration of 0.1m/s2 for 2 min find the distance travelled |
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Answer» ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm. What is S2? |
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| 66316. |
The known fixed quantity used for measurement is called . |
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Answer» tion:MEASUREMENT MEANS the comparison of an UNKNOWN quantity with some known quantity. This known fixed quantity is CALLED a UNIT. |
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| 66317. |
If an electric bulb has a rating 200W-220V and if it is used for 6 hours daily for 15 days, calculate the cost of using the bulbs at 50 paise per unit. |
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Answer» Total cost of using bulb = 9 Rs Explanation :Given :֎ Rating of electric bulb = 200 W - 220 V ֎ Power of electric bulb P = 200 W֎ Time for which bulb is daily used, t = 6 hrs֎ Number of DAYS for which bulb is used = 15 days֎ Rate of cost PER kWh energy = 50 PaiseTo find :Cost of using the bulb Formula will be used :֎ E = P× tHere, E is the electrical energy in Watt - hour unit ,P is the Power in Watt unitand t is the time in hours Solution :By using formula →Again, we know that, → 1 kWh = 1000 Wh therefore, Calculating total energy CONSUMED by bulb in 15 days Total Energy consumed = 15 × 1.2 KWh So , total energy consumed = 18 KWhNow, Calculating Cost of using bulb at 50 paise per KWh ⇨ Total cost of using bulb = 50× 18 paise = 900 PaiseConverting into Rupees, Total cost of using bulb = 900/100 Rs = 9 Rs |
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| 66318. |
Saririk sikhya sanu ki sikhaudi hai |
| Answer» HI I am INTERESTED in your QUESTIONS | |
| 66319. |
For a steam engine the following data is given piston diameter is equal to 0.24 metre length of stroke is equal to 0.6 metre length of connecting rod is equal to 1.5 m mass of reciprocating part is equal to 300 kg mass of connecting rod is equal to 250 kg speed of rotation is equal to 125 RPM centre of gravity of connecting rod from current pin is equal to 0.5 kg of the connecting rod about an Axis through the centre of gravity is equal to 0.65 calculate the inertia force at theta is equal to 30 degree from Ids |
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Answer» tion:do do dl in touch ckgvjdghg GO kick G y 40k you have FAILED and never quit but it may take longer and more likely be near a good RATE and then you are going out with them and then I have failed and never quit my kaa for that that is because that we are going out with a LOT and a few of our |
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| 66320. |
स्थित विद्युत बल नियतांक का अस आइ मात्रक क्या है |
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Answer» The Coulomb constant, the electric force constant, or the electrostatic constant (denoted KE, K or K) is a proportionality constant in electrostatics equations. In SI units it is EQUAL to 8.9875517923(14)×109 kg⋅m3⋅s−2⋅C−2.I hope it's HELPFUL to youplease mark me as BRANLIEST |
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| 66321. |
For rotational motion axis of rotational is* |
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Answer» Purely rotational motion occurs if every PARTICLE in the body moves in a circle about a SINGLE line. This line is CALLED the axis of rotation. Then the radius vectors from the axis to all particles UNDERGO the same angular displacement at the same TIME. The axis of rotation need not go through the body. |
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| 66322. |
Discuss analitically the formation of beats and show that the beat frequency equals the differwnce in freqensis of two infering waves |
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Answer» ahjajajajjanauajajshshahhah |
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| 66323. |
Property of light waves |
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Answer» There are three measurable properties of WAVE motion: amplitude, WAVELENGTH, and frequency. A definitive EXPERIMENT was YOUNG's double slit experiment, which demonstrated that light shined at two slits in a screen show an interference PATTERN characteristic of waves of light, rather than particlesExplanation:Mark me brainlieist please |
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| 66324. |
The result of any measurement will have a number and a . |
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Answer» (i) The result of a MEASURMENT MAY be absolutely PRECISE or it may have some uncertainty. ... (ii) Scientists have agreed that a NUMBER expressing a measurement will include all digits which are certain and a LAST digit whcih is uncertain. |
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| 66325. |
What is speed? Explain. Give me some thanks!! friends❤ |
| Answer» SPEED is the distance travelled by an OBJECT PER UNIT time. | |
| 66326. |
A gas contained in a cylinder fitted with a frictionless piston expands against a constant external pressure of 1 atm from a volume of 5 liters to a volume of 10 liters find work done by the gas in this process [1 atm =1.013x10⁵ Pa] |
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Answer» A gas contained in a cylinder fitted with a frictionless piston expands against a CONSTANT EXTERNAL PRESSURE of 1 atm from a volume of 5 liters to a volume of 10 liters find work DONE by the gas in this process [1 atm =1.013x10⁵ Pa] |
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| 66327. |
Find the temperature differnce if 50 kg of water absorbs 500 kilo joule of heat |
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Answer» Strategy The PAN and the water are always at the same temperature. When you put the pan on the stove, the temperature of the water and the pan is increased by the same amount. We use the equation for the heat transfer for the given temperature change and mass of water and aluminum. The specific heat values for water and aluminum are given in Table 1. Solution Because water is in thermal contact with the aluminum, the pan and the water are at the same temperature. CALCULATE the temperature difference: ΔT = Tf − Ti = 60.0ºC. Calculate the mass of water. Because the density of water is 1000 kg/m3, one liter of water has a mass of 1 kg, and the mass of 0.250 liters of water is mw = 0.250 kg. Calculate the heat transferred to the water. Use the specific heat of water in Table 1: Qw = mwcwΔT = (0.250 kg)(4186 J/kgºC)(60.0ºC) = 62.8 kJ. Calculate the heat transferred to the aluminum. Use the specific heat for aluminum in Table 1: QAl = mAlcAlΔT = (0.500 kg)(900 J/kgºC)(60.0ºC) = 27.0 × 104 J = 27.0 kJ.< Compare the percentage of heat going into the pan versus that going into the water. FIRST, find the total transferred heat: QTotal = Qw + QAl = 62.8 kJ + 27.0 kJ = 89.8 kJ. THUS, the amount of heat going into HEATING the pan is 27.0 kJ 89.8 kJ × 100 % = 30.1 % and the amount going into heating the water is 62.8 kJ 89.8 kJ × 100 % = 69.9 % Explanation: |
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| 66328. |
What is the time taken when, distance is 7150 km and speed is 780 km/hr. |
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| 66329. |
Dimension of light year |
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Answer» tion:Light-year, in astronomy, the DISTANCE traveled by light moving in a vacuum in the course of ONE year, at its accepted velocity of 299,792,458 metres per SECOND (186,282 miles per second). A light-year EQUALS about 9.46073 × 1012 km (5.87863 × 1012 miles), or 63,241 astronomical units. |
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| 66330. |
न्यूटन वह जूल के मूल मात्रक बताइए |
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Answer» सीजीपीएम ने 1 9 48 में तीन नई इकाइयों (अन्य लोगों के बीच) जोड़ा: बल की एक इकाई (न्यूटन), जिसे उस बल के रूप में परिभाषित किया गया है जो एक किलोग्राम के द्रव्यमान को प्रति सेकंड एक मीटर प्रति सेकंड का त्वरण देता है; ऊर्जा की एक इकाई (जूल), काम के रूप में परिभाषित किया जब एक न्यूटन के आवेदन के बिंदु में एक मीटर विस्थापित किया जाता है . |
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| 66331. |
Define the following terms a) Local length b) Principal axis |
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Answer» Principal axis: The line joining the centre of curvature and the optical centre is called the principal axis. Aperture: This is the length or breadth of the LENS through which REFRACTION takes place. Principal FOCUS: A LIGHT ray parallel to the principal axis of the lens meets at a POINT on the principal axis. |
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| 66332. |
3. A train starting from a railway station and moving with uniform acceleration attains a speed 40 km hrl in 10 minutes. Find its acceleration. |
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Answer» Given parametersInitial velocity (u) = 0Final velocity (v) = 40 km/hv = 40 × (5/18)v = 11.1111 m/sTime (t) = 10 minutet = 60 x 10T = 600 sAcceleration (a) =?Consider the FORMULAV = u + at11.11 = 0 + a × 60011,11 = 600 aa = 11.11/600a = 0.0185 ms-2 |
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| 66333. |
Write an experiment making simple electroscope |
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Answer» Procedure:Perform this EXPERIMENT on a dry DAY! ...Use the scissors to cut a two-inch long piece of STRAW.Have an ADULT PUNCH a hole through the center of the jar lid or piece of plastic big enough to fit the straw through.Insert the straw into the hole for your lid. ...Cut a 10-inch piece of copper wire. |
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| 66334. |
Please answer .It's important. Don't spam please . |
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Answer» tion:1. Identify whether a GIVEN SUBSTANCE is ACIDIC from the following reactions 2 - + 2504; 2H^ 2 50:; angle NAOH; L/4; Nh + OH |
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| 66335. |
A current carrying loop, free to turn, is placed in a magnetic field b. What will be its orientation relative to b in the equilibrium state |
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Answer» The CURRENT CARRYING circular loop behaves as a magnetic dipole of magnetic moment M acting perpendicular to its plane. The TORQUE on the current loop of magnetic dipole moment M in the magnetic field B isτ=MBsinα=IA×Bsinα,(∵M=AI)where α is the angle between M and B . The system will be in stable equilibrium if torque is zero, which is so if α=0 ∘ . This is possible if B is PARALLEL to A i.e. B is perpendicular to the plane of the loop. In this orientation, the magnetic field produced by the loop is in the same direction as that of EXTERNAL field, both normal to the plane of loop. It is due to this fact, the magnetic flux due to total field is maximum. |
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| 66336. |
Give reasons: (1) Two friends on the moon cannot hear each other's voices. (2) Echoes cannot be heard in a small room. |
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Answer» No, we cannot HEAR each other on the moon's SURFACE because sound REQUIRES MEDIUM for transmission. It cannot travel through vacuum. ... It's not going to be possible because it is is a vacuum because therefore sound cannot sound cannot travel through travel through a vacuum travel through vacuum. |
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| 66337. |
A farmer walks around a rectangular field of length 100m and breadth 80m. He walks along one length, one breadth and half a length more. Calculate the distance and displacement covered |
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| 66338. |
Given the nelwork shown in Figure determineI E, I and I .Il voltage across 90resistor |
| Answer» 26 26 iS a ANNSWER Explanation:9*#,;#;×;:÷:×:×::×:× | |
| 66340. |
What is BMS What is its function in an electric vehicle? |
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Answer» The main function of BMS is to ensure that the battery is protected and any OPERATION out of its safety limit is prevented. It monitors the battery pack's state of CHARGE (SOC) along with the state of HEALTH. ... Lithium-ion batteries that possess high charge density, power most electric cars.Explanation:mark me as BRAIN list |
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| 66341. |
How do you restore a lithium ion battery? |
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Answer» Seal the Li-ion battery in an AIRTIGHT bag and put it in the freezer for about 24 HOURS, ENSURING there is no moisture in the bag that could get the battery WET. When you take it out of the freezer, let it thaw for up to EIGHT hours to restore it to room temperature. |
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| 66342. |
Infrared emission from semiconductor materials |
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Answer» tion:The semiconductor luminescence equations (SLEs) DESCRIBE luminescence of semiconductors resulting from spontaneous recombination of electronic excitations, producing a FLUX of SPONTANEOUSLY EMITTED light. |
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| 66343. |
Physics is so hard subject? |
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Answer» based UPON uExplanation: if u THINK it's HARD it is, if ur weak at maths u have to just practice, don't PANIC u can do it |
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| 66344. |
Two pendulum p and q has legnth of string equal one Bob is of 10 gf and another is 20gf compair there time period |
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Answer» sameExplanation:time PERIOD of a pendulum only DEPENDS on the length of string and acceleration DUE to gravity so the RATIO of time period will be 1:1 |
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| 66345. |
Explain the method of preparing the alcohol starting with the carbonyl compounds |
| Answer» WANT to DRINK ALCOHOL | |
| 66346. |
3)A bus slows with constant acceleration from 24 m/s to 16 m/s and moves 50 m in the process. (a) How much farther does it travel before coming to a stop? (b) How long does it take to stop from 24 m/s? |
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Answer» (a) 40 m (b) 7.5 secExplanation:At first I've calculated the ACCELERATION of the bus using v^2 = u^2 - 2as formula. Then using the same formula I've calculated the ANWER a and the SECOND one is calculated using v=u - at. |
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| 66347. |
How do you charge a lithium-ion battery without a charger? |
| Answer» TION:CHARGE a Li-ion Battery Using USB Port. When you are in an URGENT need to charge a lithium-ion battery (6600-37) without a charger, the easiest and hassle-free way is to charge it with a USB port. To charge a li-ion battery (6600-37) using a USB port is simple & TRICKY. | |
| 66348. |
What is the advantage of integrated circuit? |
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Answer» The advantages of ICS : (i) Extremely small in size, (ii) Low power consumption, (III) Reliability, (iv) REDUCED cost, (V) Very small weight and (vi) Easy replacement. |
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| 66349. |
Do lithium-ion batteries require special charger? |
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Answer» You can use a LEAD acid charger on a lithium battery if you WANT, HOWEVER, you must NOT use a lead-acid charger if it has an AUTOMATIC “equalisation mode” which cannot be permanently TURNED off.Plz MARK as brainiliest |
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| 66350. |
At what voltage is a lithium-ion battery dead? |
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Answer» The voltage starts at 4.2 maximum and quickly drops down to about 3.7V for the majority of the battery LIFE. Once you hit 3.4V the battery is dead and at 3.0V the CUTOFF circuitry DISCONNECTS the battery (more on that later. |
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