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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.
| 66701. |
A girl weighing 25kg while dancing exerts a force of 250N on the floor. Her Feet cover an area of 80 cm2 on the floor. The pressure exerted by the girl on the floor is ____. a. 2000N/cm2 b. 500000N/cm2 c. 200000N/cm2 d. 2000N/m2 |
| Answer» 500000 N/cm2Explanation:B BBBB 500000 n/cm2 | |
| 66702. |
a body on which a firce 5i^ +4j^ + 10k^ netwon acts is displaces from 2i^ +5j^ + 4k^ meter to 7i^+7j^ +8k^ meter. what is the kinetic energy gained by the body |
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Answer» Displacement = (7i^+7j^ +8k^) - (2i^ +5j^ + 4k^) = 5i^ + 2j^ + 4k^Kinetic ENERGY gained = WORK done = F . s = (5i^ +4j^ + 10k^). ( 5i^ + 2j^ + 4k^) = 25 + 8 + 40 = 73 |
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| 66703. |
What is troposphere??? |
| Answer» TION:The troposphere is the LOWEST layer of Earth's atmosphere, and is also where nearly all weather conditions take place. It CONTAINS 75% of the atmosphere's mass and 99% of the total mass of water vapour and aerosols..HOPE its help. | |
| 66704. |
Write the following statements true or false. 1. Influenza is a disease of the respiratory system. 2. During the day the wind speed is from land to sea. 3. Urea is a nitrogen nutrient. 4. Inertia is a scalar quantity.please answer asap , if you won't you'll fail |
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Answer» 1 True2 False3 TRUE as urea has 46 PERCENT of nitrogen4 True |
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| 66706. |
ਸਟੈਂਡਰਡ ਟਰੈਕ ਦੀ ਦੂਰੀ ਕਿੰਨੀ ਹੰਦੀ ਹੈ ? How long is a Standard track ?एक मानक ट्रैक की दूरी कितनी होती है? * (a) 400 ਮੀ. /400 मीटर / 400 meter (b) 600 ਮੀ. /600 मीटर / 600 meter (c) 800 ਮੀ. /800 मीटर / 800 meter (d) 1000 ਮੀ. /1000 मीटर / 1000 meter |
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Answer» 1000 METERS trackExplanation:pls MARK me as brainlist and thank pls |
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| 66707. |
1 2.345Which one of the following statements isincorrect?(a) Direct and indirect methods are used for themeasurement of physical quantities.(b) Scientific notation and the prefixes are used tosimplify numerical computation,(c) A dimensionally correct equation need not bea correct equation.(d) The SI units is based on six base units.(a)(b) |
| Answer» 2 is INCORRECT STATEMENT . | |
| 66708. |
A conducting spherical shell is given charge +2Q . a point charge +Q is kept inside the shell at point o as shown now if charge +Q is, shifted from point o to point p then magnitude of electric field at point A outside the shell will be |
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Answer» tion:Electric potential due to point CHARGE =k Rq Electric potential due to inner SURFACE of SHELL =− 2Rkq and electric potential due to outer surface of shell = 3Rkq V=k Rq − 2Rkq + 3Rkq = Rkq [1− 21 + 31 ]= 6Rk5q |
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| 66709. |
What is the equivalent capacitance between A and B - in the given figure (all are in farad)?(a) 13/18(b)48/13(c) 1/31(d) 240/71 |
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Answer» 48/13Explanation: |
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| 66710. |
Sabhi dost khidar chale gye koe on bhi hai |
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Answer» social site PAR AVAILABLE haiExplanation:sabhi dost khidar chale gye KOE on bhi hai social site par hai |
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| 66711. |
In a microscope the focal lengths of two lenses are 1.2 cm and 6.25 cm. If an object is placed at 2 cm and the final image is formed at 25 cm from eye lens. The distance between the two lenses is А)6.00 cm B)8.00 cm C)7.75 cm D)9.25 cm |
| Answer» ANSWER is 6.00cm is the RIGHT answer | |
| 66712. |
Carpets gunny bag are the examples of materials which reflects sound (T/F) |
| Answer» FALSE...EXPLANATION:HOPE this HELPS :) | |
| 66713. |
अरे, मला कशाची भीती? (विधानार्थी करा) |
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Answer» nderstand, Sorry!!A PUSH or PULL which CHANGES or tends to change SHAPE, size and direction of any object is called FORCE. |
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| 66714. |
Performance parameters of photodetector |
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Answer» The main PARAMETERS which DEFINE the behavior of an ultraviolet PHOTODETECTOR are respectively the response coefficient, the gain, the quantum EFFICIENCY, the bandwidth, the NOISE equivalent power (NEP) and the detectivity. |
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| 66716. |
When 500 voltage (u)A applied to the 2k ohm Resistance (R) then what will be Current (I) according to the ohm's law |
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Answer» tion:Explanation: Explanation: Explanation: Evolution is change in the heritable characteristics of biological populations over successive generations.[1][2] These characteristics are the expressions of genes that are passed on from parent to offspring during reproduction. Different characteristics tend to EXIST within any given population as a result of mutation, genetic recombination and other sources of genetic variation.[3] Evolution occurs when EVOLUTIONARY processes such as natural selection (INCLUDING sexual selection) and genetic drift act on this variation, RESULTING in certain characteristics becoming more common or rare within a population.[4] It is this process of evolution that has given rise to biodiversity at every level of biological organisation, including the levels of speciesExplanation: Evolution is change in the heritable characteristics of biological populations over successive generations.[1][2] These characteristics are the expressions of genes that are passed on from parent to offspring during reproduction. Different characteristics tend to exist within any given population as a result of mutation, genetic recombination and other sources of genetic variation.[3] Evolution occurs when evolutionary processes such as natural selection (including sexual selection) and genetic drift act on this variation, resulting in certain characteristics becoming more common or rare within a population.[4] It is this process of evolution that has given rise to biodiversity at every level of biological organisation, including the levels of speciesSRY I DON'T KNOW |
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| 66717. |
A convex lens forms a real image on a screen placed at a distance 60 cm from the object. When the lens is shifted towards the screen by 20 cm, another image of the object is formed on the screen. The focal length of the lens is: А)45 cm B)40 73 cm С)30 cm D)12 cm |
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Answer» tion:in OPTICS TOWARDS the direction of light is taken as POSITIVE against direction negativeso V is positive and u is negativeso by LENS formula1/v - 1/u =1/ftransforms to1/v + 1/u =1/f by signconvention |
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| 66718. |
What are the difference between elastic stress and thermal stress? |
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Answer» tion:it is measured as the ratio of CHANGE in orientation to the original orientation of a body .since STRAIN is a ratio,it is dimension LESS and there fore has no units.this is the main difference between thermal stress and strain |
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| 66719. |
A straight copper wire of length 1m weighing 50g is carrying a current of24.5A. It is held horizontally, in magnetic field, the magnitude of the magnetic field required to suspend the wire |
| Answer» TION:CHALO na janu tujhe patna ghuma DE | |
| 66720. |
. Read the passage and answer the following questions. (3) Jasdeep and her brother ride separate vehicles from Bathinda railway station to their home. The position - time graph for them is given below: (graph in the attachment below) (a) Who among Jasdeep and her brother is ahead at t = 0 s? (b) At t = 10 s, what is the difference between the position of Jasdeep and her brother? (c) Among Jasdeep and her brother who moves with a greater velocity at t = 0 s? |
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Answer» a) JASDEEP,b.equal no differencec.jasdeep |
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| 66721. |
Physical properties of metals? |
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Answer» hiExplanation:the ANSWER is in the ATTACHMENT |
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| 66722. |
Find the scalar and vector products of two vectors. A=(3i-4j+5k) and B=(2i+j-3k)? |
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Answer» Scalar product → -13Vector product → -7i - 19j - 5kStep-by-step explanation:For finding the scalar product:A . B= (3i - 4j + 5k) . (2i + j - 3K)= (3)(2) + (-4)(1) + (5)(-3)= 6 - 4 - 15= 6 - 19= -13For finding the vector product:We calculate this by using the determinant METHOD. (refer attachment)A × B= [(-4 × 3) + (5 × 1)] î + [(3 × 3) + (5 × 2)] - j + [(3 × 1) + (-4 × 2)]k= [-12 + 5] î + [9 + 10] -j + [3 - 8] k= (-7)î - 19j - 5 k= -7i - 19j - 5k |
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| 66723. |
Definiton of simple barometer |
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Answer» eter is a scientific INSTRUMENT used in meteorology to measure atmospheric PRESSURE. A simple BAROMETER consists of a long glass tube (closed at one end, open at the other) filled with MERCURY and turned UPSIDE down into a container of mercury.❤♥Hope it helps you♥❤ :- Answer by ayushi |
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| 66724. |
Which one is correct :- The glass vessel break when it falls on a hard floor. Becausea) Less contact time and less force appliedb) more contact time and less force appliedc) less contact time and more force applied |
| Answer» CANCEL my ANSWER it was SENT by MISTAKE | |
| 66725. |
6. A block of mass 2 kg is held at rest against a wall by applying a horizontal force of 50 N as shown in Fig. 8.37. Find : (i) Perpendicular reaction (R) on the block by wall. (ii) Force of friction (f) on the block (g = 10 m/s2) |
| Answer» LOOK at the PICTURE is there in your BOOK there is answerok EXPLANATION: look at the picture is there in your book there is ANSWER | |
| 66726. |
Define Centripetal Acceleration . |
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Answer» tion:Centripetal acceleration, the acceleration of a body TRAVERSING a circular PATH. Because VELOCITY is a vector quantity (that is, it has both a magnitude, the speed, and a direction), when a body travels on a circular path, its direction CONSTANTLY changes and thus its velocity changes, producing an acceleration.hope it HELPS youthanks |
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| 66727. |
By what connection are all the devices in the figure connected?Plz answer fast |
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Answer» Mesh Topology :In a mesh topology, every DEVICE is connected to ANOTHER device via the particular channel. Figure 1: Every device is connected with another via dedicated CHANNELS. These channels are KNOWN as linksHope u got it |
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| 66728. |
a steel wire 0.92m long has a mass of 5.0*10^-3kg.if a wire is under a tension of 80n.so what is the speed of teansveres waves. |
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| 66729. |
The velocity-time graph is given below for an object. Draw its acceleration-time graph |
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Answer» the VELOCITY of GRAPH is 4*4 = 16/ 45Explanation: MAKE it birlliant |
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| 66730. |
one mole ideal monoatomic gas undergoes a process A-B as shown in the figure the heat supplied to the gas during the process will be |
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Answer» okkkkkExplanation:kkkkkkkooookkkkkkkkkkkmmmmmmmm |
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| 66731. |
1. Two different masses are given by m1= ( 24.6±0.5) g ; m2= (16.7±0.3)g Calculate (i) m1+ m2 (ii) m1 - m2 |
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| 66732. |
Interplay between theory and experiment with example in physics |
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Answer» ical physicists DEVISE mathematical MODELS to explain the complex INTERACTIONS between matter and ENERGY, while experimental physicists conduct tests on specific physical phenomena, using advanced tools from lasers to particle accelerators and TELESCOPES, to arrive at answers. |
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| 66733. |
Energy of molecules in a liquid during evavoparation |
| Answer» SINCE the kinetic energy of a molecule is proportional to its temperature, evaporation proceeds more QUICKLY at higher temperatures. As the faster-moving molecules ESCAPE, the REMAINING molecules have LOWER average kinetic energy, and the temperature of the liquid decreases. | |
| 66734. |
Two helium nuclei are seperated by a distance 6nm what is electrostatic repulsion |
| Answer» ACCORDING to coulomb's law, F =(K Q q)/ F = ( 9 x 10^9) (9 x 10^9) (9 x 10^9) / ( 6 x 10^-9)² F = 25.6 x 10^-12 F = 25.6 pN | |
| 66735. |
What are the differences between elastic stress and thermal stress? |
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Answer» Thermal stress is mechanical stress that created by CHANGE in temperature of material.Thermal stress is useful in creating many electronic devices e.g air conditioner.Elastic stress is applied to POLYMERS like rubber, when stress applied its length volume and AREA changes ,applied stress is REMOVED (within elastic LIMIT) the body come back to its original position e.g spring , rubber" Steel is more elastic" |
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| 66737. |
Three point charges are lying as shown, Surface shown is imaginary Gaussian surface then find correct option: |
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Answer» Three point CHARGES are lying as shown, Surfaceshown is IMAGINARY GAUSSIAN surface then findcorrect option: |
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| 66738. |
Differtiate between first law and second law |
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Answer» The first and second law are the most frequently used laws in thermodynamics. The first law says that ENERGY can be neither created nor DESTROYED. The first law is simply ANOTHER version of the law of conservation of energy. The second law, on the other hand, asserts that some thermodynamic processes are FORBIDDEN. |
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| 66739. |
Why juice bottles are kept in ice Cubes. give reason? |
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Answer» so That it do not CATCH bacteria or fungus, and remains cool and HEALTHY for consumption |
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| 66740. |
1. The side of a cube is 7.2 m. Calculate its surface , by taking significant figures in to considerations. (Note: Surface area of cube = 6l2) |
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Answer» the side of the 72 component of example cube 612 is equal to 2 + 72 - through is equal to 61 upon a rational number is PAISE BISECTOR |
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| 66741. |
जाति सेआप कया समझते हैं। |
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Answer» यह संज्ञा का एक प्रकार है । जिसमें किसी की जाती का पता चलता हो । |
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| 66742. |
Define dimensions of a quantity |
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Answer» Dimension of a physical quantity is the power to which the FUNDAMENTAL units MUST be raised to, in order to represent it. MASS, length, TIME, temperature, ELECTRIC current, luminous intensity and amount of substance are the fundamental quantities. |
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| 66743. |
Which property of liquid is given ? |
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Answer» Physical property PLEASE mark me BRAINLIEST if don't CORRECT. please don't REPORT me. because i am following you. |
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| 66744. |
a person walks along a circular path of radius 150 M at a constant pace he completes one circle in 10 minutes in any 5 minutes of duration is average velocity is? |
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Answer» Let A & B represent the points of start and stop respectively, then we NEED to find the length of AB. Now the length of AB in circular path is the d = distance TRAVELLED, that is SIMPLY half of the CIRCUMFERENCE of the circle or:HOPE IT HELPS . |
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| 66745. |
if turns in primary are 100 and turns in secondary are 500 and voltage of 6 volt is applied at primary than what voltage will be at secondary? |
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Answer» no. of turns of primary coil N = 100no. of turns of SECONDARY coil n=500voltage ACROSS primary coil V= 6Vvoltage across secondary coil v= ?Formula; 100/500 = 6/v v =(6 X 500)/100 v = 30V Ans. |
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| 66746. |
Kya chiminey ka dhuaa eke suspension hai?? |
| Answer» SMOKE is a COLLOID, not a suspension.Other colloids are- cheese, butter, milk, MIST, CLOUDS, fog, hair cream, boot polish ETC.Other suspensions are- mud-water, flour-water, chalk-water etc. | |
| 66747. |
The rate of change of momentum of a body is equal to the______ acting on it. |
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Answer» e of change of momentum of the BODY is equal to the RESULTANT FORCE acting on it. ________________________________ |
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| 66748. |
If an object moves at a constant speed of 10 ms-1 on a circular path with radius r , then the object moves ______ A) constant velocity B) acceralation C) constant acceralation |
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Answer» (B)Explanation:In CIRCULAR motion, DIRECTION of particle KEEPS on changing as a RESULT velocity and accelerations also keeps on changing. But, the magnitude of acceleration REMAINS constant. So, correct option is B |
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| 66749. |
Explain how Newton's rings are formed? Show that the radius of dark ring formed by Newton's rings is proportional to square root of the order of the ring. |
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Answer» Which hindrance of commerce is highlighted in the following activities?a.It removes the geographical SEPARATION between producers and consumersb.Banking and financing institutions provide NECESSARY funds to carry on business activitiesc.Insurance protects the goods in case of damage due to theft, FIRE and accidents.d.Warehousing FACILITIES holding goods TILL they are required.10.Identify the types of industry highlighted in each of the following |
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| 66750. |
A bullet leaves a rifle with a muzzle velocity of 521m/sec . While accelerating through the barrel of the rifle, the bullet moves a distance of 0.840 m. Determine the acceleration of the bullet ( assume a uniform acceleration ). |
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Answer» jabsdjiExplanation: |
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