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 standard formula for speed distance and time is? |
| Answer» ND!The ANSWER is SPEED = DISTANCE \ TimeHope it HELPS you. | |
| 2. |
Physics grade 12 answer fast 10point |
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| 3. |
Write stokes formula and explain. plz ans this question |
| Answer» FORMULA. F = constant × η a U . We SEE that, if the drag is proportional to the velocity, it NECESSARILY follows that the drag is also proportional to the linear dimension of the body (and to the viscosity of the liquid). | |
| 4. |
Physics grade 12 answer fast |
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Answer» To get my other 5.. I am ANSWERING.... Thankyou.. Explanation:Electric POTENTIAL energy, or Electrostatic potential energy, is a potential energy (measured in JOULES) that results from conservative Coulomb forces and is associated with the configuration of a particular set of point CHARGES within a defined system. |
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| 5. |
What is the strength of electric field inside a charged spherical shell |
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Answer» tion:spherical gaussian surface which lies just inside the conducting SHELL. Now, the gaussian surface ENCLOSES no charge, since all of the charge lies on the shell, so it follows from Gauss' LAW, and symmetry, that the electric field inside the shell is zero. |
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| 6. |
If you drop a rock and pebble,which will reach the ground first? |
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Answer» both will REACH at same TIME EXPLANATION: |
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| 7. |
Object distance=16cm magnification=3(real image) find image distance and focal length with using sign convention? |
| Answer» TION:ANSWER in the above PICTURE | |
| 8. |
State prinicple of conservation of energy. |
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Answer» the law of conservation of energy states that the total energy of an isolated SYSTEM remains CONSTANT, it is said to be conserved over time. This law means that energy can neither be CREATED nor destroyed; rather, it can only be transformed from ONE form to ANOTHER. |
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| 9. |
1. what does the odometer of an automobile measure? under what condition is the magnitude of average velocity of an object equal to its average speed? |
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Answer» When an object moves ALONG a straight line in the same direction, its TOTAL path length is the magnitude of DISPLACEMENT. HENCE its average speed is equal to the magnitude of average VELOCITY |
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| 10. |
Two 50 mu F capacitors connected in parallel are charged by using a 12.0V battery.As soon as the battery is removed then an insulator of dielectic constant kappa=5.0 is inserted to the filling spaces between these capacitors. Calculate the energy stored in the capacitor system after insertion of insulators between two capacitors. |
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Answer» hat,Capacitors = 50 μFPotential difference = 12.0 VWe need to calculate the net capacitorsUsing formula of parallelPut the value into the formulaWe need to calculate the chargeUsing formula of potential differencePut the value into the formulaWe need to calculate the energy STORED in the capacitor systemUsing formula of energyPut the value into the formulaThe capacitance increases as the dielectric constant K>1The capacitance increases then the energy will decrease.Hence, The energy stored in the capacitor system after INSERTION of insulators between two capacitors is 7.2 MJ. |
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| 11. |
A car cover a distance of 10km in 5minut calcite the distance in m/s |
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Answer» speed=dist/time=10*1000/5*60=33.33m/s |
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| 12. |
Plz help me guys answer fastly!!! I want all questions which I kept in photo |
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Answer» will U MARK me as BRAINIEST 1. distanceExplanation:2.acceleration 3.speed is constant4.draw the graph on ur own |
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| 13. |
Acceleration is vector quantity it indicates that |
| Answer» ACCELERATION INDICATES the rate of change of velocity on a moving object.Formula: a=(v-u)/ta = accelerationv = FINAL velocityu = initial velocityt = time | |
| 14. |
1. What causes an ice cube held in your hand to melt? a. Heat is conducted from your hand to the ice cube b. Heat is conducted from the ice cube to the surrounding air c. Heat is conducted from ice cube to your hand d. Cold is conducted from ice cube to your hand |
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| 15. |
Two blocks of iron of different masses are kept on a cemented floor which of them would require a large force to move it from rest position 1 unit or 2 unit |
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Answer» block of mass 2 units would require a larger force to move it from the rest position. according to Newton second LAW of motion, when a body is moving with an non-uniform velocity {i.e., accelerating motion}, body must experience by body is DIRECTLY PROPORTIONAL to its mass and acceleration. Viz, F=manow, you can say, if we want to move both the block with same acceleration then, force will be higher for higher mass and LOWER for lower mass.for instance,force on block of mass 1 unit, f=ahere, OBVIOUSLY F>f.so, block of mass 2 unit would require larger force to move it from the rest position.Explanation:HOPE WILL HELP YOUPLEASE MARK AS BRAINLIEST |
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| 16. |
Both blocks placed on smooth fixed inclined surface is shown in figure. Find the acceleration of block A. |
| Answer» PLEASE ATTACH the DIAGRAM too.... | |
| 17. |
Give one example which supports the statements that centifugal force is apparent |
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Answer» We experience it when we round a corner in a car or when an airplane banks into a turn. We see it in the spin cycle of a washing MACHINE or when children ride on a merry-go-round. One day it may even provide artificial gravity for space ships and space stations.But centrifugal FORCE is often confused with its counterpart, centripetal force, because they are so closely related — essentially two sides of the same coin.Centripetal force is defined as, "the force that is necessary to keep an object MOVING in a curved PATH and that is directed inward toward the center of rotation," while centrifugal force is defined as "the APPARENT force that is felt by an object moving in a curved path that acts outwardly away from the center of rotation |
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| 18. |
Draw the graph between electric field inside a solid sphere and distance r |
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Answer» Draw the graphs E Vs R in the following case : If a SOLID sphere of radius R with a total CHARGE Q on it is placed with its centre at the origin. ... ACCORDING to this law the electric field INSIDE the sphere is zero and the outside is same as the field from a point charge placed at the origin |
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| 19. |
I need these 2 questions please give the answer |
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| 20. |
Voltmeter needle shows deflection in the direction of flow of current or in the direction of electron flow? |
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Answer» When the CONNECTIONS are made, the voltmeter shows the voltage. As there is no direct way to access the voltage, voltmeters are designed as special sort of ammeter which can CALCULATE the voltage by assessing the ELECTRICAL current and applying Ohm's law.There are two kinds of voltmeters. One kind has a needle, or "pointer", that POINTS to a number that tells the number of volts. The second kind of voltmeter shows the numbers in a "digital" . This kind of voltmeter is not damaged from "wrong" connections; instead, they show a negative number.Explanation: |
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| 22. |
Show that maximum efficiency of a jet striking normallly on a series of flat plates arranged over periphery of runner is 50% |
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Answer» A FREE jet striking normally on a series of flat plates mounted on the periphery of a WHEEL.To Find:let us assummmeeeeeee that the efficiency of jet doesnt exceed 50%.Solution:Let we take:Density of fluid =Velocity of fluid = {Speed of wheel = Exit area of nozzle = Mass of fluid strike with blade is :Mass of fluid = m =Relative velocity of jet strike with blade with respect to blade = V- uWork done by jet on blade: = W = \= = = =On simplifying you will get:) = = From here, we see that efficiency of jet depend upon speed of wheel for a PARTICULAR value of speed of jet:On differentiating efficiency with respect to blade speed , we get: = This is required CONDITION of blade speed for maximum efficiency of jet:Putting value of U from equation 4 to equation 3): ==On solving , you willv get:= = 50%Hence prove that the efficiency of a free jet striking normally on a series of flat plates mounted on the periphery of a wheel can never exceed 50%.Explanation:look bro i had to all this atleast you can mark as brainliest wont you |
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| 23. |
Find the current in the circuit. |
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Answer» Here is your ANSWEREXPLANATION:GivenResistors of resistance 10ohm10ohm,10ohm,10ohm and 20 ohmVoltage of cell=40VTo find Current,I=??SolutionHere,1/Rp=1/r1+1/R2+1/R3+1/r4+1/r51/Rp=1/10+1/10+1/10+1/10+1/201/Rp=9/20Rp=20/9=2.22Therefore TOTAL resistance =2.22According to OHM's lawV=RI40=2.22×II=40/2.22=18.01 Ampere(approx) |
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| 25. |
Velocity time graph for moving object is found to be a curved line then it's acceleration is |
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Answer» In a velocity time GRAPH, when a LINE moves diagonally straight, it REPRESENTS uniform acceleration. If the graph is a decreasing curved line, it means it is not moving in uniform acceleration.if the graph is INCREASING then it means that the body is UNIFORMLY acceleratedExplanation: |
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| 26. |
Prove that the magnitude of the ratio of difference in speed after collision to the difference in the speed before collision for a 1D elastic collision is equal to one |
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Answer» Now, to solve PROBLEMS involving one-dimensional elastic COLLISIONS between two objects we can use the equations for conservation of MOMENTUM and conservation of internal kinetic energy. First, the equation for conservation of momentum for two objects in a one-dimensional collision is p1 + P2 = p′1 + p′2 (FNET = 0)orm1v1 + m2v2 = m1v′1 + m2v′2 (Fnet = 0),where the primes (′) indicate values after the collision. By definition, an elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals the sum after the collision. Thus,12m1v12+12m2v2212m1v12+12m2v'22(two-object elastic collision)expresses the equation for conservation of internal kinetic energy in a one-dimensional collision. |
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| 27. |
Give reason A nail penetrates deeper into a wooden board when a heavier hammer strikes it.. |
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Answer» I THINK the NAIL might turn and it might GET a little damagedhope it is CORRECT follow me |
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| 28. |
The acceleration due to gravity on jupiter surface is 25 m/s |
| Answer» THANKS for the informationand a MAKE mistake in SI unitplease don't forget to MARK it as BRAINLIEST and also click on a small HEART and follow me | |
| 29. |
Draw the diagram of uniform magnetic field |
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Answer» he attachment for your BETTER UNDERSTANDING..... PLZ... MARK as brainliest... |
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| 30. |
a particle moves from point A(5,4,9) to point B(9,7,21).Find displacement vector and magnitude of displacement |
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Answer» :Given -A (5, 4, 9)B (9, 7, 21)A particle moves from point A to point B.To Find -DISPLACEMENT vector ?Magnitude of Displacement ?SOLUTION -We know that, So, Hence,So, The Final Answer is :Now, Displacement = (4, 3, 12)Squaring and adding : 4² + 3² + 12²⇒ 16 + 9 + 144⇒ 169Finding its SQUARE root : √169 = 13 units.Hence, Magnitude of Displacement = 13 units. |
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| 31. |
Stak and prove law of conservation of momentum |
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Answer» conservation of momentum states that TOTAL momentum of SYSTEM remains conserved in the absence of EXTERNAL FORCE. Proof: Consider a body of mass m1 moving with velocity U1, striking against another body of mass m2 moving with velocity U2. ... Let v1 and v2 be the velcoities of two bodies after collision |
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| 32. |
Answer this and I will give you brainlest |
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Answer» The three resistor are connected in series with a BATTERY of 2V. R=R1 + R2 + R3 = 1+2+3=6 ohm. So, the CURRENT FLOWING in each resistor is the same. Hence, the potential difference across the 3 ohm resistor is 1V.Explanation:HOPE WILL HELP YOUPLEASE MARK AS BRAINLIEST |
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| 33. |
Two stones projected with |
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Answer» tion:TWO stones are projected with the same speed but making DIFFERENT angles with the horizontal. Their ranges are equal. If the angle of projection of one is π/3 and its MAXIMUM HEIGHT is h1 then the maximum height of the other will be. |
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| 34. |
8. A particle is thrown upward with some kinetic energy. What happened to its kinetic energy at the highest point or height it reaches? |
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Answer» particle is thrown UPWARD with some kinetic ENERGY then, it's velocity starts decreasing. Due to continuously decrease in velocity, Kinetic Energy also starts decreasing.We know that, K.E. = 1/2 mv²At the HIGHEST point, v = 0. So, K.E. = 1/2 m (0)²K.E. = 0Therefore, Kinetic Energy is also zero.At the highest point, Kinetic Energy becomes zero and Kinetic Energy CONVERTS into Potential Energy. |
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| 35. |
We know that the acceleration is the rate of changeof velocity a car is moving with constant show that acceleration is zero |
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Answer» tion:If a body is in LINEAR MOTION , and if velocity is constant , acceleration is ZERO , because acceleration is rate of change of velocity ! We need a change in velocity to calculate acceleration . Since it is constant , no change in velocity , no acceleration . Therefore acceleration is said to be zero .hope it HELPS U |
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| 36. |
MULTIPLE CHOICE QUESTIONS One Correct Answer Type1. The form of the dependence of the lift force per unit wing-span F (wingspan is the total length of the wings) on an air-craft wing of width L, moving with a velocity v through air ofdensity pis(a) F=kLv?p(b) F=kvp(c) F=kL’v?p?(d) F=kLvp(where k is dimensionsless constant) |
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Answer» a is the CORRECT ANSWER PLEASE MARK me BRAINLIEST |
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| 37. |
What is Electrical cell? Draw it's symbol. |
| Answer» ELECTROCHEMICAL CELL is a device capable of either generating electrical ENERGY from chemical reactions or using electrical energy to CAUSE chemical reactions | |
| 38. |
A flywheel used to prepare earthenware pots is set nto rotation at 100rpm. It is in the form of a disc of mass 10 kg and radius 0.4 m. A lump of clay (to be to taken equivalent to a particle ) of mass 1.6 kg falls on it and adheres to it at a certain distance x from the centre. Calculate x if the wheel now rotates at 80 rpm |
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Answer» Explanation:Moment of INERTIA of flywheel = MR^2/2I1 = 10 x 0.16 /2I1 = 0.8 kgm2w1 = 100 rpm I2 = I1 + mx^2w2 = 80 rpmaccording to law of conservation of angular momentum,I1w1 = I2w20.8 * 100 = (0.8 + 1.6x^2) * 80 CALCULATING the above,1.6x^2 = 0.2Hence,x = 1/2(ROOT 2)x = 0.35 m |
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| 39. |
Find square root of 2304 by by prime factorization urgent please |
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Answer» 48Explanation:2×2×2×2×2×2×2×2×3×3make PAIR of 2 same TERMS MARK as BRAINLIEST PLEASE |
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| 40. |
Answer this and I will give you brainlist |
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Answer» 5.option3.................N |
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| 41. |
પિચકની કેટલી ફી સમય કોષ તરાવસ્થામાં જ પસાર(A) 70 %(C) 92 %(B) 80 %(D) 95 % |
| Answer» SORRY but you can CONVERT it into ENGLISH | |
| 42. |
What is kinematics don't spam |
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Answer» the branch of mechanics concerned with the MOTION of OBJECTS WITHOUT REFERENCE to the FORCES which cause the motion. |
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| 43. |
What are the forces on a small sphere moving through viscous liquids. |
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Answer» There are three forces ACTING on an object falling through a VISCOUS fluid: its weight W, the viscous drag FV, and the BUOYANT FORCE FB. |
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| 45. |
9. A car moves in a straight line from rest at t=0. It accelerates with 2m/s22m/s2 Solve the following tableTime 2 sec ? ? 10 minDisplacement ? ? 25 m ?Velocity ? 10 m/s ? ? |
| Answer» EXPLANATION:HEY FRIENDS your ANSWER is here | |
| 46. |
A stone is thrown vertically upward and its velocity becomes half of its original in 15 sec. What is maximum height? |
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Answer» 4500 mExplanation:V = u +gtsince it is moving UPWARD G is -ve GIVEN v=u/2and t=15u/2=gtg=10u=300 m/smaximum height =u^2/2gsubstuting the values we get height =4500m |
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| 47. |
What is unit and measurement? class 11 |
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Answer» tion:A unit of measurement is a definite magnitude of a quantity, DEFINED and ADOPTED by convention or by law, that is used as a standard for measurement of the same kind of quantity. ... Measurement is a process of determining how large or small a physical quantity is as COMPARED to a BASIC REFERENCE quantity of the same kind. |
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| 48. |
A body of Mass 1 kg drops from the top of tower of height50m what will be it's K.E below 10m the top |
| Answer» 100 joulesExplanation:ke=mgh=1*10*10=100 | |
| 49. |
Two capacitors of capacitance 1F and 0.01F are charged to the same potential. Which will give more intense electric shock if touched more electric shock? |
| Answer» C shock by 1F capacitor will be more.ELECTRIC shock refers to DISCHARGE of current or high speed electrons into the body. Capacitance of a conductor is represented by the formula - Q = CV. In the formula, Q is charge, C is capacitance and V is voltage. Assuming voltage to be constant, the AMOUNT of charge discharged or flowed will be directly proportional to the amount of capacitance. Since, capacitance of 1F is numerically GREATER than 0.01 F, electric shock will be more severe from the first one. | |
| 50. |
8. Two engines cross each other in opposite direction. One engine is whistling a frequencyof 540. People seating in another engine willhear whistle of which frequencies when theyare approaching the first engine and whenhave crossed the first engine. Both enginesare moving with a velocity of 40 meter persecond. Velocity of sound is 340 meter/second |
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Answer» When the stone is RELEASED from elevator, the stone continues to move UPWARDS due to inertia and thus SPEED of the stone just after it is released is U (upwards). Acceleration due to gravity g ACTS in the downward direction.When the stone is released from elevator, the stone continues to move upwards due to inertia and thus speed of the stone just after it is released is u (upwards). Acceleration due to gravity g acts in the downward direction.Explanation: |
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