50278 + Interview Questions in Physics Page 192 InterviewSolution

9551.	Why cos π=(-1)
Answer» Why cos π=(-1)

Discussion

9552.	A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 34 of the angle of the prism. The angle of deviation is
Answer» A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to $\frac{3}{4}$ of the angle of the prism. The angle of deviation is

Discussion

9553.	A body of mass 10 kg is kept on a rough horizontal surface. A force of 50 N is required to just move the body. If the body is cut into two equal parts and placed one over the other, find the force required to just move the body.
Answer» A body of mass $10 kg$ is kept on a rough horizontal surface. A force of $50 N$ is required to just move the body. If the body is cut into two equal parts and placed one over the other, find the force required to just move the body.

Discussion

9554.	If the resistivity Tof a wire depends upon the resistance of the wire R, lengthL, diameter D ,.the derive the expression for the resistivity of the wore with dimensional method.
Answer» If the resistivity Tof a wire depends upon the resistance of the wire R, lengthL, diameter D ,.the derive the expression for the resistivity of the wore with dimensional method.

Discussion

9555.	The rear side of a truck is open and a box of 40 kg mass is placed 5 m away from the open end as shown in Fig. 5.22. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2 m s–2. At what distance from the starting point does the box fall off the truck? (Ignore the size of the box).Fig. 5.22
Answer» The rear side of a truck is open and a box of 40 kg mass is placed 5 m away from the open end as shown in Fig. 5.22. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2 m s^–2. At what distance from the starting point does the box fall off the truck? (Ignore the size of the box). Fig. 5.22

9555.

The rear side of a truck is open and a box of 40 kg mass is placed 5 m away from the open end as shown in Fig. 5.22. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2 m s–2. At what distance from the starting point does the box fall off the truck? (Ignore the size of the box).Fig. 5.22

Answer»

The rear side of a truck is open and a box of 40 kg mass is placed 5 m away from the open end as shown in Fig. 5.22. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2 m s^–2. At what distance from the starting point does the box fall off the truck? (Ignore the size of the box).

Fig. 5.22

Discussion

9556.	A police van moving on a highway with a speed of 30 km h–1 fires a bullet at a thief’s car speeding away in the same direction with a speed of 192 km h–1. If the muzzle speed of the bullet is 150 m s–1, with what speed does the bullet hit the thief’s car ? (Note: Obtain that speed which is relevant for damaging the thief’s car).
Answer» A police van moving on a highway with a speed of 30 km h^–1 fires a bullet at a thief’s car speeding away in the same direction with a speed of 192 km h^–1. If the muzzle speed of the bullet is 150 m s^–1, with what speed does the bullet hit the thief’s car ? (Note: Obtain that speed which is relevant for damaging the thief’s car).

Discussion

9557.	For the reaction, Br2(g)→2Br(g), the correct option is:
Answer» For the reaction, $B r_{2} (g) \to 2 B r (g),$ the correct option is:

Discussion

9558.	Write the equation of the wave shown in figure, if its position is shown at t=0.6 sec. The wavelength is 15 cm and amplitude is 4 cm and the crest X was at x=0 at t=0.
Answer» Write the equation of the wave shown in figure, if its position is shown at $t = 0.6 sec$ . The wavelength is $15 cm$ and amplitude is $4 cm$ and the crest $X$ was at $x = 0$ at $t = 0$ .

Discussion

9559.	The efficiency of an ideal heat engine between the freezing and boiling point of water is:
Answer» The efficiency of an ideal heat engine between the freezing and boiling point of water is:

Discussion

9560.	In a LCR circuit capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from ‘L’ to
Answer» In a LCR circuit capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from ‘L’ to

Discussion

9561.	Steam at 100∘C is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at 15∘C till the temperature of the calorimeter and its contents rises to 80∘C. The mass of the steam condensed in kg is
Answer» Steam at $100^{\circ} C$ is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at $15^{\circ} C$ till the temperature of the calorimeter and its contents rises to $80^{\circ} C$ . The mass of the steam condensed in kg is

9561.

Steam at 100∘C is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at 15∘C till the temperature of the calorimeter and its contents rises to 80∘C. The mass of the steam condensed in kg is

Answer»

Steam at $100^{\circ} C$ is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at $15^{\circ} C$ till the temperature of the calorimeter and its contents rises to $80^{\circ} C$ . The mass of the steam condensed in kg is

Discussion

9562.	Vibrating tuning fork of frequency n is placed near the open end of a long cylindrical tube. The tube has a side opening and is fitted with a movable reflecting piston. As the piston is moved through 8.75 cm, the intensity of sound changes from a maximum to minimum. If the speed of sound is 350 m/s. Then n is
Answer» Vibrating tuning fork of frequency n is placed near the open end of a long cylindrical tube. The tube has a side opening and is fitted with a movable reflecting piston. As the piston is moved through 8.75 cm, the intensity of sound changes from a maximum to minimum. If the speed of sound is 350 m/s. Then n is

9562.

Vibrating tuning fork of frequency n is placed near the open end of a long cylindrical tube. The tube has a side opening and is fitted with a movable reflecting piston. As the piston is moved through 8.75 cm, the intensity of sound changes from a maximum to minimum. If the speed of sound is 350 m/s. Then n is

Answer»

Vibrating tuning fork of frequency n is placed near the open end of a long cylindrical tube. The tube has a side opening and is fitted with a movable reflecting piston. As the piston is moved through 8.75 cm, the intensity of sound changes from a maximum to minimum. If the speed of sound is 350 m/s. Then n is

Discussion

9563.	A vertical metal cylinder of radius 2 cm and length 2 m is fixed at the lower end and a load of 100 kg is put on it. Find (a) the stress (b) the strain and (c) the compression of the cylinder. Young modulus of the metal = 2×1011Nm−2.
Answer» A vertical metal cylinder of radius 2 cm and length 2 m is fixed at the lower end and a load of 100 kg is put on it. Find (a) the stress (b) the strain and (c) the compression of the cylinder. Young modulus of the metal = $2 \times 10^{11} N m^{- 2}$ .

Discussion

9564.	39.Calculate the gravitational force of attraction between a woman weighing 50 kg and and her child of 12 kg seperated by a distance of 2m.
Answer» 39.Calculate the gravitational force of attraction between a woman weighing 50 kg and and her child of 12 kg seperated by a distance of 2m.

Discussion

9565.	A disc of mass M kg and radius R metre is rotating at an angular speed of ω rad/s when the motor is switched off. Neglecting the friction at the axle, the force that must be applied tangentially to the wheel to bring it to rest in time is
Answer» A disc of mass M kg and radius R metre is rotating at an angular speed of ω rad/s when the motor is switched off. Neglecting the friction at the axle, the force that must be applied tangentially to the wheel to bring it to rest in time is

Discussion

9566.	A coil of inductance 8.4 mH and resistance 6 Ω is connected to a 12 V battery. The current in the coil is 1 A at approximately the time is-
Answer» A coil of inductance $8.4 mH$ and resistance $6 Ω$ is connected to a $12 V$ battery. The current in the coil is $1 A$ at approximately the time is-

Discussion

9567.	A ball is released from a height of 200 m with a velocity of 10 m/s. Find the landing velocity of the ball. [Take g=10 m/s2]
Answer» A ball is released from a height of $200 m$ with a velocity of $10 m/s$ . Find the landing velocity of the ball. [Take $g = 10 {m/s}^{2}$ ]

Discussion

9568.	The electrostatic potential energy of a system containing two charges 7 μC and - 2 μC separated by a distance of 18 cm is
Answer» The electrostatic potential energy of a system containing two charges 7 μC and - 2 μC separated by a distance of 18 cm is

Discussion

9569.	Find the ratio of longest wavelength to the shortest wavelength of the Balmer series of hydrogen spectrum.
Answer» Find the ratio of longest wavelength to the shortest wavelength of the Balmer series of hydrogen spectrum.

Discussion

9570.	The escape velocity of a body from earth is about 11.2 km/s. Assuming the mass and radius of the earth to be about 81 and 4 times the mass and radius of the moon. The escape velocity in km/s from the surface of the moon will be
Answer» The escape velocity of a body from earth is about $11.2 km/s$ . Assuming the mass and radius of the earth to be about $81$ and $4$ times the mass and radius of the moon. The escape velocity in $km/s$ from the surface of the moon will be

Discussion

9571.	There are n identical capacitors which are connected in parallel to a potential difference V. These capacitors are then reconnected in series. The potential difference between the extreme ends is
Answer» There are $n$ identical capacitors which are connected in parallel to a potential difference $V .$ These capacitors are then reconnected in series. The potential difference between the extreme ends is

Discussion

9572.	One body is dropped, while a second body is thrown downward with an initial velocity of 1 m s−1 simultaneously. The separation between these is 18 m after a time
Answer» One body is dropped, while a second body is thrown downward with an initial velocity of $1 {m s}^{- 1}$ simultaneously. The separation between these is $18 m$ after a time

Discussion

9573.	A U-tube of cross section A and 2A contains liquid of density ρ. Initially, the liquid in the two arms are held with a level difference h as shown in figure. After being released, the levels equalize after some time. The work done by gravity forces on the liquid in the process is:
Answer» A U-tube of cross section $A$ and $2 A$ contains liquid of density $ρ$ . Initially, the liquid in the two arms are held with a level difference $h$ as shown in figure. After being released, the levels equalize after some time. The work done by gravity forces on the liquid in the process is:

Discussion

9574.	One mole of an ideal gas with heat capacity at constant pressure Cp undergoes the process T=T0+αV where T0 and α are constants. If its volume increases from V1 to V2, the amount of heat transfered to the gas is
Answer» One mole of an ideal gas with heat capacity at constant pressure $C_{p}$ undergoes the process $T = T_{0} + α V$ where $T_{0}$ and $α$ are constants. If its volume increases from $V_{1}$ to $V_{2}$ , the amount of heat transfered to the gas is

Discussion

9575.	Half of the space between the plates of a parallel plate capacitor is filled with a medium of dielectric constant K parallel to the plates. If initially the capacitance is C, then the new capacitance will be
Answer» Half of the space between the plates of a parallel plate capacitor is filled with a medium of dielectric constant $K$ parallel to the plates. If initially the capacitance is $C$ , then the new capacitance will be

Discussion

9576.	A positron and a proton are projected normal to a uniform electrix field with equal kinetic energies. Trajectory followee by them area) Circular with equal radiusb) Elliptical with same major and minor axisc) Parabolic with identical trajectoryd) Hyperbolic with identical trajectory
Answer» A positron and a proton are projected normal to a uniform electrix field with equal kinetic energies. Trajectory followee by them are a) Circular with equal radius b) Elliptical with same major and minor axis c) Parabolic with identical trajectory d) Hyperbolic with identical trajectory

Discussion

9577.	Transitions between three energy levels in a particular atom give rise to three spectral lines of wavelengths, in increasing magnitudes, λ1,λ2 and λ3. Which one of the following equations correctly relates λ1,λ2, and λ3?
Answer» Transitions between three energy levels in a particular atom give rise to three spectral lines of wavelengths, in increasing magnitudes, $λ_{1}, λ_{2}$ and $λ_{3}$ . Which one of the following equations correctly relates $λ_{1}, λ_{2}$ , and $λ_{3}$ ?

Discussion

9578.	The work done in turning a magnet of magnetic moment ‘M′ by an angle of 90∘ from the meridian is ‘n′ times the corresponding work done to turn it through an angle of 60∘, where ‘n′ is given by
Answer» The work done in turning a magnet of magnetic moment $‘ M^{'}$ by an angle of $90^{\circ}$ from the meridian is $‘ n^{'}$ times the corresponding work done to turn it through an angle of $60^{\circ}$ , where $‘ n^{'}$ is given by

Discussion

9579.	There are two force vectors, one of 5 N and other of 12 N at what angle the two vectors be added to get resultant vector of 17 N, 7 N and 13 N respectively
Answer» There are two force vectors, one of 5 N and other of 12 N at what angle the two vectors be added to get resultant vector of 17 N, 7 N and 13 N respectively

Discussion

9580.	A swimmer's speed in the direction of flow of river is 16 kmh−1. Against the direction of flow of river, the swimmer's speed is 8 kmh−1. Calculate the swimmer's speed in still water and the velocity of flow of the river.
Answer» A swimmer's speed in the direction of flow of river is $16 k m h^{- 1} .$ Against the direction of flow of river, the swimmer's speed is $8 k m h^{- 1} .$ Calculate the swimmer's speed in still water and the velocity of flow of the river.

Discussion

9581.	The area of the region, enclosed by the circle x2+y2=2 which is not common to the region bounded by the parabola y2=x and the straight line y=x, is
Answer» The area of the region, enclosed by the circle $x^{2} + y^{2} = 2$ which is not common to the region bounded by the parabola $y^{2} = x$ and the straight line $y = x$ , is

Discussion

9582.	what is mean by permitivity and permiability and differance between them
Answer» what is mean by permitivity and permiability and differance between them

Discussion

9583.	A body is thrown vertically upward from the top A of tower. It reaches the ground in t1 s. If it is thrown vertically downwards from A with the same speed it reaches the ground in t2 s. If it is allowed to fall freely from A, then the time it takes to reach the ground is given by
Answer» A body is thrown vertically upward from the top $A$ of tower. It reaches the ground in $t_{1} s$ . If it is thrown vertically downwards from $A$ with the same speed it reaches the ground in $t_{2} s$ . If it is allowed to fall freely from $A$ , then the time it takes to reach the ground is given by

Discussion

9584.	If a particle is projected from point A, normal to the plane calculate(i) Time of flight?(ii) AB=?
Answer» If a particle is projected from point A, normal to the plane calculate (i) Time of flight? (ii) AB=?

9584.

If a particle is projected from point A, normal to the plane calculate(i) Time of flight?(ii) AB=?

Answer»

If a particle is projected from point A, normal to the plane calculate

(i) Time of flight?

(ii) AB=?

Discussion

9585.	Water pours out at the rate of Q from a tap , into a cylindrical vessel of radius r. Find THE rate at which the height of water level rises when the height is h.
Answer» Water pours out at the rate of Q from a tap , into a cylindrical vessel of radius r. Find THE rate at which the height of water level rises when the height is h.

Discussion

9586.	A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference V esu. If e and m are charge and mass of an electron, respectively, then the value of hλ (where λ is wavelength associated with electron wave) is given by:
Answer» A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference V esu. If e and m are charge and mass of an electron, respectively, then the value of $\frac{h}{λ}$ (where $λ$ is wavelength associated with electron wave) is given by:

Discussion

9587.	70.Find the effective capacitance between P and Q of the arrangement shown in the figure
Answer» 70.Find the effective capacitance between P and Q of the arrangement shown in the figure

Discussion

9588.	a series combinattion of n1 capacitors each of value C1, is charged by a source of potentil difference 4V.WAHEN another parallel combinaton of n2 capacitors each of value C2 is charged by a source of potential difference V.
Answer» a series combinattion of n1 capacitors each of value C1, is charged by a source of potentil difference 4V.WAHEN another parallel combinaton of n2 capacitors each of value C2 is charged by a source of potential difference V.

Discussion

9589.	Let P(r)=(Q*r)/R4 be the charge density distribution for solid sphere of radius R & total charge Q. for a point p,inside a sphere at a distance r1from centre of sphere,the magnitude of electric field is?
Answer» Let P(r)=(Q*r)/R4 be the charge density distribution for solid sphere of radius R & total charge Q. for a point p,inside a sphere at a distance r1from centre of sphere,the magnitude of electric field is?

Discussion

9590.	Consider the situation shown in figure, the switch S open for a long time and then closed. Then work done by the battery will be:
Answer» Consider the situation shown in figure, the switch $S$ open for a long time and then closed. Then work done by the battery will be:

Discussion

9591.	ntA body of mass m accelerates uniformly from rest to velocity v1 in time interval T1 .The instantaneous power delivered to the body as a function of time t is ?n
Answer» ntA body of mass m accelerates uniformly from rest to velocity v1 in time interval T1 .The instantaneous power delivered to the body as a function of time t is ?n

Discussion

9592.	If y=cosx3, then find dydx at x=0
Answer» If $y = cos x^{3}$ , then find $\frac{d y}{d x}$ at $x = 0$

Discussion

9593.	Write name and symbol of each variable of a gas.
Answer» Write name and symbol of each variable of a gas.

Discussion

9594.	how to find static friction?
Answer» how to find static friction?

Discussion

9595.	Find the average angular speed of the minute hand of a normal clock in 1.5 hrs.
Answer» Find the average angular speed of the minute hand of a normal clock in $1.5 hrs$ .

Discussion

9596.	2/459.Moment of inertia of a solid hemi-sphere ofmass m, radius R about the axis which isparallel to its diameter (as shown in figure).CM3R/8(1)mR2(2)mR21(3)mR2(4)mR2
Answer» 2/459.Moment of inertia of a solid hemi-sphere ofmass m, radius R about the axis which isparallel to its diameter (as shown in figure).CM3R/8(1)mR2(2)mR21(3)mR2(4)mR2

Discussion

9597.	the accerlation a of a particle in m\backslash s is given by a=(2t^2+3t+5) ,where t is the time .if the velocity of the particle at t=0,was 2m\backslash s,then calcaluate its velocity at t=3
Answer» the accerlation a of a particle in m\backslash s is given by a=(2t^2+3t+5) ,where t is the time .if the velocity of the particle at t=0,was 2m\backslash s,then calcaluate its velocity at t=3

Discussion

9598.	A hollow sphere of mass 50 kg and radius 5 cm is rotated about one of its diameter. The rotational inertia of hollow sphere about this axis is.
Answer» A hollow sphere of mass 50 kg and radius 5 cm is rotated about one of its diameter. The rotational inertia of hollow sphere about this axis is.

Discussion

9599.	Why is change in magnitude of velocity in circular motion is 2vsinx/2? Here x= angle swept.
Answer» Why is change in magnitude of velocity in circular motion is 2vsinx/2? Here x= angle swept.

Discussion

9600.	A particle is projected from ground with speed 80m/s at an angle 30 degree with horizontal from ground. The magnitude of average velocity of particle in time interval t= 2s to t = 6s. Is??
Answer» A particle is projected from ground with speed 80m/s at an angle 30 degree with horizontal from ground. The magnitude of average velocity of particle in time interval t= 2s to t = 6s. Is??

Discussion

Explore topic-wise InterviewSolutions in .

Why cos π=(-1)

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 34 of the angle of the prism. The angle of deviation is

A body of mass 10 kg is kept on a rough horizontal surface. A force of 50 N is required to just move the body. If the body is cut into two equal parts and placed one over the other, find the force required to just move the body.

If the resistivity Tof a wire depends upon the resistance of the wire R, lengthL, diameter D ,.the derive the expression for the resistivity of the wore with dimensional method.

For the reaction, Br2(g)→2Br(g), the correct option is:

Write the equation of the wave shown in figure, if its position is shown at t=0.6 sec. The wavelength is 15 cm and amplitude is 4 cm and the crest X was at x=0 at t=0.

The efficiency of an ideal heat engine between the freezing and boiling point of water is:

In a LCR circuit capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from ‘L’ to

Steam at 100∘C is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at 15∘C till the temperature of the calorimeter and its contents rises to 80∘C. The mass of the steam condensed in kg is

A vertical metal cylinder of radius 2 cm and length 2 m is fixed at the lower end and a load of 100 kg is put on it. Find (a) the stress (b) the strain and (c) the compression of the cylinder. Young modulus of the metal = 2×1011Nm−2.

39.Calculate the gravitational force of attraction between a woman weighing 50 kg and and her child of 12 kg seperated by a distance of 2m.

A disc of mass M kg and radius R metre is rotating at an angular speed of ω rad/s when the motor is switched off. Neglecting the friction at the axle, the force that must be applied tangentially to the wheel to bring it to rest in time is

A coil of inductance 8.4 mH and resistance 6 Ω is connected to a 12 V battery. The current in the coil is 1 A at approximately the time is-

A ball is released from a height of 200 m with a velocity of 10 m/s. Find the landing velocity of the ball. [Take g=10 m/s2]

The electrostatic potential energy of a system containing two charges 7 μC and - 2 μC separated by a distance of 18 cm is

Find the ratio of longest wavelength to the shortest wavelength of the Balmer series of hydrogen spectrum.

The escape velocity of a body from earth is about 11.2 km/s. Assuming the mass and radius of the earth to be about 81 and 4 times the mass and radius of the moon. The escape velocity in km/s from the surface of the moon will be

There are n identical capacitors which are connected in parallel to a potential difference V. These capacitors are then reconnected in series. The potential difference between the extreme ends is

One body is dropped, while a second body is thrown downward with an initial velocity of 1 m s−1 simultaneously. The separation between these is 18 m after a time

A U-tube of cross section A and 2A contains liquid of density ρ. Initially, the liquid in the two arms are held with a level difference h as shown in figure. After being released, the levels equalize after some time. The work done by gravity forces on the liquid in the process is:

One mole of an ideal gas with heat capacity at constant pressure Cp undergoes the process T=T0+αV where T0 and α are constants. If its volume increases from V1 to V2, the amount of heat transfered to the gas is

Half of the space between the plates of a parallel plate capacitor is filled with a medium of dielectric constant K parallel to the plates. If initially the capacitance is C, then the new capacitance will be

A positron and a proton are projected normal to a uniform electrix field with equal kinetic energies. Trajectory followee by them area) Circular with equal radiusb) Elliptical with same major and minor axisc) Parabolic with identical trajectoryd) Hyperbolic with identical trajectory

Transitions between three energy levels in a particular atom give rise to three spectral lines of wavelengths, in increasing magnitudes, λ1,λ2 and λ3. Which one of the following equations correctly relates λ1,λ2, and λ3?

The work done in turning a magnet of magnetic moment ‘M′ by an angle of 90∘ from the meridian is ‘n′ times the corresponding work done to turn it through an angle of 60∘, where ‘n′ is given by

There are two force vectors, one of 5 N and other of 12 N at what angle the two vectors be added to get resultant vector of 17 N, 7 N and 13 N respectively

A swimmer's speed in the direction of flow of river is 16 kmh−1. Against the direction of flow of river, the swimmer's speed is 8 kmh−1. Calculate the swimmer's speed in still water and the velocity of flow of the river.

The area of the region, enclosed by the circle x2+y2=2 which is not common to the region bounded by the parabola y2=x and the straight line y=x, is

what is mean by permitivity and permiability and differance between them

A body is thrown vertically upward from the top A of tower. It reaches the ground in t1 s. If it is thrown vertically downwards from A with the same speed it reaches the ground in t2 s. If it is allowed to fall freely from A, then the time it takes to reach the ground is given by

If a particle is projected from point A, normal to the plane calculate(i) Time of flight?(ii) AB=?

Water pours out at the rate of Q from a tap , into a cylindrical vessel of radius r. Find THE rate at which the height of water level rises when the height is h.

A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference V esu. If e and m are charge and mass of an electron, respectively, then the value of hλ (where λ is wavelength associated with electron wave) is given by:

70.Find the effective capacitance between P and Q of the arrangement shown in the figure

a series combinattion of n1 capacitors each of value C1, is charged by a source of potentil difference 4V.WAHEN another parallel combinaton of n2 capacitors each of value C2 is charged by a source of potential difference V.

Let P(r)=(Q*r)/R4 be the charge density distribution for solid sphere of radius R & total charge Q. for a point p,inside a sphere at a distance r1from centre of sphere,the magnitude of electric field is?

Consider the situation shown in figure, the switch S open for a long time and then closed. Then work done by the battery will be:

ntA body of mass m accelerates uniformly from rest to velocity v1 in time interval T1 .The instantaneous power delivered to the body as a function of time t is ?n

If y=cosx3, then find dydx at x=0

Write name and symbol of each variable of a gas.

how to find static friction?

Find the average angular speed of the minute hand of a normal clock in 1.5 hrs.

2/459.Moment of inertia of a solid hemi-sphere ofmass m, radius R about the axis which isparallel to its diameter (as shown in figure).CM3R/8(1)mR2(2)mR21(3)mR2(4)mR2

the accerlation a of a particle in m\backslash s is given by a=(2t^2+3t+5) ,where t is the time .if the velocity of the particle at t=0,was 2m\backslash s,then calcaluate its velocity at t=3

A hollow sphere of mass 50 kg and radius 5 cm is rotated about one of its diameter. The rotational inertia of hollow sphere about this axis is.

Why is change in magnitude of velocity in circular motion is 2vsinx/2? Here x= angle swept.

A particle is projected from ground with speed 80m/s at an angle 30 degree with horizontal from ground. The magnitude of average velocity of particle in time interval t= 2s to t = 6s. Is??