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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.
| 2. |
3. A person walks 4 meters east in 1 second then Walk 3 meters north in 1 second. Determine -average speed and average Velocity |
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Answer» ONG>Answer:displacement=h²=b²+p² h²=4²+3² h²=16+9 h=root 25 h=5 average velocity=displacement /time v=5÷2 v=2.5m/s² average velocity=2.5m/s² average speed=total distance/ time average speed=7÷2=3.5m/s² average speed=3.5m/s² Explanation:PLZ mark as BRAINLIEST answer FOLLOW me |
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| 3. |
The resultant of two forces 2 N and 3 N is 19 N then the angle between the forces |
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Answer» ve PROVIDED you the ANSWER in the above ATTACHMENT. |
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| 4. |
A force F is applied on a square area of side L. If the percentage error in the measurement of L is2% and that in Fis 4%, what is the maximumpercentage error in pressure?(2) 4%(1) 2%(3) 6%(4) 8% |
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Answer» ENTAGE error in L=2%P> Percentage error in F=4% We know that, P= A F = L 2
F
P △P ×100= F △F ×100+2 L △L ×100 =[4+2(2)]% = 8%. |
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| 5. |
Why we store sliver chloride in dark coloured bottles? |
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Answer» ong>ANSWER: Explanation: We store SILVER chloride in dark coloured bottles because the dark coloured bottles INTERRUPT the path of light and it almost BECOMES impossible for the light to reach silver chloride in the bottles and thus, its decomposition is prevented. |
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| 6. |
The focal length of a convex mirror is 7.5 cm and object 1 cm hai produces an image 0.6 hai when it is kept in front of convex mirror find the position of object from the mirror |
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Answer» ONG>Answer: The MAGNIFICATION is GIVEN as, m=− u v
0.6=− u v
The mirror formula is given as, v 1
+ u 1
= f 1
0.6u 1
− u 1
= f 1
u=5cm Thus, the distance from the mirror is 5cm. |
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| 7. |
A body covers 20m in 2minutes calculate its speed in meter per second and km per hour |
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Answer» Given:-
To Find:-
Solution:-Firstly we convert the UNIT here 1 min = 60s ∴ 2min = 2×60 = 120s Now we KNOW that , → Speed = Distance/timeThe speed of body in m/s → S = d/t Substitute the value we get → S = 20/2 → S = 10m/s ∴ The speed of body in m/s is 10m/s. Now speed of body is km/h Here we convert the unit 1km = 1000m ∴ 20m = 20/1000km = 0.02km And time 1hour = 60min ∴ 2 min = 2/60 = 1/30= 0.03 → Speed = distance/time → Speed = 0.02/0.03 → speed = 0.66km/h ∴ The speed of body in km/h is 0.66km/h. |
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| 8. |
initial temperature of a liquid is T1 =( 25.4±0.1)℃, and on heating its final temperature is T2 = (52.7±0.2)℃. Find the increase in temperature |
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Answer» ong>Answer: initial TEMPERATURE of a LIQUID is T1 =( 25.4±0.1)℃, and on heating its final temperature is T2 = (52.7±0.2)℃. FIND the increase in temperature Explanation: initial temperature of a liquid is T1 =( 25.4±0.1)℃, and on heating its final temperature is T2 = (52.7±0.2)℃. Find the increase in temperature |
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| 9. |
Define force and mention its 2 effect |
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Answer» ong>Explanation: A FORCE acting on an object causes of the object to change its shape or size, to start MOVING, to stop moving, to accelerate or decelerate. when there's the interaction between two objects they exert a force on each other, these EXERTED forces are equal in size but opposite in directions.❤❤ Hope it help you❤❤Please follow me guys..... |
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| 11. |
Find pressure when a thrust of 20n is applied on a surface area of 5m2 |
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Answer» ONG>ANSWER: 4 PASCALS Explanation: the formula of pressure is force/area so we divided 20 by 5 to get the final answer |
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| 12. |
Q9. A spherical mirror and thin spherical lens have each of focal length -15cm. The mirror and lens are likely to be : * 1 pointBoth concaveBoth convexMirror is concave and lens is convexMirror is convex and lens is concave guys answer fast please....my test is going on.... |
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Answer» ong>ANSWER: both CONCAVE because it is GIVEN in minus Explanation: hope it HELPS you |
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| 13. |
Whatare the units for mass |
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Answer» ong>Answer: si UNIT of MASS is kg.... HOPE this HELPS n marks as brainliest |
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| 14. |
In a hydraulic machine, a weight of 40 N is placed on the smaller piston whose area is 8 cm2. i. How much pressure will it exert on the larger piston whose area is 5 m2? ii. How much weight can be lifted by the larger piston? iii. What is the mechanical advantage of the machine? |
Answer» ONG>Answer:First you mark me BRAINLIEST then get answer |
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| 15. |
Mention one use of a concave mirror |
Answer» ONG>Answer:
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| 16. |
Ctis kinetic energywhat |
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Answer» ong>Explanation: Kinetic energy is the energy of MASS in MOTION. The kinetic energy of an object is the energy it has because of its motion. ... Note that energy is a scalar quantity, i.e., it does not DEPEND on DIRECTION, and it is always POSITIVE..... |
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| 17. |
If electron, Hydrogen, Lithium and sodium nuclei are moving with the velocity of light, then the wavelengths associated with these particles are in the order?(A) Electron > Hydrogen > Lithium > Sodium(B) Electron > Sodium > Hydrogen > Lithium(C) Sodium > Lithium > Hydrogen > Electron(D) Electron > Lithium > Sodium > Hydrogen |
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Answer» ong>Answer: Explanation: ACCORDING TO DEBROGLIE EQUATION WAVELENGTH = h/mv here v= velocity of LIGHT h = 6.63×10^-34 thus wavelength ∝ 1/mass when mass increases wavelength decreases since there are inversely proportion according to increase in mass ORDER is electron < hydrogen < lithium < sodium according to wavelength order ∴electron > hydrogen > lithium > sodium thus answer is OPTION A |
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| 18. |
4. Define isotone with example |
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Answer» ong>Explanation: Two nuclides are isotones if they have the same neutron NUMBER N, but different proton number Z. For example, boron-12 and carbon-13 NUCLEI both contain 7 NEUTRONS, and so are isotones. ... In contrast, the proton numbers for which there are no stable isotopes are 43, 61, and 83 or more. |
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| 19. |
The neck and bottom of a bottle are 2 cm and 10 cm in diameter respectively. The bottle is completely filled with oil. If cork in the neck is pressed with a force of 12 N, what force is exerted on the bottom of the bottle? |
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Answer» ong>Explanation: A RECTANGULAR block has DIMENSIONS 4m × 3M × 2M. we have to find the ratio of the pressure exerted by the box with surface of contact 4m × 3m and 3m × 2m solution : let force exerted by the box with each surface of contact is F. we know, pressure is the ratio force to the area of surface of contact. as force remains constant. so pressure is inversely proportional to area of surface of contact. i.e., P₁/P₂ = A₂/A₁ = (3m × 2m)/(4m × 3m) = 6m²/12m² = 1/2 Therefore the ratio of the pressure exerted by the box with surface of contact is 1 : 2. |
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| 20. |
Instantaneous acceleration at t=2.0 s |
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Answer» ONG>Answer: a = 19.22 m/s − 18 m/s 3.1 s − 3 s Explanation: We already know that the velocity v 1 at instant t 1 is 18 m/s. So, when the INTERVAL of TIME Δt is between 3 s and 3.01 s, the average acceleration is 12.02 m/s 2. ... Definition and FORMULA for instantaneous acceleration. |
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| 21. |
the body is rotating with uniform angular velocity (w) having rotational kinetic energy whats it angular momentum is? |
| Answer» ONG>Answer: | |
| 22. |
Three capacitors of 4uF each are to be connected in such a way that the netcapacitance is 6uF. Then |
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Answer» ong>ANSWER: TWO in SERIES and one is parallel Explanation: |
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| 24. |
Draw the Spherical mirrors and name its parts. |
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Answer» rical mirrors are the part of glass sphere whose INNER or OUTER SIDE is polished and non-REFLECTING. Most of the curved mirror is a spherical mirror. If the reflecting surface of a spherical mirror is concave,it is called a concave mirror. If the reflecting surface is CONVEX,then it is a convex mirror. please like |
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| 25. |
Tha strength of the magnetic field between the poles of an electromegnetic would be unchanged if ? |
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Answer» ong>ANSWER: It would remain unchanged if the current in the ELECTROMAGNETIC winding are reversed HOPE it helps and do mark it as the BRAINLIEST if it helps
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| 26. |
What are the units for mass |
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Answer» nit of Mass Other units that are accepted for use in SI are gram (G) and its multiples and submultiples, a tonne (t) (or “metric ton”), electronvolt (EV), the atomic mass UNIT (U) which is most convenient for expressing the MASSES of atoms and molecules. |
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| 27. |
Obtainedexpression for resultant resultant electric field dueto numberof changes. |
| Answer» ONG>ANSWER: | |
| 28. |
- Silica has an estimated fictive temperature 14ookgwith an Tsothermal compressibilityall 7 x 10" m2 N"' [RY 197. The practiegindex and the photo elastic coefficient forSilica 1.46 and 0.206 respectively.Determine the theoretical attenuation indecibelsper kilometer due to thefundamental Rayleigh scattering insílica at optical wavelengths of 0.63,1:00, and 1.304m. Boltzmann's constantis 1.381x 10 21 JK". |
Answer» ONG>ANSWER:hmmmmmmmmmmmmmmmmmmm.........mmmmmmmmm............................................................. |
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| 29. |
यदि किसी एक ग्रह पर एक पिंड को 5 m ऊपर से नीचे आने में 5 सेकंड लगते है तो उस ग्रह पर गुरुत्वीय त्वरण कितना होगा ? |
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Answer» ER: I don't Explanation: |
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| 30. |
Find the correct relation. Thermal power station: chemical energy to electrical energy Nuclear power station: ________________ to electrical energy 1. Hydro Energy 2. Nuclear energy 3. Mechanical energy 4.Thermal energy |
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Answer» ONG>EXPLANATION: NUCLEAR energy is the answer.. |
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| 31. |
if R1 has 5 volt and R2 has 5volt . R1&R2 are connected in parallel & R3 has 6Volt . FIND Total Potential Difference |
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Answer» ONG>Answer: MARK my FRIENDS and I are you online and I Explanation: |
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| 32. |
Q 11/75 A uniform rope of mass m is tied to a block of mass M and a constant force Fis exertedon the rope in the vertically upward direction asshown. The force that the rope exerts on theblock, if both move upwards with constantacceleration is:mM |
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Answer» > |
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| 33. |
The good conductors of heat is |
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Answer» ong>ANSWER: the good CONDUCTORS of HEAT is SUN |
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| 34. |
I) A bus takes 40 minutes to cover a distance of 18km.Calculate its speed in km/h and m/s? ii) A car moving at an average speed of 45km/h takes 300minutes to reach its destination.Find the distance covered by the car. |
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Answer» ONG>Answer: 16 km in 40 minutes = 2/3 hours MEANS 24 km (16*3/2) in one HOUR. Hence speed is 24 km/hr 24 kmph = 24000 m/3600 a = 20/3 metres per SECOND Please vote me |
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| 37. |
The resultant of two forces 2 N and 3 N is V19 N then the angle between the forces(A) 300(B) 45°(C) 60°(D) 40° |
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Answer» ong>ANSWER: Explanation: A=2N B=3N and C= 4N. R²= A²+ B²+2ABcos∅ 4²= 2²+3²+2×2×3 cos∅ 16= 4+9+12 cos∅ 16= 13+12 cos∅ |
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| 38. |
Duration: Is P = i+j+k, 7 = 2i - j - kthenP - Q is(A) -1 +23 + 2(B) i - 23 - 2(C) i +2j+2(D) None |
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Answer» ong>Answer: |
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| 39. |
11,125 g ভরের এবং অনুভূমিক দিকে 30 m/s বেগে গতিশীল ক্রিকেট বল ব্যাটের আঘাতের ফলে বিপরীত দিকে 20 m/s বেগ পেল| সংঘর্ষকালS20হলে ব্যাট দ্বারা প্রযুক্ত বল কত?[125 N ] |
Answer» ONG>Answer:I can't understand this disco LANGUAGE... |
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| 40. |
Which affects the motion ofan obiect ? |
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Answer» ong>Answer: Objects change their motion because unbalanced forces act on them. There are FOUR main FACTORS that affect the motion of objects. These factors are force, friction, inertia, and momentum. Explanation: Thank you Hope this answer helps you PLEASE mark me as brainliest |
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| 41. |
Hi friends very good evening tell about atomic structure take free points but need correct answer wrong answer will be reported |
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Answer» ong>Answer: ATOMIC structure mean how atom should look LIKE mean OXYGEN 1 st ORBIT is COMPLETED and 2nd have four blvalency it is half |
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| 42. |
Determine the mass by mass percentage of 100 grams salt solution which contains 20 grams salt |
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Answer» ONG>ANSWER: The MASS by mass PERCENTAGE will be 20% Explanation: Mass by mass percentage=Mass of Solute/Mass of Solution i.e 20/100×100=20% |
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| 43. |
A ball of mass 100g travelling at 5m/sec and struck by bat so to return it along its original path with a velocity at 20m/sec.calculate the change momentum occurs in the motion of the ball by the force applied by the cricket ball |
| Answer» ONG>ANSWER: | |
| 44. |
State two ways to prevent the rusting of iron |
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Answer» ong>Answer: 1) APPLY grease |
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| 45. |
The displacement x(t) of a particle from its equilibrium position is described by the equation x = A cos(@t+Q), where A, w and o are constants. Find the velocity and acceleration of the particle at timet |
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Answer» ONG>ANSWER: SOLUTION is attached as Photo. looks like a Simoke Harmonic MOTION. |
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| 46. |
A ball dropped from a certainn height bounces progressively decreases heights ia an example of? |
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Answer» ong>ANSWER: INELASTIC collision with the floor : E = V rebound/ V Original it shows that energy is dissipated in every collision as 1- e^2 |
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| 47. |
What is the reaction of pressure with area on which it applied |
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Answer» ONG>EXPLANATION: AREA is typically measured in units of meters squared (m2). Since pressure is calculated by dividing force by area, it has units of Newtons per meter squared (N/m2), and this UNIT is given a new name, Pascals (Pa). |
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| 48. |
Find the value of resistance for the following colour are [3] i. Blue Green Red Gold ii. Brown Black Red Silver iii. Red Red Orange Gold iv. Orange White Red Gold v. Yellow Violet Brown Silver |
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Answer» here your ANSWER... |
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| 49. |
Why is earth terminal of a plug made thicker than life or neutral terminals????? |
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Answer» t REASON, to prevent the wrong way to operate a 3-pin plug and connected electrical MACHINE for the safety purpose. In other words, 3-Pin plug wont be connect to the socket upside down as the EARTH pin is THICKER, so it won't adjust and fit in another slot made for NEUTRAL or Live Pin in the socket. |
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| 50. |
Express each of the following in ms-¹i . 1km/hrii. 18 km/ min |
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Answer» m/hr = 1×5/18 5/18m/s 2)18km/hr 18×5/18 5ms-1 |
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