50278 + Interview Questions in Physics

1.	orbital speed when less than vo than trajector
Answer» orbital speed when less than vo than trajector

Discussion

2.	The temperature of n moles of an ideal gas is increased from T to 4T through a process for which pressure where a is constant. The work done by gas is:
Answer» The temperature of n moles of an ideal gas is increased from T to 4T through a process for which pressure where a is constant. The work done by gas is:

Discussion

3.	A body of mass 5kg makes an elastic head on Collison with an object of unknown mass and moves in original direction after Collison with a velocity equal to 1/10th of the original velocity. Calculate the mass of second object
Answer» A body of mass 5kg makes an elastic head on Collison with an object of unknown mass and moves in original direction after Collison with a velocity equal to 1/10th of the original velocity. Calculate the mass of second object

Discussion

4.	25 tuning forks are arranged in decreasing order of frequency. Any two successive forks produce 3 beats/sec. If the frequency of the first tuning fork is the octave of last, then the frequency of 21st fork is
Answer» $25$ tuning forks are arranged in decreasing order of frequency. Any two successive forks produce $3$ beats/sec. If the frequency of the first tuning fork is the octave of last, then the frequency of $21^{s t}$ fork is

Discussion

5.	If the critical constants of a hypothetical gas are Vc=150 cm3 mol−1, PC=50 atm and TC = 300 K. Then the radius of the molecule is: [Take atm mol−1K−1]
Answer» If the critical constants of a hypothetical gas are $V_{c} = 150 c m^{3} m o l^{- 1}, P_{C} = 50$ atm and $T_{C}$ = 300 K. Then the radius of the molecule is: [Take atm $m o l^{- 1} K^{- 1}$ ]

Discussion

6.	It takes 20 s for a person A to climb up the stairs, while another person B does the same in 45 s and both having same mass. Finda) Ratio of works done by A and Bb) Ratio of powers expended by A and B
Answer» It takes 20 s for a person A to climb up the stairs, while another person B does the same in 45 s and both having same mass. Find a) Ratio of works done by A and B b) Ratio of powers expended by A and B

Discussion

7.	The correct image of the given analog clock in a plane mirror will be:
Answer» The correct image of the given analog clock in a plane mirror will be:

Discussion

8.	If de Broglie wavelength associated with an electron is 3×10−10 m, then the momentum of the electron will be -
Answer» If de Broglie wavelength associated with an electron is $3 \times 10^{- 10} m$ , then the momentum of the electron will be -

Discussion

9.	A particle is sticked to a disc at a distance r2 m from centre. Disc has initial angular velocity of ωo=6^j rad/s and constant angular acceleration of α=−^j rad/s2 as shown in figure. If radius of disc is 1 m, find the speed of particle after t=2 s.
Answer» A particle is sticked to a disc at a distance $\frac{r}{2} m$ from centre. Disc has initial angular velocity of $ω_{o} = 6^j rad/s$ and constant angular acceleration of $α = -^j {rad/s}^{2}$ as shown in figure. If radius of disc is $1 m$ , find the speed of particle after $t = 2 s$ .

Discussion

10.	Figure shows a long straight current carrying wire with current I1=0.5 A, and a thin strip of width b=10 cm and length l=1.5 m placed parallel to it with a current I2=2 A as shown. The distance between wire and strip is r=1 m. Find the magnetic force of interaction between current I1 and I2.
Answer» Figure shows a long straight current carrying wire with current $I_{1} = 0.5 A$ , and a thin strip of width $b = 10 cm$ and length $l = 1.5 m$ placed parallel to it with a current $I_{2} = 2 A$ as shown. The distance between wire and strip is $r = 1 m$ . Find the magnetic force of interaction between current $I_{1}$ and $I_{2}$ .

Discussion

11.	Is it possible form a closed surface in uniform electric field to have a non zero flux
Answer» Is it possible form a closed surface in uniform electric field to have a non zero flux

Discussion

12.	A body hangs from a spring balance supported from the roof of the elevator, the balance reads 50 N when the elevator has an upward acceleration of 2.5 m/s2. What is the true weight of the body? (Take g = 10 m/s2)
Answer» A body hangs from a spring balance supported from the roof of the elevator, the balance reads $50 N$ when the elevator has an upward acceleration of $2.5 {m/s}^{2}$ . What is the true weight of the body? $($ Take $g$ = $10 {m/s}^{2})$

Discussion

13.	a uniformly charged rod with linear charge density λ of length L is inserted into a hollow cubical structure of side L with cons†an t velocity and moves out from the opposite face. draw the graph between flux and time
Answer» a uniformly charged rod with linear charge density λ of length L is inserted into a hollow cubical structure of side L with cons†an t velocity and moves out from the opposite face. draw the graph between flux and time

Discussion

14.	If the sun is in the 60° with respect to ground and the length of shadow of tree who is coming in front of it is 150m then find the length of the tree ?
Answer» If the sun is in the 60° with respect to ground and the length of shadow of tree who is coming in front of it is 150m then find the length of the tree ?

Discussion

15.	Block A has a mass of 30 kg and block B a mass of 15 kg. The coefficients of friction between all surfaces of contact are μs=0.15 and μk=0.10. Knowing that θ=30∘ and that the magnitude of the force F applied to block A is 250 N, determine the accelaration of block A.[Take g=10 m/s2]
Answer» Block A has a mass of $30 kg$ and block B a mass of $15 kg$ . The coefficients of friction between all surfaces of contact are $μ_{s} = 0.15$ and $μ_{k} = 0.10$ . Knowing that $θ = 30^{\circ}$ and that the magnitude of the force $F$ applied to block A is $250 N$ , determine the accelaration of block A. [Take $g = 10 {m/s}^{2}$ ]

Discussion

16.	Determine the point of application of net force, when forces of 20 N & 30 N are acting on the rod as shown in figure.
Answer» Determine the point of application of net force, when forces of 20 N & 30 N are acting on the rod as shown in figure.

16.

Determine the point of application of net force, when forces of 20 N & 30 N are acting on the rod as shown in figure.

Answer»

Determine the point of application of net force, when forces of 20 N & 30 N are acting on the rod as shown in figure.

Discussion

17.	In Figure,identify the following vectors.(i) Coinitial (ii) Equal (iii) Collinearbut not equal
Answer» In Figure, identify the following vectors. (i) Coinitial (ii) Equal (iii) Collinear but not equal

17.

In Figure,identify the following vectors.(i) Coinitial (ii) Equal (iii) Collinearbut not equal

Answer»

In Figure,
identify the following vectors.

(i) Coinitial (ii) Equal (iii) Collinear
but not equal

Discussion

18.	A very long pi shaped railing made of a resistanceless conducting wire is kept fixed in a vertical plane. A uniform rod of mass m and resistance R is released from rest in horizontal position. The rod is always in contact with pi shaped railing at two points distant l apart. A uniform and constant magnetic field B exists in space normal to the plane of railing. inwards. Find the maximum work done by all the forces on the rod.
Answer» A very long pi shaped railing made of a resistanceless conducting wire is kept fixed in a vertical plane. A uniform rod of mass m and resistance R is released from rest in horizontal position. The rod is always in contact with pi shaped railing at two points distant l apart. A uniform and constant magnetic field B exists in space normal to the plane of railing. inwards. Find the maximum work done by all the forces on the rod.

Discussion

19.	A heater is designed to operate with a power of 1000 W in a 100 V supply line. It is connected in combination with a resistance of 10 Ω and a resistance R to a 100 V power supply as shown in figure. What will be the value of R , such that heater operates with a power of 62.5 W?
Answer» A heater is designed to operate with a power of $1000 W$ in a $100 V$ supply line. It is connected in combination with a resistance of $10 Ω$ and a resistance $R$ to a $100 V$ power supply as shown in figure. What will be the value of $R$ , such that heater operates with a power of $62.5 W$ ?

Discussion

20.	A wire carrying current I has the configuration shown in figure. What is the value of θ for the magnetic induction B to be zero at the centre of the circle
Answer» A wire carrying current $I$ has the configuration shown in figure. What is the value of $θ$ for the magnetic induction $B$ to be zero at the centre of the circle

Discussion

21.	ntcan cathode ray tubes be considered as a capacitor since it has two metal plates seperated be empty space and p.d. is applied across the two endsn
Answer» ntcan cathode ray tubes be considered as a capacitor since it has two metal plates seperated be empty space and p.d. is applied across the two endsn

Discussion

22.	What is Hamiltonian operator in Schrodinger wave equation?
Answer» What is Hamiltonian operator in Schrodinger wave equation?

Discussion

23.	27.The maximum time period period of any simple pendulum on the earth is
Answer» 27.The maximum time period period of any simple pendulum on the earth is

Discussion

24.	An electric charge +q moves with velocity →V=3^i+4^j+^k, in an electromagnetic field given by→E=3^i+^j+2^k & →B=^i+^j+3^k.The y−component of the force experienced by +q is :
Answer» An electric charge $+ q$ moves with velocity $\to V = 3^i + 4^j +^k$ , in an electromagnetic field given by $\to E = 3^i +^j + 2^k & \to B =^i +^j + 3^k$ . The $y -$ component of the force experienced by $+ q$ is :

Discussion

25.	104.Two particles are located on a horizontal plane at a distance of 60 m .Both the particles are simultaneously projected at angle 45^° towards each other in the same vertical plane with velocities 2m/s and 14m/s .What is the minimum separation between the particles? (1) 60 m. (2) 30 m. (3) 16 m. (4) 36 m.
Answer» 104.Two particles are located on a horizontal plane at a distance of 60 m .Both the particles are simultaneously projected at angle 45^° towards each other in the same vertical plane with velocities 2m/s and 14m/s .What is the minimum separation between the particles? (1) 60 m. (2) 30 m. (3) 16 m. (4) 36 m.

Discussion

26.	Diagram shows an open tube which contains some water and a less dense liquid, poured in on the right-hand side. The density of the unknown liquid, in terms of height hw, hx and density of water ρw, is?
Answer» Diagram shows an open tube which contains some water and a less dense liquid, poured in on the right-hand side. The density of the unknown liquid, in terms of height $h_{w}$ , $h_{x}$ and density of water $ρ_{w}$ , is?

Discussion

27.	A resonant ac circuit contains a capacitor of capacitance 10−6F and an inductor of 10−4H. The frequency of electrical oscillations will be
Answer» A resonant ac circuit contains a capacitor of capacitance $10^{- 6} F$ and an inductor of $10^{- 4} H$ . The frequency of electrical oscillations will be

Discussion

28.	a satellite rotating very close to the surface of the earth has approximate linear speed equal toa. 7km/sb. 8km/s
Answer» a satellite rotating very close to the surface of the earth has approximate linear speed equal to a. 7km/s b. 8km/s

Discussion

29.	49. What will be the ratio of molar volume to atomic volume for 1mol. of hydrogen ? (Take the size of molecule to be 1Angstrom) ?
Answer» 49. What will be the ratio of molar volume to atomic volume for 1mol. of hydrogen ? (Take the size of molecule to be 1Angstrom) ?

Discussion

30.	the angular speed of earth around its own axis i
Answer» the angular speed of earth around its own axis i

Discussion

31.	Name a material whose resistance i) Decreases with increase in temperature ii) Is independent of temperature
Answer» Name a material whose resistance i) Decreases with increase in temperature ii) Is independent of temperature

31.

Name a material whose resistance i) Decreases with increase in temperature ii) Is independent of temperature

Answer»

Name a material whose resistance

i) Decreases with increase in temperature

ii) Is independent of temperature

Discussion

32.	The given figure shows a small, plane strip suspended from a fixed support through a string of length l. A continuous beam of monochromatic light is incident horizontally on the strip and is completely absorbed. The energy falling on the strip per unit time is W. Find the deflection of the string from the vertical if the strip stays in equilibrium.
Answer» The given figure shows a small, plane strip suspended from a fixed support through a string of length $l$ . A continuous beam of monochromatic light is incident horizontally on the strip and is completely absorbed. The energy falling on the strip per unit time is $W$ . Find the deflection of the string from the vertical if the strip stays in equilibrium.

Discussion

33.	The average kinetic energy for 5 moles of a ideal monoatomic gas at 27C is
Answer» The average kinetic energy for 5 moles of a ideal monoatomic gas at 27C is

Discussion

34.	If there is no torsion in the suspension thread, then the time period of a magnet executing SHM is
Answer» If there is no torsion in the suspension thread, then the time period of a magnet executing SHM is

Discussion

35.	A point charge +Q is placed at one corner of a cube as shown. Total electric flux passing through this cube isएक बिंदु आवेश +Q को दर्शाए अनुसार किसी घन के एक शीर्ष पर रखा जाता है। इस घन से गुजरने वाला कुल विद्युतफ्लक्स है
Answer» A point charge +Q is placed at one corner of a cube as shown. Total electric flux passing through this cube is एक बिंदु आवेश +Q को दर्शाए अनुसार किसी घन के एक शीर्ष पर रखा जाता है। इस घन से गुजरने वाला कुल विद्युतफ्लक्स है

Discussion

36.	The angular momentum of an electron in a certain orbit of Li+2 ion is 3.16×10−34 kg m2sec−1 . What will be the potential energy of electron in that orbit?Given : h=6.62×10−34J secπ=3.143.16×3.14≈9.93
Answer» The angular momentum of an electron in a certain orbit of $L i^{+ 2}$ ion is $3.16 \times 10^{- 34} {kg m}^{2} {sec}^{- 1}$ . What will be the potential energy of electron in that orbit? Given : $h = 6.62 \times 10^{- 34} J sec π = 3.14 3.16 \times 3.14 \approx 9.93$

Discussion

37.	64.An elevator of mass 4000kg is moving upwards and the tension in the supporting cable is 40000N. Find the upward acceleration. How far does it rise in a time of 10 starting from rest
Answer» 64.An elevator of mass 4000kg is moving upwards and the tension in the supporting cable is 40000N. Find the upward acceleration. How far does it rise in a time of 10 starting from rest

Discussion

38.	Two cars moving in opposite directions approach each other with a speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz. The frequency heard by the driver of the second car is [velocity of sound is 340 m/s][Assume, medium is stationary ]
Answer» Two cars moving in opposite directions approach each other with a speed of $22 m/s$ and $16.5 m/s$ respectively. The driver of the first car blows a horn having a frequency $400 Hz$ . The frequency heard by the driver of the second car is [velocity of sound is $340 m/s]$ [Assume, medium is stationary ]

Discussion

39.	The work function of two metals, Metal A and Metal B are 6.5 eV and 4.5 eV respectively. If the threshold wavelength of metal A is 2500 Å, the threshold wavelength of metal B would be approximately equal to
Answer» The work function of two metals, Metal A and Metal B are 6.5 eV and 4.5 eV respectively. If the threshold wavelength of metal A is 2500 Å, the threshold wavelength of metal B would be approximately equal to

Discussion

40.	When conductors connected to an EMF device, are the charge distribution and movement of charges throughout the surface or the bulk?
Answer» When conductors connected to an EMF device, are the charge distribution and movement of charges throughout the surface or the bulk?

Discussion

41.	The ammeter in the figure will read
Answer» The ammeter in the figure will read

Discussion

42.	A mass m=20 g has a charge q=3.0 mC. It moves with a velocity of 20 m/s and enters a region of electric field of 80 N/C in the same direction as the velocity of the mass. The velocity of the mass after 3 sec in this region is–
Answer» A mass $m = 20 g$ has a charge $q = 3.0 mC$ . It moves with a velocity of $20 m/s$ and enters a region of electric field of $80 N/C$ in the same direction as the velocity of the mass. The velocity of the mass after $3 sec$ in this region is–

Discussion

43.	Q. When a load of 10 kg is suspended on a metallic wire its length increases by 2 mm the force constant of the wire is (1) 3×10⁴ N/m (2) 2.5×10³ N/m (3) 5×10⁴ N/m (4) 7.5×10³ N/m
Answer» Q. When a load of 10 kg is suspended on a metallic wire its length increases by 2 mm the force constant of the wire is (1) 3×10⁴ N/m (2) 2.5×10³ N/m (3) 5×10⁴ N/m (4) 7.5×10³ N/m

Discussion

44.	In the arrangement shown, the block is released from rest from x=0 (when the spring was in its natural length), on a rough incline surface having μ=0.5x. The maximum elongation in the spring will be,
Answer» In the arrangement shown, the block is released from rest from $x = 0$ (when the spring was in its natural length), on a rough incline surface having $μ = 0.5 x .$ The maximum elongation in the spring will be,

Discussion

45.	One end of a light spring of spring constant 200 N/m is fixed to a block A of mass 2 kg placed on horizontal frictionless table. The other end of the spring is fixed to a wall. A smaller block B of mass 3 kg is placed on block A. The system is displaced by a small amount and released. What is the magnitude of friction coefficient μ at the surface of block A and B so that the upper block does not slip over lower block ?(Amplitude (A)=0.1 m)
Answer» One end of a light spring of spring constant $200 N/m$ is fixed to a block $A$ of mass $2 kg$ placed on horizontal frictionless table. The other end of the spring is fixed to a wall. A smaller block $B$ of mass $3 kg$ is placed on block $A$ . The system is displaced by a small amount and released. What is the magnitude of friction coefficient $μ$ at the surface of block $A$ and $B$ so that the upper block does not slip over lower block $?$ (Amplitude $(A) = 0.1 m)$

Discussion

46.	A ring of radius 5 m and linear mass density λ=0.1π kg/m is spinning about an axis passing through its COM perpendicular to its plane. Find the moment of inertia of the ring about this axis.
Answer» A ring of radius $5 m$ and linear mass density $λ = \frac{0.1}{π} kg/m$ is spinning about an axis passing through its COM perpendicular to its plane. Find the moment of inertia of the ring about this axis.

Discussion

47.	A small block slides down from the top of hemisphere of radius R=3 m as shown in the figure.The height ′h′ at which the block will lose contact with the surface of the sphere is (in m).(Assume there is no friction between the block and the hemisphere)
Answer» A small block slides down from the top of hemisphere of radius $R = 3 m$ as shown in the figure.The height $^{'} h^{'}$ at which the block will lose contact with the surface of the sphere is $(in m)$ . (Assume there is no friction between the block and the hemisphere)

Discussion

48.	P-113(QB) Q-41A ray of light appears on a rectangular glass panel of t thickness and incised at a small angle. If the refractive index of glass is μ, show that the perpendicular distance between the ray emitted from the glass panel and the incident ray is tθ(μ-1)/μ
Answer» P-113(QB) Q-41 A ray of light appears on a rectangular glass panel of t thickness and incised at a small angle. If the refractive index of glass is μ, show that the perpendicular distance between the ray emitted from the glass panel and the incident ray is tθ(μ-1)/μ

Discussion

49.	A body is moving down a long incline of slope 37∘. The coefficient of friction between the body and plane varies as μ=0.3x, where x (in m) is distance travelled down the plane. The body will have maximum speed at x=k2 m. Then the value of k is (sin37o=3/5, g=10 m/s2)
Answer» A body is moving down a long incline of slope $37^{\circ}$ . The coefficient of friction between the body and plane varies as $μ = 0.3 x$ , where $x$ (in $m$ ) is distance travelled down the plane. The body will have maximum speed at $x = \frac{k}{2} m$ . Then the value of $k$ is $(sin 37^{o} = 3 / 5, g = 10 {m/s}^{2})$

Discussion

50.	Write two factors affecting kinetic energy. Also draw a graph between kinetic energy and mass?
Answer» Write two factors affecting kinetic energy. Also draw a graph between kinetic energy and mass?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

orbital speed when less than vo than trajector

The temperature of n moles of an ideal gas is increased from T to 4T through a process for which pressure where a is constant. The work done by gas is:

A body of mass 5kg makes an elastic head on Collison with an object of unknown mass and moves in original direction after Collison with a velocity equal to 1/10th of the original velocity. Calculate the mass of second object

25 tuning forks are arranged in decreasing order of frequency. Any two successive forks produce 3 beats/sec. If the frequency of the first tuning fork is the octave of last, then the frequency of 21st fork is

If the critical constants of a hypothetical gas are Vc=150 cm3 mol−1, PC=50 atm and TC = 300 K. Then the radius of the molecule is: [Take atm mol−1K−1]

It takes 20 s for a person A to climb up the stairs, while another person B does the same in 45 s and both having same mass. Finda) Ratio of works done by A and Bb) Ratio of powers expended by A and B

The correct image of the given analog clock in a plane mirror will be:

If de Broglie wavelength associated with an electron is 3×10−10 m, then the momentum of the electron will be -

A particle is sticked to a disc at a distance r2 m from centre. Disc has initial angular velocity of ωo=6^j rad/s and constant angular acceleration of α=−^j rad/s2 as shown in figure. If radius of disc is 1 m, find the speed of particle after t=2 s.

Figure shows a long straight current carrying wire with current I1=0.5 A, and a thin strip of width b=10 cm and length l=1.5 m placed parallel to it with a current I2=2 A as shown. The distance between wire and strip is r=1 m. Find the magnetic force of interaction between current I1 and I2.

Is it possible form a closed surface in uniform electric field to have a non zero flux

A body hangs from a spring balance supported from the roof of the elevator, the balance reads 50 N when the elevator has an upward acceleration of 2.5 m/s2. What is the true weight of the body? (Take g = 10 m/s2)

a uniformly charged rod with linear charge density λ of length L is inserted into a hollow cubical structure of side L with cons†an t velocity and moves out from the opposite face. draw the graph between flux and time

If the sun is in the 60° with respect to ground and the length of shadow of tree who is coming in front of it is 150m then find the length of the tree ?

Block A has a mass of 30 kg and block B a mass of 15 kg. The coefficients of friction between all surfaces of contact are μs=0.15 and μk=0.10. Knowing that θ=30∘ and that the magnitude of the force F applied to block A is 250 N, determine the accelaration of block A.[Take g=10 m/s2]

Determine the point of application of net force, when forces of 20 N &amp; 30 N are acting on the rod as shown in figure.

In Figure,identify the following vectors.(i) Coinitial (ii) Equal (iii) Collinearbut not equal

A heater is designed to operate with a power of 1000 W in a 100 V supply line. It is connected in combination with a resistance of 10 Ω and a resistance R to a 100 V power supply as shown in figure. What will be the value of R , such that heater operates with a power of 62.5 W?

A wire carrying current I has the configuration shown in figure. What is the value of θ for the magnetic induction B to be zero at the centre of the circle

ntcan cathode ray tubes be considered as a capacitor since it has two metal plates seperated be empty space and p.d. is applied across the two endsn

What is Hamiltonian operator in Schrodinger wave equation?

27.The maximum time period period of any simple pendulum on the earth is

An electric charge +q moves with velocity →V=3^i+4^j+^k, in an electromagnetic field given by→E=3^i+^j+2^k &amp; →B=^i+^j+3^k.The y−component of the force experienced by +q is :

Diagram shows an open tube which contains some water and a less dense liquid, poured in on the right-hand side. The density of the unknown liquid, in terms of height hw, hx and density of water ρw, is?

A resonant ac circuit contains a capacitor of capacitance 10−6F and an inductor of 10−4H. The frequency of electrical oscillations will be

a satellite rotating very close to the surface of the earth has approximate linear speed equal toa. 7km/sb. 8km/s

49. What will be the ratio of molar volume to atomic volume for 1mol. of hydrogen ? (Take the size of molecule to be 1Angstrom) ?

the angular speed of earth around its own axis i

Name a material whose resistance i) Decreases with increase in temperature ii) Is independent of temperature

The average kinetic energy for 5 moles of a ideal monoatomic gas at 27C is

If there is no torsion in the suspension thread, then the time period of a magnet executing SHM is

The angular momentum of an electron in a certain orbit of Li+2 ion is 3.16×10−34 kg m2sec−1 . What will be the potential energy of electron in that orbit?Given : h=6.62×10−34J secπ=3.143.16×3.14≈9.93

64.An elevator of mass 4000kg is moving upwards and the tension in the supporting cable is 40000N. Find the upward acceleration. How far does it rise in a time of 10 starting from rest

Two cars moving in opposite directions approach each other with a speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz. The frequency heard by the driver of the second car is [velocity of sound is 340 m/s][Assume, medium is stationary ]

The work function of two metals, Metal A and Metal B are 6.5 eV and 4.5 eV respectively. If the threshold wavelength of metal A is 2500 Å, the threshold wavelength of metal B would be approximately equal to

When conductors connected to an EMF device, are the charge distribution and movement of charges throughout the surface or the bulk?

The ammeter in the figure will read

A mass m=20 g has a charge q=3.0 mC. It moves with a velocity of 20 m/s and enters a region of electric field of 80 N/C in the same direction as the velocity of the mass. The velocity of the mass after 3 sec in this region is–

Q. When a load of 10 kg is suspended on a metallic wire its length increases by 2 mm the force constant of the wire is (1) 3×10⁴ N/m (2) 2.5×10³ N/m (3) 5×10⁴ N/m (4) 7.5×10³ N/m

In the arrangement shown, the block is released from rest from x=0 (when the spring was in its natural length), on a rough incline surface having μ=0.5x. The maximum elongation in the spring will be,

A ring of radius 5 m and linear mass density λ=0.1π kg/m is spinning about an axis passing through its COM perpendicular to its plane. Find the moment of inertia of the ring about this axis.

A small block slides down from the top of hemisphere of radius R=3 m as shown in the figure.The height ′h′ at which the block will lose contact with the surface of the sphere is (in m).(Assume there is no friction between the block and the hemisphere)

P-113(QB) Q-41A ray of light appears on a rectangular glass panel of t thickness and incised at a small angle. If the refractive index of glass is μ, show that the perpendicular distance between the ray emitted from the glass panel and the incident ray is tθ(μ-1)/μ

A body is moving down a long incline of slope 37∘. The coefficient of friction between the body and plane varies as μ=0.3x, where x (in m) is distance travelled down the plane. The body will have maximum speed at x=k2 m. Then the value of k is (sin37o=3/5, g=10 m/s2)

Write two factors affecting kinetic energy. Also draw a graph between kinetic energy and mass?

Determine the point of application of net force, when forces of 20 N & 30 N are acting on the rod as shown in figure.

An electric charge +q moves with velocity →V=3^i+4^j+^k, in an electromagnetic field given by→E=3^i+^j+2^k & →B=^i+^j+3^k.The y−component of the force experienced by +q is :