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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. |
A square and an equilateral triangle. a^2/2=b^,3^2=2b^2, 3b^2=2a^2,a^2=b^2/2 |
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Answer» Answer: 59e60457094670t7t069rofyodygkdietprydgfisyofifofdgogodtodtodtodfyodoydoydgodhkcgixgixxgooxgyodyoc |
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| 2. |
the focal lengths of a convex lens and concave lens are 10cm and 15cm respectively.Both lenses are kept in contact.An object is placed at a distance of 25cm from this combined lens. determine the position of image of the object |
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Answer» Given, f1=+10cm for convex lens f2=−20cm for CONCAVE lens The focal length of the COMBINATION is given by f1=f21+f21 f1=+10cm1+−20cm1=20cm1 f=+20cm |
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| 3. |
What is a multicellular organism |
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Answer» Multicellular organisms are COMPOSED of more than one cell, with groups of cells differentiating to TAKE on SPECIALIZED functions. In humans, cells differentiate early in DEVELOPMENT to become nerve cells, skin cells, muscle cells, BLOOD cells, and other types of cells. |
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| 4. |
When does the apparent weight of man disappear.what else do we call it?the reason say |
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Answer» Explanation: its your answer |
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| 5. |
An electric refrigerator rated 400 W operates 8 hours/day, 4 tubelightsrated 40 W operate 6 hours/day and a TV set rated 250 W operates4 hours/day. What is the cost of energy to operate them for the monthof November at the rate of 5.00 per kWh? |
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Answer» ENERGY of ONE DAY =Power×Time=400W×8h=3.2KWh Energy of 30 days =3.2KWh×30=96KWh So, cost of the energy =96×3=Rs.288 |
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| 6. |
If body mass of a block a and b are 3kg and 8kg respectively then normal reaction between a and b |
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Answer» Here is the ANSWER and HOPE it helps and please give me BRAINLIEST |
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| 7. |
Why did God choose to become human? |
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| 8. |
I need answers pls... correct answers of physics only. |
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Answer» (1) 11 A.M (2) 10 A.M (3) Decrease (4) 8 fishes (5) 4 fishes (6) 11 A.M (7) 10 A.M (8) 1 is the difference (9) 39 (10) Yes! [Hello!!! you're an Untamed fan and it's very NICE MEETING you, like there aren't any untamed fans here and I'm so happy to find you ;-; do you USE pin?] |
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| 9. |
The dielectric constant of an insulator can be |
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Answer» Glafief Explanation: |
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| 10. |
for a certain the low of machine is p=W/20. find efficiency of the machine for a load 1 KN if V.R is 40 Also Calculate the effect lost in friction. |
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Answer» Answer: A machine has velocity ratio 30, determine the EFFORT required to lift a load of ... 18. In a lifting machine P=0.1 W+10 ...N. If velocity ratio is 20..Find. 1) Max MA 2) ... Find the law of machine and Effort to lift load of 5 KN |
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| 11. |
What is the amount of work done to moves unit positive charge from one point to other |
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| 12. |
A 1.5kg weight was dropped from an unknown height. How fast was it moving if it had 55 J of kinetic energy? |
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Answer» Answer: CHOOSE any 2 BACTERIA 1 useful and 1 harmful and make a CONVERSATION between them |
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| 13. |
Molecules23. The average translational kinetic energy of02(molar mass 32) molecules at a particulartemperature is 0.048 eV. The translationakinetic energy of N, (molar mass 28molecules in eV at the same temperature is:1) 0.0015 2) 0.003 3) 0.048 4) 0.768 |
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Answer» ANSWER: Average TRANSLATIONAL K.E. of a molecule = 3 2 k T . It DEPENDS on TEMPERATURE and not on molecular mass. Hence average translational K.E. for N will ALSO be 0.048 eV |
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| 14. |
Differentiate between motion and displacement |
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Answer» Answer: MOTION:: Distance is a SCALAR QUANTITY that REFERS to "how much ground an object has covered" during its motion. DISPLACEMENT:: Displacement is a vector quantity that refers to "how FAR out of PLACE an object is"; it is the object's overall change in position. |
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| 15. |
A wire of 2 ohm resistance is doubled on itself. How will (i) resistanceand (ii) resistivity change? |
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Answer» RESISTENCE will INCREASED when the WIRE is doubled resistivity is CONSTANT |
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| 16. |
The error in the measurement of the side s of a rectangle is 2% what is the error in |
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Answer» yrr Kaya h tum QUES answer ques ans Kaya KARTE rehte ho sara din aur koi kan h bhi YA nhi |
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| 17. |
A rubber balloon filled with gas is released from a high-flying aeroplane state and explain what happens to its volume as it falls |
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Answer» Answer: When the BALLON is made of elastic material, it expands because of the excess PRESSURE INSIDE. Its VOLUME increases and its internal pressure decreases. As it expands, its buoyancy increases, but not the pull of gravity, so it continues to rise as a RESULT of the expansion. |
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| 18. |
Find the magnification of the convex lens object of height 9cms and the image height is 36cms |
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Answer» Magnification of image is, ∣m∣=2 as image size (h ′ ) is DOUBLE the object size (h) Thus, m=±2 as for a LESS, m= u v
(object distance =u , image distance =v) ⇒ u v
=±2 ⇒v=2u or v=−2u (i) CASE I : v=2u⇒u=v/2 then by lens formula, v 1
− u 1
= f 1
⇒ v 1
− v 2
= 20 1
⇒v=−20 cm (ii) case II : when v=−2u⇒u=−v/2, so v 1
− u 1
= f 1
⇒ v 1
+ v 2
= 20 1
⇒v=20/3 cm ∴ Image distance can be 20 cm (if image is virtual) on can be 20/3 cm (if image is real) |
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| 20. |
19. At what temperature the mean kineticenergy of hydrogen molecules increases tosuch that they will escape out of thegravitational field of earth for ever?(take v. = 11.2km/sec)1) 12075K2) 10000K3) 20000K4) 10059K |
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Answer» 1) 12075K 2) 10000K 3) 20000K 4) 10059K choose your answer |
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| 21. |
How many types of eye effects and what are they? |
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Answer» Answer: There are mainly THREE common REFRACTIVE defects of vision. These are (i) myopia or near-SIGHTEDNESS (ii) Hypermetropia or FAR – sightedness (iii) Presbyopia. Myopia is also KNOWN as near-sightedness. |
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| 22. |
A charge is placed in front of an infinite sheet of charge where the electric fieldacting on a given point is constant. Then what happens to the total electric fieldacting on the charge, if we go on adding such sheets at the opposite side of thecharge. |
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Answer» Answer: The force exerted by a charged particle on another charged particle depends on their separation distance, on their velocities and on their accelerations. In this Chapter we will CONSIDER the special case in which the source charges are stationary. The electric field produced by stationary source charges is called and electrostatic field. The electric field at a particular point is a vector whose magnitude is proportional to the total force acting on a test charge LOCATED at that point, and whose direction is equal to the direction of the force acting on a positive test charge. The electric field , generated by a collection of source charges, is DEFINED as where is the total electric force exerted by the source charges on the test charge Q. It is assumed that the test charge Q is small and therefore does not change the DISTRIBUTION of the source charges. The total force exerted by the source charges on the test charge is equal to The electric field generated by the source charges is thus equal to In most applications the source charges are not discrete, but are distributed continuously over some region. The following three different distributions will be used in this course: 1. line charge λ: the charge per UNIT length. 2. surface charge σ: the charge per unit area. 3. volume charge ρ: the charge per unit volume. |
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| 23. |
A 0.50 kg baseball was thrown with a velocity of 85 m/s. What is the ball’s kinetic energy? |
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Answer» K.E =1/2mv^2 KE=1/2×0.50×(85)^2 KE=1806.25 J |
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| 24. |
By using the definition of electric potential, obtain its three different equations. |
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Answer» V=IR where,V=voltage I=current R=resistance I=V/R R=V/I Heat=I^2RT |
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| 25. |
Write any few measures to control sound pollution? |
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Answer» Explanation: 1.turn of APPLIANCES at home and office 2.use EAR phones 3.lower the volume |
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| 26. |
4An object is placed at a distancedistance of 20 cm in frontof a Convex mirrors of focal length 30cm find theposition and nature of the Image |
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Answer»
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| 27. |
Which mirror can give virtual and magnified image of an object? |
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Answer» Answer: CONCAVE mirror when OBJECT is btwn pand f |
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| 28. |
जीव-विज्ञान के जनक के नाम से जाने जाते हैं ?(A) लैमार्क(B) डार्विन(C) अरस्तू(D) ट्रेविरेनसthanks my answer I will return |
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Answer» The CORRECT answer is option (c) अरस्तू I hope it helps you!! PLEASE mark me as BRAINLIEST. |
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| 29. |
.11 সবচেয়ে ভারী ক্ষারীয় মৃত্তিকা ধাতু কোনটি? |
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Answer» সবচেয়ে ভারী ক্ষারীয় মৃত্তিকা ধাতু হল -রেডিয়াম । |
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| 30. |
Explain laws of reflection? |
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Answer» Answer: STATES that when a ray of light REFLECTS off a surface, the angle of incidence is equal to the angle of reflection. Explanation: HOPE this help |
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| 31. |
A 750 kg car is travelling at 55 m/s. What is the car’s kinetic energy? |
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Answer» Answer: 1134375J Explanation: K.E. = 1/2 mv² |
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| 32. |
Draw the diagram showing the germination of pollen and on stigma and label female Germ cell |
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| 33. |
Riya observed that the rise in level of water in a measuring cylinder after immersing a stone in it was50mL. If the mass of stone was 15g then find the density of that stone. |
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Answer» Explanation: playboy lifestyle is the lifestyle of a wealthy MAN with AMPLE time for leisure, who demonstratively is a bon vivant who appreciates the PLEASURES of the world, especially the company of women. The TERM "playboy" was popular in the early to mid-20th century and is sometimes used to describe |
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| 34. |
(18)A charge +q exerts a force of magnitude 0.2 N on another charge - 2q. If they are separated by25 cm,determine the value of q. |
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| 35. |
two forces 15 N each acts on a bar at the end of A and B in opposite direction. what is the magnitude of resultant moment of force about O? |
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| 36. |
How high is an object if it has 100 J of potential energy and a mass of 5.5 kg? |
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Answer» How HIGH is an object if it has 100 J of potential ENERGY and a mass of 5.5 KG? |
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| 37. |
two point charges of 10miuC and - 5miuC are separated in air by 1m. the ratio of force exerted by one on the other is |
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Answer» Explanation: only we can SOLVE this PROBLEM by USING coulomb force relation. |
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| 38. |
Do not write your name or seat no. below this lineQ.No.Q.No.a.No.Determineахьgiven sî tsi't aCita |
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Answer» Answer: Pnk-pkjm-ohs jo in GI r LS th o se wh o r intr es TED in s EX Explanation: |
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| 39. |
The potential energy of a 25 kg object that is 25 m high is: |
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Answer» Explanation: =6250J |
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| 40. |
The train leaving the station at an acceleration of 0.2 m / s2 reached a speed of 20 m / s. How far had the train come by then? |
Answer» Given :• Acceleration of the train = 0.2 m/s² • INITIAL velocity of the train = 0 m/s • Final velocity of the train = 20 m/s To find :• Distance travelled by the train Solution :Here we SHALL use the third equation of motion to find the distance travelled by the train. Third equation of motion :-
where, • v denotes the final velocity • u denotes the initial velocity • a denotes the acceleration • s denotes the distance/displacement we have, • v = 20 m/s • u = 0 m/s • a = 0.2 m/s² Substituting the given values :- → (20)² - (0)² = 2(0.2)(s) → 400 = 2 × 2/10 × s → 400 = 4/10 × s → 400 × 10/4 = s → 100 × 10 = s → 1000 = s → The value of s = 1000 Therefore, the distance travelled = 1000 m |
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| 41. |
State the five postulates of kinetic theory of matter |
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Answer» Answer: There are spaces between particles of matter. The average AMOUNT of empty space between molecules gets progressively LARGER as a sample of matter moves from the solid to the liquid and gas phases. There are attractive forces between atoms/molecules, and these become STRONGER as the particles move closer TOGETHER. |
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| 42. |
The mass of an object that has 150 J of potential energy when it is 10 m high is: |
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Answer» PE = mgh g = 9.8 m/s^2 m = PE/gh = 150 / 98 = 1.53 kg |
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| 43. |
Starting from a stationary position,Rahul paddles his bicycle to attain a velocity of 6ms^-1 in 30s. Then he applies brakes such that the velocity of the bicycles come down to 4ms^-1 in the next 5s. Calculate the acceleration of the bicycle in both the cases ? |
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Answer» Then he applies brakes such that the velocity of the bicycle comes down to 4ms−1 in the next 5 sec. ... Now in the first CASE, Rahul paddles from the starting point so his initial velocity is ZERO and attains a velocity of 6 m/s in 30 sec. THEREFORE his final velocity is 6 m/s and he takes time 30 sec. Hope it HELPS |
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| 44. |
two spheres A and B of exactly same mass are given equal positive and negative charges respectively. their masses after charging will be |
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Answer» Answer: As the QUESTION states metallic conductors, only electrons move for GAINING or LOSING charges. Also, the net EXCESS of electrons is responsible for negative charge. Thus, A must have lost electrons and B must have gained them. Hence, Mass of A < Mass of B. Explanation: |
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| 45. |
A car starts from rest acquires a velocity of 180 m/s² in 0.05m/s². Find the acceleration |
Answer» Correct QUESTION :
AnsWer :
We can solve this question by using two methods/formulas :
So, you can USE both methods to solve this question. Here, I will use the second method i.e by using first kinematical equation of motion : ↠ v = u + at Here,
Plug in the known values in above given FORMULA: ↠ 180 = 0 + a(0.05 × 3600) ↠ 180 = a(180) ↠ a = 180/180 ↠ a = 1 m/s² ∴ The Acceleration (a) of the car is 1 m/s². |
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| 46. |
There are two statement rate of change of momentum crosseponds to kinetic energy rate change of momentum Crosseponds of forcewhichone of the following is correct |
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Answer» Answer: Communication is simply the ACT of transferring INFORMATION from one place, person or GROUP to another. Every communication involves (at least) one SENDER, a message and a recipient. ... These include our emotions, the cultural situation, the medium used to communicate, and EVEN our location. |
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| 47. |
What is the electric gkux of a sphere what th radius 4cm that contains a +50uC charge at its center? |
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Answer» Answer: Communication is SIMPLY the act of transferring information from ONE place, person or group to another. Every communication involves (at least) one sender, a message and a recipient. ... These include our emotions, the cultural SITUATION, the MEDIUM USED to communicate, and even our location. |
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| 48. |
Obtain the relation between coefficient of linear expansion & areal expansion |
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Answer» Explanation: The area thermal expansion COEFFICIENT relates the change in a MATERIAL's area dimensions to a change in temperature. ... The relationship between the area and LINEAR thermal expansion coefficient is GIVEN as the FOLLOWING: αA=2αL α A = 2 α L . |
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| 49. |
অথবাদৃশ্যমান কোন্ বর্ণের আলাের ক্ষেত্রে কোনাে মাধ্যমের প্রতিসরাঙ্ক বেশি? |
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Answer» zljfzjfslutlitsiltslitlitlugjfdhdkyyodhjjffjfjsjdhdjsisgeidyfhdbskzgsisgsjsisnvdkddenejejrhrkgrieteejgrrhrjrhdjdhdhdydhghhhgiggjhhjfhfhdjjdhdjdhskshdjdheehjdydshgeejyesjhdusgeheyehdhdhdndjdhdjdhdjdhejehdudhdhdhdujdjsbsjshdjdhdhdhdhfhfhfhfhfhfhfhfhfhfhfhfhfhfhhffhhfhfhfhffhhffhhfjdhsndjdhdkshdhdjksjdhejdjjsjdhdjjejdid |
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