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InterviewSolution
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.
| 6351. |
A block of mass m is placed on an inclined plane which is moving with constant velocity v in horizontal direction as shown in figure. Then find out work done in ground frame by the friction in time t, if the block is at rest with respect to the inclined plane. |
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Answer» A block of mass m is placed on an inclined plane which is moving with constant velocity v in horizontal direction as shown in figure. Then find out work done in ground frame by the friction in time t, if the block is at rest with respect to the inclined plane. |
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| 6352. |
A particle executes SHM with A=3cm .When particle is at 2 cm from mean position ,the magnitude of its velocity is equal to that of its acceleration . Then its time period in seconds is__________.(1)√5/π(2)√5/2π(3)4π/√5(4)2π/√3 |
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Answer» A particle executes SHM with A=3cm .When particle is at 2 cm from mean position ,the magnitude of its velocity is equal to that of its acceleration . Then its time period in seconds is__________. (1)√5/π (2)√5/2π (3)4π/√5 (4)2π/√3 |
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| 6353. |
What is the net force if two equal forces are acting in opposite directions on an object? [1MARK] |
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Answer» What is the net force if two equal forces are acting in opposite directions on an object? [1MARK] |
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| 6354. |
Answer the following questions: (a) Why does a paramagnetic sample display greater magnetisation (for the same magnetising field) when cooled? (b) Why is diamagnetism, in contrast, almost independent of temperature? (c) If a toroid uses bismuth for its core, will the field in the core be (slightly) greater or (slightly) less than when the core is empty? (d) Is the permeability of a ferromagnetic material independent of the magnetic field? If not, is it more for lower or higher fields? (e) Magnetic field lines are always nearly normal to the surface of a ferromagnet at every point. (This fact is analogous to the static electric field lines being normal to the surface of a conductor at every point.) Why? (f ) Would the maximum possible magnetisation of a paramagnetic sample be of the same order of magnitude as the magnetization of a ferromagnet? |
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Answer» Answer the
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| 6355. |
If a car covers 2/5th of the total distance with v1 speed and 3/5th of the total distance with v2 speed then what will be the average speed of the car? |
| Answer» If a car covers 2/5th of the total distance with v1 speed and 3/5th of the total distance with v2 speed then what will be the average speed of the car? | |
| 6356. |
Two balls fastened to light string of same length l and of different masses m & 2m. The other end of the strings are fixed at O. If both the masses collide with same speed (just before collision). Find the ratio of heights raised by the balls.[Consider, collision is elastic.] |
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Answer» Two balls fastened to light string of same length l and of different masses m & 2m. The other end of the strings are fixed at O. If both the masses collide with same speed (just before collision). Find the ratio of heights raised by the balls. |
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| 6357. |
two plane mirrors are inclined parallel to each other. A light ray is incident just at an angle of 30 degrees at point just inside with one end of A. The plane of incidence coincides just with the plane of the figure. How many reflections will occur inside the mirrors?(the length of mirror A= length of mirror B= 2 root3) |
| Answer» two plane mirrors are inclined parallel to each other. A light ray is incident just at an angle of 30 degrees at point just inside with one end of A. The plane of incidence coincides just with the plane of the figure. How many reflections will occur inside the mirrors?(the length of mirror A= length of mirror B= 2 root3) | |
| 6358. |
if current density in a conductor of radius 'a' varies as J=kr^2 where k is cons†an t . Find magnetic field induction at 1) ra |
| Answer» if current density in a conductor of radius 'a' varies as J=kr^2 where k is cons†an t . Find magnetic field induction at 1) ra | |
| 6359. |
A wave source produces 20 crests and 20 troughs in 0.2 seconds. Find the frequency of the wave. |
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Answer» A wave source produces 20 crests and 20 troughs in 0.2 seconds. Find the frequency of the wave. |
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| 6360. |
In the following network of wires, the value of current i is[0.77 Mark] |
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Answer» In the following network of wires, the value of current i is |
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| 6361. |
A spherical shell made of material of conductivity 109π (Ω−m)−1 has a thickness t=2 mm and radius of shell is R=10 cm. In an arrangement, it's inside surface is kept at a lower potential with respect to its outer surface. The resistance offered by the shell is equal to: |
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Answer» A spherical shell made of material of conductivity 109π (Ω−m)−1 has a thickness t=2 mm and radius of shell is R=10 cm. In an arrangement, it's inside surface is kept at a lower potential with respect to its outer surface. The resistance offered by the shell is equal to: |
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| 6362. |
Correct curve of potential (V) versus distance (r) from centre of two charged spherical shells is |
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Answer» Correct curve of potential (V) versus distance (r) from centre of two charged spherical shells is |
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| 6363. |
if an ideal gas expand isothermally from 50l to 100l against 2atm external pressure then value of W , delta U and Q respectively will be |
| Answer» if an ideal gas expand isothermally from 50l to 100l against 2atm external pressure then value of W , delta U and Q respectively will be | |
| 6364. |
A car moving at a speed of 36 kmph−1 is taking a turn on a circular road of radius 50 m. A small wooden plate is kept on the seat with its plane perpendicular to the radius of the circular road. A small block of mass 100 g is kept on the seat which rests against the plate. Coefficient between the block and the plate is 0.58. The plate is slowly turned so that the angle between the normal to the plate and the radius of the road is slowly increased. Find the angle at which the block will just start sliding on the plate. |
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Answer» A car moving at a speed of 36 kmph−1 is taking a turn on a circular road of radius 50 m. A small wooden plate is kept on the seat with its plane perpendicular to the radius of the circular road. A small block of mass 100 g is kept on the seat which rests against the plate. Coefficient between the block and the plate is 0.58. The plate is slowly turned so that the angle between the normal to the plate and the radius of the road is slowly increased. Find the angle at which the block will just start sliding on the plate. |
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| 6365. |
{ †ext { An electric dipole of length } 10 cm †ext { having charges } + 6 × 10 ^ { - 3 } C †ext { and } - 6 × 10 ^ { - 3 } C †ext { , placed at } } { 30 ^ { ° } †ext { with respect to a uniform electric field experiences a torque of magnitude } 6 \sqrt { 3 } Nm †ext { . } } { †ext { Calculate the magnitude of electric field. } |
| Answer» { †ext { An electric dipole of length } 10 cm †ext { having charges } + 6 × 10 ^ { - 3 } C †ext { and } - 6 × 10 ^ { - 3 } C †ext { , placed at } } { 30 ^ { ° } †ext { with respect to a uniform electric field experiences a torque of magnitude } 6 \sqrt { 3 } Nm †ext { . } } { †ext { Calculate the magnitude of electric field. } | |
| 6366. |
Find the c.m. of a uniform L− shaped lamina (a thin flat plate) with dimensions as shown in figure. The mass of lamina is 3 kgAnd report the sum of x and y coordinates. Answer upto 2 decimal places. |
Answer» Find the c.m. of a uniform L− shaped lamina (a thin flat plate) with dimensions as shown in figure. The mass of lamina is 3 kg And report the sum of x and y coordinates. Answer upto 2 decimal places. |
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| 6367. |
Given that, force varies with position(x) as F=1+2x+3x2+4x3+5x4, when x changes from 0 to 5 m, then work done by the force is |
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Answer» Given that, force varies with position(x) as F=1+2x+3x2+4x3+5x4, when x changes from 0 to 5 m, then work done by the force is |
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| 6368. |
Two equal point charge A and B are R distance apart . A point charge placed on perpendicular bisector at a distance d from the centre will experience maximum electrostatic force when d is ------------- |
| Answer» Two equal point charge A and B are R distance apart . A point charge placed on perpendicular bisector at a distance d from the centre will experience maximum electrostatic force when d is ------------- | |
| 6369. |
Displacement in nth second equation : snth = u + a(2n-1)/2 is dimensionally incorrect but physically correct right? |
| Answer» Displacement in nth second equation : snth = u + a(2n-1)/2 is dimensionally incorrect but physically correct right? | |
| 6370. |
A bulb is made using two filaments. A switch selects whether the filaments are used individually or in parallel. When used with a 15 V battery, the bulb can be operated at 5 W, 10 W or 15 W. What should be the resistances of the filaments ? |
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Answer» A bulb is made using two filaments. A switch selects whether the filaments are used individually or in parallel. When used with a 15 V battery, the bulb can be operated at 5 W, 10 W or 15 W. What should be the resistances of the filaments ? |
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| 6371. |
A uniform solid hemisphere of radius r is joined to a uniform solid right circular cone of base radius r. Both have same density. The centre of mass of the composite solid lies on the common face. The height (h) of the cone is |
| Answer» A uniform solid hemisphere of radius r is joined to a uniform solid right circular cone of base radius r. Both have same density. The centre of mass of the composite solid lies on the common face. The height (h) of the cone is | |
| 6372. |
A soft plastic bottle, filled with water of density 1 gm/cc, carries an inverted glass test-tube with some air (ideal gas) trapped as shown in the figure. The test-tube has a mass of 5 gm, and it is made of a thick glass of density 2.5 gm/cc. Initially, the bottle is sealed at atmospheric pressure p0=105 Pa so that the volume of the trapped air is v0=3.3 cc. When the bottle is squeezed from outside at constant temperature, the pressure inside rises and the volume of the trapped air reduces. It is found that the test tube begins to sink at pressure p0+Δp without changing its orientation. At this pressure, the volume of the trapped air is v0−Δv.Let Δv=X cc and Δp=Y×103 Pa.The value of X is |
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Answer» A soft plastic bottle, filled with water of density 1 gm/cc, carries an inverted glass test-tube with some air (ideal gas) trapped as shown in the figure. The test-tube has a mass of 5 gm, and it is made of a thick glass of density 2.5 gm/cc. Initially, the bottle is sealed at atmospheric pressure p0=105 Pa so that the volume of the trapped air is v0=3.3 cc. When the bottle is squeezed from outside at constant temperature, the pressure inside rises and the volume of the trapped air reduces. It is found that the test tube begins to sink at pressure p0+Δp without changing its orientation. At this pressure, the volume of the trapped air is v0−Δv. Let Δv=X cc and Δp=Y×103 Pa. The value of X is  |
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| 6373. |
In the given figure, two balloons are suspended freely by two light threads. Initially, they are at a distance of 10 cm. When we blow air in the space between the two balloons, the distance between them will be: |
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Answer» In the given figure, two balloons are suspended freely by two light threads. Initially, they are at a distance of 10 cm. When we blow air in the space between the two balloons, the distance between them will be:
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| 6374. |
A person looking at a person wearing a shirt with a pattern comprising vertical and horizontal lines is able to see the vertical lines more distinctly than the horizontal ones. What is this defect due to? How is such a defect of vision corrected? |
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Answer» A person
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| 6375. |
Find the dimension of the following in terms of mass , time , length and charge ? a) Magnetic flux b) Rigidity modulus c) Emf d) potential difference e) electric potential f) Dipole moment g) Electric flux h) Electric field i) electromotive force j)light year and wavelength k) gravitational potential l) curie m) frequency of a light wave n) Reynolds number o) coefficient of friction |
| Answer» Find the dimension of the following in terms of mass , time , length and charge ? a) Magnetic flux b) Rigidity modulus c) Emf d) potential difference e) electric potential f) Dipole moment g) Electric flux h) Electric field i) electromotive force j)light year and wavelength k) gravitational potential l) curie m) frequency of a light wave n) Reynolds number o) coefficient of friction | |
| 6376. |
A photon and electron both have wavelength 1A .The ratio of energy of photon to that of electron is |
| Answer» A photon and electron both have wavelength 1A .The ratio of energy of photon to that of electron is | |
| 6377. |
what is the force of attraction between hollow spherical shell of uniform density on a point mass inside ? |
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Answer» what is the force of attraction between hollow spherical shell of uniform density on a point mass inside ? |
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| 6378. |
A current of 4 A flows in a coil when connect to 12V d.c source .if the same coil is connected to a 12V ,50 rad/s a.c source ,a current of 2.4 A flows in the circuit . determine the induc†an ce of the coil |
| Answer» A current of 4 A flows in a coil when connect to 12V d.c source .if the same coil is connected to a 12V ,50 rad/s a.c source ,a current of 2.4 A flows in the circuit . determine the induc†an ce of the coil | |
| 6379. |
A cylinder of mass m=1 kg is suspended through two strings wrapped around it as shown in figure. Find the acceleration of COM of the cylinder. |
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Answer» A cylinder of mass m=1 kg is suspended through two strings wrapped around it as shown in figure. Find the acceleration of COM of the cylinder. |
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| 6380. |
What is the vapour pressure of 18 g of glucose in 178.2 g of water at 100? |
| Answer» What is the vapour pressure of 18 g of glucose in 178.2 g of water at 100? | |
| 6381. |
name the crystal system which can form 4 types of unit cells |
| Answer» name the crystal system which can form 4 types of unit cells | |
| 6382. |
A uniform disc of radius R=0.2 m kept over a rough horizontal surface is given a translational velocity V0 and angular velocity ω0. After some time, its kinetic energy become zero, then value of ω0 is:Given: V0=10 m/s. |
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Answer» A uniform disc of radius R=0.2 m kept over a rough horizontal surface is given a translational velocity V0 and angular velocity ω0. After some time, its kinetic energy become zero, then value of ω0 is: |
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| 6383. |
In uniform circular motion, the velocity vector and acceleration vector are |
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Answer» In uniform circular motion, the velocity vector and acceleration vector are |
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| 6384. |
a positive point charge q1 is placed at[a,0] and another positive point charge q2 is placed at [0,a] . find the force acting on q1 |
| Answer» a positive point charge q1 is placed at[a,0] and another positive point charge q2 is placed at [0,a] . find the force acting on q1 | |
| 6385. |
The coefficient of thermal conductivity of copper, mercury and glass are respectively KC,Km and Kg such that Kc>Km>Kg. If the same quantity of heat is to flow per second per unit area of each and corresponding temperature gradients are XC,Xm and Xg, then |
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Answer» The coefficient of thermal conductivity of copper, mercury and glass are respectively KC,Km and Kg such that Kc>Km>Kg. If the same quantity of heat is to flow per second per unit area of each and corresponding temperature gradients are XC,Xm and Xg, then |
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| 6386. |
A square loop of side 22 cm is changed to a circle in time 0.4 sec with its plane normal to a magnetic field 0.2 T. The emf induced is _______mV ( Only magnitude) |
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Answer» A square loop of side 22 cm is changed to a circle in time 0.4 sec with its plane normal to a magnetic field 0.2 T. The emf induced is |
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| 6387. |
Find the derivative of (x+cosx)(x−tanx). |
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Answer» Find the derivative of (x+cosx)(x−tanx). |
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| 6388. |
65.A solid cylinder is wrapped with a string on an inclined plane as shown in figure then the friction force acting between cylinder plane is |
| Answer» 65.A solid cylinder is wrapped with a string on an inclined plane as shown in figure then the friction force acting between cylinder plane is | |
| 6389. |
A capillary tube (A) is dipped in water. Another identical tube (B) is dipped in a soap-water solution. Which of the following shows the relative nature of the liquid columns in the two tubes? |
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Answer» A capillary tube (A) is dipped in water. Another identical tube (B) is dipped in a soap-water solution. Which of the following shows the relative nature of the liquid columns in the two tubes? |
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| 6390. |
In a Young’s double slit experiment, 12 fringes are observed to be formed in a certain segment of the screen when light of wave length 600 nm is used. If the wavelength of light is changed to 400 nm, the number of fringes observed in the same segment of the screen is given by |
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Answer» In a Young’s double slit experiment, 12 fringes are observed to be formed in a certain segment of the screen when light of wave length 600 nm is used. If the wavelength of light is changed to 400 nm, the number of fringes observed in the same segment of the screen is given by |
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| 6391. |
what is the maximum speed with which a car can move over a convex bridge |
| Answer» what is the maximum speed with which a car can move over a convex bridge | |
| 6392. |
An ornament for a courtyard at a word's fair is to be made up of four identical, frictionless metal spheres, each weighing 2√6 N . The spheres are to be arranged as shown, with three resting on a horizontal surface and touching each other; the fourth is to rest freely on the other three. The bottom three are kept from separating by spot welds at the points of contact with each other. Allowing for a factor of satety of 3, the tension the spot welds must withstand is |
Answer» An ornament for a courtyard at a word's fair is to be made up of four identical, frictionless metal spheres, each weighing 2√6 N . The spheres are to be arranged as shown, with three resting on a horizontal surface and touching each other; the fourth is to rest freely on the other three. The bottom three are kept from separating by spot welds at the points of contact with each other. Allowing for a factor of satety of 3, the tension the spot welds must withstand is  |
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| 6393. |
In YDSE experiment,the spacing between the slits is 'd' and wavelength of light used is 6000 Angstrom . If the angular width of a fringe formed on distant screen is 1 degree , then value of 'd' is : a) 1 mm. b) 0.05 mm. c) 0.03 mm. d) 0.01 mm. |
| Answer» In YDSE experiment,the spacing between the slits is 'd' and wavelength of light used is 6000 Angstrom . If the angular width of a fringe formed on distant screen is 1 degree , then value of 'd' is : a) 1 mm. b) 0.05 mm. c) 0.03 mm. d) 0.01 mm. | |
| 6394. |
Two identical satellites are at 7R and R away from earth surface, the wrong statement is (R = Radius of earth) |
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Answer» Two identical satellites are at 7R and R away from earth surface, the wrong statement is (R = Radius of earth) |
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| 6395. |
The work done on the boy walking on the rough ground due to friction is(1)Positive(2)Negative(3) Positive and negative alternatively(4) ZeroSPECIFY THE REASON ALSO |
| Answer» The work done on the boy walking on the rough ground due to friction is(1)Positive(2)Negative(3) Positive and negative alternatively(4) ZeroSPECIFY THE REASON ALSO | |
| 6396. |
A monochromatic of wavelength 500 nm is incident normally on a narrow slit of width 0.025 mm and a diffraction pattern is formed on a screen. Now, the whole apparatus is placed in a liquid of refractive index 1.25. The change in the angular width of the central maximum and change in the angular position of first diffraction minima, respectively, are |
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Answer» A monochromatic of wavelength 500 nm is incident normally on a narrow slit of width 0.025 mm and a diffraction pattern is formed on a screen. Now, the whole apparatus is placed in a liquid of refractive index 1.25. The change in the angular width of the central maximum and change in the angular position of first diffraction minima, respectively, are |
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| 6397. |
There is a planet which takes 1 years to complete one revolution, it has the distance of 1 AU from sun and there is a another planet at a distance of 4 AU from the sun. What will it's time period. |
| Answer» There is a planet which takes 1 years to complete one revolution, it has the distance of 1 AU from sun and there is a another planet at a distance of 4 AU from the sun. What will it's time period. | |
| 6398. |
The chemical behaviour of an atom depends upon |
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Answer» The chemical behaviour of an atom depends upon |
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| 6399. |
An object 1 cm high produces a real image 2 cm high when placed at a dis†an ce of 15 cm from a convex lens. Calculate the position of the image and the magnification and also find the focal length of the lens |
| Answer» An object 1 cm high produces a real image 2 cm high when placed at a dis†an ce of 15 cm from a convex lens. Calculate the position of the image and the magnification and also find the focal length of the lens | |
| 6400. |
I=\sqrt{\operatorname{cos}θ}dθ |
| Answer» I=\sqrt{\operatorname{cos}θ}dθ | |
