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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 14251. |
TOPIC: Projectile on inclined planeWhat is the value of R(max) by putting the value of α ? |
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Answer» TOPIC: Projectile on inclined plane What is the value of R(max) by putting the value of α ? |
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| 14252. |
A particle moves in a circle of radius 10 cm with a constant speed and time period of 0.2π s. The acceleration of the particle is |
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Answer» A particle moves in a circle of radius 10 cm with a constant speed and time period of 0.2π s. The acceleration of the particle is |
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| 14253. |
Two charges of q & 6q are placed at some distance, force acting on q is →F, then force on 6q is |
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Answer» Two charges of q & 6q are placed at some distance, force acting on q is →F, then force on 6q is |
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| 14254. |
At a depth of 1000 m in an ocean, what is the gauge pressure, when density of sea water is given as 1.03×103 kg/m3? (Take g=10 m/s2) |
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Answer» At a depth of 1000 m in an ocean, what is the gauge pressure, when density of sea water is given as 1.03×103 kg/m3? (Take g=10 m/s2) |
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| 14255. |
An object is droped from the rest .if falls distance x during first second and additional distan y next two second. Then ratio of x/y is |
| Answer» An object is droped from the rest .if falls distance x during first second and additional distan y next two second. Then ratio of x/y is | |
| 14256. |
A series LCR circuit is connected across an AC supply of frequency f. The resonant frequency of the circuit is fr. The current will lag behind the voltage when - |
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Answer» A series LCR circuit is connected across an AC supply of frequency f. The resonant frequency of the circuit is fr. The current will lag behind the voltage when - |
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| 14257. |
How makes to change the direction of AC |
| Answer» How makes to change the direction of AC | |
| 14258. |
Figure show that particle A is projected from point P with velocity u along the plane and simultaneously anotherparticle B with velocity v at an angle a with vertical. The particle collide at point Q on the plane. Then what is the relation between v and u |
| Answer» Figure show that particle A is projected from point P with velocity u along the plane and simultaneously anotherparticle B with velocity v at an angle a with vertical. The particle collide at point Q on the plane. Then what is the relation between v and u | |
| 14259. |
A particle is displaced from (1,2) m to (0,0) m along the path y=2x3. Work done by a force →F=(x3^j+y^i) N acting on the particle, during this displacement is (in J)[Give your answer without considering sign] |
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Answer» A particle is displaced from (1,2) m to (0,0) m along the path y=2x3. Work done by a force →F=(x3^j+y^i) N acting on the particle, during this displacement is (in J) [Give your answer without considering sign] |
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| 14260. |
A capillary tube kept vertically in liquid 3 cm of tube inside liquid and 5 cm of liquid column in capillary outside the liquid. The end of capillary inside the liquid is closed and taken outside the liquid. Now closed end is opened.Then the total length of liquid in capillary when it is outside liquid a.10 cm b.5 cm c.8 cm d.0 |
| Answer» A capillary tube kept vertically in liquid 3 cm of tube inside liquid and 5 cm of liquid column in capillary outside the liquid. The end of capillary inside the liquid is closed and taken outside the liquid. Now closed end is opened.Then the total length of liquid in capillary when it is outside liquid a.10 cm b.5 cm c.8 cm d.0 | |
| 14261. |
If somehow the dis†an ce between sun and the Earth is doubled , the gravitational force between them will become a) 2 times b) 1/2 times c)4times d)1/4 time |
| Answer» If somehow the dis†an ce between sun and the Earth is doubled , the gravitational force between them will become a) 2 times b) 1/2 times c)4times d)1/4 time | |
| 14262. |
Write any three examples of whistling sound you have heard. |
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Answer» Write any three examples of whistling sound you have heard. |
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| 14263. |
A wheel of mass 10 kg and radius 20 cm is rotating at an angular speed of 100 rev/min when the motor is turned off. Neglecting the friction at the axle, calculate the force that must be applied tangentially to the wheel to bring it to rest in 10 revolutions. |
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Answer» A wheel of mass 10 kg and radius 20 cm is rotating at an angular speed of 100 rev/min when the motor is turned off. Neglecting the friction at the axle, calculate the force that must be applied tangentially to the wheel to bring it to rest in 10 revolutions. |
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| 14264. |
In a region of space the eletric field is in x-direction is E=E^° x(i). Consider an imaginary cubicle volume of edge 'a' with its edges parallel to the axis of co-ordinates.The charge inside this volume will be? a)zero b)ε^° E^° a³ c)1/ε^° E^° a³ d)1/6 ε^° E^° a³ |
| Answer» In a region of space the eletric field is in x-direction is E=E^° x(i). Consider an imaginary cubicle volume of edge 'a' with its edges parallel to the axis of co-ordinates.The charge inside this volume will be? a)zero b)ε^° E^° a³ c)1/ε^° E^° a³ d)1/6 ε^° E^° a³ | |
| 14265. |
A symmetrical two-hinged parabolic arch rib has a span of 48 m between the abutment pins at the same level and a central rise of 10 m. Moment of inertia at any section follows the law I=I0secθ. If a load of 80 kN crosses the span then maximum horizontal thrust at the hinges will be ______ kN.131.25 |
Answer» A symmetrical two-hinged parabolic arch rib has a span of 48 m between the abutment pins at the same level and a central rise of 10 m. Moment of inertia at any section follows the law I=I0secθ. If a load of 80 kN crosses the span then maximum horizontal thrust at the hinges will be ______ kN.
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| 14266. |
Water is kept in a beaker of radius 5.0 cm. Consider a diameter of the beaker on the surface of the water. Find the force by which the surface on one side of the diameter pulls the surface on the other side. Surface tension of water = 0.075 N m-1. |
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Answer» Water is kept in a beaker of radius 5.0 cm. Consider a diameter of the beaker on the surface of the water. Find the force by which the surface on one side of the diameter pulls the surface on the other side. Surface tension of water = 0.075 N m-1. |
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| 14267. |
Give that x = anbmpr . The percentage errors in measurement of a,b and p are 1%0.5% and 0.75% respectively. If n = 2, m = 2 and r = 4 then percentage error in measurement of x is |
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Answer» Give that x = anbmpr . The percentage errors in measurement of a,b and p are 1%0.5% and 0.75% respectively. If n = 2, m = 2 and r = 4 then percentage error in measurement of x is |
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| 14268. |
The voltage time (V−t) graph for a triangular wave having peak value V0 is shown in the figure. The rms value of V in the time interval t=0 to t=T4 is, |
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Answer» The voltage time (V−t) graph for a triangular wave having peak value V0 is shown in the figure. The rms value of V in the time interval t=0 to t=T4 is, |
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| 14269. |
In the system shown in figure, the acceleration of 1kg mass is |
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Answer» In the system shown in figure, the acceleration of 1kg mass is
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| 14270. |
Derive an expression for de Broglie wavelength associated with an electron accelerated through a potential v. |
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Answer» Derive an expression for de Broglie wavelength associated with an electron accelerated through a potential v. |
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| 14271. |
A particle is moving in a circle of radius r having centre O, with constant speed v. What is the change in velocity in moving from A to B? (∠AOB=40∘) |
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Answer» A particle is moving in a circle of radius r having centre O, with constant speed v. What is the change in velocity in moving from A to B? (∠AOB=40∘)
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| 14272. |
62. A particle is moving southward with a velocity of 2m/s. In 4second, the velocity changes to 22m/s in south west direction. The average acceleration is. 1)1/2. Eastward. 2)1/2westward. 3)2 westward. 4)1/2. Westward |
| Answer» 62. A particle is moving southward with a velocity of 2m/s. In 4second, the velocity changes to 22m/s in south west direction. The average acceleration is. 1)1/2. Eastward. 2)1/2westward. 3)2 westward. 4)1/2. Westward | |
| 14273. |
Classically, an electron can be in any orbit around the nucleus of an atom. Then what determines the typical atomic size? Why is an atom not, say, thousand times bigger than its typical size? The question had greatly puzzled Bohr before he arrived at his famous model of the atom that you have learnt in the text. To simulate what he might well have done before his discovery, let us play as follows with the basic constants of nature and see if we can get a quantity with the dimensions of length that is roughly equal to the known size of an atom (~ 10–10m). (a) Construct a quantity with the dimensions of length from the fundamental constants e, me , and c. Determine its numerical value. (b) You will find that the length obtained in (a) is many orders of magnitude smaller than the atomic dimensions. Further, it involves c. But energies of atoms are mostly in non-relativistic domain where c is not expected to play any role. This is what may have suggested Bohr to discard c and look for ‘something else’ to get the right atomic size. Now, the Planck’s constant h had already made its appearance elsewhere. Bohr’s great insight lay in recognising that h, me , and e will yield the right atomic size. Construct a quantity with the dimension of length from h, me, and e and confirm that its numerical value has indeed the correct order of magnitude. |
| Answer» Classically, an electron can be in any orbit around the nucleus of an atom. Then what determines the typical atomic size? Why is an atom not, say, thousand times bigger than its typical size? The question had greatly puzzled Bohr before he arrived at his famous model of the atom that you have learnt in the text. To simulate what he might well have done before his discovery, let us play as follows with the basic constants of nature and see if we can get a quantity with the dimensions of length that is roughly equal to the known size of an atom (~ 10–10m). (a) Construct a quantity with the dimensions of length from the fundamental constants e, me , and c. Determine its numerical value. (b) You will find that the length obtained in (a) is many orders of magnitude smaller than the atomic dimensions. Further, it involves c. But energies of atoms are mostly in non-relativistic domain where c is not expected to play any role. This is what may have suggested Bohr to discard c and look for ‘something else’ to get the right atomic size. Now, the Planck’s constant h had already made its appearance elsewhere. Bohr’s great insight lay in recognising that h, me , and e will yield the right atomic size. Construct a quantity with the dimension of length from h, me, and e and confirm that its numerical value has indeed the correct order of magnitude. | |
| 14274. |
42.3 bulbs each having power P are connected in series in electric circuit. In another circuit another set of 3 bulbs of the same power are connected in parallel to same source. A) will bulb in both circuits glow with same brightness ? Justify the statement. B) let one bulb in each circuit get fused. Will the rest of the bulb continue to glow? Give the reason? C) represent the bulb by resistor. Draw a circuit diagram for each. |
| Answer» 42.3 bulbs each having power P are connected in series in electric circuit. In another circuit another set of 3 bulbs of the same power are connected in parallel to same source. A) will bulb in both circuits glow with same brightness ? Justify the statement. B) let one bulb in each circuit get fused. Will the rest of the bulb continue to glow? Give the reason? C) represent the bulb by resistor. Draw a circuit diagram for each. | |
| 14275. |
A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, what is the magnitude and direction of acceleration of the stone ? |
| Answer» A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, what is the magnitude and direction of acceleration of the stone ? | |
| 14276. |
Charged particle moves along a circle under possible constant electric and magnetic fields. What is possible? |
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Answer» Charged particle moves along a circle under possible constant electric and magnetic fields. What is possible? |
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| 14277. |
A material core has 10 turns per cm of the wire wound uniformly upon it , which carries a current of 2.0 A. The flux density in the material is 1.0 Wb/m2. The relative permeability of the core is: |
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Answer» A material core has 10 turns per cm of the wire wound uniformly upon it , which carries a current of 2.0 A. The flux density in the material is 1.0 Wb/m2. The relative permeability of the core is: |
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| 14278. |
A slab is subjected to two forces −→F1 and −→F2 of same magnitude F as shown in the figure. Force −→F2 is in XY−plane while force −→F1 acts along z−axis at the point (2^i+3^j). The moment of these forces about point O will be: |
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Answer» A slab is subjected to two forces −→F1 and −→F2 of same magnitude F as shown in the figure. Force −→F2 is in XY−plane while force −→F1 acts along z−axis at the point (2^i+3^j). The moment of these forces about point O will be: |
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| 14279. |
In a certain oscillatory system, the amplitude ofmotion is 5 m and the time period is 4 s. The timetaken by the particle for passing between pointswhich are at distances of 4 m and 2 m from thecentre and on the same side of it will be(d) 0.35 s(a) 0.30 s (b) 0.32 s (c) 0.33 s |
| Answer» In a certain oscillatory system, the amplitude ofmotion is 5 m and the time period is 4 s. The timetaken by the particle for passing between pointswhich are at distances of 4 m and 2 m from thecentre and on the same side of it will be(d) 0.35 s(a) 0.30 s (b) 0.32 s (c) 0.33 s | |
| 14280. |
if two bulbs 60W 250V and 120W 250V are connected in parallel across a 400V then bulb will be fused? |
| Answer» if two bulbs 60W 250V and 120W 250V are connected in parallel across a 400V then bulb will be fused? | |
| 14281. |
A flat car is given an acceleration ao=2 m/s2 starting from rest. A cable is connected to a crate A of mass 50 kg as shown in figure. Neglect friction between the floor and the car wheels and also the mass of the pulley. Calculate corresponding tension in the cable if μ=0.3 between the crate and the floor of the car, considering equilibrium of crate.(Assume friction is at its maximum value) |
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Answer» A flat car is given an acceleration ao=2 m/s2 starting from rest. A cable is connected to a crate A of mass 50 kg as shown in figure. Neglect friction between the floor and the car wheels and also the mass of the pulley. Calculate corresponding tension in the cable if μ=0.3 between the crate and the floor of the car, considering equilibrium of crate. |
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| 14282. |
The work function of aluminium is 4.2 eV. If two photons, each of energy 3.5 eVstrike an electron of aluminium, then emission of electrons will be |
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Answer» The work function of aluminium is 4.2 eV. If two photons, each of energy 3.5 eVstrike an electron of aluminium, then emission of electrons will be |
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| 14283. |
The state of a gas can be described by quoting the relationship between (a) pressure, volume, temperature (b) temperature, amount, pressure (c) amount, volume, temperature (d) pressure, volume, temperature, amount |
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Answer» The state of a gas can be described by quoting the relationship between |
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| 14284. |
A body of mass 2 kg is projected with a speed 4 m/s at an angle 45∘ to the horizontal. What will be its angular momentum about the point of projection when the body is at the highest point in its trajectory? |
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Answer» A body of mass 2 kg is projected with a speed 4 m/s at an angle 45∘ to the horizontal. What will be its angular momentum about the point of projection when the body is at the highest point in its trajectory? |
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| 14285. |
A Cylinder is floating in two liquids as shown figure choose the correct options(a) Net force on cylinder by liquid 1 is zero(b) Net force on cylinder by liquid 1 is non-zero(c) Net force on cylinder by liquid 2 is equal to the upthrust(d) Net force on cylinder by liquid 2 is more than the upthrust |
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Answer» A Cylinder is floating in two liquids as shown figure choose the correct options (a) Net force on cylinder by liquid 1 is zero (b) Net force on cylinder by liquid 1 is non-zero (c) Net force on cylinder by liquid 2 is equal to the upthrust (d) Net force on cylinder by liquid 2 is more than the upthrust
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| 14286. |
A small magnet is moving with constant velocity along the axis of a coil, as shown in the figure. Then correct graph between induced emf e and time t is |
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Answer» A small magnet is moving with constant velocity along the axis of a coil, as shown in the figure. Then correct graph between induced emf e and time t is |
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| 14287. |
A wheel is making revolutions about its axis with uniform angular acceleration. Starting from rest, it reaches 100 rev/sec in 4 secs. Its angular acceleration is. |
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Answer» A wheel is making revolutions about its axis with uniform angular acceleration. Starting from rest, it reaches 100 rev/sec in 4 secs. Its angular acceleration is |
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| 14288. |
A particle is projected with velocity vo along x−axis. A damping force is acting on the particle which is proportional to the square of the distance from the origin,i.e. ma=−αx2. The distance at which the particle stops : |
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Answer» A particle is projected with velocity vo along x−axis. A damping force is acting on the particle which is proportional to the square of the distance from the origin,i.e. ma=−αx2. The distance at which the particle stops : |
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| 14289. |
In which group does solids having conductivities in range 10^-6 to 10^-10 lie |
| Answer» In which group does solids having conductivities in range 10^-6 to 10^-10 lie | |
| 14290. |
An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in kJ is: |
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Answer» An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in kJ is: |
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| 14291. |
what will be the molar conductance, if resistivity is 'x' for 0.1 N H2SO4 solution? |
| Answer» what will be the molar conductance, if resistivity is 'x' for 0.1 N H2SO4 solution? | |
| 14292. |
In the figure shown, the magnitude of magnetic force on the wire ABC in the given uniform magnetic field will be:(B=2 Tesla) |
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Answer» In the figure shown, the magnitude of magnetic force on the wire ABC in the given uniform magnetic field will be: |
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| 14293. |
an object of height 4 cm is placed in front of a convex mirror of focal length 10cm at a distance of 20 cm from its principal focus find the position of image |
| Answer» an object of height 4 cm is placed in front of a convex mirror of focal length 10cm at a distance of 20 cm from its principal focus find the position of image | |
| 14294. |
12. If speed and density of a liquid coming out of acylindrical pipe is increased to three times, then theforce required to hold the pipe becomes(1) 3 times(2) 9 times227 times(4) 6 times |
| Answer» 12. If speed and density of a liquid coming out of acylindrical pipe is increased to three times, then theforce required to hold the pipe becomes(1) 3 times(2) 9 times227 times(4) 6 times | |
| 14295. |
What is meant by electrical resistance of a conductor? State how resistance of a conductor is affected when a) a low current passes through it for a short duration; b) a heavy current passes through it for about 30 seconds. |
| Answer» What is meant by electrical resistance of a conductor? State how resistance of a conductor is affected when a) a low current passes through it for a short duration; b) a heavy current passes through it for about 30 seconds. | |
| 14296. |
Who among the following is the pair of the stars having the same age? |
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Answer» Who among the following is the pair of the stars having the same age? |
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| 14297. |
A block of mass m rests on a rough horizontal surface with a rope tied to it. The co-efficient of friction between the surface and the block is μ. A monkey of the same mass climbs at the free end of the rope. The maximum acceleration with which the monkey can climb without moving the block is |
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Answer» A block of mass m rests on a rough horizontal surface with a rope tied to it. The co-efficient of friction between the surface and the block is μ. A monkey of the same mass climbs at the free end of the rope. The maximum acceleration with which the monkey can climb without moving the block is |
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| 14298. |
For given combination of capacitor where each capacitance is CEquivalent capacitance of the system is |
Answer»  For given combination of capacitor where each capacitance is C Equivalent capacitance of the system is |
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| 14299. |
A circular platform is mounted on a frictionless vertical axle. Its radius R = 2 m and its moment of inertia about the axle is 200 kg m2. It is initially at rest. A 50 kg man stands on the edge of the platform and begins to walk along the edge at the speed of 1 ms1 relative to the ground. Time taken by the man to complete one revolution is |
| Answer» A circular platform is mounted on a frictionless vertical axle. Its radius R = 2 m and its moment of inertia about the axle is 200 kg m2. It is initially at rest. A 50 kg man stands on the edge of the platform and begins to walk along the edge at the speed of 1 ms1 relative to the ground. Time taken by the man to complete one revolution is | |
| 14300. |
Why do the electrostatic field lines not form closed loops? |
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Answer» Why do the electrostatic field lines not form closed loops? |
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