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. |
Which of the following is not a lens mak-ers formula ?111)1 1 1v uf2 v= ufu-fv3) u= T-v4) All of these |
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| 2. |
If temperature is increased from 200 K to 800 K thenwhat would be the change in pressure at constantvolume?A) Increases by factor 4 C) Decrease by factor 4B) Increases by factor 2 D) Decreases by factor 2 |
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Answer» During the seventeenth and especially eighteenth CENTURIES, driven both by a DESIRE to understand nature and a quest to make balloons in which they could fly (Figure 1), a number of scientists established the relationships between the macroscopic physical properties of gases, that is, pressure, volume, temperature, and amount of gas. Although their measurements were not precise by today’s standards, they were able to determine the mathematical relationships between pairs of these variables (e.g., pressure and temperature, pressure and volume) that hold for an ideal gas—a hypothetical construct that real gases approximate under CERTAIN conditions. Eventually, these individual laws were combined into a single equation—the ideal gas law—that relates gas QUANTITIES for gases and is quite accurate for low pressures and moderate temperatures. We will consider the key developments in individual relationships (for pedagogical reasons not quite in historical order), then put them together in the ideal gas law. |
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| 3. |
14. Convert 10 mm of Hg to S.I. unit. The density of Hg is 13.6 x 10^3 kg m-3 and g= 9.8 m 3-2 |
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| 4. |
What is error also define its type |
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| 5. |
How many ohms resistor should i use to glow this bulb with 3.7v battery answer only if u know plz don't spam |
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Answer» I have subscribed to your CHANNEL now MARK me as brainliest and thank my 20 answer as U said |
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| 6. |
A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0m/s for 8.0s. How far does the boat travel during this time? |
Answer» <U>GIVEN:-Intial velocity of boat(u) = 0 Acceleration (a) = 3.0m/s Time (t) = 8sec Distance COVERED (s) = ? We know that = Ans:- Therefore, distance covered = 96m |
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| 7. |
Explain the concept of static friction with experiment |
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Answer» Explanation: STATIC Friction Theory: The coefficient of static friction µs can be measured experimentally for an object placed on a FLAT surface and pulled using a known FORCE. The coefficient of static friction is related to the Normal Force FN of the object on the surface, when the object just begins to SLIDE. |
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| 8. |
Your Physics book has a mass of 400g It is kept on a horizontal table. Taking g = 10m/s square, find the force ( both magnitude and direction ) exerted by the table on the physics book |
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Answer» solution: MASS of physics book(m) = 400g= 0.4kg g= 10m/s² according to Newton's third law of MOTION every action has equal and opposite reaction. force DUE book on table. F= mg= 0.4×10=4N in downward direction so the force on book by table is equal in magnitude but opposite in direction. F=-F table EXERT 4N force in upward direction. |
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| 9. |
The intestity of a sound is increades by 9 times . The percentage change in its amplitude will be |
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Answer» Answer: 200 Explanation: |
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| 10. |
How we find value of q1 and q2. In F=k q1*q2÷1 |
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Answer» Answer: Q1 = 1 q2 = 1 Explanation: |
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| 11. |
19 दिष्टधारा मोटर का वर्णन निम्न बिन्दुओं के आधार पर कीजिए(अ)नामांकित चित्र(ब)मुख्य भागों का वर्णन(स)कार्यविधि(द)उपयोग। |
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Answer» I don't know the answer If you FOLLOW me I will follow you back Try |
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| 12. |
Exact defination of self pollination |
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Answer» Self-pollination is when pollen from the same plant ARRIVES at the stigma of a flower (in flowering PLANTS) or at the ovule (in GYMNOSPERMS). ... Some plants have mechanisms that ENSURE AUTOGAMY, such as flowers that do not open (cleistogamy), or stamens that move to come into contact with the stigma. |
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| 13. |
the equation of tragectory of particle is y= 10x-5/9 x^2 where x and y are in mts, find the range of projectile |
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| 14. |
1 degree=______ radThe dimensional formula of boltzmann constant is |
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Answer» APPROXIMATELY 1 DEGREE =0.0175 RADIAN |
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| 15. |
an object is moving with uniform acceleration it velocity after5min is 25mpers and after 8s it is 34 find the distance traveled in 10 s |
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Answer» The ANSWER is 38.5m HOPE IT HELPS YOU. |
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| 16. |
a body is pivoted at a point .a force of 100 N is applied at a distance of 2 m from the pivot. calculate the moment of force from the pivot |
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Answer» Moment of force is calculated as: Force X (PERPENDICULAR distance between point of application of force and axis of ROTATION) But the unit should of the same system, SI or CGS Here, Force = 10 N Distance = 30/100 = 0.3 m Hence, Moment of force = 10x0.3 Nm = 3 Nm hope this helps..... please mark as brainliest
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| 17. |
5. A gradual rise in the barometric height is an indication ofO storm or cycloneОООdry weatherO extremely dry weatherOrain |
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| 18. |
If break down voltage of zener diode is 6 V then value of I2 will be :- |
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Answer» Current through the circuit , i= R+1 30
mA Voltage ACROSS 1 kΩ= R+1 30
.1= R+1 30
=V
(Since zener diode is voltage REGULATOR and regulates v z
across resistance R=1kΩ Also i=6mA (Given) R+1 30
=6 30=6R+6 24=6R⟹R= 6 24
=4 kΩ. |
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| 19. |
2. Explain non uniform motion with velocity-time graph. |
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Answer» Answer: Velocity-TIME Graph for a Non-Uniform MOTION If the velocity of a body changes uniformly with time, its acceleration is CONSTANT. The velocity-time graph for such a motion is a straight line INCLINED to the time axis. It means velocity increases by equal amounts in equal intervals of time. Then, acceleration of the body is given by,... If the rate of variance in the velocity is not constant, then such a motion called non-uniformly accelerated motion. The slope of the velocity-time graph will vary at every instant Explanation: pls mark as brainliest and thank my answer |
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| 20. |
The unit of electron density |
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Answer» UNITS. Electron DENSITY is measured in ELECTRONS per cubic ångström, E Å-3. Be Brainly ♥️ |
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| 21. |
I am in 9th and was doing advanced physics, and i came across this question: A charge q is placed at the point of intersection of body diagonals of a cube. The electric flux passing through any one of its faces is ____ I think the answer is q/(6εo) can you verify and explain |
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Answer» no...actually I am not in 9TH na THEREFORE. I am in lower CLASS... so sorry.. |
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| 22. |
4. The density of dry air isthat of moist or humid air.O less thanO more thanO equal toO cannot be compared |
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Answer» Answer: more than ✌️✌️Explanation: Humidity is water vapor, not liquid water, and water vapor molecules are lighter than the molecules of nitrogen and oxygen that MAKE up approximately 99% of the atmosphere. So, dry air is HEAVIER than humid air.hope this helps.....mark as BRAINLIEST
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| 23. |
An electro experience a force of 1.82×10¹⁴N in an electric field .the acceleration produced is |
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Answer» An electro experience a FORCE of 1.82×10¹⁴N in an electric FIELD . please mark as brainlist |
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| 24. |
Hi what is collision |
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Answer» Answer: A collision is the event in which TWO or more bodies EXERT FORCES on each other in about a relatively short time. PLEASE follow me and if this answer helps you please thank... |
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| 25. |
Unit - IGradient, Divergence and Curl of a vector and their significance, |
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Answer» Answer: We can SAY that the gradient operation turns a scalar field into a VECTOR field. ... We can say that the CURL operation turns a vector field into ANOTHER vector field. |
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| 26. |
A boy drags a suitcase along the ground with a force of 100 N. If the frictional force opposing the motion of the suitcase is 50 N, what is the resultant forward force on the suitcase? |
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Answer» Answer:50N Explanation: Fortunately, 'FORCE' is a vector. So if you know the STRENGTH and direction of each force, you can easily addum up and find the 'resultant' (net) force. When we talk in vectors, one newton forward is the negative of one newton backward. Hold that thought, while I slog through the complete SOLUTION of the problem. (100 N forward) PLUS (50 N backward) = (100 N forward) minus (50 N forward) = 50 N forward . Please mark me as BRAINLIEST |
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| 27. |
When two bodies are moving with same speed and in the same direction they will have |
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Answer» Answer: When TWO BODIES are MOVING with the same SPEED and in the same direction, then the relative velocity will be zero. |
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| 28. |
If A 3ˆi 4ˆj and B 7ˆi 24ˆj, the vector having the same magnitude as B and parallel to A is |
Answer» AnswerGiven -━━━━━━━━━━━━━ To find -VECTOR having same MAGNITUDE as B and parallel to A where
━━━━━━━━━━━━━ Solution -As the vector is having same magnitude as B - ━━━━━━━━━━━━━ For same direction along Unit vector in direction of A = ━━━━━━━━━━━━━ Required vector =━━━━━━━━━━━━━ Verification -Hence the vector having the same magnitude as B and parallel to A is ━━━━━━━━━━━━━ Thanks |
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| 29. |
If 50 N is applied on 10 sq metre surface then magnitude of pressure extended is |
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Answer» Answer: 5PAExplanation: = 50/10 = 5Pa |
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| 30. |
More examples of dimension stablish formula |
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Answer» you WRITE INCORRECTLY PLEASE CHECK....... |
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| 31. |
A uniform half meter rule AB is balanced horizontally on a knife edge placed 5cm from B with a mass of 80g at B .Find the mass of the rule |
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Answer» Mass of the ruler = 100g = 0.1 kg Length of the ruler l = 1m Moment of the unknown mass of the fulcrum is equal to mg(0.2) Moment of the mass of the ruler of the fulcrum is equal to (0.1)g(0.1) Because the system is in equilibrium so mg(0.2) = (0.1)g(0.1) => m = 0.05kg = 50g
The 50g mass is moved to MARK 10cm The moment of the fulcrum because of the above stated mass is (0.05)(g)(0.3) = 0.147 Nm The movement of the ruler about the fulcrum is (0.1)g(0.1) = 0.098 Nm The ruler will tilt towards the mass placed at 10cm mark To make the system equal let another mass 50g or 0.05kg be placed at xm from the fulcrum
Moment of the 50g mass at 10 CM mark is equal to moment of the ruler about the fulcrum + moment of the NEW 50g mass about the fulcrum =>0.147 = 0.098 + (0.05)(g)(X) => 0.049 = 0.49x => x = 0.1m = 10cm from the fulcrum Thus, the new 50g is placed at 50cm mark of the ruler PLS MARK BRAINLIEST |
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| 32. |
A car start from the point o and covers a distances to reach the point A then moves to B covers 3km find out distance and displacement |
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Answer» Answer: Distance and Displacement Definitions The distance is a scalar quantity (magnitude) that describes the LENGTH of the total path COVERED by a moving object. The displacement is a vector quantity (magnitude and direction) that describes the difference between the final and initial positions of a moving object. It is the SHORTEST distance MOVED in a certain direction. Both distance and displacement are MEASURED in unit of lengths. (centimeters, meters, kilometers,...) |
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| 33. |
by how much the speed of a body of fixed mass increase if its kinetic energy become four time in inertial kinetic energy |
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Answer» Answer: 2 times Explanation: |
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| 34. |
If the area of my head were 15 ×15 cm , how much force air will exert on my head |
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Answer» Answer: _______________________________________________ Area of the head is 15cm x 15cm = 225 cm² = 225 x 10⁻⁴ m². Atmospheric PRESSURE is (AVERAGE) = 1.01325 x 10⁵ N/m² or Pa. Let weight(force) of the air above is W N . W = 2279.8125 N. ______________________________________________ ❤️ |
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| 35. |
A train starting from rest attains a velocity of 72 km h -1 in 5 minutes.assuming that the accelertaion is uniform .find the distance travelled by the train for attaining this velocity. |
Answer» first we NEED to find the acceleration=v-u/t=a72kmh-1= 20ms-1so, a=20ms-1-0ms-1/5ma= 4m/s^2now second LAW S=ut+1/2at^2S=0×5+1/2×4×(5)^2S=2×(5)^2S=2×25S=50mSo, THEREFORE the distance is 50mHOPE IT HELPS MATE...... |
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| 36. |
Two resistances of a given material have same area of cross-section. If their lengths are 60cm and 80cm respectively the resistances are in the ratio(a) 3:4(b) 3:1(c) 4:3(d) 1:1 |
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| 37. |
A train is moving on a straight track of 100m andreaches a station in 5s. Calculate the speed of the train.The train “A” travelled a distance of 120km in 3 hours whereas another train “B” travelled a distance of 180km in 4 hours. Which train travelled faster? |
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Answer» 1. s= 100m t= 5s V= d/t = 100/5 =20m/s 2. s= 120KM t = 3HRS v= d/t = 120km/3hrs = 40km/hr × 5/18 = 600/18 = 33.33 m/s
s= 180km t= 4HRS v= d/t = 180km/4hrs = 45km/hr × 5/18 = 225/18 = 12.5m/s Train 'A' travels faster than Train 'B' |
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| 38. |
Which of the following is a vector |
Answer» Answer:SCALAR quantities are DEFINED by a MAGNITUDE with no applicable DIRECTION. In contrast, vector quantities must have both magnitude and direction of action. Some common scalar quantities are distance, speed, mass, and time. Some common vector quantities are force, VELOCITY, displacement, and acceleration.
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| 39. |
Determine the total distance and displacementtravelled by the boy from A to c a to c is 5 cm, c to b is 3 cm, b to a is 4 cm |
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Answer» answer in DISPLACEMENT is 0 |
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| 40. |
What is laten heat of vaporization |
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Answer» Answer: The enthalpy of vaporization, also known as the HEAT of vaporization or heat of evaporation, is the AMOUNT of energy that MUST be added to a liquid substance, to transform a quantity of that substance into a gas. The enthalpy of vaporization is a FUNCTION of the pressure at which that transformation takes place. |
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| 41. |
What is laten heat of fusion |
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Answer» The enthalpy of FUSION of a substance, also known as (LATENT) HEAT of fusion is the change in its enthalpy resulting from providing energy, typically heat, to a SPECIFIC quantity of the substance to change its state from a solid to a liquid, at constant pressure. |
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| 42. |
if angle of repose is theta the coefficient of static friction between body and the plane is???........plz explain |
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| 43. |
Please help me out??????????? |
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Answer» hiiiiiiiiiiiiiiiiiii |
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| 44. |
Give scientific reason paripats is the connection link between annelies and arthropoad |
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Answer» Answer: The living ANIMALS which posses some characters of two different groups of animal are called connecting link. Peripatus is a primitive arthropod having JOINTED PAIRED legs, compound eyes and tracheas like other ARTHROPODS but also displays certain ANNELIDAN characteristics, such as worm-like segmented body, non-chitinous cuticle and segmental nephridia. Thus, it forms a connecting link between Annelida and Arthropoda. Explanation: follow me. |
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| 45. |
WHAT WIILL THE T1 T2 MEAN TIME PERIOD T square Be FOR EFFECTIVE LENGHT 40 AS SHOWN IN THE PICTURE LIKE 50 60 70 80 90 100 ? |
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Answer» if pihwd0r20ii FHI hrw3vidqvru kdhdkahfeke Explanation: JF e0otebIhasodqitw0iteti |
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| 46. |
Pls solve it with explanation explanation explanation third part Explanation |
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Answer» what is the question please TELL you are doing a text PAPER i know in GOGLE form Explanation: Please follow me then i will follow you |
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| 47. |
If the distance-time graph of a particle is parallel to time axis,then how much is the velocity of the particle? |
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Answer» Answer: 0 Explanation: The distance-time GRAPH of the PARTICLE is PARALLEL to time axis. i.e.distance is not changing with the change in time.The particle is at rest. So velocity of the particle is 0 |
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| 48. |
an object moving with a velocity of 20m/s increases to velocity of 40m/s in 5sec if the mass of an object is 5kg find out external force acting on it |
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Answer» Answer: the required answer is 20 NewtonGIVEN:
TO FIND: external force, f KEYS:
FORMULAE TO BE USED:
f= ma
v = u + atSOLUTION: STEP 1: TO FIND ACCELERATION USING FIRST EQUATION OF MOTION Acceleration, a= 4 m/s^2 STEP2: TO FIND FORCE force is 20 NRELATED FORMULAE: FIRST EQUATION OF MOTION SECOND EQUATION OF MOTION THIRD EQUATION OF MOTION |
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How to find the angle between radius vector and velocity vector in uniform circular motion? Explain mathematically... |
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Answer» Answer: |
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