50278 + Interview Questions in Physics

1.	The maximum deflection of a fixed beam carrying a central load W is equal to
Answer» The maximum deflection of a fixed beam carrying a central load W is equal to

Discussion

2.	Two pith balls carrying identical charges are suspended from a common point by strings of equal lengths, the equilibrium separation between them is r. Now the strings are rigidly clamped at half the height. The equilibrium separation between the balls now will be :
Answer» Two pith balls carrying identical charges are suspended from a common point by strings of equal lengths, the equilibrium separation between them is $r$ . Now the strings are rigidly clamped at half the height. The equilibrium separation between the balls now will be :

Discussion

3.	A uniform electric field of magnitude 100 V/m in space is directed along the line y=3+x. Find the potential difference (in V) between points A(3,1) and B(1,3).
Answer» A uniform electric field of magnitude $100 V/m$ in space is directed along the line $y = 3 + x$ . Find the potential difference (in $V$ ) between points $A (3, 1)$ and $B (1, 3)$ .

Discussion

4.	Which of the following expressions represent simple harmonic motion?
Answer» Which of the following expressions represent simple harmonic motion?

Discussion

5.	As the sir said that he will teach the extent version of dimensions analysis but there is no vedio about it Please share the the information to me
Answer» As the sir said that he will teach the extent version of dimensions analysis but there is no vedio about it Please share the the information to me

5.

As the sir said that he will teach the extent version of dimensions analysis but there is no vedio about it Please share the the information to me

Answer»

As the sir said that he will teach the extent version of dimensions analysis but there is no vedio about it

Please share the the information to me

Discussion

6.	A convex mirror of focal length f forms an image whose size is 1n times that of the real object. The distance of the object from the mirror is
Answer» A convex mirror of focal length $f$ forms an image whose size is $\frac{1}{n}$ times that of the real object. The distance of the object from the mirror is

Discussion

7.	Position x of a moving particle with time t is given by x= 6(t-e^{-2t}). Initial and final velocity of the particle will be respectively (1) 6m/s and 12m/s (2) 6m/s and 18m/s (3) 18m/s and 12m/s (4) 18m/s and 6m/s
Answer» Position x of a moving particle with time t is given by x= 6(t-e^{-2t}). Initial and final velocity of the particle will be respectively (1) 6m/s and 12m/s (2) 6m/s and 18m/s (3) 18m/s and 12m/s (4) 18m/s and 6m/s

Discussion

8.	A cylindrical rod has a hot end at 70∘C and cold end at 30∘C. The rate of heat flow is 9 W. If the dimensions of the cylindrical rod are tripled keeping the temperature difference constant, then find the value of new rate of heat flow.
Answer» A cylindrical rod has a hot end at $70^{\circ} C$ and cold end at $30^{\circ} C$ . The rate of heat flow is $9 W$ . If the dimensions of the cylindrical rod are tripled keeping the temperature difference constant, then find the value of new rate of heat flow.

Discussion

9.	With the decrease of current in the primary coil from 2 A to 0 A in 0.01 s. The e.m.f. generated in the secondary coil is 1000 V. The mutual inductance between the two coil's is-
Answer» With the decrease of current in the primary coil from $2 A$ to $0 A$ in $0.01 s .$ The e.m.f. generated in the secondary coil is $1000 V .$ The mutual inductance between the two coil's is-

Discussion

10.	Find the magnetic field at point O due to a conductor of length (√3+1)a carrying current I at a distance of a from the wire as shown in figure.
Answer» Find the magnetic field at point $O$ due to a conductor of length $(\sqrt{3} + 1) a$ carrying current $I$ at a distance of $a$ from the wire as shown in figure.

Discussion

11.	A thin rod of length L is bent to form a semicircle. The mass of rod is M. What will be the gravitational potential at the centre of the circle?
Answer» A thin rod of length $L$ is bent to form a semicircle. The mass of rod is $M$ . What will be the gravitational potential at the centre of the circle?

Discussion

12.	The figure shows an RC circuit with a parallel plate capacitor. Before switching on circuit, plate A of capacitor has a charge −Q0 while plate B has no net charge. Now at t=0, the circuit is switched on. Find How much time will elapse before the net charge on plate A (in sec) becomes zero.[ Given: C=1 μF, Q0=1 mC, E=1000 V and R=2×106ln3 Ω]
Answer» The figure shows an $RC$ circuit with a parallel plate capacitor. Before switching on circuit, plate $A$ of capacitor has a charge $- Q_{0}$ while plate $B$ has no net charge. Now at $t = 0$ , the circuit is switched on. Find How much time will elapse before the net charge on plate $A$ (in $sec$ ) becomes zero. $[$ Given: $C = 1 μ F, Q_{0} = 1 mC, E = 1000 V$ and $R = \frac{2 \times 10^{6}}{ln 3} Ω]$

Discussion

13.	(a) Draw a ray diagram for the formation of image by a compound microscope. (b) You are given the following three lenses. Which two lenses will you use as an eyepiece and as an objective to constuct a compound microscope? LensesPower (D)Aperture(cm)L138L261L3101 (c) Define resolving power of a microscope and write one factor on which it depends.
Answer» (a) Draw a ray diagram for the formation of image by a compound microscope. (b) You are given the following three lenses. Which two lenses will you use as an eyepiece and as an objective to constuct a compound microscope? $\begin{matrix} Lenses & Power (D) & Aperture(cm) L_{1} & 3 & 8 L_{2} & 6 & 1 L_{3} & 10 & 1 \end{matrix}$ (c) Define resolving power of a microscope and write one factor on which it depends.

Discussion

14.	The series of two batteries, both of the same emf 10 V, but different internal resitance of 20 Ω and 5 Ω, is connected to the parallel combination of two resistors 30 Ω and R Ω. The voltage difference across the battery of internal resistance 20 Ω is zero, the value of R (in Ω) is
Answer» The series of two batteries, both of the same emf $10 V$ , but different internal resitance of $20 Ω$ and $5 Ω$ , is connected to the parallel combination of two resistors $30 Ω$ and $R Ω$ . The voltage difference across the battery of internal resistance $20 Ω$ is zero, the value of $R$ (in $Ω$ ) is

Discussion

15.	A car travelling at 60 km/h overtake another car travelling at 42 km/h. Assuming each car to be 5m long, find the time taken during the overtake and the total road distance used for the overtake.
Answer» A car travelling at 60 km/h overtake another car travelling at 42 km/h. Assuming each car to be 5m long, find the time taken during the overtake and the total road distance used for the overtake.

Discussion

16.	In the balanced condition, the values of the resistances of the four arms of a Wheatstone bridge are shown in the figure below. The resistance R3 has temperature coefficient 0.0004∘C−1. If the temperature of R3 is increased by 100∘C−1, the voltage developed between S and T will be ______ volt.
Answer» In the balanced condition, the values of the resistances of the four arms of a Wheatstone bridge are shown in the figure below. The resistance $R_{3}$ has temperature coefficient ${0.0004}^{\circ} C^{- 1}$ . If the temperature of $R_{3}$ is increased by $100^{\circ} C^{- 1}$ , the voltage developed between $S$ and $T$ will be ______ $volt$ .

Discussion

17.	Eight identical resistances r are connected as shown in figure. Find equivalent resistance between A and D.
Answer» Eight identical resistances $r$ are connected as shown in figure. Find equivalent resistance between $A$ and $D$ .

Discussion

18.	At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image of 24 cm from it on the other side what will be the magnification produced in this case and image distance is ____________
Answer» At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image of 24 cm from it on the other side what will be the magnification produced in this case and image distance is ____________

Discussion

19.	16.How to apply gauss theorem in infinitely long linear charge distribution
Answer» 16.How to apply gauss theorem in infinitely long linear charge distribution

Discussion

20.	It is advised to keep the magnets away from television, mobiles, CD and computers. Explain why?
Answer» It is advised to keep the magnets away from television, mobiles, CD and computers. Explain why?

Discussion

21.	Colour code of a carbon resistor is given as below.The value of resistance and tolerance respectively, are
Answer» Colour code of a carbon resistor is given as below. The value of resistance and tolerance respectively, are

Discussion

22.	Let →a=α^i+2^j−3^k,→b=^i+2α^j−2^k and →c=2^i−α^j+^k and {(→a×→b)×(→b×→c)}×(→c×→a)=→0, then the value of 6α is
Answer» Let $\to a = α^i + 2^j - 3^k, \to b =^i + 2 α^j - 2^k$ and $\to c = 2^i - α^j +^k$ and ${(\to a \times \to b) \times (\to b \times \to c)} \times (\to c \times \to a) = \to 0,$ then the value of $6 α$ is

Discussion

23.	A 2 m-long string fixed at both ends is set into vibrations in its first overtone. The wave speed on the string is 200 ms−1 and the amplitude is 0.5 cm. Write the equation giving the displacement of different points as a function of time. Choose the X-axis along the string with the origin at one end and t = 0 at the instant when the point x = 50 cm has reached its maximum displacement.
Answer» A 2 m-long string fixed at both ends is set into vibrations in its first overtone. The wave speed on the string is $200 m s^{- 1}$ and the amplitude is 0.5 cm. Write the equation giving the displacement of different points as a function of time. Choose the X-axis along the string with the origin at one end and t = 0 at the instant when the point x = 50 cm has reached its maximum displacement.

Discussion

24.	A cylindrical tube, open at both ends, has a fundamental frequency f0, in air. The tube is dipped vertically into water such that half of its length is inside water. The fundamental frequency of the air column now is
Answer» A cylindrical tube, open at both ends, has a fundamental frequency $f_{0}$ , in air. The tube is dipped vertically into water such that half of its length is inside water. The fundamental frequency of the air column now is

Discussion

25.	Representing stopping potential V along y-axis and 1/λ along x-axis for a given photocathode of work function ω_{°. }The curve is a straight line , the intercept on x-axis is equal to 1) ω_°/hc 2)hc/ω_° 3)ω_° c/h 4)
Answer» Representing stopping potential V along y-axis and 1/λ along x-axis for a given photocathode of work function ω_{°. }The curve is a straight line , the intercept on x-axis is equal to 1) ω_°/hc 2)hc/ω_° 3)ω_° c/h 4)

Discussion

26.	A regular n sided polygon is made from a uniform wire of resistance R. Given n is even, find the resistance of the polygon between any two adjacent corners.
Answer» A regular $n$ sided polygon is made from a uniform wire of resistance $R$ . Given $n$ is even, find the resistance of the polygon between any two adjacent corners.

Discussion

27.	If U1, U2 represents "change in potential energy" of a body with mass m moving from A to B along two different paths 1, & 2 (as shown in the figure) in the gravitational field. Then
Answer» If $U_{1}, U_{2}$ represents "change in potential energy" of a body with mass $m$ moving from $A$ to $B$ along two different paths $1$ , & $2$ (as shown in the figure) in the gravitational field. Then

Discussion

28.	(a) Three resistors 2 W, 4 W and 5 W are combined in parallel. Whatis the total resistance of the combination? (b) If the combination is connected to a battery of emf 20 V andnegligible internal resistance, determine the current througheach resistor, and the total current drawn from the battery.
Answer» (a) Three resistors 2 W, 4 W and 5 W are combined in parallel. Whatis the total resistance of the combination? (b) If the combination is connected to a battery of emf 20 V andnegligible internal resistance, determine the current througheach resistor, and the total current drawn from the battery.

Discussion

29.	33/ A block is projected with speed 20 m/s on a roughhorizontal surface. The coefficient of friction (u)between the surfaces varies with time () as showin figure. The speed of body at the end of 4 secondwill be (g = 10 m/s2)0.50.3ts)2(1) 2 m/s(2) 5 m/s(3) 7.2 m/s(4) 9.5 m/s
Answer» 33/ A block is projected with speed 20 m/s on a roughhorizontal surface. The coefficient of friction (u)between the surfaces varies with time () as showin figure. The speed of body at the end of 4 secondwill be (g = 10 m/s2)0.50.3ts)2(1) 2 m/s(2) 5 m/s(3) 7.2 m/s(4) 9.5 m/s

Discussion

30.	A train, standing at the outer signal of a railway station blows a whistle of frequency 400 Hz in still air. (i) What is the frequency of the whistle for a platform observer when the train (a) approaches the platform with a speed of 10ms−1 , (b) recedes from the platform with a speed of 10ms−1 ? (ii) What is the speed of sound in each case? The speed of sound in still air can be taken as 340ms−1
Answer» A train, standing at the outer signal of a railway station blows a whistle of frequency 400 Hz in still air. (i) What is the frequency of the whistle for a platform observer when the train (a) approaches the platform with a speed of $10 m s^{- 1}$ , (b) recedes from the platform with a speed of $10 m s^{- 1}$ ? (ii) What is the speed of sound in each case? The speed of sound in still air can be taken as $340 m s^{- 1}$

Discussion

31.	A toy rocket of mass 0.1kg has fuel of mass 0.02kg which burns out in 3sec. Starting from rest on a horizontal smooth track, it gets a speed of 20 m/s when fuel is burned out. What is the approximate thrust of the rocket? What is the energy content per unit mass of fuel?
Answer» A toy rocket of mass 0.1kg has fuel of mass 0.02kg which burns out in 3sec. Starting from rest on a horizontal smooth track, it gets a speed of 20 m/s when fuel is burned out. What is the approximate thrust of the rocket? What is the energy content per unit mass of fuel?

Discussion

32.	Two cars A and B are moving west to east and south to north respectively along crossroads. A moves with a speed of 18 kmh−1 and is 125 m away from the point of intersection of crossroads and B moves with a speed of 13.5 kmh−1 and is 100 m away from the point of intersection of crossroads. Find the shortest distance between them (in m)
Answer» Two cars A and B are moving west to east and south to north respectively along crossroads. A moves with a speed of $18 k m h^{- 1}$ and is $125 m$ away from the point of intersection of crossroads and B moves with a speed of $13.5 k m h^{- 1}$ and is $100 m$ away from the point of intersection of crossroads. Find the shortest distance between them (in $m$ )

Discussion

33.	Cos3/13= -cos10/13
Answer» Cos3/13= -cos10/13

Discussion

34.	how to find the moment of inertia of a semi circular ring about an axis perpendicular to the plane,at centre. and also about diameter
Answer» how to find the moment of inertia of a semi circular ring about an axis perpendicular to the plane,at centre. and also about diameter

Discussion

35.	If at t=0 ,a travelling wave pulse on a string is described by the function y=6÷(x^2 + 3). what will be the wave function representing the pulse at time t, if the pulse is propagating along positive x axis with speed 4m/s. pleas explain how to solv
Answer» If at t=0 ,a travelling wave pulse on a string is described by the function y=6÷(x^2 + 3). what will be the wave function representing the pulse at time t, if the pulse is propagating along positive x axis with speed 4m/s. pleas explain how to solv

Discussion

36.	Differentiate between rod and cone cells.
Answer» Differentiate between rod and cone cells.

Discussion

37.	Electric potential is given by V=6x−8xy2−8y+6yz−4z2 then electric force acting on 2 C charge placed at origin will be
Answer» Electric potential is given by $V = 6 x - 8 x y^{2} - 8 y + 6 y z - 4 z^{2}$ then electric force acting on $2 C$ charge placed at origin will be

Discussion

38.	What is the relationship between efficiency of brayton η cycle and COP of Bell-coleman cycle?
Answer» What is the relationship between efficiency of brayton $η$ cycle and COP of Bell-coleman cycle?

Discussion

39.	In a graph between kinetic energy and momentum why is the line curved in case of P and not in case of P^{2 }?
Answer» In a graph between kinetic energy and momentum why is the line curved in case of P and not in case of P^{2 }?

Discussion

40.	If the linear momentum of a body is conserved, will it's angular momentum be conserved and vice versa ?
Answer» If the linear momentum of a body is conserved, will it's angular momentum be conserved and vice versa ?

Discussion

41.	A silicon specimen is made into a P−type semiconductor by doping, on an average, one Indium atom per 5×107silicon atoms. If the number density of atoms in the silicon specimen is 5×1028 per m3. Then the number of acceptor atoms in silicon per cubic centimetre will be,
Answer» A silicon specimen is made into a $P -$ type semiconductor by doping, on an average, one Indium atom per $5 \times 10^{7}$ silicon atoms. If the number density of atoms in the silicon specimen is $5 \times 10^{28} {per m}^{3}$ . Then the number of acceptor atoms in silicon per cubic centimetre will be,

Discussion

42.	A proton of mass 1 a.m.u. collides with a Carbon-12 nucleus (mass = 12 a.m.u.) at rest. Assuming that the collision is perfectly elastic and that the Newton’s laws of motion hold, what fraction of the proton’s kinetic energy is transferred to the Carbon nucleus? A. 144/169 B. 48/169 C. 25/169 D. 1
Answer» A proton of mass 1 a.m.u. collides with a Carbon-12 nucleus (mass = 12 a.m.u.) at rest. Assuming that the collision is perfectly elastic and that the Newton’s laws of motion hold, what fraction of the proton’s kinetic energy is transferred to the Carbon nucleus? A. 144/169 B. 48/169 C. 25/169 D. 1

Discussion

43.	A man walking on a horizontal road with a speed of 4 km/h finds rain drop fall vertically. when he reduce his speed 3km/r rain drops hit him 30 degree with vertical. the magnitude of rain with respect to ground.
Answer» A man walking on a horizontal road with a speed of 4 km/h finds rain drop fall vertically. when he reduce his speed 3km/r rain drops hit him 30 degree with vertical. the magnitude of rain with respect to ground.

Discussion

44.	Corresponding to given v-s graph of a particle moving in a straight line, Which of the following is the correct a-s graph(s is displacement, v is velocity and a is acceleration ).
Answer» Corresponding to given $v-s graph$ of a particle moving in a straight line, Which of the following is the correct $a-s graph$ $($ $s$ is displacement, $v$ is velocity and $a$ is acceleration $)$ .

Discussion

45.	From the graph between current i & voltage V shown, identify the portion corresponding to negative resistance
Answer» From the graph between current i & voltage V shown, identify the portion corresponding to negative resistance

Discussion

46.	78 How to find formal charge?
Answer» 78 How to find formal charge?

Discussion

47.	A uniform circular disc of mass 200 g and radius 4.0 cm is rotated about one of its diameter at an angular speed of 20 rad/s. Find its angular momentum ( in kg-m/s) about the axis of rotation.
Answer» A uniform circular disc of mass 200 g and radius 4.0 cm is rotated about one of its diameter at an angular speed of 20 rad/s. Find its angular momentum ( in kg-m/s) about the axis of rotation.

Discussion

48.	A body of mass M collides against a wall with a velocity v and retrates its path with the same speed. The change in momentum is??
Answer» A body of mass M collides against a wall with a velocity v and retrates its path with the same speed. The change in momentum is??

Discussion

49.	As shown in figure the tension in the horizontal cord is 20 N. The weight W and tension in the string OA in Newton are
Answer» As shown in figure the tension in the horizontal cord is 20 N. The weight W and tension in the string OA in Newton are

Discussion

50.	In a YDSE experiment if a slab whose refractive index can be varied is placed in front of one of the slits then the variation of resultant intensity at mid-point of screen with ′μ′ will be best represented by μ≥1. [Assume slits of equal width and there is no absorption by slab]
Answer» In a YDSE experiment if a slab whose refractive index can be varied is placed in front of one of the slits then the variation of resultant intensity at mid-point of screen with $^{'} μ^{'}$ will be best represented by $μ \geq 1$ . [Assume slits of equal width and there is no absorption by slab]

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The maximum deflection of a fixed beam carrying a central load W is equal to

Two pith balls carrying identical charges are suspended from a common point by strings of equal lengths, the equilibrium separation between them is r. Now the strings are rigidly clamped at half the height. The equilibrium separation between the balls now will be :

A uniform electric field of magnitude 100 V/m in space is directed along the line y=3+x. Find the potential difference (in V) between points A(3,1) and B(1,3).

Which of the following expressions represent simple harmonic motion?

As the sir said that he will teach the extent version of dimensions analysis but there is no vedio about it Please share the the information to me

A convex mirror of focal length f forms an image whose size is 1n times that of the real object. The distance of the object from the mirror is

Position x of a moving particle with time t is given by x= 6(t-e^{-2t}). Initial and final velocity of the particle will be respectively (1) 6m/s and 12m/s (2) 6m/s and 18m/s (3) 18m/s and 12m/s (4) 18m/s and 6m/s

A cylindrical rod has a hot end at 70∘C and cold end at 30∘C. The rate of heat flow is 9 W. If the dimensions of the cylindrical rod are tripled keeping the temperature difference constant, then find the value of new rate of heat flow.

With the decrease of current in the primary coil from 2 A to 0 A in 0.01 s. The e.m.f. generated in the secondary coil is 1000 V. The mutual inductance between the two coil's is-

Find the magnetic field at point O due to a conductor of length (√3+1)a carrying current I at a distance of a from the wire as shown in figure.

A thin rod of length L is bent to form a semicircle. The mass of rod is M. What will be the gravitational potential at the centre of the circle?

The series of two batteries, both of the same emf 10 V, but different internal resitance of 20 Ω and 5 Ω, is connected to the parallel combination of two resistors 30 Ω and R Ω. The voltage difference across the battery of internal resistance 20 Ω is zero, the value of R (in Ω) is

A car travelling at 60 km/h overtake another car travelling at 42 km/h. Assuming each car to be 5m long, find the time taken during the overtake and the total road distance used for the overtake.

Eight identical resistances r are connected as shown in figure. Find equivalent resistance between A and D.

At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image of 24 cm from it on the other side what will be the magnification produced in this case and image distance is ____________

16.How to apply gauss theorem in infinitely long linear charge distribution

It is advised to keep the magnets away from television, mobiles, CD and computers. Explain why?

Colour code of a carbon resistor is given as below.The value of resistance and tolerance respectively, are

Let →a=α^i+2^j−3^k,→b=^i+2α^j−2^k and →c=2^i−α^j+^k and {(→a×→b)×(→b×→c)}×(→c×→a)=→0, then the value of 6α is

A cylindrical tube, open at both ends, has a fundamental frequency f0, in air. The tube is dipped vertically into water such that half of its length is inside water. The fundamental frequency of the air column now is

Representing stopping potential V along y-axis and 1/λ along x-axis for a given photocathode of work function ω_{°. }The curve is a straight line , the intercept on x-axis is equal to 1) ω_°/hc 2)hc/ω_° 3)ω_° c/h 4)

A regular n sided polygon is made from a uniform wire of resistance R. Given n is even, find the resistance of the polygon between any two adjacent corners.

If U1, U2 represents "change in potential energy" of a body with mass m moving from A to B along two different paths 1, &amp; 2 (as shown in the figure) in the gravitational field. Then

(a) Three resistors 2 W, 4 W and 5 W are combined in parallel. Whatis the total resistance of the combination? (b) If the combination is connected to a battery of emf 20 V andnegligible internal resistance, determine the current througheach resistor, and the total current drawn from the battery.

33/ A block is projected with speed 20 m/s on a roughhorizontal surface. The coefficient of friction (u)between the surfaces varies with time () as showin figure. The speed of body at the end of 4 secondwill be (g = 10 m/s2)0.50.3ts)2(1) 2 m/s(2) 5 m/s(3) 7.2 m/s(4) 9.5 m/s

A toy rocket of mass 0.1kg has fuel of mass 0.02kg which burns out in 3sec. Starting from rest on a horizontal smooth track, it gets a speed of 20 m/s when fuel is burned out. What is the approximate thrust of the rocket? What is the energy content per unit mass of fuel?

Cos3/13= -cos10/13

how to find the moment of inertia of a semi circular ring about an axis perpendicular to the plane,at centre. and also about diameter

If at t=0 ,a travelling wave pulse on a string is described by the function y=6÷(x^2 + 3). what will be the wave function representing the pulse at time t, if the pulse is propagating along positive x axis with speed 4m/s. pleas explain how to solv

Differentiate between rod and cone cells.

Electric potential is given by V=6x−8xy2−8y+6yz−4z2 then electric force acting on 2 C charge placed at origin will be

What is the relationship between efficiency of brayton η cycle and COP of Bell-coleman cycle?

In a graph between kinetic energy and momentum why is the line curved in case of P and not in case of P^{2 }?

If the linear momentum of a body is conserved, will it's angular momentum be conserved and vice versa ?

A silicon specimen is made into a P−type semiconductor by doping, on an average, one Indium atom per 5×107silicon atoms. If the number density of atoms in the silicon specimen is 5×1028 per m3. Then the number of acceptor atoms in silicon per cubic centimetre will be,

A man walking on a horizontal road with a speed of 4 km/h finds rain drop fall vertically. when he reduce his speed 3km/r rain drops hit him 30 degree with vertical. the magnitude of rain with respect to ground.

Corresponding to given v-s graph of a particle moving in a straight line, Which of the following is the correct a-s graph(s is displacement, v is velocity and a is acceleration ).

From the graph between current i &amp; voltage V shown, identify the portion corresponding to negative resistance

78 How to find formal charge?

A uniform circular disc of mass 200 g and radius 4.0 cm is rotated about one of its diameter at an angular speed of 20 rad/s. Find its angular momentum ( in kg-m/s) about the axis of rotation.

A body of mass M collides against a wall with a velocity v and retrates its path with the same speed. The change in momentum is??

As shown in figure the tension in the horizontal cord is 20 N. The weight W and tension in the string OA in Newton are

In a YDSE experiment if a slab whose refractive index can be varied is placed in front of one of the slits then the variation of resultant intensity at mid-point of screen with ′μ′ will be best represented by μ≥1. [Assume slits of equal width and there is no absorption by slab]

If U1, U2 represents "change in potential energy" of a body with mass m moving from A to B along two different paths 1, & 2 (as shown in the figure) in the gravitational field. Then

From the graph between current i & voltage V shown, identify the portion corresponding to negative resistance