50278 + Interview Questions in Physics

1.	8. Chromium metal crystallises with a BCC lattice edge length is 287pm. Calculate the density of chromium in gm/cm . ( gram atomic weight of chromium is 52.2)
Answer» 8. Chromium metal crystallises with a BCC lattice edge length is 287pm. Calculate the density of chromium in gm/cm . ( gram atomic weight of chromium is 52.2)

Discussion

2.	T K ,Pcl5 is 50% dissociated at an equilibrium pressure of 4 atm.what pressure it would be dissociate to the extent of 80% at same temperature
Answer» T K ,Pcl5 is 50% dissociated at an equilibrium pressure of 4 atm.what pressure it would be dissociate to the extent of 80% at same temperature

Discussion

3.	Minimum number of 8μF and 250V capacitors used to make a combination of 16μF and 1000V are:
Answer» Minimum number of $8 μ F$ and $250 V$ capacitors used to make a combination of $16 μ F$ and $1000 V$ are:

Discussion

4.	A series RLC circuit has inductance of 0.12 H, capacitance of 480 nF and resistance of 23 Ω is connected to a 230 V AC supply whose frequency can be varied. What is the source frequency for which average power absorbed by the circuit is maximum? Also, find the value of maximum power.
Answer» A series $R L C$ circuit has inductance of $0.12 H$ , capacitance of $480 nF$ and resistance of $23 Ω$ is connected to a $230 V$ AC supply whose frequency can be varied. What is the source frequency for which average power absorbed by the circuit is maximum? Also, find the value of maximum power.

Discussion

5.	A car starts accelerating with an acceleration of 13 m/s2 when its speed was 18 km/h. If the displacement of car in nth minute after it starts accelerating is 4.8 km, then n is:
Answer» A car starts accelerating with an acceleration of $\frac{1}{3} {m/s}^{2}$ when its speed was $18 km/h$ . If the displacement of car in $n^{t h}$ minute after it starts accelerating is $4.8 km,$ then $n$ is:

Discussion

6.	Two light waves having the same wavelength λ in vacuum are in phase initially. Then the first wave travels a path L1 through a medium of refractive index n1 while the second wave travels a path of length L2 through a medium of refractive index n2. After this, the phase difference between the two waves is:
Answer» Two light waves having the same wavelength $λ$ in vacuum are in phase initially. Then the first wave travels a path $L_{1}$ through a medium of refractive index $n_{1}$ while the second wave travels a path of length $L_{2}$ through a medium of refractive index $n_{2}$ . After this, the phase difference between the two waves is:

Discussion

7.	A bat is emitting the ultrasonic sound of frequency 100 kHz in air. What will be the wavelength of sound heard by a person inside a lake over which bat is flying? [speed of sound in air =340 ms−1 and speed of sound in water =1500 ms−1]
Answer» A bat is emitting the ultrasonic sound of frequency $100 kHz$ in air. What will be the wavelength of sound heard by a person inside a lake over which bat is flying? [speed of sound in air $= 340 {ms}^{- 1}$ and speed of sound in water $= 1500 {ms}^{- 1}$ ]

Discussion

8.	Wave pulse on a string shown in figure is moving to the right without changing shape. Consider two particles at positions x1=1.5 m and x2=2.5 m. Their transverse velocities at the moment shown in figure are along directions.
Answer» Wave pulse on a string shown in figure is moving to the right without changing shape. Consider two particles at positions $x_{1} = 1.5 m a n d x_{2} = 2.5 m$ . Their transverse velocities at the moment shown in figure are along directions.

Discussion

9.	Two coils A and B having turns 300 and 600 respectively are placed near each other, on passing a current of 3.0 ampere in A, the flux linked with A is 1.2 x 10 −4 weber and with B it is 9.0 x 10 −5 weber. The mutual induction of the system is:
Answer» Two coils A and B having turns 300 and 600 respectively are placed near each other, on passing a current of 3.0 ampere in A, the flux linked with A is 1.2 x 10 −4 weber and with B it is 9.0 x 10 −5 weber. The mutual induction of the system is:

Discussion

10.	The difference between the apparent frequencies of a source of sound perceived by a stationary observer during its approach and recession is 2% of the actual frequency of the source. If the speed of sound is 300 m/s, the speed of the source is
Answer» The difference between the apparent frequencies of a source of sound perceived by a stationary observer during its approach and recession is $2 %$ of the actual frequency of the source. If the speed of sound is $300 m/s$ , the speed of the source is

Discussion

11.	A current I flows through a uniform wire of diameter d when the mean electron drift velocity is v. The same current will flow through a wire of diameter d/2 made of the same material if the mean drift velocity of the electron is
Answer» A current $I$ flows through a uniform wire of diameter $d$ when the mean electron drift velocity is $v$ . The same current will flow through a wire of diameter $d / 2$ made of the same material if the mean drift velocity of the electron is

Discussion

12.	39. The moment of inertia of the three rods each of mass 'm' and length 'l' making an equilateral triangle. The moment of inertia of side AB is
Answer» 39. The moment of inertia of the three rods each of mass 'm' and length 'l' making an equilateral triangle. The moment of inertia of side AB is

Discussion

13.	Two vessels A and B of different shapes have the same base area and are filled with water upto the same height h (as shown). The force exerted by water on the base is FA for vessel A and FB for vessel B. The respective weights of water in the vessels are WA and WB. Then
Answer» Two vessels $A$ and $B$ of different shapes have the same base area and are filled with water upto the same height $h$ (as shown). The force exerted by water on the base is $F_{A}$ for vessel $A$ and $F_{B}$ for vessel $B$ . The respective weights of water in the vessels are $W_{A}$ and $W_{B}$ . Then

Discussion

14.	A particle executes SHM with an amplitude 4cm. At the mean position , the velocity of particle is 10cm/sec. the distance of particle from mean position when speed becomes 5cm/sec. is ?
Answer» A particle executes SHM with an amplitude 4cm. At the mean position , the velocity of particle is 10cm/sec. the distance of particle from mean position when speed becomes 5cm/sec. is ?

Discussion

15.	In the figure shown, all the blocks are of equal mass of 10 kg and F=300 N. Find the tension in the string TAB. Assume all surface to be smooth and g=10 m/s2.
Answer» In the figure shown, all the blocks are of equal mass of $10 kg$ and $F = 300 N$ . Find the tension in the string $T_{A B}$ . Assume all surface to be smooth and $g = 10 {m/s}^{2}$ .

Discussion

16.	Two particles A and B travells along the X-y axis with respective constant velocity V1= i m/s and V2= 2j m/s at time t=0. there at position (-2.0)m and (0,1)m respectively. the position vector of particle B with respect to A at 3 sec will be
Answer» Two particles A and B travells along the X-y axis with respective constant velocity V1= i m/s and V2= 2j m/s at time t=0. there at position (-2.0)m and (0,1)m respectively. the position vector of particle B with respect to A at 3 sec will be

Discussion

17.	A ball is dropped from height h on an inclined plane of angle of inclination alpha.Find where it should strike on the second time on the plane. The coefficient of restitution is e.
Answer» A ball is dropped from height h on an inclined plane of angle of inclination alpha.Find where it should strike on the second time on the plane. The coefficient of restitution is e.

Discussion

18.	One end of a massless spring of spring constant 100 N/m is fixed at the centre of a frictionless horizontal table and the other end is connected to a body of mass 7 kg lying on the table at rest. The spring has a natural length of 2 m. If the spring remains horizontal and mass is made to rotate at an angular speed of 1 rad/s, then find the elongation in the spring, assuming the elongation to be small compared to the natural length of the spring.
Answer» One end of a massless spring of spring constant $100 N / m$ is fixed at the centre of a frictionless horizontal table and the other end is connected to a body of mass $7 k g$ lying on the table at rest. The spring has a natural length of $2 m$ . If the spring remains horizontal and mass is made to rotate at an angular speed of $1 r a d / s$ , then find the elongation in the spring, assuming the elongation to be small compared to the natural length of the spring.

Discussion

19.	Choke coil works on the principle of
Answer» Choke coil works on the principle of

Discussion

20.	List down the steps before electricity reaches our home.
Answer» List down the steps before electricity reaches our home.

Discussion

21.	The initial pressure of COC2 is 1000 torr. The totapressure of the system becomes 1500 torr, when rthe equilibrium COC2(g) CO(g)+C(g) is attained at constant temperature. The value of Kp of a reaction(1) 1500(3) 2500(2) 1000(4500
Answer» The initial pressure of COC2 is 1000 torr. The totapressure of the system becomes 1500 torr, when rthe equilibrium COC2(g) CO(g)+C(g) is attained at constant temperature. The value of Kp of a reaction(1) 1500(3) 2500(2) 1000(4500

Discussion

22.	A glass of refractive index 1.5 is coated with a thin layer of thickness of t of refractive index 1.5 light of wavelength λ travelling in air is incident normally on the layer. It is partly reflected at the upper and the lower surfaces of the layer and the two reflected rays interfere. If λ=648 nm obtain the least value of t (in 10−8) for which the rays interfere consructively.
Answer» A glass of refractive index $1.5$ is coated with a thin layer of thickness of $t$ of refractive index $1.5$ light of wavelength $λ$ travelling in air is incident normally on the layer. It is partly reflected at the upper and the lower surfaces of the layer and the two reflected rays interfere. If $λ = 648 nm$ obtain the least value of $t$ (in $10^{- 8}$ ) for which the rays interfere consructively.

Discussion

23.	If the energy of a photon corresponding to a wavelength of 6000∘A is 3.32×10−19J, the photon energy for a wavelength of 4000∘A will be
Answer» If the energy of a photon corresponding to a wavelength of $6000 \circ A i s 3.32 \times 10^{- 19} J$ , the photon energy for a wavelength of $4000 \circ A$ will be

Discussion

24.	A particle is located at (3 m,4 m) and moving with →v=(4^i−3^j) m/s. Find the magnitude of angular velocity about origin at this instant.
Answer» A particle is located at $(3 m, 4 m)$ and moving with $\to v = (4^i - 3^j) m/s$ . Find the magnitude of angular velocity about origin at this instant.

Discussion

25.	In a soccer practice session the football is angle is kept at the centre of the field 40 yards from the 10 ft high goalposts. A goal is attempted by kicking the football at a speed of 64 ft/s at an angle of 452 to the horizontal. Will the ball reach the goal post ?
Answer» In a soccer practice session the football is angle is kept at the centre of the field 40 yards from the 10 ft high goalposts. A goal is attempted by kicking the football at a speed of 64 ft/s at an angle of $45^{2}$ to the horizontal. Will the ball reach the goal post ?

25.

In a soccer practice session the football is angle is kept at the centre of the field 40 yards from the 10 ft high goalposts. A goal is attempted by kicking the football at a speed of 64 ft/s at an angle of 452 to the horizontal. Will the ball reach the goal post ?

Answer»

In a soccer practice session the football is angle is kept at the centre of the field 40 yards from the 10 ft high goalposts. A goal is attempted by kicking the football at a speed of 64 ft/s at an angle of $45^{2}$ to the horizontal. Will the ball reach the goal post ?

Discussion

26.	If →a=i+2j+2k,\|→b\|=5 and the angle between →a and →b is π6, then the area of the triangle formed by these two vectors as two sides is
Answer» If $\to a = i + 2 j + 2 k, \| \to b \| = 5$ and the angle between $\to a$ and $\to b$ is $\frac{π}{6}$ , then the area of the triangle formed by these two vectors as two sides is

Discussion

27.	A block of mass m is connected to a massless pulley and massless spring of stiffnessk. The pulley is frictionless, and the string is massless. Initially, the block is not hanging, it is supported by some unknown support. Also, the spring is not stretched when the block is released. When the block is released, the spring is maximum stretched. Find the ratio of tension in the rope and weight of the block (give integer value)
Answer» A block of mass $m$ is connected to a massless pulley and massless spring of stiffness $k .$ The pulley is frictionless, and the string is massless. Initially, the block is not hanging, it is supported by some unknown support. Also, the spring is not stretched when the block is released. When the block is released, the spring is maximum stretched. Find the ratio of tension in the rope and weight of the block (give integer value)

Discussion

28.	A time domain system is LTI and has impulse response of h(t) given by h(t)=cosω0t+jsinω0t Thus impulse response is complex in nature if input to the system is x(t) = u(t+3) - u(t-3) then output is y(t), if y(0) = 6 then value of ω0 tends to _____. 0
Answer» A time domain system is LTI and has impulse response of h(t) given by $h (t) = cos ω_{0} t + j sin ω_{0} t$ Thus impulse response is complex in nature if input to the system is x(t) = u(t+3) - u(t-3) then output is y(t), if y(0) = 6 then value of $ω_{0}$ tends to _____. 0

Discussion

29.	Dimensional formula of displacement is ___
Answer» Dimensional formula of displacement is ___

Discussion

30.	In a cam design, the rise motion is given by a Simple Harmonic Motion (SHM) s=h2(1−cosπθβ) where h is total rise, θ is camshaft angle, β is the total angle of the rise interval. The jerk is given by
Answer» In a cam design, the rise motion is given by a Simple Harmonic Motion (SHM) $s = \frac{h}{2} (1 - c o s \frac{π θ}{β})$ where h is total rise, $θ$ is camshaft angle, $β$ is the total angle of the rise interval. The jerk is given by

Discussion

31.	A pure resistor & pure inductor is connected as shown in figure, now alternating voltage is connected across setup and reading of voltmeter is V1 & reading of ammeter is A1, now diamagnetic rod is placed in solenoid (inductor), now reading of voltmeter is V2 & reading of ammeter is A2, then
Answer» A pure resistor & pure inductor is connected as shown in figure, now alternating voltage is connected across setup and reading of voltmeter is $V_{1}$ & reading of ammeter is $A_{1}$ , now diamagnetic rod is placed in solenoid (inductor), now reading of voltmeter is $V_{2}$ & reading of ammeter is $A_{2}$ , then

Discussion

32.	a vector of magnitude13 makes an angle 65.37degree with the x axis.what is the component along positive y axis?
Answer» a vector of magnitude13 makes an angle 65.37degree with the x axis.what is the component along positive y axis?

Discussion

33.	Why is choke coil preferred over resistor to reduce a.c?
Answer» Why is choke coil preferred over resistor to reduce a.c?

Discussion

34.	An uniform electric field ' E ' exists between two parallel plates having opposite charges in each plates. an electron enters the field between the plates with speed v°. if the length of each plate is l then the angle with which electron deviates from its initial path
Answer» An uniform electric field ' E ' exists between two parallel plates having opposite charges in each plates. an electron enters the field between the plates with speed v°. if the length of each plate is l then the angle with which electron deviates from its initial path

Discussion

35.	A water jet is being used to fill a cylindrical container of diameter 1m and height 2 m. The jet shoots the water at an angle of 45o with velocity u above the same horizontal plane on which the container is kept. The distance between the jet and container is 6 m as shown in the diagram. For which of the following value(s) of u, the water will fill up the container. (Take g=10 m/s2)
Answer» A water jet is being used to fill a cylindrical container of diameter $1 m$ and height $2 m$ . The jet shoots the water at an angle of $45^{o}$ with velocity $u$ above the same horizontal plane on which the container is kept. The distance between the jet and container is $6 m$ as shown in the diagram. For which of the following value(s) of $u$ , the water will fill up the container. (Take $g = 10 m / s^{2})$

Discussion

36.	79.A steel plate of face area 4cm2 and thickness 0.5 cm is fixed rigidly at the lower surface.A tangetial force of 10N is applied on the upper surface.Find the lateral displacement of the upper surface with respect to the lower surface.Rigidity modulus of steel=8.4x10 to the power 10 N/m2.
Answer» 79.A steel plate of face area 4cm2 and thickness 0.5 cm is fixed rigidly at the lower surface.A tangetial force of 10N is applied on the upper surface.Find the lateral displacement of the upper surface with respect to the lower surface.Rigidity modulus of steel=8.4x10 to the power 10 N/m2.

Discussion

37.	13.Find the displacement of particle from t = 0 to t = 5 s from the graph shown
Answer» 13.Find the displacement of particle from t = 0 to t = 5 s from the graph shown

Discussion

38.	A man running on horizontal road finds the rain falling at angle α with the vertical. If he doubles his speed angle becomes β. With what angle with vertical whill rain appear to fall, when he triples his speed? The rain falls vertically down when he is at rest.
Answer» A man running on horizontal road finds the rain falling at angle $α$ with the vertical. If he doubles his speed angle becomes $β .$ With what angle with vertical whill rain appear to fall, when he triples his speed? The rain falls vertically down when he is at rest.

Discussion

39.	A solid cylinder of mass 3 kg is rolling on a horizontal surface with velocity 4 m/s. It collides with a horizontal spring of force constant 200 N/m. The maximum compression produced in the spring will be
Answer» A solid cylinder of mass $3 kg$ is rolling on a horizontal surface with velocity $4 m/s$ . It collides with a horizontal spring of force constant $200 N/m$ . The maximum compression produced in the spring will be

Discussion

40.	In a Young's double slit experiment two slits are separated by 2 mm and the screen is placed one meter away. When a light of wavelength 500 nm is used, the fringe separation will be:
Answer» In a Young's double slit experiment two slits are separated by $2 mm$ and the screen is placed one meter away. When a light of wavelength $500 nm$ is used, the fringe separation will be:

Discussion

41.	A reinforced concrete beam of rectangular section has a width of 300 mm and an effective depth of 500 mm. The effective cover to tension and compression steel is 40 mm each. The beam is reinforced with 4 bars of 20 mm diameter in tension and 2 bars of 16 mm diameter in compression. The grade of concrete used is M20 and steel is Fe145.The depth of neutral axis is ____ mm.[Assume fsc = 0.97 times allowable stress in tension steel]146.53
Answer» A reinforced concrete beam of rectangular section has a width of 300 mm and an effective depth of 500 mm. The effective cover to tension and compression steel is 40 mm each. The beam is reinforced with 4 bars of 20 mm diameter in tension and 2 bars of 16 mm diameter in compression. The grade of concrete used is M20 and steel is Fe145. The depth of neutral axis is ____ mm. [Assume $f_{s c}$ = 0.97 times allowable stress in tension steel] 146.53

Discussion

42.	If the series limit of Lymen series for Hydrogen atom is equal to the series limit of Balmer series for a hydrogen like atom, then atomic number of this hydrogen like atom will be
Answer» If the series limit of Lymen series for Hydrogen atom is equal to the series limit of Balmer series for a hydrogen like atom, then atomic number of this hydrogen like atom will be

Discussion

43.	The value of the integral ∫π/2−π/2(x2+lnπ+xπ−x)cosxdx is
Answer» The value of the integral $\int_{- π / 2}^{π / 2} (x^{2} + ln \frac{π + x}{π - x}) cos x d x$ is

Discussion

44.	An electric instrument consists of two units. Each unit must function independently for the instrument to operate. The probability that the first unit functions is 0.9 and that of the second unit is 0.8. The instrument is switched on and it fails to operate. If the probability that only the first unit failed and second unit is functioning is p, then 98p is equal to .
Answer» An electric instrument consists of two units. Each unit must function independently for the instrument to operate. The probability that the first unit functions is $0.9$ and that of the second unit is $0.8.$ The instrument is switched on and it fails to operate. If the probability that only the first unit failed and second unit is functioning is $p,$ then $98 p$ is equal to .

Discussion

45.	Does spring constant depend upon the dimensions of the spring. If yes, why?
Answer» Does spring constant depend upon the dimensions of the spring. If yes, why?

Discussion

46.	what is the formal charge and bond order of azide ion
Answer» what is the formal charge and bond order of azide ion

Discussion

47.	In a non uniform external field the dipole has a net force in the anti- parallel direction of increasing field when
Answer» In a non uniform external field the dipole has a net force in the anti- parallel direction of increasing field when

Discussion

48.	A column of timber section 10×20 cm is 5 meter long both ends being fixed. If the youngs modulus for timber is 18.0 kN/mm2. Then safe load for the column is____kN. (Take FOS = 3)158
Answer» A column of timber section $10 \times 20$ cm is 5 meter long both ends being fixed. If the youngs modulus for timber is $18.0 k N / m m^{2}$ . Then safe load for the column is____kN. (Take FOS = 3) 158

Discussion

49.	If velocity of a particle depends on time as v = t3+2√t. Then with what velocity is the particle moving at t = 4 sec and what is the displacement till then?
Answer» If velocity of a particle depends on time as v = $t^{3} + \frac{2}{\sqrt{t}}$ . Then with what velocity is the particle moving at t = 4 sec and what is the displacement till then?

Discussion

50.	120.The vector sum of two forces is perpendicular to their vector differences. In that case, the fores is
Answer» 120.The vector sum of two forces is perpendicular to their vector differences. In that case, the fores is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

8. Chromium metal crystallises with a BCC lattice edge length is 287pm. Calculate the density of chromium in gm/cm . ( gram atomic weight of chromium is 52.2)

T K ,Pcl5 is 50% dissociated at an equilibrium pressure of 4 atm.what pressure it would be dissociate to the extent of 80% at same temperature

Minimum number of 8μF and 250V capacitors used to make a combination of 16μF and 1000V are:

A series RLC circuit has inductance of 0.12 H, capacitance of 480 nF and resistance of 23 Ω is connected to a 230 V AC supply whose frequency can be varied. What is the source frequency for which average power absorbed by the circuit is maximum? Also, find the value of maximum power.

A car starts accelerating with an acceleration of 13 m/s2 when its speed was 18 km/h. If the displacement of car in nth minute after it starts accelerating is 4.8 km, then n is:

A bat is emitting the ultrasonic sound of frequency 100 kHz in air. What will be the wavelength of sound heard by a person inside a lake over which bat is flying? [speed of sound in air =340 ms−1 and speed of sound in water =1500 ms−1]

Wave pulse on a string shown in figure is moving to the right without changing shape. Consider two particles at positions x1=1.5 m and x2=2.5 m. Their transverse velocities at the moment shown in figure are along directions.

Two coils A and B having turns 300 and 600 respectively are placed near each other, on passing a current of 3.0 ampere in A, the flux linked with A is 1.2 x 10 −4 weber and with B it is 9.0 x 10 −5 weber. The mutual induction of the system is:

The difference between the apparent frequencies of a source of sound perceived by a stationary observer during its approach and recession is 2% of the actual frequency of the source. If the speed of sound is 300 m/s, the speed of the source is

A current I flows through a uniform wire of diameter d when the mean electron drift velocity is v. The same current will flow through a wire of diameter d/2 made of the same material if the mean drift velocity of the electron is

39. The moment of inertia of the three rods each of mass 'm' and length 'l' making an equilateral triangle. The moment of inertia of side AB is

Two vessels A and B of different shapes have the same base area and are filled with water upto the same height h (as shown). The force exerted by water on the base is FA for vessel A and FB for vessel B. The respective weights of water in the vessels are WA and WB. Then

A particle executes SHM with an amplitude 4cm. At the mean position , the velocity of particle is 10cm/sec. the distance of particle from mean position when speed becomes 5cm/sec. is ?

In the figure shown, all the blocks are of equal mass of 10 kg and F=300 N. Find the tension in the string TAB. Assume all surface to be smooth and g=10 m/s2.

Two particles A and B travells along the X-y axis with respective constant velocity V1= i m/s and V2= 2j m/s at time t=0. there at position (-2.0)m and (0,1)m respectively. the position vector of particle B with respect to A at 3 sec will be

A ball is dropped from height h on an inclined plane of angle of inclination alpha.Find where it should strike on the second time on the plane. The coefficient of restitution is e.

Choke coil works on the principle of

List down the steps before electricity reaches our home.

The initial pressure of COC2 is 1000 torr. The totapressure of the system becomes 1500 torr, when rthe equilibrium COC2(g) CO(g)+C(g) is attained at constant temperature. The value of Kp of a reaction(1) 1500(3) 2500(2) 1000(4500

If the energy of a photon corresponding to a wavelength of 6000∘A is 3.32×10−19J, the photon energy for a wavelength of 4000∘A will be

A particle is located at (3 m,4 m) and moving with →v=(4^i−3^j) m/s. Find the magnitude of angular velocity about origin at this instant.

In a soccer practice session the football is angle is kept at the centre of the field 40 yards from the 10 ft high goalposts. A goal is attempted by kicking the football at a speed of 64 ft/s at an angle of 452 to the horizontal. Will the ball reach the goal post ?

If →a=i+2j+2k,|→b|=5 and the angle between →a and →b is π6, then the area of the triangle formed by these two vectors as two sides is

A time domain system is LTI and has impulse response of h(t) given by h(t)=cosω0t+jsinω0t Thus impulse response is complex in nature if input to the system is x(t) = u(t+3) - u(t-3) then output is y(t), if y(0) = 6 then value of ω0 tends to _____. 0

Dimensional formula of displacement is ___

In a cam design, the rise motion is given by a Simple Harmonic Motion (SHM) s=h2(1−cosπθβ) where h is total rise, θ is camshaft angle, β is the total angle of the rise interval. The jerk is given by

a vector of magnitude13 makes an angle 65.37degree with the x axis.what is the component along positive y axis?

Why is choke coil preferred over resistor to reduce a.c?

An uniform electric field ' E ' exists between two parallel plates having opposite charges in each plates. an electron enters the field between the plates with speed v°. if the length of each plate is l then the angle with which electron deviates from its initial path

79.A steel plate of face area 4cm2 and thickness 0.5 cm is fixed rigidly at the lower surface.A tangetial force of 10N is applied on the upper surface.Find the lateral displacement of the upper surface with respect to the lower surface.Rigidity modulus of steel=8.4x10 to the power 10 N/m2.

13.Find the displacement of particle from t = 0 to t = 5 s from the graph shown

A man running on horizontal road finds the rain falling at angle α with the vertical. If he doubles his speed angle becomes β. With what angle with vertical whill rain appear to fall, when he triples his speed? The rain falls vertically down when he is at rest.

A solid cylinder of mass 3 kg is rolling on a horizontal surface with velocity 4 m/s. It collides with a horizontal spring of force constant 200 N/m. The maximum compression produced in the spring will be

In a Young's double slit experiment two slits are separated by 2 mm and the screen is placed one meter away. When a light of wavelength 500 nm is used, the fringe separation will be:

If the series limit of Lymen series for Hydrogen atom is equal to the series limit of Balmer series for a hydrogen like atom, then atomic number of this hydrogen like atom will be

The value of the integral ∫π/2−π/2(x2+lnπ+xπ−x)cosxdx is

Does spring constant depend upon the dimensions of the spring. If yes, why?

what is the formal charge and bond order of azide ion

In a non uniform external field the dipole has a net force in the anti- parallel direction of increasing field when

A column of timber section 10×20 cm is 5 meter long both ends being fixed. If the youngs modulus for timber is 18.0 kN/mm2. Then safe load for the column is____kN. (Take FOS = 3)158

If velocity of a particle depends on time as v = t3+2√t. Then with what velocity is the particle moving at t = 4 sec and what is the displacement till then?

120.The vector sum of two forces is perpendicular to their vector differences. In that case, the fores is