50278 + Interview Questions in Physics

1.	[MP PET 2003]
Answer» [MP PET 2003]

1.

[MP PET 2003]

Answer»

[MP PET 2003]

2.	A system of two blocks A and B are connected by an inextensiible massless string as shown in figure. The pulley is massless and frictionless. Initially, the system is at rest. A bullet of mass m moving with a velocity u as shown in the figure hits block B and gets embedded into it. Then find out the impulse imparted by tension force to the block of mass 3m, immediately after the collision takes place.
Answer» A system of two blocks $A$ and $B$ are connected by an inextensiible massless string as shown in figure. The pulley is massless and frictionless. Initially, the system is at rest. A bullet of mass $m$ moving with a velocity $u$ as shown in the figure hits block $B$ and gets embedded into it. Then find out the impulse imparted by tension force to the block of mass $3 m$ , immediately after the collision takes place.

Discussion

3.	A Driver is driving a car at speed of 72 km/hr on road. He sees a boy on road at a distance of 48 m from him. If his reaction time is 0.4 sec, find minimum retardation required to save the boy.
Answer» A Driver is driving a car at speed of 72 km/hr on road. He sees a boy on road at a distance of 48 m from him. If his reaction time is 0.4 sec, find minimum retardation required to save the boy.

Discussion

4.	A proton is fired from very far away towards a nucleus with charge Q=120e, where Q is the electric charge. It makes a closest approach of 10 fm to the nucleus. The de Broglie wavelength (in units of fm) of the proton at its start is (proton -mass=53×10−27 kg, he=4.2×10−15J sC−1)
Answer» A proton is fired from very far away towards a nucleus with charge $Q = 120 e$ , where $Q$ is the electric charge. It makes a closest approach of 10 fm to the nucleus. The de Broglie wavelength (in units of fm) of the proton at its start is $(proton -mass = \frac{5}{3} \times 10^{- 27} kg, \frac{h}{e} = 4.2 \times 10^{- 15} J s C^{- 1})$

Discussion

5.	Pressure head in Bernoulli's equation is
Answer» Pressure head in Bernoulli's equation is

Discussion

6.	Why does volume change with the change in temperature?
Answer» Why does volume change with the change in temperature?

Discussion

7.	Find the capacitance between P and O. Each capacitor has capacitance C
Answer» Find the capacitance between P and O. Each capacitor has capacitance $C$

Discussion

8.	At constant volume the specific heat of a gas is 3R2, then the value of γ will be
Answer» At constant volume the specific heat of a gas is $\frac{3 R}{2}$ , then the value of $γ$ will be

Discussion

9.	Two bullets are fired with horizontal velocities of 50m/s and 100 m/s from two guns at a height of 19.6 m .(a) after how much time and which bullet will strike first ?(b)what would be the path of the bullets?(g=9.8m/s2)
Answer» Two bullets are fired with horizontal velocities of 50m/s and 100 m/s from two guns at a height of 19.6 m .(a) after how much time and which bullet will strike first ?(b)what would be the path of the bullets?(g=9.8m/s^2₎

Discussion

10.	Two blocks of mass M1=20 kg and M2=12 kg are connected by a metal rod of mass 8 kg. The system is pulled vertically up by applying a force of 480 N as shown. The tension at the mid-point of the rod is: (Taking g=10 m/s2 )
Answer» Two blocks of mass $M_{1} = 20 kg$ and $M_{2} = 12 kg$ are connected by a metal rod of mass $8 kg$ . The system is pulled vertically up by applying a force of $480 N$ as shown. The tension at the mid-point of the rod is: (Taking $g = 10 {m/s}^{2}$ )

Discussion

11.	Two identical blocks are resting on supports as shown. Two identical bullets travelling with the same speed hit the blocks & get embedded in them in very short time. The blocks leave the contact immediately after bullet strikes them. In case (i), bullet's velocity is toward centre of mass and in case (ii), bullet's velocity is off centre. The kinetic energies after collision are K1 & K2 and maximum height reached by the centre of mass are h1 & h2 respectively. Then
Answer» Two identical blocks are resting on supports as shown. Two identical bullets travelling with the same speed hit the blocks & get embedded in them in very short time. The blocks leave the contact immediately after bullet strikes them. In case (i), bullet's velocity is toward centre of mass and in case (ii), bullet's velocity is off centre. The kinetic energies after collision are $K_{1}$ & $K_{2}$ and maximum height reached by the centre of mass are $h_{1}$ & $h_{2}$ respectively. Then

Discussion

12.	The separation betweenthe consecutive darki fringes in a young's double slit experiment is 1.0 mm. The screen is placed at a distance of 2.5 m from the slits an the separation between the slits is 1.0 mm. Calculate the wavelength of light used for the experiment.
Answer» The separation betweenthe consecutive darki fringes in a young's double slit experiment is 1.0 mm. The screen is placed at a distance of 2.5 m from the slits an the separation between the slits is 1.0 mm. Calculate the wavelength of light used for the experiment.

12.

The separation betweenthe consecutive darki fringes in a young's double slit experiment is 1.0 mm. The screen is placed at a distance of 2.5 m from the slits an the separation between the slits is 1.0 mm. Calculate the wavelength of light used for the experiment.

Answer»

The separation betweenthe consecutive darki fringes in a young's double slit experiment is 1.0 mm. The screen is placed at a distance of 2.5 m from the slits an the separation between the slits is 1.0 mm. Calculate the wavelength of light used for the experiment.

Discussion

13.	An electric dipole consisting of two opposite charges of 2×10−6 C each, separated by a distance of 3 cm is placed in an electric field of 2×105 N/C. The maximum torque on the dipole will be
Answer» An electric dipole consisting of two opposite charges of $2 \times 10^{- 6} C$ each, separated by a distance of 3 cm is placed in an electric field of $2 \times 10^{5} N / C$ . The maximum torque on the dipole will be

Discussion

14.	In a series LCR circit R = 10 Ω and the impedance Z = 20 Ω . Then the phase difference between the current and the voltage is
Answer» In a series LCR circit R = 10 $Ω$ and the impedance Z = 20 $Ω$ . Then the phase difference between the current and the voltage is

Discussion

15.	A cart of mass M is at rest on a frictionless horizontal surface and a pendulum bob of mass m bangs from the roof of the cart (below figure).the string breaks,the bob falls on the floor,makes several collisions on the floor and finally lands up in a small made in the floor,The horizontal distance between the string and the slot is L.Find the displacement of the cart during this process.
Answer» A cart of mass M is at rest on a frictionless horizontal surface and a pendulum bob of mass m bangs from the roof of the cart (below figure).the string breaks,the bob falls on the floor,makes several collisions on the floor and finally lands up in a small made in the floor,The horizontal distance between the string and the slot is L.Find the displacement of the cart during this process.

15.

A cart of mass M is at rest on a frictionless horizontal surface and a pendulum bob of mass m bangs from the roof of the cart (below figure).the string breaks,the bob falls on the floor,makes several collisions on the floor and finally lands up in a small made in the floor,The horizontal distance between the string and the slot is L.Find the displacement of the cart during this process.

Answer»

A cart of mass M is at rest on a frictionless horizontal surface and a pendulum bob of mass m bangs from the roof of the cart (below figure).the string breaks,the bob falls on the floor,makes several collisions on the floor and finally lands up in a small made in the floor,The horizontal distance between the string and the slot is L.Find the displacement of the cart during this process.

Discussion

16.	In H-atom, if ‘x’ is the radius of first Bohr orbit, de Broglie wavelength of an electron in 3rd orbit is:
Answer» In H-atom, if ‘x’ is the radius of first Bohr orbit, de Broglie wavelength of an electron in $3^{r d}$ orbit is:

Discussion

17.	Differentiate the following questions w.r.t. x. log(cos ex).
Answer» Differentiate the following questions w.r.t. x. $l o g (c o s e^{x}) .$

17.

Differentiate the following questions w.r.t. x. log(cos ex).

Answer»

Differentiate the following questions w.r.t. x.

$l o g (c o s e^{x}) .$

Discussion

18.	Consider the situation described in the previous problem. Where should a point source be placed on the principal axis so that the two images form at the same place ?
Answer» Consider the situation described in the previous problem. Where should a point source be placed on the principal axis so that the two images form at the same place ?

Discussion

19.	The object distance u, the image distance v and the magnification m in a lens follow certain linear relations. These are
Answer» The object distance u, the image distance v and the magnification m in a lens follow certain linear relations. These are

Discussion

20.	Consider two objects with masses m1 and m2 (m1>m2) connected by a light string that passes over a pulley having a moment of inertia of I about its axis of rotation as shown in figure. The string does not slip on the pulley or stretch. The pulley turns without fiction. The two objects are released from rest separated by a vertical distance 2h. The translational speeds of the objects as they pass each other is
Answer» Consider two objects with masses $m_{1}$ and $m_{2}$ ( $m_{1} > m_{2}$ ) connected by a light string that passes over a pulley having a moment of inertia of $I$ about its axis of rotation as shown in figure. The string does not slip on the pulley or stretch. The pulley turns without fiction. The two objects are released from rest separated by a vertical distance 2 $h$ . The translational speeds of the objects as they pass each other is

Discussion

21.	A body constrained to move along the z-axis of a co-ordinate system is subjected to a constant force →F=(−^i+2^j+3^k) N. What is the work done by the force in moving the body over a distance of 4 m along the z-axis?
Answer» A body constrained to move along the $z$ -axis of a co-ordinate system is subjected to a constant force $\to F = (-^i + 2^j + 3^k) N$ . What is the work done by the force in moving the body over a distance of $4 m$ along the $z$ -axis?

Discussion

22.	Which of the given sets of temperature and pressure will cause a gas to exhibit the greatest deviation from ideal gas behavior
Answer» Which of the given sets of temperature and pressure will cause a gas to exhibit the greatest deviation from ideal gas behavior

Discussion

23.	A rod of mass 2 m moves vertically downward on the surface of wedge of mass as shown in the figure. Find the relation between velocity of rod and that of the wedge at any instant.
Answer» A rod of mass $2 m$ moves vertically downward on the surface of wedge of mass as shown in the figure. Find the relation between velocity of rod and that of the wedge at any instant.

Discussion

24.	10 identical cells are connected in series with similar polarity to an external resistance. Current through this resistance is ′I′. Now polarity of two cells are reversed, calculate current through same resistance.
Answer» $10$ identical cells are connected in series with similar polarity to an external resistance. Current through this resistance is $^{'} I^{'}$ . Now polarity of two cells are reversed, calculate current through same resistance.

Discussion

25.	If the line y=x is a tangent to the parabola y=ax2+bx+c at the point (1,1) and the curve passes through (−1,0), then
Answer» If the line $y = x$ is a tangent to the parabola $y = a x^{2} + b x + c$ at the point $(1, 1)$ and the curve passes through $(- 1, 0)$ , then

Discussion

26.	When an object is kept at a distance of 30 cm from a concave mirror, the image is formed at a distance of 10 cm. If the object is moved with a speed of 9 cms−1 in horizontal direction, the speed with which the image moves is
Answer» When an object is kept at a distance of $30 cm$ from a concave mirror, the image is formed at a distance of $10 cm$ . If the object is moved with a speed of $9 {cms}^{- 1}$ in horizontal direction, the speed with which the image moves is

Discussion

27.	Is B(Boron) doped with Si(Silicon) a p-type or a n-type semiconductor. And why?
Answer» Is B(Boron) doped with Si(Silicon) a p-type or a n-type semiconductor. And why?

Discussion

28.	Velocity of sound in air is 320 m/s. A pipe closed at one end has a length of 1 m, neglecting end corrections. Find the frequency(s) for which the air column in the pipe can resonate.
Answer» Velocity of sound in air is $320 m/s$ . A pipe closed at one end has a length of $1 m$ , neglecting end corrections. Find the frequency(s) for which the air column in the pipe can resonate.

Discussion

29.	A particle moves half the time of its journey with velocity u. The rest of the half time it moves with two velocities V1 and V2 such that half the distance it covers with V1 and the other half with V2. Find the net average velocity. Assume straight line motion.
Answer» A particle moves half the time of its journey with velocity $u$ . The rest of the half time it moves with two velocities $V_{1}$ and $V_{2}$ such that half the distance it covers with $V_{1}$ and the other half with $V_{2}$ . Find the net average velocity. Assume straight line motion.

Discussion

30.	A body is projected along a rough horizontal surface with a velocity 6 m/s. If the body comes to rest after travelling 9 m, then coefficient of sliding friction, is (g=10 m/s2)
Answer» A body is projected along a rough horizontal surface with a velocity $6 m/s$ . If the body comes to rest after travelling $9 m$ , then coefficient of sliding friction, is ( $g = 10 {m/s}^{2}$ )

Discussion

31.	A string of length L and force constant K is stretched to obtain extension l. It is further stretched to obtain extension l1. The work done in second stretching is:
Answer» A string of length L and force constant K is stretched to obtain extension $l$ . It is further stretched to obtain extension $l_{1}$ . The work done in second stretching is:

Discussion

32.	The electric potential in a certain region of space is given by v=−3x2+4x, where x is in metres and v is in volts. In this region, the equipotential surfaces are
Answer» The electric potential in a certain region of space is given by $v = - 3 x^{2} + 4 x$ , where x is in metres and v is in volts. In this region, the equipotential surfaces are

32.

The electric potential in a certain region of space is given by v=−3x2+4x, where x is in metres and v is in volts. In this region, the equipotential surfaces are

Answer»

The electric potential in a certain region of space is given by $v = - 3 x^{2} + 4 x$ , where x is in metres and v is in volts. In this region, the equipotential surfaces are

Discussion

33.	For standing waves in string, the minimum gap between two points which are fixed or do not oscillate is: (λ= wavelength)
Answer» For standing waves in string, the minimum gap between two points which are fixed or do not oscillate is: ( $λ =$ wavelength)

Discussion

34.	A circular disc with a groove along its diameter is placed horizontally. A block of mass 1 kg is placed as shown. The coefficient of friction between the block and all surfaces of groove in contact is μ=25. The disc has an acceleration of 25 m/s2 Find the acceleration of the block with respect to disc.
Answer» A circular disc with a groove along its diameter is placed horizontally. A block of mass $1 kg$ is placed as shown. The coefficient of friction between the block and all surfaces of groove in contact is $μ = \frac{2}{5}$ . The disc has an acceleration of $25 m / s^{2}$ Find the acceleration of the block with respect to disc.

Discussion

35.	A wire of mass m kg with uniform cross section is bent in the shape as shown in figure. If origin is taken at O, find the co-ordinates of the center of mass of the given system (in metres).
Answer» A wire of mass $m kg$ with uniform cross section is bent in the shape as shown in figure. If origin is taken at $O$ , find the co-ordinates of the center of mass of the given system (in metres).

Discussion

36.	A spring balance attached to the roof of a moving elevator indicates 80 kg weight as the weight of a 120 kg body. What is the acceleration of the elevation? (Take g=10 m/s2)
Answer» A spring balance attached to the roof of a moving elevator indicates $80 kg$ weight as the weight of a $120 kg$ body. What is the acceleration of the elevation? (Take $g = 10 m / s^{2}$ )

Discussion

37.	A stone is dropped from 25th storey of a multistorey building and reaches the ground in 5 s. How many storey of the building will the stone cover in first second, if the height of each storey is same? (Take g=10 m/s2)
Answer» A stone is dropped from $25 th$ storey of a multistorey building and reaches the ground in $5 s$ . How many storey of the building will the stone cover in first second, if the height of each storey is same? (Take $g = 10 m / s^{2}$ )

Discussion

38.	Graph between log p and log1÷V for a fixed amount of a gas at constant temperature
Answer» Graph between log p and log1÷V for a fixed amount of a gas at constant temperature

Discussion

39.	Charge to mass ratio of electron
Answer» Charge to mass ratio of electron

Discussion

40.	In an experiment with Foucault's apparatus, the various distances used are as follows : Distance between the rotating and the fixed mirror = 16 m Distance between the lens and the rotating mirror = 6 m, Distance between thesource and the lens = 2 m. When the mirror is rotated at a speed of 356 revolutions per seconod, the image shifts by 0.7 mm. Calculate the speed of light from these data.
Answer» In an experiment with Foucault's apparatus, the various distances used are as follows : Distance between the rotating and the fixed mirror = 16 m Distance between the lens and the rotating mirror = 6 m, Distance between thesource and the lens = 2 m. When the mirror is rotated at a speed of 356 revolutions per seconod, the image shifts by 0.7 mm. Calculate the speed of light from these data.

40.

In an experiment with Foucault's apparatus, the various distances used are as follows : Distance between the rotating and the fixed mirror = 16 m Distance between the lens and the rotating mirror = 6 m, Distance between thesource and the lens = 2 m. When the mirror is rotated at a speed of 356 revolutions per seconod, the image shifts by 0.7 mm. Calculate the speed of light from these data.

Answer»

In an experiment with Foucault's apparatus, the various distances used are as follows :

Distance between the rotating and the fixed mirror = 16 m

Distance between the lens and the rotating mirror = 6 m,

Distance between thesource and the lens = 2 m.

When the mirror is rotated at a speed of 356 revolutions per seconod, the image shifts by 0.7 mm. Calculate the speed of light from these data.

Discussion

41.	The acceleration due to gravity becomes g/2 (g= acceleration due to gravity on the surface of earth) at a height equal to
Answer» The acceleration due to gravity becomes g/2 (g= acceleration due to gravity on the surface of earth) at a height equal to

Discussion

42.	Water is filled in a cylindrical container to a height of 3 m. The ratio of the cross-section area of the orifice and the beaker is 0.1. The square of the speed of the liquid coming out from the orifice is
Answer» Water is filled in a cylindrical container to a height of 3 m. The ratio of the cross-section area of the orifice and the beaker is 0.1. The square of the speed of the liquid coming out from the orifice is

Discussion

43.	I have doubt on 29 question
Answer» I have doubt on 29 question

Discussion

44.	A block attached to a spring, pulled by a constant horizontal force, is kept on a smooth surface as shown in fig. Initially, the spring is in the natural length state. Then the maximum positive work that the applied force F can do is (given that string does not break)
Answer» A block attached to a spring, pulled by a constant horizontal force, is kept on a smooth surface as shown in fig. Initially, the spring is in the natural length state. Then the maximum positive work that the applied force F can do is (given that string does not break)

44.

A block attached to a spring, pulled by a constant horizontal force, is kept on a smooth surface as shown in fig. Initially, the spring is in the natural length state. Then the maximum positive work that the applied force F can do is (given that string does not break)

Answer»

A block attached to a spring, pulled by a constant horizontal force, is kept on a smooth surface as shown in fig. Initially, the spring is in the natural length state. Then the maximum positive work that the applied force F can do is (given that string does not break)

Discussion

45.	A body is projected upward with a velocity u. It passes through a certain point above the ground after t1. From this instant, the time after which the body passes through the same point during the return journey is
Answer» A body is projected upward with a velocity u. It passes through a certain point above the ground after $t_{1}$ . From this instant, the time after which the body passes through the same point during the return journey is

Discussion

46.	An object has kinetic energy E when it is projected at an angle of maximum range then at the highest point of its path the kinetic energy E of the object will be
Answer» An object has kinetic energy E when it is projected at an angle of maximum range then at the highest point of its path the kinetic energy E of the object will be

Discussion

47.	Why is blind sport devoid of vision?
Answer» Why is blind sport devoid of vision?

Discussion

48.	Two concentric conducting shells with radii r and R (r < R) have charges q and Q respectively. Determine the electrostatic potential difference between them.
Answer» Two concentric conducting shells with radii r and R (r < R) have charges q and Q respectively. Determine the electrostatic potential difference between them.

Discussion

49.	A proton and an α -particle are accelerated through a potential difference of 100 V. The ratio of the wavelength associated with the proton to that associated with an α-particle is
Answer» A proton and an $α$ -particle are accelerated through a potential difference of 100 V. The ratio of the wavelength associated with the proton to that associated with an $α$ -particle is

Discussion

50.	A thin wire of length L and uniform linear mass density ρ Is bent into a circular loop with centre at 0 as shown in the figure. The moment of inertia of the loop about the axis XX’ is
Answer» A thin wire of length L and uniform linear mass density $ρ$ Is bent into a circular loop with centre at 0 as shown in the figure. The moment of inertia of the loop about the axis XX’ is

50.

A thin wire of length L and uniform linear mass density ρ Is bent into a circular loop with centre at 0 as shown in the figure. The moment of inertia of the loop about the axis XX’ is

Answer»

A thin wire of length L and uniform linear mass density $ρ$ Is bent into a circular loop with centre at 0 as shown in the figure. The moment of inertia of the loop about the axis XX’ is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

[MP PET 2003]

A Driver is driving a car at speed of 72 km/hr on road. He sees a boy on road at a distance of 48 m from him. If his reaction time is 0.4 sec, find minimum retardation required to save the boy.

A proton is fired from very far away towards a nucleus with charge Q=120e, where Q is the electric charge. It makes a closest approach of 10 fm to the nucleus. The de Broglie wavelength (in units of fm) of the proton at its start is (proton -mass=53×10−27 kg, he=4.2×10−15J sC−1)

Pressure head in Bernoulli's equation is

Why does volume change with the change in temperature?

Find the capacitance between P and O. Each capacitor has capacitance C

At constant volume the specific heat of a gas is 3R2, then the value of γ will be

Two bullets are fired with horizontal velocities of 50m/s and 100 m/s from two guns at a height of 19.6 m .(a) after how much time and which bullet will strike first ?(b)what would be the path of the bullets?(g=9.8m/s2)

Two blocks of mass M1=20 kg and M2=12 kg are connected by a metal rod of mass 8 kg. The system is pulled vertically up by applying a force of 480 N as shown. The tension at the mid-point of the rod is: (Taking g=10 m/s2 )

The separation betweenthe consecutive darki fringes in a young's double slit experiment is 1.0 mm. The screen is placed at a distance of 2.5 m from the slits an the separation between the slits is 1.0 mm. Calculate the wavelength of light used for the experiment.

An electric dipole consisting of two opposite charges of 2×10−6 C each, separated by a distance of 3 cm is placed in an electric field of 2×105 N/C. The maximum torque on the dipole will be

In a series LCR circit R = 10 Ω and the impedance Z = 20 Ω . Then the phase difference between the current and the voltage is

In H-atom, if ‘x’ is the radius of first Bohr orbit, de Broglie wavelength of an electron in 3rd orbit is:

Differentiate the following questions w.r.t. x. log(cos ex).

Consider the situation described in the previous problem. Where should a point source be placed on the principal axis so that the two images form at the same place ?

The object distance u, the image distance v and the magnification m in a lens follow certain linear relations. These are

A body constrained to move along the z-axis of a co-ordinate system is subjected to a constant force →F=(−^i+2^j+3^k) N. What is the work done by the force in moving the body over a distance of 4 m along the z-axis?

Which of the given sets of temperature and pressure will cause a gas to exhibit the greatest deviation from ideal gas behavior

A rod of mass 2 m moves vertically downward on the surface of wedge of mass as shown in the figure. Find the relation between velocity of rod and that of the wedge at any instant.

10 identical cells are connected in series with similar polarity to an external resistance. Current through this resistance is ′I′. Now polarity of two cells are reversed, calculate current through same resistance.

If the line y=x is a tangent to the parabola y=ax2+bx+c at the point (1,1) and the curve passes through (−1,0), then

When an object is kept at a distance of 30 cm from a concave mirror, the image is formed at a distance of 10 cm. If the object is moved with a speed of 9 cms−1 in horizontal direction, the speed with which the image moves is

Is B(Boron) doped with Si(Silicon) a p-type or a n-type semiconductor. And why?

Velocity of sound in air is 320 m/s. A pipe closed at one end has a length of 1 m, neglecting end corrections. Find the frequency(s) for which the air column in the pipe can resonate.

A particle moves half the time of its journey with velocity u. The rest of the half time it moves with two velocities V1 and V2 such that half the distance it covers with V1 and the other half with V2. Find the net average velocity. Assume straight line motion.

A body is projected along a rough horizontal surface with a velocity 6 m/s. If the body comes to rest after travelling 9 m, then coefficient of sliding friction, is (g=10 m/s2)

A string of length L and force constant K is stretched to obtain extension l. It is further stretched to obtain extension l1. The work done in second stretching is:

The electric potential in a certain region of space is given by v=−3x2+4x, where x is in metres and v is in volts. In this region, the equipotential surfaces are

For standing waves in string, the minimum gap between two points which are fixed or do not oscillate is: (λ= wavelength)

A wire of mass m kg with uniform cross section is bent in the shape as shown in figure. If origin is taken at O, find the co-ordinates of the center of mass of the given system (in metres).

A spring balance attached to the roof of a moving elevator indicates 80 kg weight as the weight of a 120 kg body. What is the acceleration of the elevation? (Take g=10 m/s2)

A stone is dropped from 25th storey of a multistorey building and reaches the ground in 5 s. How many storey of the building will the stone cover in first second, if the height of each storey is same? (Take g=10 m/s2)

Graph between log p and log1÷V for a fixed amount of a gas at constant temperature

Charge to mass ratio of electron

The acceleration due to gravity becomes g/2 (g= acceleration due to gravity on the surface of earth) at a height equal to

Water is filled in a cylindrical container to a height of 3 m. The ratio of the cross-section area of the orifice and the beaker is 0.1. The square of the speed of the liquid coming out from the orifice is

I have doubt on 29 question

A block attached to a spring, pulled by a constant horizontal force, is kept on a smooth surface as shown in fig. Initially, the spring is in the natural length state. Then the maximum positive work that the applied force F can do is (given that string does not break)

A body is projected upward with a velocity u. It passes through a certain point above the ground after t1. From this instant, the time after which the body passes through the same point during the return journey is

An object has kinetic energy E when it is projected at an angle of maximum range then at the highest point of its path the kinetic energy E of the object will be

Why is blind sport devoid of vision?

Two concentric conducting shells with radii r and R (r &lt; R) have charges q and Q respectively. Determine the electrostatic potential difference between them.

A proton and an α -particle are accelerated through a potential difference of 100 V. The ratio of the wavelength associated with the proton to that associated with an α-particle is

A thin wire of length L and uniform linear mass density ρ Is bent into a circular loop with centre at 0 as shown in the figure. The moment of inertia of the loop about the axis XX’ is

Two concentric conducting shells with radii r and R (r < R) have charges q and Q respectively. Determine the electrostatic potential difference between them.