9478 + Interview Questions in Physics Page 6 InterviewSolution

251.	A block of mass 5 kg is at rest on a rough inclined surface. If angle of inclination of plane is 60^°, then force appliedby it on block is(1) 50 N(3) 25N(2) 25\sqrt3N(4) 50\sqrt3N
Answer» A block of mass 5 kg is at rest on a rough inclined surface. If angle of inclination of plane is 60^°, then force appliedby it on block is(1) 50 N(3) 25N(2) 25\sqrt3N(4) 50\sqrt3N

Discussion

252.	calculate the weight of gold having specific heat capacity 0.13 J per degree celcius per gram which is heated from 25 degree celcius to 300 degree celcius , where heat absorbed is 1500
Answer» calculate the weight of gold having specific heat capacity 0.13 J per degree celcius per gram which is heated from 25 degree celcius to 300 degree celcius , where heat absorbed is 1500

Discussion

253.	If the intensity of a sound is increased to 16 times, then by how many times will the amplitude change?
Answer» If the intensity of a sound is increased to 16 times, then by how many times will the amplitude change?

Discussion

254.	2 mol of a ideal gas at 27Celsius temperature expanded reversibly from 3l to 20 l .Find entropy change[R=2cal/mol K]
Answer» 2 mol of a ideal gas at 27Celsius temperature expanded reversibly from 3l to 20 l .Find entropy change[R=2cal/mol K]

Discussion

255.	The value of –25× –9 is ____________.
Answer» The value of $\sqrt{- 25} \times \sqrt{- 9}$ is ____________.

Discussion

256.	Question 14What happens to light when it gets dispersed? Give an example.
Answer» Question 14 What happens to light when it gets dispersed? Give an example.

256.

Question 14What happens to light when it gets dispersed? Give an example.

Answer»

Question 14

What happens to light when it gets dispersed? Give an example.

Discussion

257.	If angle between final and initial velocity is 90 ,then find change in velocity using vector concept.
Answer» If angle between final and initial velocity is 90 ,then find change in velocity using vector concept.

Discussion

258.	What does the following images signify?
Answer» What does the following images signify?

Discussion

259.	If the absolute temperature of the body is reduced to half the percentage decrease in the rate of loss of heat by radiation becomes nearly
Answer» If the absolute temperature of the body is reduced to half the percentage decrease in the rate of loss of heat by radiation becomes nearly

Discussion

260.	The bright star-like object with a long tail approaching the Sun in a highly elliptical orbit is called _______.
Answer» The bright star-like object with a long tail approaching the Sun in a highly elliptical orbit is called _______.

Discussion

261.	Four containers contain water at the same height as shown in the figure below. Rank them according to the pressure exerted at the bottom of the containers in ascending order.
Answer» Four containers contain water at the same height as shown in the figure below. Rank them according to the pressure exerted at the bottom of the containers in ascending order.

261.

Four containers contain water at the same height as shown in the figure below. Rank them according to the pressure exerted at the bottom of the containers in ascending order.

Answer»

Four containers contain water at the same height as shown in the figure below. Rank them according to the pressure exerted at the bottom of the containers in ascending order.

Discussion

262.	what will happen to the leaves of electroscope if a positively charged body is brought near
Answer» what will happen to the leaves of electroscope if a positively charged body is brought near

Discussion

263.	. The ratio ot radii of earth to another planet is 2/3 and the ratio of their mean densities is 4/5. If an astronaut can jump to a maximum height of 1.5 m on the earth, with the same effort, the maximumm height he can jump on the planet is (a) 1m (b) 0.8 m (c) 0.5 m (d) 1.25 m
Answer» . The ratio ot radii of earth to another planet is 2/3 and the ratio of their mean densities is 4/5. If an astronaut can jump to a maximum height of 1.5 m on the earth, with the same effort, the maximumm height he can jump on the planet is (a) 1m (b) 0.8 m (c) 0.5 m (d) 1.25 m

Discussion

264.	An reinforced beam of size 250mm×500mm (overall) is reinforced with 2 nos. of 16mm dia bars in compression side and 4 nos. of 20mm dia bars in tension side. The effective cover to both reinforcement is 40mm. The grade of materials used are M20 and Fe415 respectively. The stress in steel (on compression side) may be taken from table below:For balanced failure, the moment of resistance (in kNm, round off to two decimals) is _______kN-m.203
Answer» An reinforced beam of size $250 m m \times 500 m m$ (overall) is reinforced with $2$ nos. of $16 m m$ dia bars in compression side and $4$ nos. of $20 m m$ dia bars in tension side. The effective cover to both reinforcement is $40 m m$ . The grade of materials used are $M 20$ and $F e 415$ respectively. The stress in steel (on compression side) may be taken from table below:For balanced failure, the moment of resistance (in kNm, round off to two decimals) is _______kN-m. 203

Discussion

265.	What will happen to the reflected ray, if the incident ray falls along the normal to the mirror?
Answer» What will happen to the reflected ray, if the incident ray falls along the normal to the mirror?

Discussion

266.	A guitar produces a sound which has a frequency of 300 Hz and a wavelength of 1.3 m. Calculate the speed with which this sound travels.390
Answer» A guitar produces a sound which has a frequency of 300 Hz and a wavelength of 1.3 m. Calculate the speed with which this sound travels. 390

Discussion

267.	exxplain hydration energy
Answer» exxplain hydration energy

Discussion

268.	Why are our eyes more sensitive to blue light than yellow light? Is there any special pigment present?
Answer» Why are our eyes more sensitive to blue light than yellow light? Is there any special pigment present?

Discussion

269.	6. The linear charge density of the semicircular ringon both side is same in magnitude. The electricfield intensity at centre O is along(2) -i(4) -j(3) j
Answer» 6. The linear charge density of the semicircular ringon both side is same in magnitude. The electricfield intensity at centre O is along(2) -i(4) -j(3) j

Discussion

270.	Why don't photons collide with each other And if they do why can't we see light the n
Answer» Why don't photons collide with each other And if they do why can't we see light the n

270.

Why don't photons collide with each other And if they do why can't we see light the n

Answer»

Why don't photons collide with each other

And if they do why can't we see light the n

Discussion

271.	Question 17While playing tug of war, Preeti felt that the rope was slipping through her hands. Suggest a way out for her to prevent this.
Answer» Question 17 While playing tug of war, Preeti felt that the rope was slipping through her hands. Suggest a way out for her to prevent this.

Discussion

272.	What is the use of the flexible strip?
Answer» What is the use of the flexible strip?

Discussion

273.	A fly was sitting on a block. A man draws a triangle of area 4 cm2, thus enclosing the fly. He then applies a force of 20N and kills it with a flat stick. Calculate the pressure on that area.
Answer» A fly was sitting on a block. A man draws a triangle of area $4 {c m}^{2}$ , thus enclosing the fly. He then applies a force of 20N and kills it with a flat stick. Calculate the pressure on that area.

Discussion

274.	In LEDs, the longer lead is always connected to _______ terminal
Answer» In LEDs, the longer lead is always connected to _______ terminal

Discussion

275.	What is the distance between Sun and earth?
Answer» What is the distance between Sun and earth?

Discussion

276.	60. Calculate the molarity of the solution , when 100ml of 0.2molar H_2SO_4 and 100ml of 0.2 molar NaOH is added together.
Answer» 60. Calculate the molarity of the solution , when 100ml of 0.2molar H_2SO_4 and 100ml of 0.2 molar NaOH is added together.

Discussion

277.	Answer the following questions.(a) Why do knives and blades have sharp edges?(b) Why are ski-boards that are used to glide over ice long and broad?(c) Why does ink not spill out of an ink dropper?(d) Why does a plastic bottle full of steam get pressed in if placed in a refrigerator?
Answer» Answer the following questions. (a) Why do knives and blades have sharp edges? (b) Why are ski-boards that are used to glide over ice long and broad? (c) Why does ink not spill out of an ink dropper? (d) Why does a plastic bottle full of steam get pressed in if placed in a refrigerator?

277.

Answer the following questions.(a) Why do knives and blades have sharp edges?(b) Why are ski-boards that are used to glide over ice long and broad?(c) Why does ink not spill out of an ink dropper?(d) Why does a plastic bottle full of steam get pressed in if placed in a refrigerator?

Answer»

Answer the following questions.

(a) Why do knives and blades have sharp edges?

(b) Why are ski-boards that are used to glide over ice long and broad?

(c) Why does ink not spill out of an ink dropper?

(d) Why does a plastic bottle full of steam get pressed in if placed in a refrigerator?

Discussion

278.	What's required for a force to come in to play?
Answer» What's required for a force to come in to play?

Discussion

279.	Question 3Name three liquids, which when tested in the manner shown in Fig. 14.9, may cause the magnetic needle to deflect.
Answer» Question 3 Name three liquids, which when tested in the manner shown in Fig. 14.9, may cause the magnetic needle to deflect.

Discussion

280.	In XY−plane, there is surface charge density of 5×10−16 Cm−2 on a long uniformly charged sheet. A circular loop of radius 0.1 m makes an angle of 60∘ with Z-axis. Determine the electric flux through the loop ?
Answer» In $XY -$ plane, there is surface charge density of $5 \times 10^{- 16} {Cm}^{- 2}$ on a long uniformly charged sheet. A circular loop of radius $0.1 m$ makes an angle of $60^{\circ}$ with $Z-$ axis. Determine the electric flux through the loop ?

Discussion

281.	two point masses m are kept r dis†an ce apart .what will be the potential at 0.25 r dis†an ce from any one mass towards the other mass.
Answer» two point masses m are kept r dis†an ce apart .what will be the potential at 0.25 r dis†an ce from any one mass towards the other mass.

Discussion

282.	Write down the differences between the total internal reflection and reflection from a plane mirror?
Answer» Write down the differences between the total internal reflection and reflection from a plane mirror?

Discussion

283.	A liquid of mass m and specific heat c is heated to a temperature 2T. Another liquid of mass m/2 and specific heat 2c is heated to a temperature T. If these two liquids are mixed, the resulting temperature of the mixture is
Answer» A liquid of mass $m$ and specific heat $c$ is heated to a temperature $2 T$ . Another liquid of mass $m / 2$ and specific heat $2 c$ is heated to a temperature $T$ . If these two liquids are mixed, the resulting temperature of the mixture is

Discussion

284.	The surface of a concave mirror is pointed towards the sun. Light from the sun hits the mirror and converges to a point. How far is this converging point from the mirror's surface if the radius of curvature (R) of the mirror is 150 cm?
Answer» The surface of a concave mirror is pointed towards the sun. Light from the sun hits the mirror and converges to a point. How far is this converging point from the mirror's surface if the radius of curvature (R) of the mirror is 150 cm?

Discussion

285.	30. A special gas mixture used in bacterial growthchamber contains 1% by weight of CO, and 99%of O2. What is the partial pressure (in atm) of eachgas at a total pressure of 0.977 atm?0.1 atm0.970 atm, PO2(1) Po,(2) Po, = 0.970 atm, Pco, = 0.00711 atm0.1atm; Pco 0.9 atm(3) Po,Can't predict(4)
Answer» 30. A special gas mixture used in bacterial growthchamber contains 1% by weight of CO, and 99%of O2. What is the partial pressure (in atm) of eachgas at a total pressure of 0.977 atm?0.1 atm0.970 atm, PO2(1) Po,(2) Po, = 0.970 atm, Pco, = 0.00711 atm0.1atm; Pco 0.9 atm(3) Po,Can't predict(4)

Discussion

286.	Distinguish between speed and velocity.
Answer» Distinguish between speed and velocity.

Discussion

287.	Which of the below are used for constructing a simple periscope?
Answer» Which of the below are used for constructing a simple periscope?

Discussion

288.	Both a pair of scissors and a pair of pliers belong to the same class of levers. Name the class of lever.
Answer» Both a pair of scissors and a pair of pliers belong to the same class of levers. Name the class of lever.

Discussion

289.	Name the mirror which always forms an erect and virtual image. What is the size of the image as compared to that of the object ?
Answer» Name the mirror which always forms an erect and virtual image. What is the size of the image as compared to that of the object ?

Discussion

290.	The efficiency of a machine is the ratio between ___
Answer» The efficiency of a machine is the ratio between ___

Discussion

291.	(a) What is the number of prominent stars in the Orion? (b) Draw a diagram of the Orion constellation to show the position of prominent stars in it.
Answer» (a) What is the number of prominent stars in the Orion? (b) Draw a diagram of the Orion constellation to show the position of prominent stars in it.

291.

(a) What is the number of prominent stars in the Orion? (b) Draw a diagram of the Orion constellation to show the position of prominent stars in it.

Answer»

(a) What is the number of prominent stars in the Orion?

(b) Draw a diagram of the Orion constellation to show the position of prominent stars in it.

Discussion

292.	What are the Do's and Don'ts to be followed during a thunderstorm when a person is inside the house?
Answer» What are the Do's and Don'ts to be followed during a thunderstorm when a person is inside the house?

Discussion

293.	Write the construction duties of the following workers in detail.1. Mason2. Electrician3. Plumber
Answer» Write the construction duties of the following workers in detail. 1. Mason 2. Electrician 3. Plumber

Discussion

294.	Question 14You might have noticed that when used for a long time, slippers with rubber soles become slippery. Explain the reason.
Answer» Question 14 You might have noticed that when used for a long time, slippers with rubber soles become slippery. Explain the reason.

Discussion

295.	Name a simple machine which is responsible for changing the point of application of force.
Answer» Name a simple machine which is responsible for changing the point of application of force.

Discussion

296.	Explain the invariance property of charge in simple words
Answer» Explain the invariance property of charge in simple words

Discussion

297.	In the following figure, the part whose focal length can be changed is:-
Answer» In the following figure, the part whose focal length can be changed is:-

Discussion

298.	Define force and pressure.
Answer» Define force and pressure.

Discussion

299.	What are the two types of electricity as proposed by Benjamin Franklin ?
Answer» What are the two types of electricity as proposed by Benjamin Franklin ?

Discussion

300.	what is motion under gravity with all terms involved in it, alog with signs
Answer» what is motion under gravity with all terms involved in it, alog with signs

Discussion

Explore topic-wise InterviewSolutions in .

A block of mass 5 kg is at rest on a rough inclined surface. If angle of inclination of plane is 60^°, then force appliedby it on block is(1) 50 N(3) 25N(2) 25\sqrt3N(4) 50\sqrt3N

calculate the weight of gold having specific heat capacity 0.13 J per degree celcius per gram which is heated from 25 degree celcius to 300 degree celcius , where heat absorbed is 1500

If the intensity of a sound is increased to 16 times, then by how many times will the amplitude change?

2 mol of a ideal gas at 27Celsius temperature expanded reversibly from 3l to 20 l .Find entropy change[R=2cal/mol K]

The value of –25× –9 is ____________.

Question 14What happens to light when it gets dispersed? Give an example.

If angle between final and initial velocity is 90 ,then find change in velocity using vector concept.

What does the following images signify?

If the absolute temperature of the body is reduced to half the percentage decrease in the rate of loss of heat by radiation becomes nearly

The bright star-like object with a long tail approaching the Sun in a highly elliptical orbit is called _______.

Four containers contain water at the same height as shown in the figure below. Rank them according to the pressure exerted at the bottom of the containers in ascending order.

what will happen to the leaves of electroscope if a positively charged body is brought near

. The ratio ot radii of earth to another planet is 2/3 and the ratio of their mean densities is 4/5. If an astronaut can jump to a maximum height of 1.5 m on the earth, with the same effort, the maximumm height he can jump on the planet is (a) 1m (b) 0.8 m (c) 0.5 m (d) 1.25 m

What will happen to the reflected ray, if the incident ray falls along the normal to the mirror?

A guitar produces a sound which has a frequency of 300 Hz and a wavelength of 1.3 m. Calculate the speed with which this sound travels.390

exxplain hydration energy

Why are our eyes more sensitive to blue light than yellow light? Is there any special pigment present?

6. The linear charge density of the semicircular ringon both side is same in magnitude. The electricfield intensity at centre O is along(2) -i(4) -j(3) j

Why don't photons collide with each other And if they do why can't we see light the n

Question 17While playing tug of war, Preeti felt that the rope was slipping through her hands. Suggest a way out for her to prevent this.

What is the use of the flexible strip?

A fly was sitting on a block. A man draws a triangle of area 4 cm2, thus enclosing the fly. He then applies a force of 20N and kills it with a flat stick. Calculate the pressure on that area.

In LEDs, the longer lead is always connected to _______ terminal

What is the distance between Sun and earth?

60. Calculate the molarity of the solution , when 100ml of 0.2molar H_2SO_4 and 100ml of 0.2 molar NaOH is added together.

Answer the following questions.(a) Why do knives and blades have sharp edges?(b) Why are ski-boards that are used to glide over ice long and broad?(c) Why does ink not spill out of an ink dropper?(d) Why does a plastic bottle full of steam get pressed in if placed in a refrigerator?

What's required for a force to come in to play?

Question 3Name three liquids, which when tested in the manner shown in Fig. 14.9, may cause the magnetic needle to deflect.

In XY−plane, there is surface charge density of 5×10−16 Cm−2 on a long uniformly charged sheet. A circular loop of radius 0.1 m makes an angle of 60∘ with Z-axis. Determine the electric flux through the loop ?

two point masses m are kept r dis†an ce apart .what will be the potential at 0.25 r dis†an ce from any one mass towards the other mass.

Write down the differences between the total internal reflection and reflection from a plane mirror?

A liquid of mass m and specific heat c is heated to a temperature 2T. Another liquid of mass m/2 and specific heat 2c is heated to a temperature T. If these two liquids are mixed, the resulting temperature of the mixture is

The surface of a concave mirror is pointed towards the sun. Light from the sun hits the mirror and converges to a point. How far is this converging point from the mirror's surface if the radius of curvature (R) of the mirror is 150 cm?

30. A special gas mixture used in bacterial growthchamber contains 1% by weight of CO, and 99%of O2. What is the partial pressure (in atm) of eachgas at a total pressure of 0.977 atm?0.1 atm0.970 atm, PO2(1) Po,(2) Po, = 0.970 atm, Pco, = 0.00711 atm0.1atm; Pco 0.9 atm(3) Po,Can't predict(4)

Distinguish between speed and velocity.

Which of the below are used for constructing a simple periscope?

Both a pair of scissors and a pair of pliers belong to the same class of levers. Name the class of lever.

Name the mirror which always forms an erect and virtual image. What is the size of the image as compared to that of the object ?

The efficiency of a machine is the ratio between ___

(a) What is the number of prominent stars in the Orion? (b) Draw a diagram of the Orion constellation to show the position of prominent stars in it.

What are the Do's and Don'ts to be followed during a thunderstorm when a person is inside the house?

Write the construction duties of the following workers in detail.1. Mason2. Electrician3. Plumber

Question 14You might have noticed that when used for a long time, slippers with rubber soles become slippery. Explain the reason.

Name a simple machine which is responsible for changing the point of application of force.

Explain the invariance property of charge in simple words

In the following figure, the part whose focal length can be changed is:-

Define force and pressure.

What are the two types of electricity as proposed by Benjamin Franklin ?

what is motion under gravity with all terms involved in it, alog with signs