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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.
| 15701. |
A simply supported beam has an effective span of 20 m. The limiting ratio of span to effective depth as per IS 456: 2000 is . |
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Answer» A simply supported beam has an effective span of 20 m. The limiting ratio of span to effective depth as per IS 456: 2000 is |
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| 15702. |
a regular 'n' sided polygon is inscribed inside a circle of radius 'r'. (n-1) vertices have a fixed point charged '+q' . Find force experienced by a +q at circles centre A) the remaining vertex is emptyB) the remaining vertex has a point charge -q fixed on it. |
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Answer» a regular 'n' sided polygon is inscribed inside a circle of radius 'r'. (n-1) vertices have a fixed point charged '+q' . Find force experienced by a +q at circles centre A) the remaining vertex is empty B) the remaining vertex has a point charge -q fixed on it. |
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| 15703. |
Define specific resistance. What is its SI unit? |
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Answer» Define specific resistance. What is its SI unit? |
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| 15704. |
Two equal masses m are projected at the same angle from two points separated by their range withequal velocities.The momentum at the point of collision is ?? |
| Answer» Two equal masses m are projected at the same angle from two points separated by their range withequal velocities.The momentum at the point of collision is ?? | |
| 15705. |
The focal length of convex lens is 2.5 cm. Its magnifying power for minimum distance of distinct vision will be |
| Answer» The focal length of convex lens is 2.5 cm. Its magnifying power for minimum distance of distinct vision will be | |
| 15706. |
A ferry boat has internal volume 1 m3 and weight 50 kg. (a) Neglecting the thickness of the wood, find the fraction of the volume of the boat immersed in water. (b) If a leak develops in the bottom and water starts coming in, what fraction of the boat's volume will be filled with water before water starts coming in from the sides ? |
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Answer» A ferry boat has internal volume 1 m3 and weight 50 kg. (a) Neglecting the thickness of the wood, find the fraction of the volume of the boat immersed in water. (b) If a leak develops in the bottom and water starts coming in, what fraction of the boat's volume will be filled with water before water starts coming in from the sides ? |
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| 15707. |
What percentage of blocks in the figure have the unit digit as 0? |
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Answer» What percentage of blocks in the figure have the unit digit as 0? |
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| 15708. |
A cylindrical tube, open at both ends, has fundamental frequency n. If one of the ends is closed, the fundamental frequency will become |
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Answer» A cylindrical tube, open at both ends, has fundamental frequency n. If one of the ends is closed, the fundamental frequency will become |
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| 15709. |
A body of mass 2 kg suspended through a vertical spring executes simple harmonic motion of period 4 s. If the oscillations are stopped and the body hangs in equilibrium, find the potential energy stored in the spring. |
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Answer» A body of mass 2 kg suspended through a vertical spring executes simple harmonic motion of period 4 s. If the oscillations are stopped and the body hangs in equilibrium, find the potential energy stored in the spring. |
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| 15710. |
Find the current through the middle branch of the unbalanced Wheatstone's bridge circuit, as shown in figure. |
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Answer» Find the current through the middle branch of the unbalanced Wheatstone's bridge circuit, as shown in figure. |
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| 15711. |
Consider three charges q1, q2, q3 each equal to q at the vertices of an equilateral triangle of side l. What is the force on a charge Q (with the same sign as q) placed at the centroid of the triangle? |
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Answer» Consider three charges q1, q2, q3 each equal to q at the vertices of an equilateral triangle of side l. What is the force on a charge Q (with the same sign as q) placed at the centroid of the triangle? |
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| 15712. |
Two concentric circular coils X and Y of radii 16 cm and 10 cm,respectively, lie in the same vertical plane containing the north tosouth direction. Coil X has 20 turns and carries a current of 16 A;coil Y has 25 turns and carries a current of 18 A. The sense of thecurrent in X is anticlockwise, and clockwise in Y, for an observerlooking at the coils facing west. Give the magnitude and direction ofthe net magnetic field due to the coils at their centre |
| Answer» Two concentric circular coils X and Y of radii 16 cm and 10 cm,respectively, lie in the same vertical plane containing the north tosouth direction. Coil X has 20 turns and carries a current of 16 A;coil Y has 25 turns and carries a current of 18 A. The sense of thecurrent in X is anticlockwise, and clockwise in Y, for an observerlooking at the coils facing west. Give the magnitude and direction ofthe net magnetic field due to the coils at their centre | |
| 15713. |
Explain about conductivity in conductors, insulators, semiconductors(increase or decrease and why)when temperature and pressure changes? |
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Answer» Explain about conductivity in conductors, insulators, semiconductors(increase or decrease and why)when temperature and pressure changes? |
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| 15714. |
The equivalent conductances of Ba2+ and Cl- are 127 and 76 ohm-1 n ntcm- 1 eq-1 respectivelyat infinite dilution. The equivalent n ntconductance of BaC12 at infinite dilution will be: n nt1) 139.5 2) 101.5 3) 203 4) 279 |
| Answer» The equivalent conductances of Ba2+ and Cl- are 127 and 76 ohm-1 n ntcm- 1 eq-1 respectivelyat infinite dilution. The equivalent n ntconductance of BaC12 at infinite dilution will be: n nt1) 139.5 2) 101.5 3) 203 4) 279 | |
| 15715. |
A ball is thrown vertically upwards, it reaches the height h and then returns to the initial position. Work done by gravity when ball moves upwards is W1 and W2 when ball moves in downward direction. Then |
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Answer» A ball is thrown vertically upwards, it reaches the height h and then returns to the initial position. Work done by gravity when ball moves upwards is W1 and W2 when ball moves in downward direction. Then |
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| 15716. |
When an object is viewed using light of wavelength 6000 ˚A under a microscope, the resolving power of the microscope is 104. Find the resolving power of the microscope, when the same object is viewed using light of wavelength 4000 ˚A? |
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Answer» When an object is viewed using light of wavelength 6000 ˚A under a microscope, the resolving power of the microscope is 104. Find the resolving power of the microscope, when the same object is viewed using light of wavelength 4000 ˚A? |
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| 15717. |
Four particles each of mass 1 kg are placed at the four corners of a square ABCD with a side of length 2 m. What is the moment of inertia of the system about an axis passing through the mid-points of sides AB and CD? |
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Answer» Four particles each of mass 1 kg are placed at the four corners of a square ABCD with a side of length 2 m. What is the moment of inertia of the system about an axis passing through the mid-points of sides AB and CD? |
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| 15718. |
The current ‘i′ in an inductance coil varies with time ‘t′ according to the following graph Which one of the following plots shows the variations of voltage in the coil magnitude wise? (all vertical lines are not part of graphs) |
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Answer» The current ‘i′ in an inductance coil varies with time ‘t′ according to the following graph |
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| 15719. |
In the given diagram a 0.1 kg bullet moving with speed 20 m/s strikes the 1.9 kg mass resting on a smooth block and gets embedded in it. Find the kinetic energy of the mass with which it will strike the ground. |
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Answer» In the given diagram a 0.1 kg bullet moving with speed 20 m/s strikes the 1.9 kg mass resting on a smooth block and gets embedded in it. Find the kinetic energy of the mass with which it will strike the ground. |
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| 15720. |
A liquid stands at the same level in both the limbs of a U-tube when at rest. If area of cross-section of both the limbs are equal, the difference in heights h of the liquid in the two limbs of U-tube, when the system is given an acceleration a in horizontal direction as show, is |
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Answer» A liquid stands at the same level in both the limbs of a U-tube when at rest. If area of cross-section of both the |
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| 15721. |
a polariod making an angle 60^0 with electric vector then intensity reduced by a factor of a )1/4 b) 3/4 c)1/2 d)1/ |
| Answer» a polariod making an angle 60^0 with electric vector then intensity reduced by a factor of a )1/4 b) 3/4 c)1/2 d)1/ | |
| 15722. |
5. A body is projected which speed 20m/s at an angle of 37 degree of an horizontal calculate the height of projectile at t=1 sec? |
| Answer» 5. A body is projected which speed 20m/s at an angle of 37 degree of an horizontal calculate the height of projectile at t=1 sec? | |
| 15723. |
the two bulbs of volume 5 litre and 10 litre containing an ideal gas at 9 atm and 6 atm respectively are connected. What is the final pressure in the two bulbs if the temperature remains cons†an |
| Answer» the two bulbs of volume 5 litre and 10 litre containing an ideal gas at 9 atm and 6 atm respectively are connected. What is the final pressure in the two bulbs if the temperature remains cons†an | |
| 15724. |
A concave mirror of focal length f produces an image n times the size of the object. If the image is real, then the distance of the object from the mirror is : |
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Answer» A concave mirror of focal length f produces an image n times the size of the object. If the image is real, then the distance of the object from the mirror is : |
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| 15725. |
A piece of solid weighs 120 g in air and 80 g when completely immersed in water. The relative density of solid is |
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Answer» A piece of solid weighs 120 g in air and 80 g when completely immersed in water. The relative density of solid is |
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| 15726. |
what is the potential energy in stationary wave of particles at mean position and extreme position respectively |
| Answer» what is the potential energy in stationary wave of particles at mean position and extreme position respectively | |
| 15727. |
A particle is thrown up with velocity 20 m/s. Find the time when velocity is 10 m/s.[Take g=10 m/s2] |
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Answer» A particle is thrown up with velocity 20 m/s. Find the time when velocity is 10 m/s. |
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| 15728. |
If the kinetic energy of a body increases by 2% then momentum : |
| Answer» If the kinetic energy of a body increases by 2% then momentum : | |
| 15729. |
19.How many waves of sound having frequency 3400 Hz are required to cover distance of 1000 m? |
| Answer» 19.How many waves of sound having frequency 3400 Hz are required to cover distance of 1000 m? | |
| 15730. |
If the earth was to cease rotating about its own axis, the increase in the value of g in C.G.S. system at a place of latitude of 45∘ will be |
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Answer» If the earth was to cease rotating about its own axis, the increase in the value of g in C.G.S. system at a place of latitude of 45∘ will be |
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| 15731. |
The volume of one more of helium is 44.8L at? |
| Answer» The volume of one more of helium is 44.8L at? | |
| 15732. |
Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following : (a) What is the final pressure of the gas in A and B ? (b) What is the change in internal energy of the gas ? (c) What is the change in the temperature of the gas ? (d) Do the intermediate states of the system (before settling to the final equilibrium state) lie on its P-V-T surface ? |
| Answer» Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following : (a) What is the final pressure of the gas in A and B ? (b) What is the change in internal energy of the gas ? (c) What is the change in the temperature of the gas ? (d) Do the intermediate states of the system (before settling to the final equilibrium state) lie on its P-V-T surface ? | |
| 15733. |
Which of the following functions for y can never represent a travelling wave?(a) (x^2-vt)^2(b) log [x+vt/x0](c) e{- (x+vt/x0}^2(d) 1/x=vtoptions(1) Only a (2) b and c (3) c and d (4)only c |
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Answer» Which of the following functions for y can never represent a travelling wave? (a) (x^2-vt)^2 (b) log [x+vt/x0] (c) e{- (x+vt/x0}^2 (d) 1/x=vt options (1) Only a (2) b and c (3) c and d (4)only c |
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| 15734. |
A thin circular loop of radius R rotates about its vertical diameter with an angular frequency w. Show that a small bead on the wire loop remains at its lowermost point for ω ≤ √ (g / R) . What is the angle made by the radius vector joining the centre to the bead with the vertical downward direction for ω = √(2g / R )? Neglect friction. |
| Answer» A thin circular loop of radius R rotates about its vertical diameter with an angular frequency w. Show that a small bead on the wire loop remains at its lowermost point for ω ≤ √ (g / R) . What is the angle made by the radius vector joining the centre to the bead with the vertical downward direction for ω = √(2g / R )? Neglect friction. | |
| 15735. |
A particle starts with an initial velocity 2.5 m/s along the positive x− direction and it accelerates uniformly at the rate 0.50 m/s2. The distance travelled by the particle in first two seconds will be |
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Answer» A particle starts with an initial velocity 2.5 m/s along the positive x− direction and it accelerates uniformly at the rate 0.50 m/s2. The distance travelled by the particle in first two seconds will be |
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| 15736. |
A meter stick is pivoted about its centre. A piece of wax of mass 20 g travelling horizontally and perpendicular to it at 10 m/s strikes and adheres to one end of the stick so that the stick starts to rotate in a horizontal circle. Given the moment of inertia of the stick and wax about the pivot is 0.02 kg-m2, the initial angular velocity of the stick is (in rad/s) |
Answer» A meter stick is pivoted about its centre. A piece of wax of mass 20 g travelling horizontally and perpendicular to it at 10 m/s strikes and adheres to one end of the stick so that the stick starts to rotate in a horizontal circle. Given the moment of inertia of the stick and wax about the pivot is 0.02 kg-m2, the initial angular velocity of the stick is (in rad/s) 
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| 15737. |
A particle of mass m is projected at an angle of 60∘ with a velocity of 20 m/s relative to the ground from a plank of same mass m which is placed on smooth surface. Initially plank was at rest. The minimum length of the plank for which the ball fall on the plank itself is |
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Answer» A particle of mass m is projected at an angle of 60∘ with a velocity of 20 m/s relative to the ground from a plank of same mass m which is placed on smooth surface. Initially plank was at rest. The minimum length of the plank for which the ball fall on the plank itself is |
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| 15738. |
A source of sound emitting a note of frequency 200 Hz moves towards an observer with a velocity v equal to the velocity of sound. If the observer also moves away from the source with the same velocity v, the apparent frequency heard by the observer is |
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Answer» A source of sound emitting a note of frequency 200 Hz moves towards an observer with a velocity v equal to the velocity of sound. If the observer also moves away from the source with the same velocity v, the apparent frequency heard by the observer is |
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| 15739. |
four point masses are placed at the center of a square oc side 2 m as shown in figure . Find the center of mass of the system w.r.t. the center oc squar |
| Answer» four point masses are placed at the center of a square oc side 2 m as shown in figure . Find the center of mass of the system w.r.t. the center oc squar | |
| 15740. |
A monochromatic light is incident from air on a refracting surface of a prism of angle 75∘ and refractive index n0=√3. The other refracting surface of the prism is coated by a film of material of refractive index n as shown in figure. The ray of light suffers total internal reflection at the coated prism surface for an incidence angle of θ≤60∘. The value of 10 n2 is |
Answer» A monochromatic light is incident from air on a refracting surface of a prism of angle 75∘ and refractive index n0=√3. The other refracting surface of the prism is coated by a film of material of refractive index n as shown in figure. The ray of light suffers total internal reflection at the coated prism surface for an incidence angle of θ≤60∘. The value of 10 n2 is |
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| 15741. |
A rocket which is ejecting gas with a speed of 100 m/s and the rate of ejection of the gas from the rocket is 800 kg/s. If the mass of the rocket is 4000 kg, find out the initial acceleration of the rocket. Take (g=10 m/s2) |
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Answer» A rocket which is ejecting gas with a speed of 100 m/s and the rate of ejection of the gas from the rocket is 800 kg/s. If the mass of the rocket is 4000 kg, find out the initial acceleration of the rocket. Take (g=10 m/s2) |
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| 15742. |
two positive charges of 1 microcoulomb and 2 microcouomb are placed are placed 1 m apart. The value of electric field in N/C at the mid point of the charges will be |
| Answer» two positive charges of 1 microcoulomb and 2 microcouomb are placed are placed 1 m apart. The value of electric field in N/C at the mid point of the charges will be | |
| 15743. |
A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass = 5.98 1024 kg) have to be compresed to be a black hole? |
| Answer» A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass = 5.98 1024 kg) have to be compresed to be a black hole? | |
| 15744. |
a cylinder of mass 5 kg and radius 10 cm is moving in a horizontal suface with a speed of 5 m/s. and angular speed about CM is 10 rad/sec. the angular momentum of the cylinder at the point of contact |
| Answer» a cylinder of mass 5 kg and radius 10 cm is moving in a horizontal suface with a speed of 5 m/s. and angular speed about CM is 10 rad/sec. the angular momentum of the cylinder at the point of contact | |
| 15745. |
The average acceleration vector for a particle having a uniform circular motion is |
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Answer» The average acceleration vector for a particle having a uniform circular motion is |
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| 15746. |
Q:- A car of mass 2000 kg travelling with a uniform velocity of 2m/s accelerates till its velocity becomes 22m/s. The work done on the car is- 1. 480 kJ 2. 48 k |
| Answer» Q:- A car of mass 2000 kg travelling with a uniform velocity of 2m/s accelerates till its velocity becomes 22m/s. The work done on the car is- 1. 480 kJ 2. 48 k | |
| 15747. |
If the two mirrors are perpendicular inclined with each other and angle of deviation is 180 degrees why are the incident ray reflected ray antiparallel |
| Answer» If the two mirrors are perpendicular inclined with each other and angle of deviation is 180 degrees why are the incident ray reflected ray antiparallel | |
| 15748. |
39. A large solid sphere of diameter d attract a small particle(mass=m) which is at distance r from center of solid sphere. If central portion of the sphere of diameter d/2 be removed leaving behind a cavity, then the new force of attraction become____. |
| Answer» 39. A large solid sphere of diameter d attract a small particle(mass=m) which is at distance r from center of solid sphere. If central portion of the sphere of diameter d/2 be removed leaving behind a cavity, then the new force of attraction become____. | |
| 15749. |
A man standing on a railway platform noticed that a train took 21 seconds to cross the platform (this means the time elapsed from the moment the engine enters the platform till the last compartment leaves the platform) which is 88 meters long, and that it took 9 seconds to pass him. Assuming that the train was moving with uniform speed, what is the length of the train in metres? |
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Answer» A man standing on a railway platform noticed that a train took 21 seconds to cross the platform (this means the time elapsed from the moment the engine enters the platform till the last compartment leaves the platform) which is 88 meters long, and that it took 9 seconds to pass him. Assuming that the train was moving with uniform speed, what is the length of the train in metres? |
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| 15750. |
Two circular coils of radii 5 cm and 10 cm carry equal current of 1 amphere. The coils have 50 and 60 turn respectively and are placed in such a way that their planes as well as the centre coincides. Find the magnitude of magnetic field at common centre when the current in coils are in opposite sense. |
| Answer» Two circular coils of radii 5 cm and 10 cm carry equal current of 1 amphere. The coils have 50 and 60 turn respectively and are placed in such a way that their planes as well as the centre coincides. Find the magnitude of magnetic field at common centre when the current in coils are in opposite sense. | |
