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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 solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop after 2π revolutions is |
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Answer» A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop after 2π revolutions is |
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| 2. |
A particle projected from the level ground just cleared in its Ascent a wall 30 M high and 120√3 m away measured horizontally. the time Since projection to clear the wall is 2 second It will strike the ground in the same horizontal plane from the wall on the other side at a distance of 150√3 120√3 180√3 210√3 |
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Answer» A particle projected from the level ground just cleared in its Ascent a wall 30 M high and 120√3 m away measured horizontally. the time Since projection to clear the wall is 2 second It will strike the ground in the same horizontal plane from the wall on the other side at a distance of 150√3 120√3 180√3 210√3 |
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| 3. |
(i) Use Gauss's law to find the electric field due to a uniformly charged infinite plane sheet. What is the direction of field for positive and negative charge densities ? (ii) Find the ratio of the potential differences that must be applied across the parallel and series combination of two capacitors C1 and C2 with their capacitances in the ratio 1: 2 so that the energy stored in the two cases becomes the same. |
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Answer» (i) Use Gauss's law to find the electric field due to a uniformly charged infinite plane sheet. What is the direction of field for positive and negative charge densities ? (ii) Find the ratio of the potential differences that must be applied across the parallel and series combination of two capacitors C1 and C2 with their capacitances in the ratio 1: 2 so that the energy stored in the two cases becomes the same. |
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| 4. |
At steady state, ratio of energy stored in C1 & C2 |
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Answer» At steady state, ratio of energy stored in C1 & C2 |
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| 5. |
ntIn YDSE ,the intensity of light at a point on the screen (where the path difference= lembda) is K ,(lembda being wavelength of light used) .The intensity at a point where the path difference is lemda/4 will ben |
| Answer» ntIn YDSE ,the intensity of light at a point on the screen (where the path difference= lembda) is K ,(lembda being wavelength of light used) .The intensity at a point where the path difference is lemda/4 will ben | |
| 6. |
51.The ratio of current I in the circuit when K is just pressed and long pressed |
| Answer» 51.The ratio of current I in the circuit when K is just pressed and long pressed | |
| 7. |
6. During the discharge of lead storage battery, the density of H2SO4 fell from 1.294gm/L to 1.139gm/L. H2SO4 density 1.294gm/L is 39% by weight and that of density 1.139gm/L is 20% by weight. The battery holds 3.5 L of acid and volume practically remains unchanged. Calculate current passing through the solution in one hour. |
| Answer» 6. During the discharge of lead storage battery, the density of H2SO4 fell from 1.294gm/L to 1.139gm/L. H2SO4 density 1.294gm/L is 39% by weight and that of density 1.139gm/L is 20% by weight. The battery holds 3.5 L of acid and volume practically remains unchanged. Calculate current passing through the solution in one hour. | |
| 8. |
The percentage scrap in a sheet metal blanking operation of a continous strip of sheet metal as shown in the figure(correct to two decimal places) is53.25 |
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Answer» The percentage scrap in a sheet metal blanking operation of a continous strip of sheet metal as shown in the figure
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| 9. |
A man wearing a hat of extended length 12 cm is running in rain falling downwards with speed 10 m/s. The maximum speed with which man can run, so that rain drops do not fall on his face (the length of his face below the extended part of the hat is 16 cm will be : |
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Answer» A man wearing a hat of extended length 12 cm is running in rain falling downwards with speed 10 m/s. The maximum speed with which man can run, so that rain drops do not fall on his face (the length of his face below the extended part of the hat is 16 cm will be : |
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| 10. |
The maximum horizontal range of a projectile is 400 m. The maximum value of height attained by it will be |
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Answer» The maximum horizontal range of a projectile is 400 m. The maximum value of height attained by it will be |
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| 11. |
A capacitor C is charged by a battery of V volts . Then it is connected to an uncharged capacitor 2C as shown in figure. No match the following two columns. Column-1 Column-2 (a) After closing the switch energy stored in C.(p) 19CV2(b) After closing the switch energy stored in 2C.(q) 16CV2(c) After closing the switch loss of energy during redistribution of charge.(r) 118CV2(s) None of these |
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Answer» A capacitor C is charged by a battery of V volts . Then it is connected to an uncharged capacitor 2C as shown in figure. No match the following two columns.
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| 12. |
Two identical square rods of metal are welded end to end as shown in figure (i), 20 calories of heat flows through it in 4 minutes. If the rods are welded as shown in figure (ii), the same amount of heat will flow through the rods in |
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Answer» Two identical square rods of metal are welded end to end as shown in figure (i), 20 calories of heat flows through it in 4 minutes. If the rods are welded as shown in figure (ii), the same amount of heat will flow through the rods in
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| 13. |
A steel beam of breadth 120 mm and height 750 mm is loaded as shown in the figure. Assume Esteel=200 Gpa.The value of maximum deflection of the beam is |
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Answer» A steel beam of breadth 120 mm and height 750 mm is loaded as shown in the figure. Assume Esteel=200 Gpa. |
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| 14. |
Identical charges each of value q are placed at the four corners A, B, C and D of a square of side a. The magnitude of the force on the charge at any one corner of the square is |
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Answer» Identical charges each of value q are placed at the four corners A, B, C and D of a square of side a. The magnitude of the force on the charge at any one corner of the square is |
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| 15. |
8. Two metallic spheres are placed in a liquid of dielectric { constant a such that their centers are nearly 1 m apart. It is { given that radius of each sphere is 2cm and capacitance { of system of spheres is 10N farads. Find the value of {N . |
| Answer» 8. Two metallic spheres are placed in a liquid of dielectric { constant a such that their centers are nearly 1 m apart. It is { given that radius of each sphere is 2cm and capacitance { of system of spheres is 10N farads. Find the value of {N . | |
| 16. |
Define quantum numbers. Explain in brief how are different quantum numbers related to each other? |
| Answer» Define quantum numbers. Explain in brief how are different quantum numbers related to each other? | |
| 17. |
A particle is projected from a point at the foot of a fixed plane inclined at angle 45∘ to the horizontal, in the vertical plane containing the line of greatest slope through the point. If θ(>45∘) is the inclination to the horizontal of the initial direction of projection, for what values of tan θ will the particle strike the plane horizontally? |
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Answer» A particle is projected from a point at the foot of a fixed plane inclined at angle 45∘ to the horizontal, in the vertical plane containing the line of greatest slope through the point. If θ(>45∘) is the inclination to the horizontal of the initial direction of projection, for what values of tan θ will the particle strike the plane horizontally? |
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| 18. |
Two lamps, one rated 100 W at 220 V and the other 200 W at 220 V are connected in series and in parallel to an elctric main supply of 220 V. Find the current drawn in each case |
| Answer» Two lamps, one rated 100 W at 220 V and the other 200 W at 220 V are connected in series and in parallel to an elctric main supply of 220 V. Find the current drawn in each case | |
| 19. |
A sudden impulse J is applied on solid sphere in 2 cases. In case 1, J is imparted at top point and in case 2, J is imparted at center as shown in figure. Ratio of kinetic energy in case 1 : case 2 is |
Answer» A sudden impulse J is applied on solid sphere in 2 cases. In case 1, J is imparted at top point and in case 2, J is imparted at center as shown in figure. Ratio of kinetic energy in case 1 : case 2 is 
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| 20. |
Find the derivative of sin(x+a)cosx where a is a fixed non-zero constant. |
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Answer» Find the derivative of sin(x+a)cosx where a is a fixed non-zero constant. |
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| 21. |
Explain that a body can have zero average velocity but non zero average speed. |
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Answer» Explain that a body can have zero average velocity but non zero average speed. |
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| 22. |
127.What is the charge on capacitor C1 and C2? |
| Answer» 127.What is the charge on capacitor C1 and C2? | |
| 23. |
A 0.098 kg block slides down a frictionless track as shown (Assume no energy loss on the entire track) The time taken by the block to move from A to B is |
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Answer» A 0.098 kg block slides down a frictionless track as shown (Assume no energy loss on the entire track) |
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| 24. |
The stress-strain graphs for materials A and B are shown in Fig. 9.12. The graphs are drawn to the same scale. (a) Which of the materials has the greater Young’s modulus? (b) Which of the two is the stronger material? |
| Answer» The stress-strain graphs for materials A and B are shown in Fig. 9.12. The graphs are drawn to the same scale. (a) Which of the materials has the greater Young’s modulus? (b) Which of the two is the stronger material? | |
| 25. |
Vijay has to go to office from home. He travels the first half of the distance at speed of 30 km/hr. For the remaining distance he travels at 10 km/hr for half the time and at 20 km/hr for the rest. Find his average speed. |
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Answer» Vijay has to go to office from home. He travels the first half of the distance at speed of 30 km/hr. For the remaining distance he travels at 10 km/hr for half the time and at 20 km/hr for the rest. Find his average speed. |
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| 26. |
The initial volume of water is 2000 cm3. Determine the change in volume of the water when external pressure is changed from 105 Nm−2 to 106 Nm−2. [Take compressibility of water as 60×10−11 m2/N] |
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Answer» The initial volume of water is 2000 cm3. Determine the change in volume of the water when external pressure is changed from 105 Nm−2 to 106 Nm−2. |
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| 27. |
What is the flux through a cube of side a if a point charge of q is at one of its corner? |
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Answer» What is the flux through a cube of side a if a point charge of q is at one of its corner? |
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| 28. |
A resistance wire connected in the left gap of a meter bridge balances a 10 Ω resistance in the right gap at a point which divides the bridge wire in the ratio 3:2. If the length of the resistance wire is 1.5 m, then the length of 1 Ω of the resistance wire is: |
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Answer» A resistance wire connected in the left gap of a meter bridge balances a 10 Ω resistance in the right gap at a point which divides the bridge wire in the ratio 3:2. If the length of the resistance wire is 1.5 m, then the length of 1 Ω of the resistance wire is: |
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| 29. |
Under certain circumstances, a nucleus can decay by emitting aparticle more massive than an α-particle. Consider the followingdecay processes:223 209 1488 82 6 Ra Pb C 223 219 488 86 2 Ra Rn He → +Calculate the Q-values for these decays and determine that bothare energetically allowed. |
| Answer» Under certain circumstances, a nucleus can decay by emitting aparticle more massive than an α-particle. Consider the followingdecay processes:223 209 1488 82 6 Ra Pb C 223 219 488 86 2 Ra Rn He → +Calculate the Q-values for these decays and determine that bothare energetically allowed. | |
| 30. |
A 60 kg weight is dragged on a horizontal surface by a rope upto 2 m with constant speed. If the coefficient of friction is μ=0.5, the angle of rope with the surface is 60∘ and g=9.8 m/sec2, then work done by rope on the block is |
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Answer» A 60 kg weight is dragged on a horizontal surface by a rope upto 2 m with constant speed. If the coefficient of friction is μ=0.5, the angle of rope with the surface is 60∘ and g=9.8 m/sec2, then work done by rope on the block is |
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| 31. |
A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24Ω resistance, which may be used separately, in series, or in parallel. What are the currents in the three cases? |
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Answer» A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24Ω resistance, which may be used separately, in series, or in parallel. What are the currents in the three cases? |
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| 32. |
Find equivalent capacitance b/w a and b |
| Answer» Find equivalent capacitance b/w a and b | |
| 33. |
the electric field part of an emw in vacuum is given by E=6cos (1.2y +3.6 810^8 t) i cap , then find 1.direction of propagation2.expression for magnetic field part of the wave . HOW TO FIND DIRECTION OF MAGNETIC FIELD ? |
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Answer» the electric field part of an emw in vacuum is given by E=6cos (1.2y +3.6 810^8 t) i cap , then find 1.direction of propagation 2.expression for magnetic field part of the wave . HOW TO FIND DIRECTION OF MAGNETIC FIELD ? |
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| 34. |
A man is slipping on a frictionless inclined plane } and a bag falls down from the same height. Then }{ the velocity of both is related as }(V_B= velocity of }} bag and }V_m= velocity of man) Explai} (1) }V_B>V_m (2) }V_B |
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Answer» A man is slipping on a frictionless inclined plane } and a bag falls down from the same height. Then }{ the velocity of both is related as }(V_B= velocity of }} bag and }V_m= velocity of man) Explai} (1) }V_B>V_m (2) }V_B |
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| 35. |
A block of mass 1 kg is held against rough vertical wall be applying horizontal force of 40 N. If the coefficient of friction between block and wall is 0.5, then magnitude of friction force acting on the block, is |
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Answer» A block of mass 1 kg is held against rough vertical wall be applying horizontal force of 40 N. If the coefficient of friction between block and wall is 0.5, then magnitude of friction force acting on the block, is |
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| 36. |
Two point charges qA= 3 μC and qB= −3 μC are located 20 cm apart in vacuum.(a) What isthe electric field at the midpoint O of the line AB joining the twocharges?(b) If anegative test charge of magnitude 1.5 × 10−9C is placed at this point, what is the force experienced by the testcharge? |
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Answer»
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| 37. |
a uniform chain has mass M and lengthL it is placed on a frictionless table with length L_0 hanging over the edge the chain begaing to slide own then the speed v with which the end slides down the edge is given by a)\sqrt{g/L(L+l_0)} b)\sqrt[{}]{g/L(L-l_0)} c)\sqrt{g/L(L^2-l_0^2)} d)\sqrt{2g(L-l_0) |
| Answer» a uniform chain has mass M and lengthL it is placed on a frictionless table with length L_0 hanging over the edge the chain begaing to slide own then the speed v with which the end slides down the edge is given by a)\sqrt{g/L(L+l_0)} b)\sqrt[{}]{g/L(L-l_0)} c)\sqrt{g/L(L^2-l_0^2)} d)\sqrt{2g(L-l_0) | |
| 38. |
18. The quotient when1000has1000 power is divided by 200 has Power 200 |
| Answer» 18. The quotient when1000has1000 power is divided by 200 has Power 200 | |
| 39. |
A person takes T' second to move up a certain is†an ce on the stationary eecalator.while moving on a moving escalator,the person takes T"second to cover same dis†an ce the time taken to over the same dis†an ce if man just s†an ds on the moving escalator i |
| Answer» A person takes T' second to move up a certain is†an ce on the stationary eecalator.while moving on a moving escalator,the person takes T"second to cover same dis†an ce the time taken to over the same dis†an ce if man just s†an ds on the moving escalator i | |
| 40. |
The linear mass density of a thin rod AB of length L varies from A to B as λ(x)=λ0(1+xL), where x is the distance from A. If M is the mass of the rod then its moment of inertia about an axis passing through A and perpendicular to the rod is : |
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Answer» The linear mass density of a thin rod AB of length L varies from A to B as λ(x)=λ0(1+xL), where x is the distance from A. If M is the mass of the rod then its moment of inertia about an axis passing through A and perpendicular to the rod is : |
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| 41. |
_________ of a two particle system depends only on the seperation between the two particles. |
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Answer» _________ of a two particle system depends only on the seperation between the two particles. |
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| 42. |
In MKS system, Stefan's constant is denoted by σ. In CGS system multiplying factor of σ will be |
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Answer» In MKS system, Stefan's constant is denoted by σ. In CGS system multiplying factor of σ will be |
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| 43. |
A mass- spring system oscillates such that the mass moves on a rough surface having coefficient of friction μ. It is compressed by a dis†an ce a from its normal length and, on being released, it moves to a dis†an ce b from its equilibrium position. The decrease in amplitude for one half-cycle (-ato b) is |
| Answer» A mass- spring system oscillates such that the mass moves on a rough surface having coefficient of friction μ. It is compressed by a dis†an ce a from its normal length and, on being released, it moves to a dis†an ce b from its equilibrium position. The decrease in amplitude for one half-cycle (-ato b) is | |
| 44. |
Determine the currentin each branch of the network shown in fig 3.30: |
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Answer» Determine the current
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| 45. |
An elevator cable is to have a maximum stress of 7x10^7 N/m^2 to allow for appropriate safety factors. Its maximum upward acceleration is 1.5 m/s^2. If the cable has to support the total weight of 2000 kg of a loaded elevator, the area of cross-section of the cable should be |
| Answer» An elevator cable is to have a maximum stress of 7x10^7 N/m^2 to allow for appropriate safety factors. Its maximum upward acceleration is 1.5 m/s^2. If the cable has to support the total weight of 2000 kg of a loaded elevator, the area of cross-section of the cable should be | |
| 46. |
The position of the centre of mass of the T shaped plate from reference point O as shown in the figure will be: |
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Answer» The position of the centre of mass of the T shaped plate from reference point O as shown in the figure will be: |
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| 47. |
A fish in an aquarium approaches the wall at rate of 2.5 m/s , observes a fly approaching it at 8 m/s as shown in the figure. If the refractive index of water is 43, then actual velocity of fly is : |
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Answer» A fish in an aquarium approaches the wall at rate of 2.5 m/s , observes a fly approaching it at 8 m/s as shown in the figure. If the refractive index of water is 43, then actual velocity of fly is : |
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| 48. |
1) Find the value of T e^{-0.65/(2×10^{-5}×8.62× T)} = 2 × e^{-0.65/(2×8.62×10^{-5}×300 |
| Answer» 1) Find the value of T e^{-0.65/(2×10^{-5}×8.62× T)} = 2 × e^{-0.65/(2×8.62×10^{-5}×300 | |
| 49. |
A simple pendulum of length l having a bob of mass m is suspended in a car that is travelling with a constant speed v around a circular path of radius R. If the pendulum undergoes small oscillations about its equilibrium position, the frequency of its oscillation will be |
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Answer» A simple pendulum of length l having a bob of mass m is suspended in a car that is travelling with a constant speed v around a circular path of radius R. If the pendulum undergoes small oscillations about its equilibrium position, the frequency of its oscillation will be |
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| 50. |
nt8 identical spherical drops, each carrying 1nC are at a potencial 900V each. All of these drops combine together to form single large drop. Calculate the potential of this large drop.n nta.3600Vn ntb.3400Vn ntc.3200Vn ntd.4000n |
| Answer» nt8 identical spherical drops, each carrying 1nC are at a potencial 900V each. All of these drops combine together to form single large drop. Calculate the potential of this large drop.n nta.3600Vn ntb.3400Vn ntc.3200Vn ntd.4000n | |
The time taken by the block to move from A to B is
