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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. |
Why a body cannot be inequilibrium due to singleforce acting on it? |
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Answer» Answer: a BODY cannot be in equilibrium due to single force ACTING on it beacouse THER is a need of EXTRA ANOTHER force which will equilate it |
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| 2. |
Show that Coulomb's law agrees with the Newton's third law. |
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Answer» Since both R21 and r12 are OPPOSITE in signs, they make forces of opposite signs too. This proves that COULOMB's Law fits into Newton's Third Law i.e. every action has its EQUAL and opposite reaction. Coulomb's Law provides the force between two CHARGES when they're present in a vacuum. |
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| 3. |
7. Two moving particles P and Q are 10 m. apart at a certaininstant. The velocity of P is 8 m/s making an angle of30° with the line joining Pand Q and that of Q ls 6 m/smaking an angle 30 with PQ as shown in figureThen angular velocity of P with respect to Qis:mus(a) zero(c) 04 rad/sec(b) 0.1 rad/sec(d) 0.7 rad/sec |
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Answer» Explanation: you are FINE friend |
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| 4. |
91.The position vs. time graph of a moving object is shown to theA right. What is the average speed from 4 s to 8 s?A. 0.5 m/sVB.1 m/sC.2 m/sD.3 m/sE.4 m/s |
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| 5. |
Can anyone know the ans for this question help me frnds................ |
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Answer» Answer: Explanation: S1 and s2 are the PLANO convex LENS. c1 and c2 are the centre of curvature of the lens s1 and s2. p is called the OPTICAL centre of the mirror. principal AXIS is the axis through which c1, c2, p passes. |
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| 6. |
7. How does atmospheric pressure vary withaltitude? |
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Answer» Atmospheric PRESSURE goes on decreasing with increase in height. For example,mountaineers often SUFFER from nose bleeding in high altitudes DUE to LOW atmospheric pressure. |
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| 7. |
Find the resistance |
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Answer» SRY BRO, didn't UNDERSTAND the QUESTION |
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| 8. |
Cchat will be the amount ofcoork donemove 2c chargeover 5V potential offerencein a conductor |
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Answer» your QUESTION is not UNDERSTANDABLE |
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| 9. |
The ratio of the speeds of amaretto and akbar is 8:5. if akbar takes 15 minutes more then amaretto to cover a certain distance , then find the time taken by akbar to cover the same distance. |
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| 10. |
a hundred metre long train crosses 500 metre long Bridge at a speed of 90 km per hour how much time will it take to cross the bridge completely pls ans.. step by step |
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Answer» Answer: Here, TIME taken by the train to PASS the bridge completely would be the time it takes to cover 1000 + 500 = 1500 m at the speed of 90 km / hr = 90 x (5/18) = 25 m / sec. Explanation: Pls mark me as brainlist. |
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| 11. |
Find the angle between two vectors 2N,3N, and their resultant is 5N |
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Answer» Explanation: 5*5 = (2*2) + (3*3) + (2*2*3)cosθ 25 = 4 + 9 + 12cosθ 12 = 12cosθ 1 = cosθ cos0 = cosθ θ = 0 |
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| 12. |
0.GIV6. It takes less time to cook vegetables in apressure cooker. Give reason.(0)(ii) |
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Answer» Answer: PLEASE mark as brainliest answerExplanation: Answer: the pressure INCREASES the temperature inside the cooker so it TAKES LESS time to cook VEGETABLES in pressure cooker. hope it helps you. |
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| 13. |
10. The density of copper is 8.9 g/cm3. Find itvalue in kg/m? |
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Answer» Answer: It is 8900. Hope it HELPS you my freind More explanation 1g/cm3 = 1000kg/m3 8.9=8.9×1000 8900kg/m3 Please follow me. Thank you or at least thank me |
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| 14. |
Why do we have different units for the same physical quantity? |
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Answer» Explanation:
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| 15. |
Define the term "barrier potential"for p-n junction diode |
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| 16. |
The reading of an ideal voltmeter in the circuit shown is1. 0.6V2. 0 V3. 0.5 V4. 0.4 V |
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Answer» where is CIRCUIT how can I answer |
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| 17. |
What was the competition about in the school and who won this?class 10 cbse --- the hundred dresses |
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Answer» Maddie and her friends later discover that Wanda is a very TALENTED ARTIST, and that her drawing of one hundred beautiful dresses has won the SCHOOL's art CONTEST. |
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| 18. |
Can we determine the mass of our moon if yes then how |
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Answer» येस वे कैन डिटरमिन दमा सपा वर्मा fs10 वीकेंड कमेंट बाय और ग्रेविटेशनल फोर्स विकास भी नेटवर्क एयरटेल 4G स्मार्टफोन बेस्ट थॉट ऑफ़ द डे बाय थैंक यू |
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| 19. |
Which of these is not a circuit element ? voltmeter resistorbatterypotntial diffrence |
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| 20. |
The maximum height of a uniform cylinder of diameter 0.8m that can be placed on the base on a rough inclined plane of angle 30° without the cylinder toppling over is what? |
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Answer» jxbsjxxddhdhsbdsjsnznxbakaabz cbcchdjebxbxnjxbssbahzjxbcchusnxxxbask |
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| 21. |
Ii. fill in the blanks6.alexander parkes 7. Terylene 8. Thermosetting plastics 9.blending 10.1946 |
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Answer» Answer: Hello Mate...!!!
Hope it will be helpful :)...✍️ |
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| 22. |
What would be the final velocity of a body thrown upwards with a particular velocity |
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Answer» Answer: if the final object is thrown upward with the velocity smaller than the ORBITAL, then the final velocity is zero, with a COUPLE of BOUNCES or Hollywood effects involved. the object just falls down . With enough velocity it can REACH the orbit and the final velocity will be , WELL, orbital Explanation: I hope it was helpful.. |
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| 23. |
How does a liquid pressure on a swimmer change if the swimmer moves horizontally |
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| 24. |
How to show the presence of atmosphere pressure, write the activity? |
Answer» heyyy❤hope it's usefull |
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| 25. |
Identify all the forces acting on an object at rest |
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Answer» Explanation: An object is at rest does not mean that no FORCE is acting on it. ... These are it's weight (gravity) and equal and OPPOSITE force from the GROUND (normal reaction). Since these FORCES are equal and opposite to each other, the vector sum of these equals zero and thus, the ball is in static equilibrium i.e. rest |
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| 26. |
Notes of metal and nonmetal class 8 |
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Answer» Answer: Metals All metals exist as SOLIDS EXCEPT mercury which is liquid at ROOM temperature. They can be DRAWN into wires, this is known as Ductility non metals They are generally soft, except DIAMOND. |
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| 27. |
Name the types of rocks |
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Answer»
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| 28. |
Q1) what is the formula of volume? Q2) what is the formula of mass? |
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Answer» PRODUCTS of all SIDES = volume mass = density × volume please like my answer and start FOLLOWING me |
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| 29. |
How do you derive expression for heat lost (or) gained by a substance ? (AS) |
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Answer» PERFORM the Calculation Multiply the change in temperature by the specific HEAT capacity and the MASS of your OBJECT. This will give you the heat lost or gained in joules |
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| 30. |
An energy of 24.6ev is required to remove one of the electrons from a neutral helium atom . the energy in (eV) required to remove both the electrons from a neutral helium atom is |
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Answer» HOPE it helps |
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| 31. |
The work done in moving a body of mass m uponinclined plane of an angle o, height h and length 1 is-(A) mgh(B) mgVh? +12(C) mgh sin e(D) mgh cose |
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Answer» Answer: The WORK done in moving a body of mass m upon inclined plane of an angle θ, height H and length l is |
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| 32. |
Illustration 1.15 A lump of ice of 0.1 kg at -10°C isput in 0.15 kg of water at 20°C. How much water and icewill be found in the mixture when it has reached thermalequilibrium? Specific heat of ice = 0.5 kcal/kg/K and itslatent heat of melting = 80 kcal/kg. |
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Answer» Explanation: (HEAT NEEDED TO CONVERT ICE FROM –10°C TO 0°C) +( HEAT NEEDED TO CONVERT INTO WATER AT 0°C)= ms(t2–t1) + mL = 0.1 * 0.5 * 10 + 0.1 *80 = 8.5 kcal WE ALSO HAVE WATER AT 20°C .... HEAT LOST IN CONVERTING WATER FROM 20°C TO 0°C = ms(t2–t1) = 0.15 * 1 * 20 = 3 kcal THIS HEAT IS NOT SUFFICIENT TO CONVERT ALL ICE INTO WATER ...... HENCE ONLY SOME AMOUNT OF ICE WILL MELT INTO WATER.... LET THAT AMOUNT OF ICE MELTED BE x kg Heat GAINED by ice = Heat lost by water x * 0.5 *10 + x*80 = 3 x(5+80) = 3 x = 3/85 x = 0.035 kg TOTAL WATER AT EQUILIBRIUM = 0.15 + 0.035 kg = 0.185 kg THANKS AND MARK ME AS BRAINLIEST. |
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| 33. |
work function of sodium is 2.35 eV what is threshold wavelength and frequency of light that causes the photoelectrons to be emitted , what is the maximum kinetic energy of photoelectrons if radiation of 1000 A° falls on metal surface ? calculate the stopping potential for radiation. |
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Answer» Answer: Explanation:hc÷threshhold wavelength= work function so wavelength= 1240÷2.35=527nm. Also frequency= 5.69×10*15 and KEmax = 10.05 EV and stopping POTENTIAL is 10.05 V |
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| 34. |
Why there is a need of secondcondition for equilibrium ifbody satisfies first conditionfor equilibrium? |
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Answer» Two equal but OPPOSITE forces acting on different line of actions rotates the BODY, although first condition is full FILED but body is still moving. Thus we need another condition for equilibrium. |
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| 35. |
a car travels 30km at a uniform speed of 40km/hr and the next 30km at a uniform speed of 20km/hr. find its overage speed. with full explanation? |
Answer» Given :▪ A car TRAVELS first 30km at a speed of 40kmph and last 30kmph at a speed of 20kmph. To FIND :▪ Average speed of car during the whole journey. Concept :☞ Average speed is defined as the ratio of total distanve travelled to the total time taken. ☞ It is a SCALAR quantity. ☞ It has only magnitude. ☞ It can't be NEGATIVE or zero. ☞ SI unit : m/s Calculation :→ VAV = (d1+d2)/(t1+t2) → Vav = (d1+d2)/[(d1/V1)+(d2/V2)] → Vav = (30+30)/[(30/40)+(30/20)] → Vav = 2×40×20/(40+20) → Vav = 1600/60 → Vav = 26.67kmph |
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| 36. |
Write down a derived unit which is expressed in terms of metre what is this unit for |
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Answer» Answer: There are MANY: meter squared for area, meter cubed for volume etc.. You PROBABLY know what is a physical QUANTITY and its two types: namely fundamental quantities which are independent of other quantities and derived quantities which are dependent on fundamental quantities. Anyway, Jksandilya |
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| 37. |
Why the field lines tend to expand lately? |
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Answer» PLEASE MARK my answer as BRAINLIEST |
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| 38. |
Momentum of a body increase from 20 kg m/s to 40 kg m/s then the force applied is |
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Answer» Answer: Explanation: force is equal to RATE of CHANGE of momentum so F = 40 - 20 = 20 N |
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| 39. |
How many electron should remove in a body to get a charge of 9nC |
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Answer» ONE ELECTRON should be REMOVED bro okk |
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| 40. |
A stight line in the velocity time graph indicates |
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Answer» it indicates ,CHANGE in velocity with respect to TIME MEANS ACCELERATION |
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| 41. |
Two sound waves have wavelength 85/170 and 85/172 m in air .each wave produces 4 beats per second with a third note of fixed frequency .find the frequency of the third note and sound in air |
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Answer» Each of these NOTES produce 4 beats/sec with a THIRD note of FIXED frequency. Find the frequency of third note and velocity of sound in air. Ans Data :- 2y = 85/170 m 22 = 85/172 m No. Beats = 4 Frequency =n=2 Yolcitofa. |
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| 42. |
a force of 50N acts perpendicular on a body which is fixed at a point o. the distance of point of action of force from o is 5cm.find the moment of force |
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Answer» Explanation: hope its HELPFUL |
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| 43. |
a stone is dropped from the edge of a roof. find time it to fall 4.9 m and it's velocity at this point. also find its acceleration after 2s of being dropped (g=10m-2) |
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| 44. |
Water does not run out of dropper unless therubber-bulb is pressed. Why? |
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Answer» Answer: The pressure in the dropper is EQUAL to the pressure OUTSIDE the dropper (atmospheric pressure). But as we PRESS the RUBBER TUBE pressure inside increases. As liquid flows from a region of high pressure to low pressure it flows out. NOTE- If we press lightly only some water comes out this is because with some force applied on the rubber tube the pressure quickly becomes equal after some water has come out.Explanation: hope it helps you plzz mark me as ur brainliast ❤️❤️❤️❤️ plzz follow me ❤️❤️❤️❤️ |
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| 45. |
4. While drawing water from a well with a bucket,the bucket of water appears to be lighter whenit is under water than when it is out of it. Givereason |
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Answer» This phenomenon occurred due to upthrust of the LIQUID in well in bucket, this upthrust means an UPWARD force which have a tendency of resistance to ENTER any SUBSTANCES in a liquid. |
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| 46. |
Define Compressibility. What is Compressibility ? |
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Answer» Answer: In thermodynamics and fluid mechanics, COMPRESSIBILITY is a measure of the relative volume change of a fluid or solid as a RESPONSE to a pressure change. In its simple form, the compressibility β may be expressed as , where V is volume and p is pressure. |
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| 47. |
a body is falling from a high minaret travels 40m in the last 2 seconds of its fall to ground. height of minaret in meters is |
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Answer» This problem can EASILY be solved with the help of equation of motion. s = UT + 1/2 at^2 40 = 2U + 1/2.10.(2)^2 40 = 2u + 20 2u = 20 u = 10 m /s Now, v^2-u^2 = 2as 2.10.s=100 s = 5m Hence the total DISTANCE traveled is 45M. |
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| 48. |
Activity 13.5 ch 13 class 10 science |
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Answer» Explanation: Ncert class 10 SCIENCE solutions 1. CHEMICAL Reactions and Equations Solved Questions Activity Solution 2. Acids, BASES, and Salts. Activity Solution 3. METALS and Non-metals. Activity Solution 4. Carbon and its Compounds. Activity Solution 6. Life processes. Solved Questions Exercise Solution MCQ Objective Questions Activity Solution Notes 7. Control and Coordination. Solved Questions Exercise Solution MCQ Activity Solution |
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| 49. |
State Coulomb's law.Show graphically the variation of (a) F and 1/r² and (b) F and r. |
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Answer» think , your question is -------Plot a graph showing the variation of coulomb force (F) versus (1/r²),where r is the distance between the two charges of each pair of charges:(1μC,2μC) and (2μC,-3μC).Interpret the graphs obtained. solution :- according to Columbus force , \bold{F\propto\frac{Q_1Q_2}{r^2}}F∝ r 2
Q 1
Q 2
Here Q₁ and Q₂ are the charge separated in r distance . HENCE, force , F_AF A
act between 1μC and 2μC , \bold{F_A\propto\frac{2}{r^2}}F A
∝ r 2
2
Similarly,force F_BF B
act between 2μC and -3μC , \bold{F_B\propto\frac{-6}{r^2}}F B
∝ r 2
−6
Now, here you can see that, |F_B|\ \textgreater \ |F_A|∣F B
∣ > ∣F A
∣ Hence, graph between F and 1/r² , will be straight line where line B has HIGHER slope than line A as shown in figure |
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| 50. |
Write the general expression of v and a (velocity & acceleration) in 3 dimension. |
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Answer» Given that, Velocity = v ACCELERATION = a We know that, Velocity : Velocity of the PARTICLE is rate of change of position of the particle. In mathematically form,
Where, v = velocity x = position of particle t = time The velocity in three dimension is Acceleration : Acceleration of the particle is rate of change of velocity of the particle. In mathematically form,
Where, a = acceleration v =velocity of particle t = time The acceleration in three dimension is Hence, This is required solution. |
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