50278 + Interview Questions in Physics

1.	If the intermolecular forces vanish away, the volume occupied by the molecules contained in 4.5 kg water at STP will be
Answer» If the intermolecular forces vanish away, the volume occupied by the molecules contained in $4.5 kg$ water at STP will be

Discussion

2.	A clock which keeps correct time at 20∘C, is subjected to 40∘C. If coefficient of linear expansion of the pendulum is 12×10−6∘C. How much time will it gain or lose per day
Answer» A clock which keeps correct time at $20^{\circ} C$ , is subjected to $40^{\circ} C$ . If coefficient of linear expansion of the pendulum is $\frac{12 \times 10^{- 6}}{^{\circ} C}$ . How much time will it gain or lose per day

Discussion

3.	(a) Forthe telescope described in Exercise 9.34 (a), what is the separationbetween the objective lens and the eyepiece?(b) If this telescope isused to view a 100 m tall tower 3 km away, what is the height of theimage of the tower formed by the objective lens?(c) What is the height of the final image of the tower if it is formedat 25 cm?
Answer» (a) For the telescope described in Exercise 9.34 (a), what is the separation between the objective lens and the eyepiece? (b) If this telescope is used to view a 100 m tall tower 3 km away, what is the height of the image of the tower formed by the objective lens? (c) What is the height of the final image of the tower if it is formed at 25 cm?

3.

(a) Forthe telescope described in Exercise 9.34 (a), what is the separationbetween the objective lens and the eyepiece?(b) If this telescope isused to view a 100 m tall tower 3 km away, what is the height of theimage of the tower formed by the objective lens?(c) What is the height of the final image of the tower if it is formedat 25 cm?

Answer»

(a) For
the telescope described in Exercise 9.34 (a), what is the separation
between the objective lens and the eyepiece?

(b) If this telescope is
used to view a 100 m tall tower 3 km away, what is the height of the
image of the tower formed by the objective lens?

(c)
What is the height of the final image of the tower if it is formed
at 25 cm?

Discussion

4.	The engine pumps water through a hose pipe.}Water passes through the pipe and leaves itwith a velocity 2m/s. The mass per unit length of water in the pipe is 100 kg/m.What is the power of the engine
Answer» The engine pumps water through a hose pipe.}Water passes through the pipe and leaves itwith a velocity 2m/s. The mass per unit length of water in the pipe is 100 kg/m.What is the power of the engine

Discussion

5.	In he given circuit, a charge of +80 μC is given to the upper plate of the 4μF capacitor. Then in the steady state, the charge on the upper plate of the 3 μF capacitor isDiagram
Answer» In he given circuit, a charge of $+ 80 μ C$ is given to the upper plate of the $4 μ F$ capacitor. Then in the steady state, the charge on the upper plate of the $3 μ F$ capacitor is Diagram

Discussion

6.	A body of mass 0.01 kg executes simple harmonic motion (SHM) about x=0 under the influence of a force F which varies with x as shown in figure. Find the time period of SHM of the body.
Answer» A body of mass $0.01 kg$ executes simple harmonic motion (SHM) about $x = 0$ under the influence of a force $F$ which varies with $x$ as shown in figure. Find the time period of SHM of the body.

Discussion

7.	Three blocks of masses m1,m2 and m3 are connected by massless strings as shown on a friction less table. They are pulled with a force T3=40 N. If m1=10 kg, m2=6 kg and m3=4 kg, the tension T2 will be
Answer» Three blocks of masses $m_{1}, m_{2}$ and $m_{3}$ are connected by massless strings as shown on a friction less table. They are pulled with a force $T_{3} = 40 N$ . If $m_{1} = 10 k g, m_{2} = 6 k g a n d m_{3} = 4 k g$ , the tension $T_{2}$ will be

Discussion

8.	A particle of mass m strikes elastically on the wall with velocity v at angle of60°from the wall then magnitude of change in momentum of boll along the wall is
Answer» A particle of mass m strikes elastically on the wall with velocity v at angle of60°from the wall then magnitude of change in momentum of boll along the wall is

Discussion

9.	a body cools down from 45^° C to 40^° C in 5minutes and to35^° C in anothr 8min. find temp of surroundin
Answer» a body cools down from 45^° C to 40^° C in 5minutes and to35^° C in anothr 8min. find temp of surroundin

Discussion

10.	A simply supported beam AB of span L = 24 m is subjected to 2 wheel loads acting at a distance d = 5m apart as shown in the figure below. Each wheel transmits a load P = 3 kN and may occupyany position along the beam. If beam is an I-section having section modulus; S = 16.2cm3, the Maximum bending stress (in Gpa) due to the wheel load is 1.783
Answer» A simply supported beam AB of span L = 24 m is subjected to 2 wheel loads acting at a distance d = 5m apart as shown in the figure below. Each wheel transmits a load P = 3 kN and may occupy any position along the beam. If beam is an I-section having section modulus; S = $16.2 c m^{3}$ , the Maximum bending stress (in Gpa) due to the wheel load is 1.783

Discussion

11.	The power dissipated by R=2 Ω resistor is -
Answer» The power dissipated by $R = 2 Ω$ resistor is -

Discussion

12.	A variable resistor R is wired into a circuit as shown below. To what value should this variable resistor be set to generate 0.9 A of current passing through the 10 ohm resistor?
Answer» A variable resistor $R$ is wired into a circuit as shown below. To what value should this variable resistor be set to generate $0.9 A$ of current passing through the $10$ ohm resistor?

Discussion

13.	A bar AB of diameter 45mm and 1m long is rigidly fixed at its ends. A torque of 100N−m is applied at a section of the bar, 625mm from end A. The fixing couples TA and TB at the supports A & B respectively, are:
Answer» A bar AB of diameter $45 m m$ and $1 m$ long is rigidly fixed at its ends. A torque of $100 N - m$ is applied at a section of the bar, $625 m m$ from end A. The fixing couples $T_{A}$ and $T_{B}$ at the supports A & B respectively, are:

Discussion

14.	A particle is performing uniform circular motion with speed pi m/s. If radius of circular path is 2m then magnitude of average velocity of particle in time interval, delta t=1.5s is?
Answer» A particle is performing uniform circular motion with speed pi m/s. If radius of circular path is 2m then magnitude of average velocity of particle in time interval, delta t=1.5s is?

Discussion

15.	A plane wavefront hits convex lens as shown in figure. Which graph represent refracted wavefront from lens.
Answer» A plane wavefront hits convex lens as shown in figure. Which graph represent refracted wavefront from lens.

Discussion

16.	The volume of a given mass of a gas is 100ml at 100∘C. If pressure is kept constant at what temperature will the sample have the volume of 200ml?
Answer» The volume of a given mass of a gas is 100ml at $100^{\circ}$ C. If pressure is kept constant at what temperature will the sample have the volume of 200ml?

Discussion

17.	What is the hybridisation of N2O, C2H2, NO2, H3BO3 ? with solution
Answer» What is the hybridisation of N2O, C2H2, NO2, H3BO3 ? with solution

Discussion

18.	Find range of projectile on the inclined plane which is projected perpendicular to the incline plane with velocity 20 m/s as shown in the figure.
Answer» Find range of projectile on the inclined plane which is projected perpendicular to the incline plane with velocity $20 m/s$ as shown in the figure.

Discussion

19.	In the figure the intensity of waves arriving at D from two coherent sources s1 and s2 is I0. The wavelength of the wave is λ=4m. Resultant intensity at D will be
Answer» In the figure the intensity of waves arriving at D from two coherent sources $s_{1}$ and $s_{2}$ is $I_{0}$ . The wavelength of the wave is $λ = 4 m$ . Resultant intensity at D will be

19.

In the figure the intensity of waves arriving at D from two coherent sources s1 and s2 is I0. The wavelength of the wave is λ=4m. Resultant intensity at D will be

Answer»

In the figure the intensity of waves arriving at D from two coherent sources $s_{1}$ and $s_{2}$ is $I_{0}$ . The wavelength of the wave is $λ = 4 m$ . Resultant intensity at D will be

Discussion

20.	The equation of projectile on a certain planet is y=√3x-5x^2.The ratio of maximum height attained to horizontal range is
Answer» The equation of projectile on a certain planet is y=√3x-5x^2.The ratio of maximum height attained to horizontal range is

Discussion

21.	59. Explain spectrum of electromagnetic radiation
Answer» 59. Explain spectrum of electromagnetic radiation

Discussion

22.	what type of cartilage is present in fibrous joints and cartilagenous joints?
Answer» what type of cartilage is present in fibrous joints and cartilagenous joints?

Discussion

23.	Transverse waves are generated in two uniform steel wires A and B of diameters 10−3 m and 0.5×10−3 m respectively, by attaching their free end to a vibrating source of frequency 500 Hz. The ratio of the wavelengths if they are stretched with the same tension is
Answer» Transverse waves are generated in two uniform steel wires A and B of diameters $10^{- 3} m$ and $0.5 \times 10^{- 3} m$ respectively, by attaching their free end to a vibrating source of frequency 500 Hz. The ratio of the wavelengths if they are stretched with the same tension is

Discussion

24.	16. when speed of dc motor increase the armature current
Answer» 16. when speed of dc motor increase the armature current

Discussion

25.	By using properties of definite integrals, evaluate the integrals ∫a0√x√x+√a−xdx.
Answer» By using properties of definite integrals, evaluate the integrals $\int_{0}^{a} \frac{\sqrt{x}}{\sqrt{x} + \sqrt{a - x}} d x .$

Discussion

26.	What should be the distance between the object in Exercise 9.30 and the magnifying glass if the virtual image of each square in thefigure is to have an area of 6.25 mm2 . Would you be able to see thesquares distinctly with your eyes very close to the magnifier ?[Note: Exercises 9.29 to 9.31 will help you clearly understand thedifference between magnification in absolute size and the angularmagnification (or magnifying power) of an instrument.]
Answer» What should be the distance between the object in Exercise 9.30 and the magnifying glass if the virtual image of each square in thefigure is to have an area of 6.25 mm2 . Would you be able to see thesquares distinctly with your eyes very close to the magnifier ?[Note: Exercises 9.29 to 9.31 will help you clearly understand thedifference between magnification in absolute size and the angularmagnification (or magnifying power) of an instrument.]

Discussion

27.	A plane mirror revolves as shown at constant angular velocity 2rps about its normal. With what velocity will light spot move along spherical screen of radius 10m if mirror is at centre of curvature of screen and light is incident from fixed direction
Answer» A plane mirror revolves as shown at constant angular velocity 2rps about its normal. With what velocity will light spot move along spherical screen of radius 10m if mirror is at centre of curvature of screen and light is incident from fixed direction

Discussion

28.	What is the impor†an ce of internal resis†an ce of a circuit
Answer» What is the impor†an ce of internal resis†an ce of a circuit

Discussion

29.	A uniform electric field pointing in positive x-direction exists in a region. Let A be the origin, B be the point on the x-axis at x=+1 cm and C be the point on the y-axis at y=+1 cm. Then, the potentials at the points A, B and C satisfy
Answer» A uniform electric field pointing in positive $x$ -direction exists in a region. Let $A$ be the origin, $B$ be the point on the $x$ -axis at $x = + 1 cm$ and $C$ be the point on the $y$ -axis at $y = + 1 cm$ . Then, the potentials at the points $A, B$ and $C$ satisfy

Discussion

30.	A thin glass lens with relative refractive index μga=1.5 , has an optical power of −5 D in air. Its optical power in a liquid medium with relative refractive index μla=1.6 will be [Assume, lens is fully immersed in the liquid]
Answer» A thin glass lens with relative refractive index $μ_{a}^{g} = 1.5$ , has an optical power of $- 5 D$ in air. Its optical power in a liquid medium with relative refractive index $μ_{a}^{l} = 1.6$ will be [Assume, lens is fully immersed in the liquid]

Discussion

31.	7.IN A REGION OF SPACE , SUPPOSE THERE EXIST A UNIFORM ELECTRIC FIELD E =10icap (V/M).IF POSITIVE CHARGE MOVES WITH VELOCITY V = -2jcap,its P.E WILL 1-INCREASE 2-DECREASE 3-DOES NOT CHANGE 4-REMAINS CONSTANT
Answer» 7.IN A REGION OF SPACE , SUPPOSE THERE EXIST A UNIFORM ELECTRIC FIELD E =10icap (V/M).IF POSITIVE CHARGE MOVES WITH VELOCITY V = -2jcap,its P.E WILL 1-INCREASE 2-DECREASE 3-DOES NOT CHANGE 4-REMAINS CONSTANT

Discussion

32.	metallic charged shell of radius R has a charge Q on its surface, the ratio of potential at A and B ie Va/Vb is? If point A lies on surface and point B at R/2 distance AWAY from the surface (=outside the sphere).
Answer» metallic charged shell of radius R has a charge Q on its surface, the ratio of potential at A and B ie Va/Vb is? If point A lies on surface and point B at R/2 distance AWAY from the surface (=outside the sphere).

Discussion

33.	A capacitor, made of two parallel plates each of plate area A and separation d, being charged by an external AC source. Show that the displacement current inside the capacitor is same as the current charging the capacitor.
Answer» A capacitor, made of two parallel plates each of plate area $A$ and separation $d$ , being charged by an external AC source. Show that the displacement current inside the capacitor is same as the current charging the capacitor.

Discussion

34.	A circular wire loop of radius r carries a total charge Q distributed uniformly over its length. A small length dl of the wire is cut off. The electric field at the centre due to the remaining wire is:-
Answer» A circular wire loop of radius $r$ carries a total charge $Q$ distributed uniformly over its length. A small length $d l$ of the wire is cut off. The electric field at the centre due to the remaining wire is:-

Discussion

35.	A small block of mass 100 g is pressed against a horizontal spring fixed at one end to compress it by 5 cm. The spring constant is 100 N/m. When released, the block moves horizontally till it leaves the spring. Where will it hit the ground ?(Take, h=2 m, g=10 m/s2)
Answer» A small block of mass $100 g$ is pressed against a horizontal spring fixed at one end to compress it by $5 cm$ . The spring constant is $100 N/m$ . When released, the block moves horizontally till it leaves the spring. Where will it hit the ground ? $(Take, h = 2 m, g = 10 {m/s}^{2})$

Discussion

36.	Two mutually perpendicular infinite wires along x-axis and y-axis carry charge density λ1 and λ2. The electric line of force at P is along the line y=x√3, where P is also a point lying on the same line, then find λ1λ2
Answer» Two mutually perpendicular infinite wires along $x-$ axis and $y-$ axis carry charge density $λ_{1}$ and $λ_{2}$ . The electric line of force at $P$ is along the line $y = \frac{x}{\sqrt{3}}$ , where $P$ is also a point lying on the same line, then find $\frac{λ_{1}}{λ_{2}}$

Discussion

37.	The length of a metal wire is l1 when the tension in it is T1 and is l2 when the tension is T2. The natural length of the wire is
Answer» The length of a metal wire is $l_{1}$ when the tension in it is $T_{1}$ and is $l_{2}$ when the tension is $T_{2}$ . The natural length of the wire is

Discussion

38.	A platform (plank) with a mass m placed on it, executes vertical simple-harmonic motion according to equation,, where ω and t are in rad s–1 and second respectively. Maximum value of angular frequency(ω) for which the mass does not detach itself from the platform is
Answer» A platform (plank) with a mass m placed on it, executes vertical simple-harmonic motion according to equation,, where ω and t are in rad s–1 and second respectively. Maximum value of angular frequency(ω) for which the mass does not detach itself from the platform is

Discussion

39.	The Nyquist interval corresponding to the continuous time signal x(t)=[Sa3(150πt)∗Sa2(200πt)]Sa(600πt) is _______ msec.1
Answer» The Nyquist interval corresponding to the continuous time signal $x (t) = [S a^{3} (150 π t) * S a^{2} (200 π t)] S a (600 π t)$ is _______ msec. 1

Discussion

40.	Explain about positive work, negative work and zero work with proper examples and pepper conditions required for that in detail with calculation.
Answer» Explain about positive work, negative work and zero work with proper examples and pepper conditions required for that in detail with calculation.

Discussion

41.	Masses M1,M2 and M3 are connected by strings of negligible mass which pass over massless and frictionless pulleys P1 and P2 as shown in fig. The masses move such that the portion of the string between P1 and P2 is parallel to the inclined plane and the portion of the string between P2 and M3 is horizontal. The masses M2 and M3 are 4.0 kg each and the coefficient of kinetic friction between the masses and the surface is 0.25. The inclined plane makes an angle of 37∘ with the horizontal. If the mass M1 moves downwards with a uniform velocity. find the mass of M1 in kg.
Answer» Masses $M_{1}, M_{2}$ and $M_{3}$ are connected by strings of negligible mass which pass over massless and frictionless pulleys $P_{1}$ and $P_{2}$ as shown in fig. The masses move such that the portion of the string between $P_{1}$ and $P_{2}$ is parallel to the inclined plane and the portion of the string between $P_{2}$ and $M_{3}$ is horizontal. The masses $M_{2}$ and $M_{3}$ are $4.0 k g$ each and the coefficient of kinetic friction between the masses and the surface is $0.25.$ The inclined plane makes an angle of $37^{\circ}$ with the horizontal. If the mass $M_{1}$ moves downwards with a uniform velocity. find the mass of $M_{1}$ in $kg$ .

Discussion

42.	In the given figure, the block is displaced slightly and released. Then, the time period of oscillation is:
Answer» In the given figure, the block is displaced slightly and released. Then, the time period of oscillation is:

Discussion

43.	50. What is specific conductance
Answer» 50. What is specific conductance

Discussion

44.	Which of the following graph shows the variation of magnetic induction B with distance r from a long current carrying wire is
Answer» Which of the following graph shows the variation of magnetic induction $B$ with distance $r$ from a long current carrying wire is

Discussion

45.	Why is the fraction of the Ray near the boundary has lass refractive index that it travels faster and makes the Ray look like converging?
Answer» Why is the fraction of the Ray near the boundary has lass refractive index that it travels faster and makes the Ray look like converging?

Discussion

46.	A meter stick (object) is placed in an upright position in front of a plane mirror as shown in the diagram. The image of the meter stick is equidistant from the mirror. Suppose that the meter stick is equipped with a working eyeball capable of viewing the top and the bottom of its image. The eyeball is located at the 90 cm mark on the meter stick. Determine the location of the intersection of the eye's line of sight with the mirror as the eyeball sights at the top of the image.
Answer» A meter stick (object) is placed in an upright position in front of a plane mirror as shown in the diagram. The image of the meter stick is equidistant from the mirror. Suppose that the meter stick is equipped with a working eyeball capable of viewing the top and the bottom of its image. The eyeball is located at the $90 cm$ mark on the meter stick. Determine the location of the intersection of the eye's line of sight with the mirror as the eyeball sights at the top of the image.

Discussion

47.	If the accelerating voltage of the Coolidge tube setup is increased two times, the kinetic energy of an electron reaching anode will get
Answer» If the accelerating voltage of the Coolidge tube setup is increased two times, the kinetic energy of an electron reaching anode will get

Discussion

48.	Three rings, each having equal radius R, are placed mutually perpendicular to each other and each having its center at the origin of coordinate system. If current I is flowing through each ring, then the magnitude of the magnetic filed at the common center is
Answer» Three rings, each having equal radius R, are placed mutually perpendicular to each other and each having its center at the origin of coordinate system. If current I is flowing through each ring, then the magnitude of the magnetic filed at the common center is

Discussion

49.	NO2 dimerises but NO does not eventhough both are odd electron containing species. why
Answer» NO2 dimerises but NO does not eventhough both are odd electron containing species. why

Discussion

50.	Two particles each of mass 5 kg are attached to the two ends of a light string of length 15 cm which passes through a hole at the center of a table. One particle describes a circle on the table with angular velocity ω1=2 rad/sec and the other describes a circle as a conical pendulum with angular velocity ω2=3 rad/sec below the table as shown in the figure. If l1 and l2 are the lengths of the portion of the string above and below the table, then the ratio of l1 and l2 is
Answer» Two particles each of mass $5 kg$ are attached to the two ends of a light string of length $15 cm$ which passes through a hole at the center of a table. One particle describes a circle on the table with angular velocity $ω_{1} = 2 rad/sec$ and the other describes a circle as a conical pendulum with angular velocity $ω_{2} = 3 rad/sec$ below the table as shown in the figure. If $l_{1}$ and $l_{2}$ are the lengths of the portion of the string above and below the table, then the ratio of $l_{1}$ and $l_{2}$ is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If the intermolecular forces vanish away, the volume occupied by the molecules contained in 4.5 kg water at STP will be

A clock which keeps correct time at 20∘C, is subjected to 40∘C. If coefficient of linear expansion of the pendulum is 12×10−6∘C. How much time will it gain or lose per day

The engine pumps water through a hose pipe.}Water passes through the pipe and leaves itwith a velocity 2m/s. The mass per unit length of water in the pipe is 100 kg/m.What is the power of the engine

In he given circuit, a charge of +80 μC is given to the upper plate of the 4μF capacitor. Then in the steady state, the charge on the upper plate of the 3 μF capacitor isDiagram

A body of mass 0.01 kg executes simple harmonic motion (SHM) about x=0 under the influence of a force F which varies with x as shown in figure. Find the time period of SHM of the body.

Three blocks of masses m1,m2 and m3 are connected by massless strings as shown on a friction less table. They are pulled with a force T3=40 N. If m1=10 kg, m2=6 kg and m3=4 kg, the tension T2 will be

A particle of mass m strikes elastically on the wall with velocity v at angle of60°from the wall then magnitude of change in momentum of boll along the wall is

a body cools down from 45^° C to 40^° C in 5minutes and to35^° C in anothr 8min. find temp of surroundin

The power dissipated by R=2 Ω resistor is -

A variable resistor R is wired into a circuit as shown below. To what value should this variable resistor be set to generate 0.9 A of current passing through the 10 ohm resistor?

A bar AB of diameter 45mm and 1m long is rigidly fixed at its ends. A torque of 100N−m is applied at a section of the bar, 625mm from end A. The fixing couples TA and TB at the supports A &amp; B respectively, are:

A particle is performing uniform circular motion with speed pi m/s. If radius of circular path is 2m then magnitude of average velocity of particle in time interval, delta t=1.5s is?

A plane wavefront hits convex lens as shown in figure. Which graph represent refracted wavefront from lens.

The volume of a given mass of a gas is 100ml at 100∘C. If pressure is kept constant at what temperature will the sample have the volume of 200ml?

What is the hybridisation of N2O, C2H2, NO2, H3BO3 ? with solution

Find range of projectile on the inclined plane which is projected perpendicular to the incline plane with velocity 20 m/s as shown in the figure.

In the figure the intensity of waves arriving at D from two coherent sources s1 and s2 is I0. The wavelength of the wave is λ=4m. Resultant intensity at D will be

The equation of projectile on a certain planet is y=√3x-5x^2.The ratio of maximum height attained to horizontal range is

59. Explain spectrum of electromagnetic radiation

what type of cartilage is present in fibrous joints and cartilagenous joints?

Transverse waves are generated in two uniform steel wires A and B of diameters 10−3 m and 0.5×10−3 m respectively, by attaching their free end to a vibrating source of frequency 500 Hz. The ratio of the wavelengths if they are stretched with the same tension is

16. when speed of dc motor increase the armature current

By using properties of definite integrals, evaluate the integrals ∫a0√x√x+√a−xdx.

A plane mirror revolves as shown at constant angular velocity 2rps about its normal. With what velocity will light spot move along spherical screen of radius 10m if mirror is at centre of curvature of screen and light is incident from fixed direction

What is the impor†an ce of internal resis†an ce of a circuit

A uniform electric field pointing in positive x-direction exists in a region. Let A be the origin, B be the point on the x-axis at x=+1 cm and C be the point on the y-axis at y=+1 cm. Then, the potentials at the points A, B and C satisfy

A thin glass lens with relative refractive index μga=1.5 , has an optical power of −5 D in air. Its optical power in a liquid medium with relative refractive index μla=1.6 will be [Assume, lens is fully immersed in the liquid]

7.IN A REGION OF SPACE , SUPPOSE THERE EXIST A UNIFORM ELECTRIC FIELD E =10icap (V/M).IF POSITIVE CHARGE MOVES WITH VELOCITY V = -2jcap,its P.E WILL 1-INCREASE 2-DECREASE 3-DOES NOT CHANGE 4-REMAINS CONSTANT

metallic charged shell of radius R has a charge Q on its surface, the ratio of potential at A and B ie Va/Vb is? If point A lies on surface and point B at R/2 distance AWAY from the surface (=outside the sphere).

A capacitor, made of two parallel plates each of plate area A and separation d, being charged by an external AC source. Show that the displacement current inside the capacitor is same as the current charging the capacitor.

A circular wire loop of radius r carries a total charge Q distributed uniformly over its length. A small length dl of the wire is cut off. The electric field at the centre due to the remaining wire is:-

A small block of mass 100 g is pressed against a horizontal spring fixed at one end to compress it by 5 cm. The spring constant is 100 N/m. When released, the block moves horizontally till it leaves the spring. Where will it hit the ground ?(Take, h=2 m, g=10 m/s2)

Two mutually perpendicular infinite wires along x-axis and y-axis carry charge density λ1 and λ2. The electric line of force at P is along the line y=x√3, where P is also a point lying on the same line, then find λ1λ2

The length of a metal wire is l1 when the tension in it is T1 and is l2 when the tension is T2. The natural length of the wire is

A platform (plank) with a mass m placed on it, executes vertical simple-harmonic motion according to equation,, where ω and t are in rad s–1 and second respectively. Maximum value of angular frequency(ω) for which the mass does not detach itself from the platform is

The Nyquist interval corresponding to the continuous time signal x(t)=[Sa3(150πt)∗Sa2(200πt)]Sa(600πt) is _______ msec.1

Explain about positive work, negative work and zero work with proper examples and pepper conditions required for that in detail with calculation.

In the given figure, the block is displaced slightly and released. Then, the time period of oscillation is:

50. What is specific conductance

Which of the following graph shows the variation of magnetic induction B with distance r from a long current carrying wire is

Why is the fraction of the Ray near the boundary has lass refractive index that it travels faster and makes the Ray look like converging?

If the accelerating voltage of the Coolidge tube setup is increased two times, the kinetic energy of an electron reaching anode will get

Three rings, each having equal radius R, are placed mutually perpendicular to each other and each having its center at the origin of coordinate system. If current I is flowing through each ring, then the magnitude of the magnetic filed at the common center is

NO2 dimerises but NO does not eventhough both are odd electron containing species. why

A bar AB of diameter 45mm and 1m long is rigidly fixed at its ends. A torque of 100N−m is applied at a section of the bar, 625mm from end A. The fixing couples TA and TB at the supports A & B respectively, are: