13232 + Interview Questions in Physics Page 85 InterviewSolution

4201.	निम्नलिखित के आशय स्पष्ट कीजिए -उनके गीत भाव-प्रवण थे − दुरूह नहीं।
Answer» निम्नलिखित के आशय स्पष्ट कीजिए - उनके गीत भाव-प्रवण थे − दुरूह नहीं।

4201.

निम्नलिखित के आशय स्पष्ट कीजिए -उनके गीत भाव-प्रवण थे − दुरूह नहीं।

Answer»

निम्नलिखित के आशय स्पष्ट कीजिए -

उनके गीत भाव-प्रवण थे − दुरूह नहीं।

4202.	12.A planet is of mass m moving around the sun of mass M in an eliptical orbit . Calculate the kinetic energy of the planet when it is at a distance a/2 from the sun
Answer» 12.A planet is of mass m moving around the sun of mass M in an eliptical orbit . Calculate the kinetic energy of the planet when it is at a distance a/2 from the sun

Discussion

4203.	a ball of mass 2 kgis projected with 10 ms^{-1^{}} from tge top of a tower of height 20 m The kinetic energy of the ball at ground is \lbrack g=10 ms^{-2}\rbrack
Answer» a ball of mass 2 kgis projected with 10 ms^{-1^{}} from tge top of a tower of height 20 m The kinetic energy of the ball at ground is \lbrack g=10 ms^{-2}\rbrack

Discussion

4204.	What are various effects of force ?
Answer» What are various effects of force ?

Discussion

4205.	Two spheres of masses m1 and m2 (m1>m2) respectively are tied to the ends of a light, inextensible string which passes over a light frictionless pulley. When the masses are released from their initial state of rest, the acceleration of their centre of mass is:
Answer» Two spheres of masses m1 and m2 (m1>m2) respectively are tied to the ends of a light, inextensible string which passes over a light frictionless pulley. When the masses are released from their initial state of rest, the acceleration of their centre of mass is:

4205.

Two spheres of masses m1 and m2 (m1>m2) respectively are tied to the ends of a light, inextensible string which passes over a light frictionless pulley. When the masses are released from their initial state of rest, the acceleration of their centre of mass is:

Answer»

Two spheres of masses m1 and m2 (m1>m2) respectively are tied to the ends of a light, inextensible string which passes over a light frictionless pulley. When the masses are released from their initial state of rest, the acceleration of their centre of mass is:

Discussion

4206.	An object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm. If the object is displaced through a distance of 20 cm towards the mirror, by how much distance the image is displaced?
Answer» An object is placed at a distance of $40 cm$ from a concave mirror of focal length $15 cm$ . If the object is displaced through a distance of $20 cm$ towards the mirror, by how much distance the image is displaced?

Discussion

4207.	A point object is kept 30cm away from a thin convex lens of focal length 20cm and convex mirror of R=30cm is also kept behind the lens of a dis†an ce of 30cm Ist image by convex lens and final imag
Answer» A point object is kept 30cm away from a thin convex lens of focal length 20cm and convex mirror of R=30cm is also kept behind the lens of a dis†an ce of 30cm Ist image by convex lens and final imag

Discussion

4208.	The sequential circuit shown in figure below:The repeated sequence generates by the above circuit is
Answer» The sequential circuit shown in figure below: The repeated sequence generates by the above circuit is

Discussion

4209.	The meniscus of mercury in the capillary tube is
Answer» The meniscus of mercury in the capillary tube is

Discussion

4210.	A particle is moving on a circular path of radius15R= _mwith constant speed 10 m/s. If it movesfrom point A to point B as shown in figure thenmagnitude of average acceleration of the particleduring its journey will be
Answer» A particle is moving on a circular path of radius15R= _mwith constant speed 10 m/s. If it movesfrom point A to point B as shown in figure thenmagnitude of average acceleration of the particleduring its journey will be

Discussion

4211.	When does an object sink or float in a liquid?
Answer» When does an object sink or float in a liquid?

Discussion

4212.	In the figure shown below, find the total resistance of the circuit.
Answer» In the figure shown below, find the total resistance of the circuit.

Discussion

4213.	The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of 1200 m s−1. Calculate the wavelength of the disturbance in mm.2.4
Answer» The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of $1200 {m s}^{- 1}$ . Calculate the wavelength of the disturbance in $mm$ . 2.4

4213.

The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of 1200 m s−1. Calculate the wavelength of the disturbance in mm.2.4

Answer» The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of

1200 {m s}^{- 1}

. Calculate the wavelength of the disturbance in

mm

.

2.4

Discussion

4214.	three equal masses 2m each are placed at the vertices an equilateral triangle pqR ,what is the force on mass m of the mass at the vertex P is quadruple
Answer» three equal masses 2m each are placed at the vertices an equilateral triangle pqR ,what is the force on mass m of the mass at the vertex P is quadruple

Discussion

4215.	10 application of first law of motion
Answer» 10 application of first law of motion

Discussion

4216.	A ball is shot vertically upward with a given initial velocity. It reaches a maximum height of 100 m. If in the second shot the initial velocity is doubled then the ball will reach a maximum height of
Answer» A ball is shot vertically upward with a given initial velocity. It reaches a maximum height of $100 m$ . If in the second shot the initial velocity is doubled then the ball will reach a maximum height of

Discussion

4217.	Is momentum conserved during SHM?
Answer» Is momentum conserved during SHM?

Discussion

4218.	Equivalent resistance between any two adjacent corners of the square, as shown in the figure, is[0.77 Mark]
Answer» Equivalent resistance between any two adjacent corners of the square, as shown in the figure, is $[$ 0.77 Mark $]$

Discussion

4219.	Can any object have momentum even if its mechanical energy is zero? Explain.
Answer» Can any object have momentum even if its mechanical energy is zero? Explain.

Discussion

4220.	two balls are thrown horizontally from a 80m high towerin same direction with velocities 2m/s and 3m/ s resp.the separation between tge two balls when they hit the ground is?
Answer» two balls are thrown horizontally from a 80m high towerin same direction with velocities 2m/s and 3m/ s resp.the separation between tge two balls when they hit the ground is?

Discussion

4221.	The linear momentum of a perticle given by P=a+bt2,where t is time a and b are constant vectors.The mag of force acting on particle varies with time t as
Answer» The linear momentum of a perticle given by P=a+bt2,where t is time a and b are constant vectors.The mag of force acting on particle varies with time t as

Discussion

4222.	Explain why an iron nail floats on mercury, but it sinks in water.
Answer» Explain why an iron nail floats on mercury, but it sinks in water.

Discussion

4223.	The picture shows a bucket being whirled around in a circle (neglect gravity). Think about the correlation between this action and the motion of the moon around the earth. Then pick out the incorrect statement.
Answer» The picture shows a bucket being whirled around in a circle (neglect gravity). Think about the correlation between this action and the motion of the moon around the earth. Then pick out the incorrect statement.

Discussion

4224.	Two friends Tinku and Chintu are on the balcony of a building at 7th floor and 9th floor, which is at a distance of 60 m and 80 m from the ground respectively. Tinku throws a ball upwards at a velocity such that it just reaches Chintu. Chintu then drops the ball to the ground. Calculate the total time taken in seconds. (Take a = 10 m/s2)
Answer» Two friends Tinku and Chintu are on the balcony of a building at $7^{t h}$ floor and $9^{t h}$ floor, which is at a distance of 60 m and 80 m from the ground respectively. Tinku throws a ball upwards at a velocity such that it just reaches Chintu. Chintu then drops the ball to the ground. Calculate the total time taken in seconds. (Take a = 10 $m / s^{2}$ )

Discussion

4225.	(a) Define pressure. (b) What is the relation between pressure, force and area ? (c) Calculate the pressure when a force of 200 N is exerted on an area of : (i) 10m2 (ii) 5m2
Answer» (a) Define pressure. (b) What is the relation between pressure, force and area ? (c) Calculate the pressure when a force of 200 N is exerted on an area of : (i) $10 m^{2}$ (ii) $5 m^{2}$

4225.

(a) Define pressure. (b) What is the relation between pressure, force and area ? (c) Calculate the pressure when a force of 200 N is exerted on an area of : (i) 10m2 (ii) 5m2

Answer»

(a) Define pressure.
(b) What is the relation between pressure, force and area ?
(c) Calculate the pressure when a force of 200 N is exerted on an area of :

(i) $10 m^{2}$
(ii) $5 m^{2}$

Discussion

4226.	If mass of earth decreases by 20%and its radius increases by 20%,then acceleration due to gravity at the surface of earth will become how much time?
Answer» If mass of earth decreases by 20%and its radius increases by 20%,then acceleration due to gravity at the surface of earth will become how much time?

Discussion

4227.	Assuming that the mass of the largest stone that can be moved by a flowing river depends upon the velocity of the water,its density and the acceleration due to gravity. Then,mass is directly proportional to
Answer» Assuming that the mass of the largest stone that can be moved by a flowing river depends upon the velocity of the water,its density and the acceleration due to gravity. Then,mass is directly proportional to

Discussion

4228.	The time periods of revolution of Earth and Jupiter are in the ratio 1:12. Then the radii of Jupiter and Earth are in the ratio .
Answer» The time periods of revolution of Earth and Jupiter are in the ratio 1:12. Then the radii of Jupiter and Earth are in the ratio .

Discussion

4229.	Pressure P1 is applied on a sphere of radius 5 cm. Keeping the thrust constant, if the radius of the sphere is decreased to 2.5 cm, the new pressure is found out to be P2. Find P2:P1.4
Answer» Pressure $P_{1}$ is applied on a sphere of radius $5 cm$ . Keeping the thrust constant, if the radius of the sphere is decreased to $2.5 cm$ , the new pressure is found out to be $P_{2}$ . Find $P_{2} : P_{1}$ . 4

Discussion

4230.	Fid 2.36 shows the displacement-time graph for four bodies A,B,C and D.In each case state what information do you get about the acceleration (zero, positive or negative).
Answer» Fid 2.36 shows the displacement-time graph for four bodies A,B,C and D.In each case state what information do you get about the acceleration (zero, positive or negative).

4230.

Fid 2.36 shows the displacement-time graph for four bodies A,B,C and D.In each case state what information do you get about the acceleration (zero, positive or negative).

Answer»

Fid 2.36 shows the displacement-time graph for four bodies A,B,C and D.In each case state what information do you get about the acceleration (zero, positive or negative).

Discussion

4231.	Define shape of our galaxy in universe and how our universe works ?
Answer» Define shape of our galaxy in universe and how our universe works ?

Discussion

4232.	A vessel of base area 100cm * 60 cm and height 200 cm is completely filled with a liquid of density 1.1×103kg/m3. Find the thrust a the bottom of the vessel ignoring the atmospheric pressure.
Answer» A vessel of base area 100cm * 60 cm and height 200 cm is completely filled with a liquid of density $1.1 \times 10^{3} k g / m^{3}$ . Find the thrust a the bottom of the vessel ignoring the atmospheric pressure.

Discussion

4233.	The following observations were noted while performing an experiment. Find the relative density of the salt solution with the help of the observation noted. (I) Weight of the stone in the air = 272 (II) Weight of the stone in the water = 192 g (III) Weight of the stone in the salt solution = 176 g
Answer» The following observations were noted while performing an experiment. Find the relative density of the salt solution with the help of the observation noted. (I) Weight of the stone in the air = 272 (II) Weight of the stone in the water = 192 g (III) Weight of the stone in the salt solution = 176 g

Discussion

4234.	62.An electrostatic field line leaves at angle alpha(a) from point charge q1 and connects with point charge -q2 at angle bita(b).find relationship between alpha and bita.
Answer» 62.An electrostatic field line leaves at angle alpha(a) from point charge q1 and connects with point charge -q2 at angle bita(b).find relationship between alpha and bita.

Discussion

4235.	Which of the following physical quantities remains unchanged when a sound wave enters from one medium to another?
Answer» Which of the following physical quantities remains unchanged when a sound wave enters from one medium to another?

Discussion

4236.	Question 20 The weight of any person on the moon is about 16 times that on the earth. He can lift a mass of 15 kg on the earth. What will be the maximum mass, which can be lifted by the same force applied by the person on the moon?
Answer» Question 20 The weight of any person on the moon is about $\frac{1}{6}$ times that on the earth. He can lift a mass of 15 kg on the earth. What will be the maximum mass, which can be lifted by the same force applied by the person on the moon?

Discussion

4237.	A quantity has a value of -16 m/s2. It is be the:
Answer» A quantity has a value of -16 m/s². It is be the:

Discussion

4238.	A call center handles(a) Only in-bound voice based business(b) Only out-based voice based business.(c) Both voice based and non-voice based business.(d) Both customer facing and back-end business.
Answer» A call center handles (a) Only in-bound voice based business (b) Only out-based voice based business. (c) Both voice based and non-voice based business. (d) Both customer facing and back-end business.

4238.

A call center handles(a) Only in-bound voice based business(b) Only out-based voice based business.(c) Both voice based and non-voice based business.(d) Both customer facing and back-end business.

Answer»

A call center handles

(a) Only in-bound voice based business

(b) Only out-based voice based business.

(c) Both voice based and non-voice based business.

(d) Both customer facing and back-end business.

Discussion

4239.	35.If intensity of sound increases to 400% of its initial value, then percentage increase in its amplitude will be ?
Answer» 35.If intensity of sound increases to 400% of its initial value, then percentage increase in its amplitude will be ?

Discussion

4240.	A particle is moving such that its position coordinates x and y are 2m, 3m at time t=0 6m, 7m at time t=2s and 13m,14m at time t=5s. Average velocity vector from t=0 to t=5s is :
Answer» A particle is moving such that its position coordinates x and y are 2m, 3m at time t=0 6m, 7m at time t=2s and 13m,14m at time t=5s. Average velocity vector from t=0 to t=5s is :

Discussion

4241.	Which dam should be stronger, one that must hold back 100,000 m3 of 10 m deep water or one that must hold back 1000 m3 of 20 m deep water? Give reasons.
Answer» Which dam should be stronger, one that must hold back 100,000 $m^{3}$ of 10 m deep water or one that must hold back 1000 $m^{3}$ of 20 m deep water? Give reasons.

Discussion

4242.	Height at which the value of g becomes 116th of that of the earth is
Answer» Height at which the value of g becomes $\frac{1}{16} t h$ of that of the earth is

Discussion

4243.	40. tunnel is made across the earth at distance R/2 from the center of earth.A particle is dropped (from rest) in the tunnel at one end. If v1 is the speed of particle when passing through the center of tunnel and v2 is the orbital speed of an earth satellite(very close to earthg surface). If v1/v2 = root x +1 / x. Find x.
Answer» 40. tunnel is made across the earth at distance R/2 from the center of earth.A particle is dropped (from rest) in the tunnel at one end. If v1 is the speed of particle when passing through the center of tunnel and v2 is the orbital speed of an earth satellite(very close to earthg surface). If v1/v2 = root x +1 / x. Find x.

Discussion

4244.	The compressibility of water is 4x10^-5 per unit atm pressure. The decrease in volume of 100 cm³ of water under a pressure of 10 atm will be??
Answer» The compressibility of water is 4x10^-5 per unit atm pressure. The decrease in volume of 100 cm³ of water under a pressure of 10 atm will be??

Discussion

4245.	A narrow monochromatic beam of light of intensity I is incident on a glass plate as shown in the figure. Another identical glass plate is kept close to the first one and parallel to it. Each glass plate reflects 25% of the light incident on it and transmits the remaining. The ratio of minimum and maximum intensities of the resultant beam obtained after one reflection at each plate is
Answer» A narrow monochromatic beam of light of intensity $I$ is incident on a glass plate as shown in the figure. Another identical glass plate is kept close to the first one and parallel to it. Each glass plate reflects $25$ % of the light incident on it and transmits the remaining. The ratio of minimum and maximum intensities of the resultant beam obtained after one reflection at each plate is

Discussion

4246.	Which of these are examples of direct proportions ? (i) Cost price to grocery. (ii) Time required in completing a work to the number of workers doing that work. (iii) Distance covered to time when speed is constant.
Answer» Which of these are examples of direct proportions ? (i) Cost price to grocery. (ii) Time required in completing a work to the number of workers doing that work. (iii) Distance covered to time when speed is constant.

Discussion

4247.	Two simple pendulums A and B have equal length, but their bobs weigh 50 g and 100 g respectively. What would be the ratio of their time periods?
Answer» Two simple pendulums A and B have equal length, but their bobs weigh 50 g and 100 g respectively. What would be the ratio of their time periods?

Discussion

4248.	Which of the following organisms return the nutrients to the soil?
Answer» Which of the following organisms return the nutrients to the soil?

4248.

Which of the following organisms return the nutrients to the soil?

Answer»

Which of the following organisms return the nutrients to the soil?

Discussion

4249.	diamensional formula of quantity E is electric field and B is magnetic field will b
Answer» diamensional formula of quantity E is electric field and B is magnetic field will b

Discussion

4250.	1.A stone falls from a building and reaches the ground in 2.5 seconds latter . How high is the building? 2. A stone dropped from a height of 20meter i) How long it will take to reach the ground. ii)what will be it's speed when it hits the ground.
Answer» 1.A stone falls from a building and reaches the ground in 2.5 seconds latter . How high is the building? 2. A stone dropped from a height of 20meter i) How long it will take to reach the ground. ii)what will be it's speed when it hits the ground.

4250.

1.A stone falls from a building and reaches the ground in 2.5 seconds latter . How high is the building? 2. A stone dropped from a height of 20meter i) How long it will take to reach the ground. ii)what will be it's speed when it hits the ground.

Answer»

1.A stone falls from a building and reaches the ground in 2.5 seconds latter . How high is the building?

2. A stone dropped from a height of 20meter

i) How long it will take to reach the ground.

ii)what will be it's speed when it hits the ground.

Discussion

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निम्नलिखित के आशय स्पष्ट कीजिए -उनके गीत भाव-प्रवण थे − दुरूह नहीं।

12.A planet is of mass m moving around the sun of mass M in an eliptical orbit . Calculate the kinetic energy of the planet when it is at a distance a/2 from the sun

a ball of mass 2 kgis projected with 10 ms^{-1^{}} from tge top of a tower of height 20 m The kinetic energy of the ball at ground is \lbrack g=10 ms^{-2}\rbrack

What are various effects of force ?

Two spheres of masses m1 and m2 (m1&gt;m2) respectively are tied to the ends of a light, inextensible string which passes over a light frictionless pulley. When the masses are released from their initial state of rest, the acceleration of their centre of mass is:

An object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm. If the object is displaced through a distance of 20 cm towards the mirror, by how much distance the image is displaced?

A point object is kept 30cm away from a thin convex lens of focal length 20cm and convex mirror of R=30cm is also kept behind the lens of a dis†an ce of 30cm Ist image by convex lens and final imag

The sequential circuit shown in figure below:The repeated sequence generates by the above circuit is

The meniscus of mercury in the capillary tube is

A particle is moving on a circular path of radius15R= _mwith constant speed 10 m/s. If it movesfrom point A to point B as shown in figure thenmagnitude of average acceleration of the particleduring its journey will be

When does an object sink or float in a liquid?

In the figure shown below, find the total resistance of the circuit.

The given graph shows the displacement versus time relation for a disturbance travelling with a velocity of 1200 m s−1. Calculate the wavelength of the disturbance in mm.2.4

three equal masses 2m each are placed at the vertices an equilateral triangle pqR ,what is the force on mass m of the mass at the vertex P is quadruple

10 application of first law of motion

A ball is shot vertically upward with a given initial velocity. It reaches a maximum height of 100 m. If in the second shot the initial velocity is doubled then the ball will reach a maximum height of

Is momentum conserved during SHM?

Equivalent resistance between any two adjacent corners of the square, as shown in the figure, is[0.77 Mark]

Can any object have momentum even if its mechanical energy is zero? Explain.

two balls are thrown horizontally from a 80m high towerin same direction with velocities 2m/s and 3m/ s resp.the separation between tge two balls when they hit the ground is?

The linear momentum of a perticle given by P=a+bt2,where t is time a and b are constant vectors.The mag of force acting on particle varies with time t as

Explain why an iron nail floats on mercury, but it sinks in water.

The picture shows a bucket being whirled around in a circle (neglect gravity). Think about the correlation between this action and the motion of the moon around the earth. Then pick out the incorrect statement.

(a) Define pressure. (b) What is the relation between pressure, force and area ? (c) Calculate the pressure when a force of 200 N is exerted on an area of : (i) 10m2 (ii) 5m2

If mass of earth decreases by 20%and its radius increases by 20%,then acceleration due to gravity at the surface of earth will become how much time?

Assuming that the mass of the largest stone that can be moved by a flowing river depends upon the velocity of the water,its density and the acceleration due to gravity. Then,mass is directly proportional to

The time periods of revolution of Earth and Jupiter are in the ratio 1:12. Then the radii of Jupiter and Earth are in the ratio .

Pressure P1 is applied on a sphere of radius 5 cm. Keeping the thrust constant, if the radius of the sphere is decreased to 2.5 cm, the new pressure is found out to be P2. Find P2:P1.4

Fid 2.36 shows the displacement-time graph for four bodies A,B,C and D.In each case state what information do you get about the acceleration (zero, positive or negative).

Define shape of our galaxy in universe and how our universe works ?

A vessel of base area 100cm * 60 cm and height 200 cm is completely filled with a liquid of density 1.1×103kg/m3. Find the thrust a the bottom of the vessel ignoring the atmospheric pressure.

The following observations were noted while performing an experiment. Find the relative density of the salt solution with the help of the observation noted. (I) Weight of the stone in the air = 272 (II) Weight of the stone in the water = 192 g (III) Weight of the stone in the salt solution = 176 g

62.An electrostatic field line leaves at angle alpha(a) from point charge q1 and connects with point charge -q2 at angle bita(b).find relationship between alpha and bita.

Which of the following physical quantities remains unchanged when a sound wave enters from one medium to another?

Question 20 The weight of any person on the moon is about 16 times that on the earth. He can lift a mass of 15 kg on the earth. What will be the maximum mass, which can be lifted by the same force applied by the person on the moon?

A quantity has a value of -16 m/s2. It is be the:

A call center handles(a) Only in-bound voice based business(b) Only out-based voice based business.(c) Both voice based and non-voice based business.(d) Both customer facing and back-end business.

35.If intensity of sound increases to 400% of its initial value, then percentage increase in its amplitude will be ?

A particle is moving such that its position coordinates x and y are 2m, 3m at time t=0 6m, 7m at time t=2s and 13m,14m at time t=5s. Average velocity vector from t=0 to t=5s is :

Which dam should be stronger, one that must hold back 100,000 m3 of 10 m deep water or one that must hold back 1000 m3 of 20 m deep water? Give reasons.

Height at which the value of g becomes 116th of that of the earth is

The compressibility of water is 4x10^-5 per unit atm pressure. The decrease in volume of 100 cm³ of water under a pressure of 10 atm will be??

Which of these are examples of direct proportions ? (i) Cost price to grocery. (ii) Time required in completing a work to the number of workers doing that work. (iii) Distance covered to time when speed is constant.

Two simple pendulums A and B have equal length, but their bobs weigh 50 g and 100 g respectively. What would be the ratio of their time periods?

Which of the following organisms return the nutrients to the soil?

diamensional formula of quantity E is electric field and B is magnetic field will b

1.A stone falls from a building and reaches the ground in 2.5 seconds latter . How high is the building? 2. A stone dropped from a height of 20meter i) How long it will take to reach the ground. ii)what will be it's speed when it hits the ground.

Two spheres of masses m1 and m2 (m1>m2) respectively are tied to the ends of a light, inextensible string which passes over a light frictionless pulley. When the masses are released from their initial state of rest, the acceleration of their centre of mass is: