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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. |
The speed of sound in air at 0°C is 331 m/s. What is the velocity of sound in air at a temperature of -30°C?a - 308 m/sb- 310 m/sc- 312 m/sd-314 m/se-316 m/s |
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Answer» Answer: |
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| 3. |
Distance time graph is a curve having decreasing slope |
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Answer» it SHOWS braking Explanation: |
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| 4. |
If a cyclist takes one minute to complete half revolution on a circular path of 120m radiuswhat is the average velocity1)1 m/s2)2 m/s3) 3 m/s4) 4 m/s |
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Answer» VELOCITY = DISPLACEMENT / TIME =120/60 = 2m/s Hope it HELPS! ! ! ! ! ! ! ! ! ! |
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| 5. |
On a 120 kilometre track A train travels the first 30 kilometre per hour at a must the train travel the next 60 kilometre per hour the entire trip?plz give right ans it is very important |
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Answer» the TRAIN takes 2 and HALF hours to COVER the TAKE I HOPE I AM RIGHT |
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| 6. |
What is the difference between velocity and speed? |
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Answer» VELOCITY is displacement/TIME whereas speed is DISTANCE / time.... can someone inbox me...pls |
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| 7. |
Why water is known as a universal solvent |
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Answer» Answer: water is called the "universal solvent" because it dissolves more substances than any other liquid. This is important to every living thing on earth. It is called the Elixir of life. water is a solvent due to the polarity of each water molecule. The hydrogen side of each water (H2O) molecule carries a slight positive electric CHARGE, while the oxygen side carries a slight NEGATIVE electric charge. This helps water DISSOCIATE ionic compounds into their positive and negative IONS. The positive part of an ionic compound is attracted to the oxygen side of water while the negative portion of the compound is attracted to the hydrogen side of the water. |
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| 10. |
For the eqation S=10t +4t^2 find acceleration of the body |
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Answer» Answer: 8 m/ s^2 Explanation: DIFFERENTIATE the expression we'll GET V= 8t + 10 then differentiate the above expression again to OBTAIN acceleration i.e. a= 8m/s^2 |
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| 11. |
Given vector a =2i-j+2k and vector b =-i-j+k. the unit vector of vector a-vector b is |
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| 12. |
hey guys here is ur que. - a ball is thrown vertically downward with a velocity" u" from a building of height "h". find the time taken by the ball to rich the ground. plz explain in understoodable manner |
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Answer» Answer: If it is a free FALL then , TIME taken = V= gt = t = v/ g HOPE it HELPS you |
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| 13. |
How much can be JouleEs heating produced in an ideal insulator? |
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Answer» Answer: It's ELECTRONS START vibrating to get FREE and move to produce heating effect but do not able to produce JOULES heating...... As it is not for INSULATOR |
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| 14. |
Which one of the following is not a charastetic of musical sound |
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| 15. |
The figure which you have shown in the answer please show the solution also |
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Answer» Answer: |
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| 16. |
What is the length of the tunnel which atrain 90m long travelling at 48km/hr can cross in 21 sec? |
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Answer» Sksajjnnamakaakkkkjjmsikssjsjmsmsmsskkskskksjskssjsjsmsmjsmssjsmsmkssksk |
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| 17. |
What is expectation value in quantum mechanics in schrodinger form? |
Answer» HEYA mate❤the EXPENSE of VALUE in QUANTUM |
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| 18. |
What is friction what are the two important properties of friction? |
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Answer» Answer: FRICTION MEANS the force which oppose motion when two has in CONTACT Explanation: two properties are - # useful in VEHICLES for brake purpose # used in industries for MANY purpose |
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| 19. |
What is electric circuit write the name of components of electric circuit? |
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Answer» Answer: the continuous and close PATH of electric current in which current flow easily is called electric circuit Explanation: resistor ,key ,battery , WIRES ,ETC are COMPONENTS of electric circuit |
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| 20. |
Can an object be accelerated if it is moving with constantspeed ? Justify your answer with an example? |
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Answer» Answer: no, because ACCELARATION means CHANGE in velocity/speed with TIME. but a/q object is moving with constant speed a=v-u/t |
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| 21. |
What is rate of reaction ? |
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Answer» The REACTION rate or rate of reaction is the speed at which REACTANTS are converted into products. For example, the oxidative RUSTING of iron under Earth's atmosphere is a slow reaction that can take many years, but the combustion of cellulose in a fire is a reaction that takes PLACE in fractions of a second |
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| 22. |
Q1) 1 are = ....km2Q2) 5kg/m3 = ....g/cm3 |
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Answer» Q1) Taking 1 are = 10² m², 1 m = 10^-3 KM Squaring both sides, 1 m² = (10^-3)^2 km² = 10^-6 km² MULTIPLYING 10² to both sides, 10² m² = 10² × 10^-6 km² Changing LHS, 1 are = 10^(2 - 6) km² 1 are = 10^-4 km²Q2) 1 kg = 10³ g 1 m = 10² cm Cubing both sides, 1 m³ = (10²)³ cm³ 1 m³ = 10^6 cm³ Now, 1 kg / m³ = [(10³) / (10^6)] g / cm³ 1 kg / m³ = 10^-3 g / cm³ Multiplying 5 to both sides, 5 kg / m³ = 5 × 10^-3 g / cm³Hence Converted! |
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| 23. |
What is the power of a concave lens whose focal length is -75.0 cm? |
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Answer» Answer: |
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| 24. |
Study the speed time graph of the body given and answer the following questioncalculate the retraction of the body |
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| 25. |
Distance time graph have a curve increasing slope |
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Answer» Yes, distance VERSUS time GRAPH have a CURVE increasing slope |
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| 26. |
We cant rejoin the broken chalk easily .give reason |
Answer» ANS -The CHALKS are made up of calcium CARBONATE. When it is broken, it breaks the chemical CHANGE and chemical change cannot be REVERSED. So, it does not rejoin anymore. The chalk is broken so it is made up of calcium carbonate and chemical changes may be changed. It does not rejoin. HOPE IT HELPS YOU...
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| 27. |
Racing car moving with constant acceleration covers two successive kilometres in 30 seconds and 20 seconds respectively find the acceleration of the car |
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| 28. |
A person uses concave mirror for shaving where should he position his face |
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| 29. |
What kind of force used while playing a trolley bag? |
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| 30. |
What will be the resultant velocity? |
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Answer» Velocity 1 = 30m/s east Velocity 2 = 40m/s north Then, ∅ will be equal to 90° CAUSE north and east direction are PERPENDICULAR to each other. RESULTANT velocity = since cos90° = 0 Magnitude of resultant velocity = 50m/s tanß = bsin∅/a+bcos∅ tanß = 40sin90/30+40cos90 tanß = 40/30 {because sin90° = 1 and cos90° = 0} tanß = 4/3 ß= tan-¹(4/3) in North of east Cheers! |
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| 31. |
A type of chemical readion in which a single paedusatacant decompse to form two or more productsknown as a chemical decompositionwhat is a chemical combination reaction |
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Answer» Answer: a REACTION in which two or more SUBSTANCES react to form a single COMPOUND is known as COMBINATION reaction ex- c+o2=co2 |
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| 32. |
Meaning of wooden Bolt |
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Answer» Hiiiii! wooden BOLT MEANS to move QUICKLY or refers to a stroke of lightning as "lightning bolt" I HOPE IT CAN HELP YOU. ........
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| 33. |
A scooter acquire a speed of 36 km/h in 10sec. After the start. Calculate the acceleration of scooter |
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Answer» Answer:36km/hr=36*5/18 =5*2=10m/s V=u+at V=10m/s , u=0 , a=? , T=10sec 10=0+a*10 A=10/10 A=1m/s^2 |
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| 34. |
The length of minute hand of a clovk is 5cm. Calculate its speed |
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Answer» length of minute hand here shows the RADIUS of the circle so distance travelled by it will be now speed =distance /TIME time taken by the minute hand to complete one revolution is 60 min. use the formula and u will get the Answer |
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| 37. |
The kinetic energy of the molecules increases with |
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| 38. |
Travels 20 cm in the first 0.2 seconds and 22 cm in the next 0.4 second what will the will it will be the velocity at the end of the 0.7 second of from start |
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Answer» Answer: 7m/s Explanation: At point of initial VELOCITY be 0 mper SEC.. acceleration be 22-20/.2= 10m/s' 2 Now, v= u+at we have v= 0+10×.7=7m/s Hope it HELPS you... Plz MARK it as BRAINLIEST... |
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| 39. |
Total volume of air person can expire after a normal inspiration is |
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Answer» The total VOLUME of air person can expire after a NORMAL inspiration is 500ML. #hope it helps you |
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| 40. |
To feel the temperature of water in three different container |
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Answer» first TAKE three beaker lable them A,B,C . in beaker A take some hot water.In breaker B take some cold water . in beaker C take both cold and and hot water . put your RIGHT hand in beaker A and your LEFT hand in beaker B for sometime and then put both the HANDS in beaker C. |
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| 41. |
Time taken by one complete oscilation on the density is called |
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| 42. |
Thw current from a battery flows from which to which terminal |
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| 43. |
Three charges +q +2q and 4 q are placed at point a, b,c and connected by strings |
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| 44. |
Three charged particles having charges q 2q q are placed in a line at points (-a |
Answer» i don't KNOW if you have any questions or CONCERNS please VISIT |
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| 45. |
7. Two point charges q, and q, are 3 m apart and their combined charge is 20 uC. If one repels the otherwith a force of 0.075 N, what are the two charges ?[Ans. 15 uC, 5 uC] |
Answer» HOPE this HELPS you ☺️☺️ |
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| 46. |
When v-t graph is parallel to x-axis the body is |
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Answer» the BODY is MOVING with constant velocity and is COVERING constant displacement in equal time interval. |
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| 47. |
how is the heat produced by a current passing through a constant resident related to the strength of the current |
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Answer» Answer: by the USING of a POOR or low capacity WIRE is low we can USE the high capacity wire |
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| 48. |
The question in my book says that a spoon can sound like a bell . Give reasons. |
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Answer» This is because of SONORITY of metals Explanation: Sonority means that when we hit a metal it produces a SOUND. So sonority occurs here as the SPOON and bell could be of same metal. |
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| 49. |
A car starts from rest and accelerates uniformly by 5 ms. Wesec?. How much distance is covered in above time interval?A bullet is fired with a velocity of 150mis. It penetrates a wood by 5 cm andretardation of the bullet and the time interval in which the bullet stops |
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Answer» Hope it helps¯\_(ツ)_/¯ Explanation: Here, initial velocity of bullet is u=367m/s and final velocity is v=0m/s. Distance traveled by bullet is d=0.0621m If a be the acceleration of bullet. Using v −u 2 =2ad 0 2 −(367) 2 =2A(0.0621) ⟹ a=−1.08×10 −6 m/s 2
(negative SIGN INDICATES deceleration of bullet means it slows down). |
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| 50. |
A person travels along straight line for first half |
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