50278 + Interview Questions in Physics

1.	A container is filled with liquid upto height H.There is a hole in the base of container whose area of cross section is A_1 \{ A_2 is area of cross section of container \}.The time in which first half of the liquid escapes from the container \{ A_1
Answer» A container is filled with liquid upto height H.There is a hole in the base of container whose area of cross section is A_1 \{ A_2 is area of cross section of container \}.The time in which first half of the liquid escapes from the container \{ A_1<< A_2 \} is

Discussion

2.	a parralel plate capacitor ,capacitance C is charged with a battery of v volts.a dielectric slab of di electric constant K is placed between the plates to fully occupy space .the battery remains connected.what will be new electrosatic force of attraction between the plates if initial force was F .also find the new electric feild ,potential difference ,and electric potential energy(if initials are
Answer» a parralel plate capacitor ,capacitance C is charged with a battery of v volts.a dielectric slab of di electric constant K is placed between the plates to fully occupy space .the battery remains connected.what will be new electrosatic force of attraction between the plates if initial force was F .also find the new electric feild ,potential difference ,and electric potential energy(if initials are

Discussion

3.	The resistance of a galvanometer is 10 Ω. It gives full-scale deflection when 1 mA current is passed. The resistance connected in series for converting it into a voltmeter of 2.5 V will be
Answer» The resistance of a galvanometer is $10 Ω$ . It gives full-scale deflection when $1 m A$ current is passed. The resistance connected in series for converting it into a voltmeter of $2.5 V$ will be

Discussion

4.	The magnetic bearing of a line AB was N59∘30′W in the year 1967, when the declination was 4∘10E. If the present declination is 3∘W, the whole circle bearing of the line is
Answer» The magnetic bearing of a line AB was $N 59^{\circ} 30^{'} W$ in the year 1967, when the declination was $4^{\circ} 10 E$ . If the present declination is $3^{\circ} W$ , the whole circle bearing of the line is

Discussion

5.	What are residual forces?
Answer» What are residual forces?

Discussion

6.	If speed V, area A and force F are chosen as fundamental units, then the dimension of Young's modulus will be :
Answer» If speed $V$ , area $A$ and force $F$ are chosen as fundamental units, then the dimension of Young's modulus will be :

Discussion

7.	A wheel having a radius of 10 cm is coupled by a belt to another wheel of radius 30 cm. If the 1st wheel increases its angular speed from rest at a uniform rate of 1.57 rad/s2, the time for the second wheel to reach a rotational speed of 100 rev/min is (Assume that the belt does not slip)
Answer» A wheel having a radius of $10 cm$ is coupled by a belt to another wheel of radius $30 cm$ . If the 1st wheel increases its angular speed from rest at a uniform rate of $1.57 {rad/s}^{2}$ , the time for the second wheel to reach a rotational speed of $100 rev/min$ is (Assume that the belt does not slip)

Discussion

8.	A cylindrical vessel of diameter 12 cm contains 800π cm3 of water. A cylindrical glass piece of diameter 8.0 cm and height 8.0 cm is placed in the vessel. If the bottom of the vessel under the glass piece is seen by the paraxial rays (see figure), locate its image. The index of refraction of glass is 1.50 and that of water is 1.33.
Answer» A cylindrical vessel of diameter 12 cm contains $800 π c m^{3}$ of water. A cylindrical glass piece of diameter 8.0 cm and height 8.0 cm is placed in the vessel. If the bottom of the vessel under the glass piece is seen by the paraxial rays (see figure), locate its image. The index of refraction of glass is 1.50 and that of water is 1.33.

8.

A cylindrical vessel of diameter 12 cm contains 800π cm3 of water. A cylindrical glass piece of diameter 8.0 cm and height 8.0 cm is placed in the vessel. If the bottom of the vessel under the glass piece is seen by the paraxial rays (see figure), locate its image. The index of refraction of glass is 1.50 and that of water is 1.33.

Answer»

A cylindrical vessel of diameter 12 cm contains $800 π c m^{3}$ of water. A cylindrical glass piece of diameter 8.0 cm and height 8.0 cm is placed in the vessel. If the bottom of the vessel under the glass piece is seen by the paraxial rays (see figure), locate its image. The index of refraction of glass is 1.50 and that of water is 1.33.

Discussion

9.	For an amplitude modulated wave, the maximum amplitude is foundto be 10V while the minimum amplitude is found to be 2V. Determinethe modulation index, μ.
Answer» For an amplitude modulated wave, the maximum amplitude is foundto be 10V while the minimum amplitude is found to be 2V. Determinethe modulation index, μ.

Discussion

10.	37. The acc(a) . Versus time(t) graph of a particle moving in a straight line is shown in fig. If initial velocity of a particle is zero then vel. At t=2sec
Answer» 37. The acc(a) . Versus time(t) graph of a particle moving in a straight line is shown in fig. If initial velocity of a particle is zero then vel. At t=2sec

Discussion

11.	Two masses 2m and m are whirled in a horizontal circle. The radius of path of 2m is r and of m is 2r as shown in figure. Then the ratio of tension of two strings are 1. 2:1 2.1:1 3.3:4 4.4:3
Answer» Two masses 2m and m are whirled in a horizontal circle. The radius of path of 2m is r and of m is 2r as shown in figure. Then the ratio of tension of two strings are 1. 2:1 2.1:1 3.3:4 4.4:3

Discussion

12.	51) If an electric field is given by 10i+3j+4kcalculate the electric flux through a surface of area10 units lying in yz plane(2) 10 units(1) 100 units(4) 40 units(3) 30 units
Answer» 51) If an electric field is given by 10i+3j+4kcalculate the electric flux through a surface of area10 units lying in yz plane(2) 10 units(1) 100 units(4) 40 units(3) 30 units

Discussion

13.	The ratio of maximum and minimum intensities of two sources is 4:1. The ratio of their amplitudes is-
Answer» The ratio of maximum and minimum intensities of two sources is $4 : 1.$ The ratio of their amplitudes is-

Discussion

14.	If the function f(x)=4x3−6x2+60 is decreasing, then[1 mark]
Answer» If the function $f (x) = 4 x^{3} - 6 x^{2} + 60$ is decreasing, then [1 mark]

Discussion

15.	A particle of mass 13 kg moves with 5 m/s in y−z plane along the path 5y=12z+60. Here y and z are in metre. Magnitude of angular momentum of the particle about origin (in kg m2s−1), when the particle is at z=10 m, is [Your answer must be an integer]
Answer» A particle of mass $13 kg$ moves with $5 m/s$ in $y - z$ plane along the path $5 y = 12 z + 60$ . Here $y$ and $z$ are in metre. Magnitude of angular momentum of the particle about origin (in ${kg m}^{2} s^{- 1}$ ), when the particle is at $z = 10 m$ , is [Your answer must be an integer]

Discussion

16.	Two point charges of 3.2×10−19 C and −3.2×10−19 C are seperated from each other by 2.4×10−10 m. The dipole is situated in a uniform electric field of intensity 4×105 V/m. The work done in rotating the dipole by 180∘ is p×10−24 J. Find the value of p.
Answer» Two point charges of $3.2 \times 10^{- 19} C$ and $- 3.2 \times 10^{- 19} C$ are seperated from each other by $2.4 \times 10^{- 10} m$ . The dipole is situated in a uniform electric field of intensity $4 \times 10^{5} V/m$ . The work done in rotating the dipole by $180^{\circ}$ is $p \times 10^{- 24} J$ . Find the value of $p$ .

Discussion

17.	A body of mass 0.5 kg travels in a straight line with velocity v =a x3/2 where a = 5 m¯¹/2 s¯¹. What is the work done by the net force during its displacement from x = 0 to x = 2 m ?
Answer» A body of mass 0.5 kg travels in a straight line with velocity v =a x3/2 where a = 5 m¯¹/2 s¯¹. What is the work done by the net force during its displacement from x = 0 to x = 2 m ?

Discussion

18.	Passing through (0, 0) with slope m.
Answer» Passing through (0, 0) with slope m.

Discussion

19.	A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature 120∘ C , then
Answer» A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature $120^{\circ} C$ , then

19.

A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature 120∘ C , then

Answer»

A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature $120^{\circ} C$ , then

Discussion

20.	2NOBr(g)2NObromide (NOBr) is 40% dissociate at certaintemperature and a total pressure of 0.3 atm. Kfor the reaction:2NO(g) + Br,(g)2NOBr(g) is :-(g) + Br(g). If nitrosyl(1) 45(3) 0.022(2) 25(4) 0.25
Answer» 2NOBr(g)2NObromide (NOBr) is 40% dissociate at certaintemperature and a total pressure of 0.3 atm. Kfor the reaction:2NO(g) + Br,(g)2NOBr(g) is :-(g) + Br(g). If nitrosyl(1) 45(3) 0.022(2) 25(4) 0.25

Discussion

21.	When a metal surface is illuminated by light of wavelengths 400 nm and 250 nm the maximum velocities of the photoelectrons ejected are v and 2v respectively. The work function of the metal is (h = Planck's constant,c = velocity of light in air)
Answer» When a metal surface is illuminated by light of wavelengths 400 nm and 250 nm the maximum velocities of the photoelectrons ejected are v and 2v respectively. The work function of the metal is (h = Planck's constant, c = velocity of light in air)

Discussion

22.	The electric field due to charged circular arc shown in the figure at centre O is
Answer» The electric field due to charged circular arc shown in the figure at centre O is

Discussion

23.	The rope shown in figure wound around a cylinder of mass 4 kg and moment of inertia 0.02 kg m2 about the cylinder axis. If the cylinder rolls without slipping on a frictionless floor, then the linear acceleration of its centre of mass is -
Answer» The rope shown in figure wound around a cylinder of mass $4 kg$ and moment of inertia $0.02 {kg m}^{2}$ about the cylinder axis. If the cylinder rolls without slipping on a frictionless floor, then the linear acceleration of its centre of mass is -

Discussion

24.	A student measures the distance traversed in free fall of a body initially at rest in a given time. He uses this data to estimate g (the acceleration due to gravity). If the maximum percentage errors in measurement of the distance and the time are e1 and e2 respectively, the percentage error in the estimation of g is
Answer» A student measures the distance traversed in free fall of a body initially at rest in a given time. He uses this data to estimate g (the acceleration due to gravity). If the maximum percentage errors in measurement of the distance and the time are $e_{1}$ and $e_{2}$ respectively, the percentage error in the estimation of $g$ is

Discussion

25.	A body travels for 15 sec starting from rest with constant acceleration. If it travels distances s1,s2 and s3 in the first five seconds, second five seconds and next five seconds respectively, the relation between s1,s2 and s3 is
Answer» A body travels for $15 s e c$ starting from rest with constant acceleration. If it travels distances $s_{1}, s_{2}$ and $s_{3}$ in the first five seconds, second five seconds and next five seconds respectively, the relation between $s_{1}, s_{2}$ and $s_{3}$ is

Discussion

26.	A stone is projected from the ground with velocity 25 m/s. Two seconds later, it just clears a wall 5 m high. The angle of projection of the stone is (g=10m/sec2)
Answer» A stone is projected from the ground with velocity 25 m/s. Two seconds later, it just clears a wall 5 m high. The angle of projection of the stone is $(g = 10 m / s e c^{2})$

Discussion

27.	Ina plane electromagnetic wave, the electric field oscillatessinusoidally at a frequency of 2.0 × 1010Hz and amplitude 48 V m−1.(a) Whatis the wavelength of the wave?(b) What is the amplitude of theoscillating magnetic field?(c) Showthat the average energy density of the Efield equals the average energydensity of the B field.[c =3 × 108m s−1.]
Answer» In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2.0 × 10¹⁰ Hz and amplitude 48 V m⁻¹. (a) What is the wavelength of the wave? (b) What is the amplitude of the oscillating magnetic field? (c) Show that the average energy density of the E field equals the average energy density of the B field. [c = 3 × 10⁸ m s⁻¹.]

27.

Ina plane electromagnetic wave, the electric field oscillatessinusoidally at a frequency of 2.0 × 1010Hz and amplitude 48 V m−1.(a) Whatis the wavelength of the wave?(b) What is the amplitude of theoscillating magnetic field?(c) Showthat the average energy density of the Efield equals the average energydensity of the B field.[c =3 × 108m s−1.]

Answer»

In
a plane electromagnetic wave, the electric field oscillates
sinusoidally at a frequency of 2.0 × 10¹⁰
Hz and amplitude 48 V m⁻¹.

(a) What
is the wavelength of the wave?

(b)
What is the amplitude of the
oscillating magnetic field?

(c) Show
that the average energy density of the E
field equals the average energy
density of the B field.
[c =
3 × 10⁸
m s⁻¹.]

Discussion

28.	Two spherical bodies A (radius 6 cm) and B (radius 18 cm) are at temperatures T1 and T2, respectively. The maximum intensity in the emission spectrum of A is at 500 nm and in that of B is at 1500 nm. Considering them to be black bodies, what will be the ratio of the rate of total energy radiated by A to that of B
Answer» Two spherical bodies A (radius 6 cm) and B (radius 18 cm) are at temperatures $T_{1}$ and $T_{2}$ , respectively. The maximum intensity in the emission spectrum of A is at 500 nm and in that of B is at 1500 nm. Considering them to be black bodies, what will be the ratio of the rate of total energy radiated by A to that of B

Discussion

29.	Four identical cells of emf E and internal resistance r are to be connected in series. Suppose if one of the cells is connected wrongly, the equivalent emf and effective internal resistance of the combination is:
Answer» Four identical cells of emf E and internal resistance r are to be connected in series. Suppose if one of the cells is connected wrongly, the equivalent emf and effective internal resistance of the combination is:

Discussion

30.	18. Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic induction at the center of the ring is
Answer» 18. Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic induction at the center of the ring is

Discussion

31.	Water is partially filled in a container as shown. Tap on the part where the pressure exerted by the water is zero.
Answer» Water is partially filled in a container as shown. Tap on the part where the pressure exerted by the water is zero.

Discussion

32.	A particle executes SHM with an angular frequency 4π rad/s. If it is at its positive extreme position initially, find the first instant when it is at a distance of 1√2 times its amplitude from the mean position in positive direction
Answer» A particle executes $SHM$ with an angular frequency $4 π rad/s$ . If it is at its positive extreme position initially, find the first instant when it is at a distance of $\frac{1}{\sqrt{2}}$ times its amplitude from the mean position in positive direction

Discussion

33.	The potential energy function U(x) of a particle moving along x direction is given by U(x)=ax2−bx. Find the equilibirum point (xe).
Answer» The potential energy function $U (x)$ of a particle moving along $x$ direction is given by $U (x) = a x^{2} - b x$ . Find the equilibirum point $(x_{e})$ .

Discussion

34.	The waveform given below when applied to the following circuit will produce which of the following output waveform? Assume ideal diode configuration and R1=R2
Answer» The waveform given below when applied to the following circuit will produce which of the following output waveform? Assume ideal diode configuration and $R_{1} = R_{2}$

Discussion

35.	Find the derivative of ax+bcx+d where a,b,c,d are fixed non-zero constants.
Answer» Find the derivative of $\frac{a x + b}{c x + d}$ where $a, b, c, d$ are fixed non-zero constants.

Discussion

36.	Find the radius of gyration of a circular ring of radius r about a line perpendicular to the plane of the ring and passing through one of its particles.
Answer» Find the radius of gyration of a circular ring of radius r about a line perpendicular to the plane of the ring and passing through one of its particles.

Discussion

37.	Four plates of equal area A are separated by equal distances d and are arranged as shown in the figure. The equivalent capacity is
Answer» Four plates of equal area A are separated by equal distances $d$ and are arranged as shown in the figure. The equivalent capacity is

Discussion

38.	What is the moment of inertia of a cylindrical shell having inner radius 2 cm and outer radius 5 cm of length 4 cm about its axis of rotation?
Answer» What is the moment of inertia of a cylindrical shell having inner radius 2 cm and outer radius 5 cm of length 4 cm about its axis of rotation?

Discussion

39.	8. Why vertical component of a projectile decreases and finally becomes zero at maximum height??
Answer» 8. Why vertical component of a projectile decreases and finally becomes zero at maximum height??

Discussion

40.	Figure shows a square loop ABCD with edge length a. The resistance of the wire ABC is r and that of ADC is 2r. The value of magnetic field at the center of the loop, assuming uniform wire is
Answer» Figure shows a square loop $ABCD$ with edge length $a$ . The resistance of the wire $ABC$ is $r$ and that of $ADC$ is $2 r$ . The value of magnetic field at the center of the loop, assuming uniform wire is

Discussion

41.	45.If the deBroglie wavelength of a particle of mass 1g is 6.626×10^{-9}m then its KE is-
Answer» 45.If the deBroglie wavelength of a particle of mass 1g is 6.626×10^{-9}m then its KE is-

Discussion

42.	MABCD]+ is optically inactive how??
Answer» MABCD]+ is optically inactive how??

Discussion

43.	The surface charge density of a ring of radius a and thickness d is σ as shown in figure. If rotates with a frequency f about an axis passing through its centre and perpendicular to its plane. Assume that charge is present only on the outer surface. The magnetic field induction at a point P on axis at a very large distance L from its centre will be:[Assume that (d<<a)]
Answer» The surface charge density of a ring of radius $a$ and thickness $d$ is $σ$ as shown in figure. If rotates with a frequency $f$ about an axis passing through its centre and perpendicular to its plane. Assume that charge is present only on the outer surface. The magnetic field induction at a point $P$ on axis at a very large distance $L$ from its centre will be: $[$ Assume that $(d << a)]$

Discussion

44.	If collision occurs between two elastic bodies does their kinetic energy decrease during the time of collision
Answer» If collision occurs between two elastic bodies does their kinetic energy decrease during the time of collision

Discussion

45.	The electric potential at any point (x,y,z) is given as V=(2y3) volt . The electric field at point (2,1,0) is((x,y,z) are in metre)
Answer» The electric potential at any point $(x, y, z)$ is given as $V = (2 y^{3}) volt$ . The electric field at point $(2, 1, 0)$ is (( $x, y, z)$ are in metre)

Discussion

46.	A taxi leaves the station X for station Y every 10 minutes. Simultaneously, a taxi leaves the station Y alsofor station X every 10 minutes. The taxis move at the same constant speed and go from X to Y or vice-versa in 2 hours. How many taxis coming from the other side will each taxi meet enroute from Y to X1) 10(2) 11(3) 12(4)23
Answer» A taxi leaves the station X for station Y every 10 minutes. Simultaneously, a taxi leaves the station Y alsofor station X every 10 minutes. The taxis move at the same constant speed and go from X to Y or vice-versa in 2 hours. How many taxis coming from the other side will each taxi meet enroute from Y to X1) 10(2) 11(3) 12(4)23

Discussion

47.	71. Momentum of a particle increases by 50% find %change in kinetic energy of particle
Answer» 71. Momentum of a particle increases by 50% find %change in kinetic energy of particle

Discussion

48.	For a particle of mass m enclosed in a one - dimensional box of length L, the de - Broglie concept would lead to stationary waves, with nodes at the two ends, The energy value allowed for such a system will be?
Answer» For a particle of mass m enclosed in a one - dimensional box of length L, the de - Broglie concept would lead to stationary waves, with nodes at the two ends, The energy value allowed for such a system will be?

Discussion

49.	A bag (mass M) hangs by a long thread and a bullet (mass m) comes horizontally with velocity v and gets caught in the bag. Then for the combined (bag + bullet) system
Answer» A bag (mass M) hangs by a long thread and a bullet (mass m) comes horizontally with velocity v and gets caught in the bag. Then for the combined (bag + bullet) system

Discussion

50.	A system consists of two cubes of masses m1 and m2 respectively connected by a spring of force constant k. The force (F) that should be applied to the upper cube for which the lower one just lifts after the force is removed, is
Answer» A system consists of two cubes of masses m₁ and m₂ respectively connected by a spring of force constant k. The force (F) that should be applied to the upper cube for which the lower one just lifts after the force is removed, is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A container is filled with liquid upto height H.There is a hole in the base of container whose area of cross section is A_1 \{ A_2 is area of cross section of container \}.The time in which first half of the liquid escapes from the container \{ A_1

The resistance of a galvanometer is 10 Ω. It gives full-scale deflection when 1 mA current is passed. The resistance connected in series for converting it into a voltmeter of 2.5 V will be

The magnetic bearing of a line AB was N59∘30′W in the year 1967, when the declination was 4∘10E. If the present declination is 3∘W, the whole circle bearing of the line is

What are residual forces?

If speed V, area A and force F are chosen as fundamental units, then the dimension of Young's modulus will be :

A wheel having a radius of 10 cm is coupled by a belt to another wheel of radius 30 cm. If the 1st wheel increases its angular speed from rest at a uniform rate of 1.57 rad/s2, the time for the second wheel to reach a rotational speed of 100 rev/min is (Assume that the belt does not slip)

For an amplitude modulated wave, the maximum amplitude is foundto be 10V while the minimum amplitude is found to be 2V. Determinethe modulation index, μ.

37. The acc(a) . Versus time(t) graph of a particle moving in a straight line is shown in fig. If initial velocity of a particle is zero then vel. At t=2sec

Two masses 2m and m are whirled in a horizontal circle. The radius of path of 2m is r and of m is 2r as shown in figure. Then the ratio of tension of two strings are 1. 2:1 2.1:1 3.3:4 4.4:3

51) If an electric field is given by 10i+3j+4kcalculate the electric flux through a surface of area10 units lying in yz plane(2) 10 units(1) 100 units(4) 40 units(3) 30 units

The ratio of maximum and minimum intensities of two sources is 4:1. The ratio of their amplitudes is-

If the function f(x)=4x3−6x2+60 is decreasing, then[1 mark]

A particle of mass 13 kg moves with 5 m/s in y−z plane along the path 5y=12z+60. Here y and z are in metre. Magnitude of angular momentum of the particle about origin (in kg m2s−1), when the particle is at z=10 m, is [Your answer must be an integer]

Two point charges of 3.2×10−19 C and −3.2×10−19 C are seperated from each other by 2.4×10−10 m. The dipole is situated in a uniform electric field of intensity 4×105 V/m. The work done in rotating the dipole by 180∘ is p×10−24 J. Find the value of p.

A body of mass 0.5 kg travels in a straight line with velocity v =a x3/2 where a = 5 m¯¹/2 s¯¹. What is the work done by the net force during its displacement from x = 0 to x = 2 m ?

Passing through (0, 0) with slope m.

A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature 120∘ C , then

2NOBr(g)2NObromide (NOBr) is 40% dissociate at certaintemperature and a total pressure of 0.3 atm. Kfor the reaction:2NO(g) + Br,(g)2NOBr(g) is :-(g) + Br(g). If nitrosyl(1) 45(3) 0.022(2) 25(4) 0.25

When a metal surface is illuminated by light of wavelengths 400 nm and 250 nm the maximum velocities of the photoelectrons ejected are v and 2v respectively. The work function of the metal is (h = Planck's constant,c = velocity of light in air)

The electric field due to charged circular arc shown in the figure at centre O is

The rope shown in figure wound around a cylinder of mass 4 kg and moment of inertia 0.02 kg m2 about the cylinder axis. If the cylinder rolls without slipping on a frictionless floor, then the linear acceleration of its centre of mass is -

A body travels for 15 sec starting from rest with constant acceleration. If it travels distances s1,s2 and s3 in the first five seconds, second five seconds and next five seconds respectively, the relation between s1,s2 and s3 is

A stone is projected from the ground with velocity 25 m/s. Two seconds later, it just clears a wall 5 m high. The angle of projection of the stone is (g=10m/sec2)

Four identical cells of emf E and internal resistance r are to be connected in series. Suppose if one of the cells is connected wrongly, the equivalent emf and effective internal resistance of the combination is:

18. Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic induction at the center of the ring is

Water is partially filled in a container as shown. Tap on the part where the pressure exerted by the water is zero.

A particle executes SHM with an angular frequency 4π rad/s. If it is at its positive extreme position initially, find the first instant when it is at a distance of 1√2 times its amplitude from the mean position in positive direction

The potential energy function U(x) of a particle moving along x direction is given by U(x)=ax2−bx. Find the equilibirum point (xe).

The waveform given below when applied to the following circuit will produce which of the following output waveform? Assume ideal diode configuration and R1=R2

Find the derivative of ax+bcx+d where a,b,c,d are fixed non-zero constants.

Find the radius of gyration of a circular ring of radius r about a line perpendicular to the plane of the ring and passing through one of its particles.

Four plates of equal area A are separated by equal distances d and are arranged as shown in the figure. The equivalent capacity is

What is the moment of inertia of a cylindrical shell having inner radius 2 cm and outer radius 5 cm of length 4 cm about its axis of rotation?

8. Why vertical component of a projectile decreases and finally becomes zero at maximum height??

Figure shows a square loop ABCD with edge length a. The resistance of the wire ABC is r and that of ADC is 2r. The value of magnetic field at the center of the loop, assuming uniform wire is

45.If the deBroglie wavelength of a particle of mass 1g is 6.626×10^{-9}m then its KE is-

MABCD]+ is optically inactive how??

If collision occurs between two elastic bodies does their kinetic energy decrease during the time of collision

The electric potential at any point (x,y,z) is given as V=(2y3) volt . The electric field at point (2,1,0) is((x,y,z) are in metre)

71. Momentum of a particle increases by 50% find %change in kinetic energy of particle

For a particle of mass m enclosed in a one - dimensional box of length L, the de - Broglie concept would lead to stationary waves, with nodes at the two ends, The energy value allowed for such a system will be?

A bag (mass M) hangs by a long thread and a bullet (mass m) comes horizontally with velocity v and gets caught in the bag. Then for the combined (bag + bullet) system

A system consists of two cubes of masses m1 and m2 respectively connected by a spring of force constant k. The force (F) that should be applied to the upper cube for which the lower one just lifts after the force is removed, is