50278 + Interview Questions in Physics

1.	A boat, which has a speed of 5 km/h in still water, crosses a river of width 1 km along the shortest possible path in 15 minutes. What is the magnitude of velocity of the river water?
Answer» A boat, which has a speed of $5 k m / h$ in still water, crosses a river of width $1 k m$ along the shortest possible path in $15 minutes$ . What is the magnitude of velocity of the river water?

Discussion

2.	Why potentiometer is better device than voltmeter for measuring potential difference
Answer» Why potentiometer is better device than voltmeter for measuring potential difference

Discussion

3.	Why coulambian force formula to find out magnitude of force is only applied on static point charges ??? Why is it not applicable for charges is in motion ?
Answer» Why coulambian force formula to find out magnitude of force is only applied on static point charges ??? Why is it not applicable for charges is in motion ?

Discussion

4.	Find the magnetic induction of the field at the point O of a loop with current I, whose shape is illustrated in the figure.
Answer» Find the magnetic induction of the field at the point O of a loop with current I, whose shape is illustrated in the figure.

Discussion

5.	A rod of length L is hinged at one end and is rotated with constant angular velocity in horizontal plane.Let T1 and T2 be tensions at L/4 and 3L/4 away from hinged end .....then T1>T2 T1=T2 T1<T2
Answer» A rod of length L is hinged at one end and is rotated with constant angular velocity in horizontal plane.Let T₁and T_{2 be tensions at L/4 and 3L/4 away from hinged end .....then T1>T2 T1=T2 T1<T2}

Discussion

6.	Which of the following units is used to express frequency?
Answer» Which of the following units is used to express frequency?

Discussion

7.	What is the meaning of frequency of small amplitude oscillations ?
Answer» What is the meaning of frequency of small amplitude oscillations ?

Discussion

8.	Are physical quantities and dimensions the same thing?
Answer» Are physical quantities and dimensions the same thing?

Discussion

9.	An enclosure of volume V contains a mixture of 8g of oxygen, 14g of nitrogen and 22g of carbon dioxide at absolute temperature T. The pressure of the mixture of gases is (R is universal gas constant)
Answer» An enclosure of volume V contains a mixture of 8g of oxygen, 14g of nitrogen and 22g of carbon dioxide at absolute temperature T. The pressure of the mixture of gases is (R is universal gas constant)

Discussion

10.	How electron hole pairs are generated in p-n junction ?
Answer» How electron hole pairs are generated in p-n junction ?

Discussion

11.	When a glass prism of refracting angle 60∘ is immersed in a liquid, its angle of minimum deviation is 30∘. The critical angle of glass with respect to the liquid medium is
Answer» When a glass prism of refracting angle $60^{\circ}$ is immersed in a liquid, its angle of minimum deviation is $30^{\circ}$ . The critical angle of glass with respect to the liquid medium is

Discussion

12.	Direction of electron
Answer» Direction of electron

Discussion

13.	Equation of a body in S.H.M is x= 5 cos (3Ï€t+Ï€/3). Its amplitude and velocity at t=2s would be
Answer» Equation of a body in S.H.M is x= 5 cos (3Ï€t+Ï€/3). Its amplitude and velocity at t=2s would be

Discussion

14.	Calculate the area bounded by curve y=x and x-axis from x = 1 to √5 .
Answer» Calculate the area bounded by curve $y = x$ and x-axis from x = 1 to $\sqrt{5}$ .

Discussion

15.	Angular momentum of a body is the product of
Answer» Angular momentum of a body is the product of

Discussion

16.	The series combination of resistance R and inductance L is connected to an alternating source of e.m.f. E=311sin(100πt). If the peak value of wattless current is 0.5 A and the impedance of the circuit is 311 Ω, the power factor will be
Answer» The series combination of resistance $R$ and inductance $L$ is connected to an alternating source of e.m.f. $E = 311 sin (100 π t)$ . If the peak value of wattless current is $0.5 A$ and the impedance of the circuit is $311 Ω$ , the power factor will be

Discussion

17.	Fg and Ferepresents gravitational and electrostatic force respectively between electrons situated at a distance 10 cm. The ratio of FgFe is of the order of
Answer» $F_{g}$ and $F_{e}$ represents gravitational and electrostatic force respectively between electrons situated at a distance 10 cm. The ratio of $\frac{F_{g}}{F_{e}}$ is of the order of

Discussion

18.	A particle has simple harmonic motion. The equation of its motion is x = 5 sin (4t−π6) , where x is its displacement. If the displacement of the particle is 3 units, then it velocity is [MP PMT 1994]
Answer» A particle has simple harmonic motion. The equation of its motion is x = 5 sin $(4 t - \frac{π}{6})$ , where x is its displacement. If the displacement of the particle is 3 units, then it velocity is [MP PMT 1994]

18.

A particle has simple harmonic motion. The equation of its motion is x = 5 sin (4t−π6) , where x is its displacement. If the displacement of the particle is 3 units, then it velocity is [MP PMT 1994]

Answer»

A particle has simple harmonic motion. The equation of its motion is

x = 5 sin $(4 t - \frac{π}{6})$ , where x is its displacement. If the displacement of the

particle is 3 units, then it velocity is

[MP PMT 1994]

Discussion

19.	A body dropped from the top of a tower covers a distance 7x in the last second of its journey where x is the distance covered in first second. How much time does it take to reach the ground (Take g=10 m/s2)?
Answer» A body dropped from the top of a tower covers a distance $7 x$ in the last second of its journey where $x$ is the distance covered in first second. How much time does it take to reach the ground (Take $g = 10 {m / s}^{2}$ )?

Discussion

20.	A body of mass m is moving in a circle of radius r with a constant speed v. The force on the body is mv2rand is directed towards the centre. What is the work done by this force in moving the body over half the circumference of the circle
Answer» A body of mass m is moving in a circle of radius r with a constant speed v. The force on the body is $\frac{m v^{2}}{r}$ and is directed towards the centre. What is the work done by this force in moving the body over half the circumference of the circle

Discussion

21.	Two bodies move toward each other from 10 m apart with a constant velocity they meet at C after 2s. What is the displacement of A w.r.t. B?
Answer» Two bodies move toward each other from 10 m apart with a constant velocity they meet at C after 2s. What is the displacement of A w.r.t. B?

Discussion

22.	Two speakers S1 and S2 are derived from the same amplifier and placed at the same distance from x-axis as shown in figure. The speakers vibrate in phase at 680 Hz. A man stands at a point on the x-axis at a very large distance from the origin and starts moving parallel to the y-axis. The speed of sound is 340 m/s. Then, at what angle θ with the x− axis will the intensity of sound drop to a minimum for the first time?
Answer» Two speakers $S_{1} and S_{2}$ are derived from the same amplifier and placed at the same distance from $x$ -axis as shown in figure. The speakers vibrate in phase at $680 Hz$ . A man stands at a point on the $x$ -axis at a very large distance from the origin and starts moving parallel to the $y$ -axis. The speed of sound is $340 m/s$ . Then, at what angle $θ$ with the $x -$ axis will the intensity of sound drop to a minimum for the first time?

Discussion

23.	he area of the region (in the square unit) bounded by the curve x2=4y, line x=2 and x-axis is
Answer» he area of the region (in the square unit) bounded by the curve $x^{2} = 4 y$ , line x=2 and x-axis is

Discussion

24.	A smooth uniform rod of length L and mass M has two identical beads of negligible size, each of mass m, which can slide freely along the rod. Initially the two beads are at the centre of the rod and the system is rotating with an angular velocity ω0 about an axis perpendicular to the rod and passing through the mid-point of the rod (see figure). There are no external forces. When the beads reach the ends of the rod, the angular velocity of the system is
Answer» A smooth uniform rod of length $L$ and mass $M$ has two identical beads of negligible size, each of mass $m$ , which can slide freely along the rod. Initially the two beads are at the centre of the rod and the system is rotating with an angular velocity $ω_{0}$ about an axis perpendicular to the rod and passing through the mid-point of the rod (see figure). There are no external forces. When the beads reach the ends of the rod, the angular velocity of the system is

Discussion

25.	A 5 mm high pin is placed at a distance of 15 cm from a convex lens of focal length 1.0 cm. A second lens of focal length 5 cm is placed 40 cm from the first lens and 55 cm from the pin. Find (a) the position of the final image, (b) its nature and (c) its size.
Answer» A 5 mm high pin is placed at a distance of 15 cm from a convex lens of focal length 1.0 cm. A second lens of focal length 5 cm is placed 40 cm from the first lens and 55 cm from the pin. Find (a) the position of the final image, (b) its nature and (c) its size.

25.

A 5 mm high pin is placed at a distance of 15 cm from a convex lens of focal length 1.0 cm. A second lens of focal length 5 cm is placed 40 cm from the first lens and 55 cm from the pin. Find (a) the position of the final image, (b) its nature and (c) its size.

Answer»

A 5 mm high pin is placed at a distance of 15 cm from a convex lens of focal length 1.0 cm. A second lens of focal length 5 cm is placed 40 cm from the first lens and 55 cm from the pin. Find

(a) the position of the final image,

(b) its nature and

(c) its size.

Discussion

26.	A hollow sphere is released from the top of an inclined plane of inclination θ. (a) What should be the minimum coefficient of friction between the sphere and the plane to prevent sliding ? (b) Find the kinetic energy of the ball as it moves down a length l on the incline if the friction coefficient is half the value calculated in part (a).
Answer» A hollow sphere is released from the top of an inclined plane of inclination $θ$ . (a) What should be the minimum coefficient of friction between the sphere and the plane to prevent sliding ? (b) Find the kinetic energy of the ball as it moves down a length l on the incline if the friction coefficient is half the value calculated in part (a).

Discussion

27.	A small block B is placed on another block A of mass 5 kg and length 20 cm. Initially the block B is near the right end of block A Figure. A constant horizontal force of 10 N is applied to the block A. All the surfaces are assumed frictionless. Find the time elapsed before the block B separates from A.
Answer» A small block B is placed on another block A of mass 5 kg and length 20 cm. Initially the block B is near the right end of block A Figure. A constant horizontal force of 10 N is applied to the block A. All the surfaces are assumed frictionless. Find the time elapsed before the block B separates from A.

Discussion

28.	A radioactive nucleus of mass number A, initially at rest, emits an α - particle with a speed v. What will be the recoil speed of the daughter nucleus?
Answer» A radioactive nucleus of mass number A, initially at rest, emits an $α$ - particle with a speed v. What will be the recoil speed of the daughter nucleus?

Discussion

29.	Which represents NAND gate
Answer» Which represents NAND gate

Discussion

30.	State true or false: A series circuit has one conducting path for the flow of electrons while a parallel.
Answer» State true or false: A series circuit has one conducting path for the flow of electrons while a parallel.

Discussion

31.	In purely inductive circuits, the current:
Answer» In purely inductive circuits, the current:

Discussion

32.	A boy is standing on a lorry that is going at a constant velocity of v m/s. He is playing with a ball. He throws it right up from his position with a velocity of 20m/s , how far behind the lorry will the ball land?(Ignore air drag)
Answer» A boy is standing on a lorry that is going at a constant velocity of v m/s. He is playing with a ball. He throws it right up from his position with a velocity of 20m/s , how far behind the lorry will the ball land?(Ignore air drag)

Discussion

33.	Two sources of same intensity interfere at a point constructively to produce an intensity I. When one source is removed, what will be the intensity at that point?
Answer» Two sources of same intensity interfere at a point constructively to produce an intensity I. When one source is removed, what will be the intensity at that point?

Discussion

34.	1. The wind had savage allies. A. If it had not been for my closely fitted helmet, the explosions might have shattered my eardrums. B. The first clap of thunder came as a deafening explosion that literally shook my teeth. C. I did not hear the thunder I actually felt it – an almost unbearable physical experience. D. I saw lightning all around me in every shape imaginable. 6. It was raining so torrentially that I thought I would drown in mid-air.
Answer» 1. The wind had savage allies. A. If it had not been for my closely fitted helmet, the explosions might have shattered my eardrums. B. The first clap of thunder came as a deafening explosion that literally shook my teeth. C. I did not hear the thunder I actually felt it – an almost unbearable physical experience. D. I saw lightning all around me in every shape imaginable. 6. It was raining so torrentially that I thought I would drown in mid-air.

Discussion

35.	A molecule with dipole moment ‘p’ is placed in an electric field of strength E. Initially the dipole is aligned parallel to the field. If the dipole is to be rotated to be antiparallel to the field, the work required to be done by an external agency is:
Answer» A molecule with dipole moment ‘p’ is placed in an electric field of strength E. Initially the dipole is aligned parallel to the field. If the dipole is to be rotated to be antiparallel to the field, the work required to be done by an external agency is:

Discussion

36.	A copper wire of length l is bent into a semicircle. It is moved with a velocity v in a region where magnetic field is uniform and perpendicular to the plane of the wire. If the strength of the field is B then emf induced
Answer» A copper wire of length l is bent into a semicircle. It is moved with a velocity v in a region where magnetic field is uniform and perpendicular to the plane of the wire. If the strength of the field is B then emf induced

Discussion

37.	The position of a body is given by the equation: s=3t2+4t. What is the value of of its acceleration?
Answer» The position of a body is given by the equation: $s = 3 t^{2} + 4 t$ . What is the value of of its acceleration?

Discussion

38.	A uniform disc of radius R having charge Q distributed uniformly all over its surface is placed on a smooth horizontal surface. A magnetic field B=Kxt2, where K= constant, x is the distance (in metre) from the centre of the disc and t is the time (in second), is switched on which is perpendicular to the plane of the disc. The torque (in Nm) acting on the disc after 15 sec is (Take 2 KQ=1 S.I. unit and R=1 metre)
Answer» A uniform disc of radius $R$ having charge $Q$ distributed uniformly all over its surface is placed on a smooth horizontal surface. A magnetic field $B = K x t^{2}$ , where $K =$ constant, $x$ is the distance (in metre) from the centre of the disc and $t$ is the time (in second), is switched on which is perpendicular to the plane of the disc. The torque (in $Nm$ ) acting on the disc after $15 sec$ is (Take $2 K Q = 1$ S.I. unit and $R = 1$ metre)

Discussion

39.	A block of mass M is tied to one end of a massless rope. The other end of the rope is in the hands of a man of mass 2M as shown in Fig. The block and the man are resting on a rough wedge of mass M. The whole system is resting on a smooth horizontal surface. The man starts walking towards right while holding the rope in his hands. Pulley is massless and frictionless. Find the displacement (in m) of the wedge when the block meets the pulley. Assume wedge is sufficiently long so that man does not fall down.
Answer» A block of mass M is tied to one end of a massless rope. The other end of the rope is in the hands of a man of mass 2M as shown in Fig. The block and the man are resting on a rough wedge of mass M. The whole system is resting on a smooth horizontal surface. The man starts walking towards right while holding the rope in his hands. Pulley is massless and frictionless. Find the displacement (in m) of the wedge when the block meets the pulley. Assume wedge is sufficiently long so that man does not fall down.

Discussion

40.	Two particles are executing S.H.M of the same amplitude of 20 cm with the same period along the same line about the same equilibrium position. The maximum distance between the two is 20 cm. Their phase difference (in radians) is equal to
Answer» Two particles are executing S.H.M of the same amplitude of $20 cm$ with the same period along the same line about the same equilibrium position. The maximum distance between the two is $20 cm$ . Their phase difference (in radians) is equal to

Discussion

41.	When the temperature of a rod increases from T to T+ΔT, the moment of inertia of the rod about an axis increases from I to I+ΔI. If the coefficient of linear expansion of rod is α, then find the ratio ΔII
Answer» When the temperature of a rod increases from $T$ to $T + Δ T$ , the moment of inertia of the rod about an axis increases from $I$ to $I + Δ I$ . If the coefficient of linear expansion of rod is $α$ , then find the ratio $\frac{Δ I}{I}$

Discussion

42.	If T is the total time of flight, h is the maximum height & R is the range for horizontal motion, the x and y co-ordinates of projectile motion and time t are related as:
Answer» If $T$ is the total time of flight, $h$ is the maximum height & $R$ is the range for horizontal motion, the $x$ and $y$ co-ordinates of projectile motion and time $t$ are related as:

Discussion

43.	A plano convex lens fits exactly into a plano concave lens. Their plane surface are parallel to each other. If the refractive indices are μ1 and μ2 and R is the radius of curvature the focal length of the combination is
Answer» A plano convex lens fits exactly into a plano concave lens. Their plane surface are parallel to each other. If the refractive indices are $μ_{1}$ and $μ_{2}$ and R is the radius of curvature the focal length of the combination is

Discussion

44.	The kinetic energy K of a rotating body depends on its moment of inertia I and its angular speed ω. Assuming the relation to be K=kIaωb where k is a dimensionless constant, find a and b. Moment of inertia of a sphere about its diameter is 25Mr2.
Answer» The kinetic energy K of a rotating body depends on its moment of inertia I and its angular speed $ω$ . Assuming the relation to be $K = k I^{a} ω^{b}$ where k is a dimensionless constant, find a and b. Moment of inertia of a sphere about its diameter is $\frac{2}{5} M r^{2}$ .

Discussion

45.	One mole of Ideal Gas Expands freely at 310 K from 5L Volume to 10L volume. Then ΔU and ΔH of the process are respectively
Answer» One mole of Ideal Gas Expands freely at 310 K from 5L Volume to 10L volume. Then $Δ U$ and $Δ H$ of the process are respectively

Discussion

46.	A ring of mass M and radius R is rotating with angular speed ω about a fixed vertical axis passing through its centre O with two point masses each of mass M8 at rest at O. These masses can move radially outwards along two massless rods fixed on the ring as shown int he figure. At some instant the angular speed of the system is \frac{3}{5}R from O. At this instant the distance of the other mass from O is:
Answer» A ring of mass M and radius R is rotating with angular speed $ω$ about a fixed vertical axis passing through its centre O with two point masses each of mass $\frac{M}{8}$ at rest at O. These masses can move radially outwards along two massless rods fixed on the ring as shown int he figure. At some instant the angular speed of the system is \frac{3}{5}R from O. At this instant the distance of the other mass from O is:

Discussion

47.	When a capillary is dipped in water, water rises to a height h. If the length of the capillary is made less than h, then
Answer» When a capillary is dipped in water, water rises to a height h. If the length of the capillary is made less than h, then

Discussion

48.	Equation of a progressive wave is given by y=0.2cos π⟮0.04t + .02x − π6⟯ The distance is expressed in cm and time in second. What will be the minimum distance between two particles having the phase difference of p/2
Answer» Equation of a progressive wave is given by $y = 0.2 c o s π ⟮ 0.04 t + .02 x - \frac{π}{6} ⟯$ The distance is expressed in cm and time in second. What will be the minimum distance between two particles having the phase difference of p/2

48.

Equation of a progressive wave is given by y=0.2cos π⟮0.04t + .02x − π6⟯ The distance is expressed in cm and time in second. What will be the minimum distance between two particles having the phase difference of p/2

Answer»

Equation of a progressive wave is given by

$y = 0.2 c o s π ⟮ 0.04 t + .02 x - \frac{π}{6} ⟯$

The distance is expressed in cm and time in second. What will be the minimum distance between two particles having the phase difference of p/2

Discussion

49.	MOI of a circular ring of radius R about the line passing through its centre of mass in the plane of circle is I. Find the MOI of ring about a line passing through its COM and perpendicular to its plane.
Answer» $MOI$ of a circular ring of radius $R$ about the line passing through its centre of mass in the plane of circle is $I$ . Find the $MOI$ of ring about a line passing through its $COM$ and perpendicular to its plane.

Discussion

50.	Find the acceleration of the two blocks of mass 4 kg & 5 kg, if a force of 40 N is applied on 4 kg block. Friction coefficient between the respective surfaces are shown in figure. (take g=10 m/s2).
Answer» Find the acceleration of the two blocks of mass $4 kg$ & $5 kg,$ if a force of $40 N$ is applied on $4 kg$ block. Friction coefficient between the respective surfaces are shown in figure. (take $g = 10 {m/s}^{2}$ ).

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A boat, which has a speed of 5 km/h in still water, crosses a river of width 1 km along the shortest possible path in 15 minutes. What is the magnitude of velocity of the river water?

Why potentiometer is better device than voltmeter for measuring potential difference

Why coulambian force formula to find out magnitude of force is only applied on static point charges ??? Why is it not applicable for charges is in motion ?

Find the magnetic induction of the field at the point O of a loop with current I, whose shape is illustrated in the figure.

A rod of length L is hinged at one end and is rotated with constant angular velocity in horizontal plane.Let T1 and T2 be tensions at L/4 and 3L/4 away from hinged end .....then T1&gt;T2 T1=T2 T1&lt;T2

Which of the following units is used to express frequency?

What is the meaning of frequency of small amplitude oscillations ?

Are physical quantities and dimensions the same thing?

An enclosure of volume V contains a mixture of 8g of oxygen, 14g of nitrogen and 22g of carbon dioxide at absolute temperature T. The pressure of the mixture of gases is (R is universal gas constant)

How electron hole pairs are generated in p-n junction ?

When a glass prism of refracting angle 60∘ is immersed in a liquid, its angle of minimum deviation is 30∘. The critical angle of glass with respect to the liquid medium is

Direction of electron

Equation of a body in S.H.M is x= 5 cos (3Ï€t+Ï€/3). Its amplitude and velocity at t=2s would be

Calculate the area bounded by curve y=x and x-axis from x = 1 to √5 .

Angular momentum of a body is the product of

The series combination of resistance R and inductance L is connected to an alternating source of e.m.f. E=311sin(100πt). If the peak value of wattless current is 0.5 A and the impedance of the circuit is 311 Ω, the power factor will be

Fg and Ferepresents gravitational and electrostatic force respectively between electrons situated at a distance 10 cm. The ratio of FgFe is of the order of

A particle has simple harmonic motion. The equation of its motion is x = 5 sin (4t−π6) , where x is its displacement. If the displacement of the particle is 3 units, then it velocity is [MP PMT 1994]

A body dropped from the top of a tower covers a distance 7x in the last second of its journey where x is the distance covered in first second. How much time does it take to reach the ground (Take g=10 m/s2)?

A body of mass m is moving in a circle of radius r with a constant speed v. The force on the body is mv2rand is directed towards the centre. What is the work done by this force in moving the body over half the circumference of the circle

Two bodies move toward each other from 10 m apart with a constant velocity they meet at C after 2s. What is the displacement of A w.r.t. B?

he area of the region (in the square unit) bounded by the curve x2=4y, line x=2 and x-axis is

A 5 mm high pin is placed at a distance of 15 cm from a convex lens of focal length 1.0 cm. A second lens of focal length 5 cm is placed 40 cm from the first lens and 55 cm from the pin. Find (a) the position of the final image, (b) its nature and (c) its size.

A radioactive nucleus of mass number A, initially at rest, emits an α - particle with a speed v. What will be the recoil speed of the daughter nucleus?

Which represents NAND gate

State true or false: A series circuit has one conducting path for the flow of electrons while a parallel.

In purely inductive circuits, the current:

A boy is standing on a lorry that is going at a constant velocity of v m/s. He is playing with a ball. He throws it right up from his position with a velocity of 20m/s , how far behind the lorry will the ball land?(Ignore air drag)

Two sources of same intensity interfere at a point constructively to produce an intensity I. When one source is removed, what will be the intensity at that point?

A molecule with dipole moment ‘p’ is placed in an electric field of strength E. Initially the dipole is aligned parallel to the field. If the dipole is to be rotated to be antiparallel to the field, the work required to be done by an external agency is:

A copper wire of length l is bent into a semicircle. It is moved with a velocity v in a region where magnetic field is uniform and perpendicular to the plane of the wire. If the strength of the field is B then emf induced

The position of a body is given by the equation: s=3t2+4t. What is the value of of its acceleration?

Two particles are executing S.H.M of the same amplitude of 20 cm with the same period along the same line about the same equilibrium position. The maximum distance between the two is 20 cm. Their phase difference (in radians) is equal to

When the temperature of a rod increases from T to T+ΔT, the moment of inertia of the rod about an axis increases from I to I+ΔI. If the coefficient of linear expansion of rod is α, then find the ratio ΔII

If T is the total time of flight, h is the maximum height &amp; R is the range for horizontal motion, the x and y co-ordinates of projectile motion and time t are related as:

A plano convex lens fits exactly into a plano concave lens. Their plane surface are parallel to each other. If the refractive indices are μ1 and μ2 and R is the radius of curvature the focal length of the combination is

The kinetic energy K of a rotating body depends on its moment of inertia I and its angular speed ω. Assuming the relation to be K=kIaωb where k is a dimensionless constant, find a and b. Moment of inertia of a sphere about its diameter is 25Mr2.

One mole of Ideal Gas Expands freely at 310 K from 5L Volume to 10L volume. Then ΔU and ΔH of the process are respectively

When a capillary is dipped in water, water rises to a height h. If the length of the capillary is made less than h, then

Equation of a progressive wave is given by y=0.2cos π⟮0.04t + .02x − π6⟯ The distance is expressed in cm and time in second. What will be the minimum distance between two particles having the phase difference of p/2

MOI of a circular ring of radius R about the line passing through its centre of mass in the plane of circle is I. Find the MOI of ring about a line passing through its COM and perpendicular to its plane.

Find the acceleration of the two blocks of mass 4 kg &amp; 5 kg, if a force of 40 N is applied on 4 kg block. Friction coefficient between the respective surfaces are shown in figure. (take g=10 m/s2).

A rod of length L is hinged at one end and is rotated with constant angular velocity in horizontal plane.Let T1 and T2 be tensions at L/4 and 3L/4 away from hinged end .....then T1>T2 T1=T2 T1<T2

If T is the total time of flight, h is the maximum height & R is the range for horizontal motion, the x and y co-ordinates of projectile motion and time t are related as:

Find the acceleration of the two blocks of mass 4 kg & 5 kg, if a force of 40 N is applied on 4 kg block. Friction coefficient between the respective surfaces are shown in figure. (take g=10 m/s2).