50278 + Interview Questions in Physics

1.	The diagram shows the path of four α-particles of the same energy being scattered by the nucleus of an atom simultaneously. Which path is not physically possible?
Answer» The diagram shows the path of four $α$ -particles of the same energy being scattered by the nucleus of an atom simultaneously. Which path is not physically possible?

Discussion

2.	Calculate the potential difference and the energy stored in the capacitor C2 in the circuit shown in the figure. Given potential at A in 90 V, C1=20μF, C2=30μF and C3=15μF.
Answer» Calculate the potential difference and the energy stored in the capacitor $C_{2}$ in the circuit shown in the figure. Given potential at A in 90 V, $C_{1} = 20 μ F, C_{2} = 30 μ F$ and $C_{3} = 15 μ F$ .

Discussion

3.	What is the difference between stable,unstable and neutral equilibrium? what is equilibrium?
Answer» What is the difference between stable,unstable and neutral equilibrium? what is equilibrium?

Discussion

4.	If a body is thrown within a velocity v which is greater than orbital velocity but less than the escape velocity , then what will happen to the body?
Answer» If a body is thrown within a velocity v which is greater than orbital velocity but less than the escape velocity , then what will happen to the body?

Discussion

5.	A proton of mass 1.6×10−27 kg goes round in a circular orbit of radius 0.10 m under a centripetal force of 4×10−13N. then the frequency of revolution of the proton is about
Answer» A proton of mass $1.6 \times 10^{- 27}$ kg goes round in a circular orbit of radius 0.10 m under a centripetal force of $4 \times 10^{- 13} N$ . then the frequency of revolution of the proton is about

Discussion

6.	For the wave described in Exercise 15.8, plot the displacement (y) versus (t) graphs for x = 0, 2 and 4 cm. What are the shapes of these graphs? In which aspects does the oscillatory motion in travelling wave differ from one point to another: amplitude, frequency or phase ?
Answer» For the wave described in Exercise 15.8, plot the displacement (y) versus (t) graphs for x = 0, 2 and 4 cm. What are the shapes of these graphs? In which aspects does the oscillatory motion in travelling wave differ from one point to another: amplitude, frequency or phase ?

Discussion

7.	A cubical block is floating in a liquid with half of its volume immersed in the liquid. When the whole system accelerates upwards with acceleration of g/3, the fraction of volume immersed in the liquid will be
Answer» A cubical block is floating in a liquid with half of its volume immersed in the liquid. When the whole system accelerates upwards with acceleration of g/3, the fraction of volume immersed in the liquid will be

7.

A cubical block is floating in a liquid with half of its volume immersed in the liquid. When the whole system accelerates upwards with acceleration of g/3, the fraction of volume immersed in the liquid will be

Answer»

A cubical block is floating in a liquid with half of its volume immersed in the liquid. When the whole system accelerates upwards with acceleration of g/3, the fraction of volume immersed in the liquid will be

Discussion

8.	The stick applies a force of 2 N on the ring(R=0.5 m) and the ring rolls without slipping on the ground as shown in figure. The coefficient of friction between the stick and the ring is
Answer» The stick applies a force of $2 N$ on the ring $(R = 0.5 m)$ and the ring rolls without slipping on the ground as shown in figure. The coefficient of friction between the stick and the ring is

Discussion

9.	A circuit consisting of a capacitor and a coil in series is connected to the mains. Varying the capacitance of the capacitor, the heat power generated in the coil was increased 1.7 times. If the value of cosϕ changes by t%, then what is the value of t10 to the nearest integer ?
Answer» A circuit consisting of a capacitor and a coil in series is connected to the mains. Varying the capacitance of the capacitor, the heat power generated in the coil was increased $1.7$ times. If the value of $cos ϕ$ changes by $t %$ , then what is the value of $\frac{t}{10}$ to the nearest integer ?

Discussion

10.	The world's largest ball of string is about 2 m in radius. To the nearest order of magnitude what is the total length L of the string in the ball? Amswer is , L=103km
Answer» The world's largest ball of string is about 2 m in radius. To the nearest order of magnitude what is the total length L of the string in the ball? Amswer is , L=10³km

10.

The world's largest ball of string is about 2 m in radius. To the nearest order of magnitude what is the total length L of the string in the ball? Amswer is , L=103km

Answer»

The world's largest ball of string is about 2 m in radius. To the nearest order of magnitude what is the total length L of the string in the ball?

Amswer is , L=10³km

Discussion

11.	A body is in motion along the positive x - axis, according to the relation x=asin2ωt. Then, the variation of its kinetic energy K with time t may be represented by
Answer» A body is in motion along the positive $x$ - axis, according to the relation $x = a {sin}^{2} ω t$ . Then, the variation of its kinetic energy $K$ with time $t$ may be represented by

Discussion

12.	A particle starts from rest at t=0 and moves in a straight line with acceleration as shown in the following figure. The velocity of the particle at t=3 seconds is
Answer» A particle starts from rest at $t = 0$ and moves in a straight line with acceleration as shown in the following figure. The velocity of the particle at $t = 3$ seconds is

Discussion

13.	Prove that the numerical value of the ratio of displacement to distance is ≤1.
Answer» Prove that the numerical value of the ratio of displacement to distance is ≤1.

Discussion

14.	the amount of heat energy required to raise the temperature of 1g of He at NTP from T1 K to T2 K is ?
Answer» the amount of heat energy required to raise the temperature of 1g of He at NTP from T1 K to T2 K is ?

Discussion

15.	Two particles A and B are moving in a uniform circular motion in concentric circles of radius rA and rB with speed vA and vB respectively. The time period of rotation is the same. The ratio of angular speed of A to that of B will be
Answer» Two particles $A$ and $B$ are moving in a uniform circular motion in concentric circles of radius $r_{A}$ and $r_{B}$ with speed $v_{A}$ and $v_{B}$ respectively. The time period of rotation is the same. The ratio of angular speed of A to that of B will be

Discussion

16.	An electron crosses the axis of the current carrying loop with velocity, v=2×104 m/s at an angle, θ=60∘ as shown in the figure. If the force acting on the electron when it crosses the axis is, F=5×10−20 N. Then find the current through the loop.[Radius of the loop, R=5 cm]
Answer» An electron crosses the axis of the current carrying loop with velocity, $v = 2 \times 10^{4} m / s$ at an angle, $θ = 60^{\circ}$ as shown in the figure. If the force acting on the electron when it crosses the axis is, $F = 5 \times 10^{- 20}$ $N$ . Then find the current through the loop. $[$ Radius of the loop, $R = 5 cm]$

Discussion

17.	An infinite wire , placed along z axis has current I1 in positive z direction . A conducting rod placed parallel to y axis has current I2 in positive y direction. The ends of rod subtens +30 and -60(degrees) at the origin with positive x direction.The rod is distance a from the origin . Find net force on the rod.
Answer» An infinite wire , placed along z axis has current I1 in positive z direction . A conducting rod placed parallel to y axis has current I2 in positive y direction. The ends of rod subtens +30 and -60(degrees) at the origin with positive x direction.The rod is distance a from the origin . Find net force on the rod.

Discussion

18.	1.5 mW of 4000 Å light is directed at a photoelectric cell. If 0.10 per cent of the incident photons produce, photoelectrons, find the current in the cell.[Given: h = 6.6 × 10–34 J-s, c = 3 × 108 m/s and e = 1.6 × 10–19 C]Options: 0.12 μA 0.24 μA 0.36 μA0.48 μA
Answer» 1.5 mW of 4000 Å light is directed at a photoelectric cell. If 0.10 per cent of the incident photons produce, photoelectrons, find the current in the cell. [Given: h = 6.6 × 10–34 J-s, c = 3 × 108 m/s and e = 1.6 × 10–19 C] Options: 0.12 μA 0.24 μA 0.36 μA 0.48 μA

Discussion

19.	What is the minimum energy required to launch a satellite of mass m from the surface of a planet of mass M and radius R in a circular orbit at an altitude of 2R ?
Answer» What is the minimum energy required to launch a satellite of mass m from the surface of a planet of mass M and radius R in a circular orbit at an altitude of 2R ?

Discussion

20.	Obtainthe formula for the electric field due to a long thin wire of uniformlinear charge density λwithout using Gauss’s law. [Hint:Use Coulomb’s law directly andevaluate the necessary integral.]
Answer» Obtain the formula for the electric field due to a long thin wire of uniform linear charge density λ without using Gauss’s law. [Hint: Use Coulomb’s law directly and evaluate the necessary integral.]

Discussion

21.	Two tuning forks produce 4 beats per second when they are sounded together. Now, both the forks are moved towards the observer at same speed (u). The beat frequency now becomes 5 Hz. If the observer also begins to run with speed u towards both the forks, what beat frequency will he hear now?
Answer» Two tuning forks produce $4$ beats per second when they are sounded together. Now, both the forks are moved towards the observer at same speed $(u)$ . The beat frequency now becomes $5 Hz$ . If the observer also begins to run with speed $u$ towards both the forks, what beat frequency will he hear now?

Discussion

22.	Three identical dipoles are arranged as shown below. What will be the net electric field at P? (K=14πϵ0)
Answer» Three identical dipoles are arranged as shown below. What will be the net electric field at P? $(K = \frac{1}{4 π ϵ_{0}})$

Discussion

23.	A simple pendulum with iron bob has a time period T. The bob is now immersed in a non-viscous liquid and oscillated. If the density of liquid is1/12 th that of iron, then new time period will be
Answer» A simple pendulum with iron bob has a time period T. The bob is now immersed in a non-viscous liquid and oscillated. If the density of liquid is1/12 th that of iron, then new time period will be

Discussion

24.	A particle starts from the origin at t=0 with an initial velocity of 3.0^i m/s and moves in the x−y plane with a constant acceleration (6.0^i+4.0^j) m/s2. The x−coordinate of the particle at the instant when its y−coordinate is 32 m is D meters. The value of D is:
Answer» A particle starts from the origin at $t = 0$ with an initial velocity of $3.0^i m/s$ and moves in the $x - y$ plane with a constant acceleration $(6.0^i + 4.0^j) {m/s}^{2}$ . The $x -$ coordinate of the particle at the instant when its $y -$ coordinate is $32 m$ is $D meters$ . The value of $D$ is:

Discussion

25.	Two charged balls are attached by silk threads of length l to the same point. Their velocity is K√x, where K is a constant and x is the distance between the balls, x is very small in comparison to l. The rate of leakage of charge in 10−5 C/s is (take lmg=10, K=4√2)
Answer» Two charged balls are attached by silk threads of length $l$ to the same point. Their velocity is $\frac{K}{\sqrt{x}}$ , where $K$ is a constant and $x$ is the distance between the balls, $x$ is very small in comparison to $l$ . The rate of leakage of charge in $10^{- 5} C/s$ is (take $\frac{l}{m g} = 10, K = 4 \sqrt{2}$ )

Discussion

26.	Two equal resistance, when connected in series to a battery, consume electric power of 60 W. If these resistances are now connected in parallel combination to the same battery, the electric power consumed will be:
Answer» Two equal resistance, when connected in series to a battery, consume electric power of $60 W$ . If these resistances are now connected in parallel combination to the same battery, the electric power consumed will be:

Discussion

27.	15. The rms value of current for an a.c. current given by I= 4+3cos(ω t) is(1) 5A(2) 4.53 A(3) 4.17 A(4) 4.23 A
Answer» 15. The rms value of current for an a.c. current given by I= 4+3cos(ω t) is(1) 5A(2) 4.53 A(3) 4.17 A(4) 4.23 A

Discussion

28.	Due to economic reasons, only the upper sideband of an AM wave istransmitted, but at the receiving station, there is a facility forgenerating the carrier. Show that if a device is available which canmultiply two signals, then it is possible to recover the modulatingsignal at the receiver station.
Answer» Due to economic reasons, only the upper sideband of an AM wave istransmitted, but at the receiving station, there is a facility forgenerating the carrier. Show that if a device is available which canmultiply two signals, then it is possible to recover the modulatingsignal at the receiver station.

Discussion

29.	Two particles A and B start moving with velocities 20m/s and 302m/s along x axis and at a angle 45^° in x axis respectively in x y axis from origin. The relativevelocity of B w.r.t A
Answer» Two particles A and B start moving with velocities 20m/s and 302m/s along x axis and at a angle 45^° in x axis respectively in x y axis from origin. The relativevelocity of B w.r.t A

Discussion

30.	In a snooker game, a player strikes the white ball and imparts a velocity of 4 m/s. The white ball strikes another red ball which was initially at rest. Assuming that the collision of the balls is perfectly elastic and masses of both balls are the same, what are the velocities of the red and white balls respectively?
Answer» In a snooker game, a player strikes the white ball and imparts a velocity of $4 m/s$ . The white ball strikes another red ball which was initially at rest. Assuming that the collision of the balls is perfectly elastic and masses of both balls are the same, what are the velocities of the red and white balls respectively?

Discussion

31.	A particle is projected vertically upwards with some speed,the dis†an ce covered by it in its 3rd second of motion is equal to the dis†an ce covered by it in its 8th second of motion then the time of ascent is?
Answer» A particle is projected vertically upwards with some speed,the dis†an ce covered by it in its 3rd second of motion is equal to the dis†an ce covered by it in its 8th second of motion then the time of ascent is?

Discussion

32.	integration of 2x*4pix^2dx
Answer» integration of 2x*4pix^2dx

Discussion

33.	A force F is acting on a body and its component along x-axis is 60 N. The Force F is inclined at an angle 30∘ as shown. Determine F.
Answer» A force F is acting on a body and its component along x-axis is 60 N. The Force F is inclined at an angle $30^{\circ}$ as shown. Determine F.

Discussion

34.	Full explanation of weak nuclear force and strong nuclear force.
Answer» Full explanation of weak nuclear force and strong nuclear force.

Discussion

35.	THE WAVELENGTH OF ELECTRON IN TWO ORBITS IS 2:5. THE RATIO OF KINETIC ENERGY OF ELECTRON WILL BE
Answer» THE WAVELENGTH OF ELECTRON IN TWO ORBITS IS 2:5. THE RATIO OF KINETIC ENERGY OF ELECTRON WILL BE

Discussion

36.	If a direct current of 3 A is superimposed on an alternating current i=4√2sinωt A, flowing through a wire, what is the average value of current in one complete cycle ?
Answer» If a direct current of $3 A$ is superimposed on an alternating current $i = 4 \sqrt{2} sin ω t A$ , flowing through a wire, what is the average value of current in one complete cycle ?

Discussion

37.	Sinusoidal progressive wave of amplitude 10 cm is to be sent along a string that has linear mass density of 4×10–2 kg/m and a tension of 100 N. The source can deliver a maximum average power of 40 W. What is the maximum frequency (in Hz) at which source can operate? Take π2=10
Answer» Sinusoidal progressive wave of amplitude $10 cm$ is to be sent along a string that has linear mass density of $4 \times 10^{- 2} kg/m$ and a tension of $100 N$ . The source can deliver a maximum average power of $40 W$ . What is the maximum frequency (in Hz) at which source can operate? Take $π^{2} = 10$

Discussion

38.	The velocity at the maximum height of a projectile is half of its initial velocity u. Its range on the horizontal plane is
Answer» The velocity at the maximum height of a projectile is half of its initial velocity $u$ . Its range on the horizontal plane is

Discussion

39.	What are the equations of motion
Answer» What are the equations of motion

Discussion

40.	A wooden cube of length l and density sigma floats in the liquid of density p. If the liquid is then moved with an acceleration a in the horizontal direction then the net hydrostatic force acting on the cube in steady state is
Answer» A wooden cube of length l and density sigma floats in the liquid of density p. If the liquid is then moved with an acceleration a in the horizontal direction then the net hydrostatic force acting on the cube in steady state is

Discussion

41.	A resistor of R=6 Ω an inductor of L=1 H and a capacitor of C=17.36 μF are connected in series with an AC source. Find the quality factor.
Answer» A resistor of $R = 6 Ω$ an inductor of $L = 1 H$ and a capacitor of $C = 17.36 μ F$ are connected in series with an $A C$ source. Find the quality factor.

Discussion

42.	A steel flat plate of a rectangular section of size 70mm×8mm is connected to a gusset plate by three bolts each having a shear capacity of 30kN. If allowable tensile stress in flat is 160Mpa, the maximum tension that can be applied to flat plate is :
Answer» A steel flat plate of a rectangular section of size $70 m m \times 8 m m$ is connected to a gusset plate by three bolts each having a shear capacity of $30 k N$ . If allowable tensile stress in flat is $160 M p a$ , the maximum tension that can be applied to flat plate is :

Discussion

43.	Mass m of a liquid A is kept in a cup at a temperature of 90∘C. When placed in a room having temperature of 20∘C, it takes 5 min for the temperature of the liquid to drop to 30∘C. Another liquid B having nearly the same density as A and of mass m, kept in another identical cup at 50∘C takes 5 min for its temperature to fall to 30∘C when placed in a room having temperature 20∘C. If the two liquids at 90∘C and 50∘C are mixed in a calorimeter where no heat is allowed to leak, find the final temperature of the mixture. Assume that Newton's law of cooling is applicable for the given temperature ranges.
Answer» Mass $m$ of a liquid $A$ is kept in a cup at a temperature of $90^{\circ} C$ . When placed in a room having temperature of $20^{\circ} C$ , it takes $5 min$ for the temperature of the liquid to drop to $30^{\circ} C$ . Another liquid $B$ having nearly the same density as $A$ and of mass $m$ , kept in another identical cup at $50^{\circ} C$ takes $5 min$ for its temperature to fall to $30^{\circ} C$ when placed in a room having temperature $20^{\circ} C$ . If the two liquids at $90^{\circ} C$ and $50^{\circ} C$ are mixed in a calorimeter where no heat is allowed to leak, find the final temperature of the mixture. Assume that Newton's law of cooling is applicable for the given temperature ranges.

Discussion

44.	Two identical cylinders contain helium at 2.5 atm and argon at 1 atm respectively. If both the gases are filled in one of the cylinders, the pressure would be
Answer» Two identical cylinders contain helium at $2.5 a t m$ and argon at $1 a t m$ respectively. If both the gases are filled in one of the cylinders, the pressure would be

Discussion

45.	24. A man can go downstream 20km in 2 hours and upstream 4km in 2 hours .find the speed of current
Answer» 24. A man can go downstream 20km in 2 hours and upstream 4km in 2 hours .find the speed of current

Discussion

46.	A continuous time signal x(t) is defined as x(t) = 2 + cos(50πt) is sampled with sampling interval ts=0.025 sec and passed through an ideal low pass filter whose frequency response is as shown in figure below The spectrum of output will be
Answer» A continuous time signal x(t) is defined as x(t) = 2 + cos $(50 π t)$ is sampled with sampling interval $t_{s} = 0.025$ sec and passed through an ideal low pass filter whose frequency response is as shown in figure below The spectrum of output will be

Discussion

47.	If the momentum of a body increases by 40% then find % change in kinetic energy ''K = p²/2m' ?
Answer» If the momentum of a body increases by 40% then find % change in kinetic energy ' 'K = p²/2m' ?

Discussion

48.	If α and β are the current gain in the CB and CE configurations respectively of the transistor circuit, then β−ααβ is equal to
Answer» If $α$ and $β$ are the current gain in the $C B$ and $C E$ configurations respectively of the transistor circuit, then $\frac{β - α}{α β}$ is equal to

Discussion

49.	What is surface energy?what is the reason that surface energy is reduced when it adsorbs?
Answer» What is surface energy?what is the reason that surface energy is reduced when it adsorbs?

Discussion

50.	The kinetic energy and potential energy of a particle executing simple harmonic motion will be equal, when displacement (amplitude = a) is
Answer» The kinetic energy and potential energy of a particle executing simple harmonic motion will be equal, when displacement (amplitude = a) is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The diagram shows the path of four α-particles of the same energy being scattered by the nucleus of an atom simultaneously. Which path is not physically possible?

Calculate the potential difference and the energy stored in the capacitor C2 in the circuit shown in the figure. Given potential at A in 90 V, C1=20μF, C2=30μF and C3=15μF.

What is the difference between stable,unstable and neutral equilibrium? what is equilibrium?

If a body is thrown within a velocity v which is greater than orbital velocity but less than the escape velocity , then what will happen to the body?

A proton of mass 1.6×10−27 kg goes round in a circular orbit of radius 0.10 m under a centripetal force of 4×10−13N. then the frequency of revolution of the proton is about

For the wave described in Exercise 15.8, plot the displacement (y) versus (t) graphs for x = 0, 2 and 4 cm. What are the shapes of these graphs? In which aspects does the oscillatory motion in travelling wave differ from one point to another: amplitude, frequency or phase ?

A cubical block is floating in a liquid with half of its volume immersed in the liquid. When the whole system accelerates upwards with acceleration of g/3, the fraction of volume immersed in the liquid will be

The stick applies a force of 2 N on the ring(R=0.5 m) and the ring rolls without slipping on the ground as shown in figure. The coefficient of friction between the stick and the ring is

A circuit consisting of a capacitor and a coil in series is connected to the mains. Varying the capacitance of the capacitor, the heat power generated in the coil was increased 1.7 times. If the value of cosϕ changes by t%, then what is the value of t10 to the nearest integer ?

The world's largest ball of string is about 2 m in radius. To the nearest order of magnitude what is the total length L of the string in the ball? Amswer is , L=103km

A body is in motion along the positive x - axis, according to the relation x=asin2ωt. Then, the variation of its kinetic energy K with time t may be represented by

A particle starts from rest at t=0 and moves in a straight line with acceleration as shown in the following figure. The velocity of the particle at t=3 seconds is

Prove that the numerical value of the ratio of displacement to distance is ≤1.

the amount of heat energy required to raise the temperature of 1g of He at NTP from T1 K to T2 K is ?

Two particles A and B are moving in a uniform circular motion in concentric circles of radius rA and rB with speed vA and vB respectively. The time period of rotation is the same. The ratio of angular speed of A to that of B will be

An electron crosses the axis of the current carrying loop with velocity, v=2×104 m/s at an angle, θ=60∘ as shown in the figure. If the force acting on the electron when it crosses the axis is, F=5×10−20 N. Then find the current through the loop.[Radius of the loop, R=5 cm]

1.5 mW of 4000 Å light is directed at a photoelectric cell. If 0.10 per cent of the incident photons produce, photoelectrons, find the current in the cell.[Given: h = 6.6 × 10–34 J-s, c = 3 × 108 m/s and e = 1.6 × 10–19 C]Options: 0.12 μA 0.24 μA 0.36 μA0.48 μA

What is the minimum energy required to launch a satellite of mass m from the surface of a planet of mass M and radius R in a circular orbit at an altitude of 2R ?

Obtainthe formula for the electric field due to a long thin wire of uniformlinear charge density λwithout using Gauss’s law. [Hint:Use Coulomb’s law directly andevaluate the necessary integral.]

Two tuning forks produce 4 beats per second when they are sounded together. Now, both the forks are moved towards the observer at same speed (u). The beat frequency now becomes 5 Hz. If the observer also begins to run with speed u towards both the forks, what beat frequency will he hear now?

Three identical dipoles are arranged as shown below. What will be the net electric field at P? (K=14πϵ0)

A simple pendulum with iron bob has a time period T. The bob is now immersed in a non-viscous liquid and oscillated. If the density of liquid is1/12 th that of iron, then new time period will be

A particle starts from the origin at t=0 with an initial velocity of 3.0^i m/s and moves in the x−y plane with a constant acceleration (6.0^i+4.0^j) m/s2. The x−coordinate of the particle at the instant when its y−coordinate is 32 m is D meters. The value of D is:

Two charged balls are attached by silk threads of length l to the same point. Their velocity is K√x, where K is a constant and x is the distance between the balls, x is very small in comparison to l. The rate of leakage of charge in 10−5 C/s is (take lmg=10, K=4√2)

Two equal resistance, when connected in series to a battery, consume electric power of 60 W. If these resistances are now connected in parallel combination to the same battery, the electric power consumed will be:

15. The rms value of current for an a.c. current given by I= 4+3cos(ω t) is(1) 5A(2) 4.53 A(3) 4.17 A(4) 4.23 A

Due to economic reasons, only the upper sideband of an AM wave istransmitted, but at the receiving station, there is a facility forgenerating the carrier. Show that if a device is available which canmultiply two signals, then it is possible to recover the modulatingsignal at the receiver station.

Two particles A and B start moving with velocities 20m/s and 302m/s along x axis and at a angle 45^° in x axis respectively in x y axis from origin. The relativevelocity of B w.r.t A

A particle is projected vertically upwards with some speed,the dis†an ce covered by it in its 3rd second of motion is equal to the dis†an ce covered by it in its 8th second of motion then the time of ascent is?

integration of 2x*4pix^2dx

A force F is acting on a body and its component along x-axis is 60 N. The Force F is inclined at an angle 30∘ as shown. Determine F.

Full explanation of weak nuclear force and strong nuclear force.

THE WAVELENGTH OF ELECTRON IN TWO ORBITS IS 2:5. THE RATIO OF KINETIC ENERGY OF ELECTRON WILL BE

If a direct current of 3 A is superimposed on an alternating current i=4√2sinωt A, flowing through a wire, what is the average value of current in one complete cycle ?

Sinusoidal progressive wave of amplitude 10 cm is to be sent along a string that has linear mass density of 4×10–2 kg/m and a tension of 100 N. The source can deliver a maximum average power of 40 W. What is the maximum frequency (in Hz) at which source can operate? Take π2=10

The velocity at the maximum height of a projectile is half of its initial velocity u. Its range on the horizontal plane is

What are the equations of motion

A wooden cube of length l and density sigma floats in the liquid of density p. If the liquid is then moved with an acceleration a in the horizontal direction then the net hydrostatic force acting on the cube in steady state is

A resistor of R=6 Ω an inductor of L=1 H and a capacitor of C=17.36 μF are connected in series with an AC source. Find the quality factor.

A steel flat plate of a rectangular section of size 70mm×8mm is connected to a gusset plate by three bolts each having a shear capacity of 30kN. If allowable tensile stress in flat is 160Mpa, the maximum tension that can be applied to flat plate is :

Two identical cylinders contain helium at 2.5 atm and argon at 1 atm respectively. If both the gases are filled in one of the cylinders, the pressure would be

24. A man can go downstream 20km in 2 hours and upstream 4km in 2 hours .find the speed of current

A continuous time signal x(t) is defined as x(t) = 2 + cos(50πt) is sampled with sampling interval ts=0.025 sec and passed through an ideal low pass filter whose frequency response is as shown in figure below The spectrum of output will be

If the momentum of a body increases by 40% then find % change in kinetic energy ''K = p²/2m' ?

If α and β are the current gain in the CB and CE configurations respectively of the transistor circuit, then β−ααβ is equal to

What is surface energy?what is the reason that surface energy is reduced when it adsorbs?

The kinetic energy and potential energy of a particle executing simple harmonic motion will be equal, when displacement (amplitude = a) is