9478 + Interview Questions in Physics

1.	Give 5 difference between thrust and pressure .
Answer» Give 5 difference between thrust and pressure .

Discussion

2.	Q the average velocity of a particle executing SHM with an amplitude A and frequency w during one oscillation is?
Answer» Q the average velocity of a particle executing SHM with an amplitude A and frequency w during one oscillation is?

Discussion

3.	Two equal point charges A and B are R dis†an ce apart. A third point charge placed on the perpendicular bisector at a dis†an ce d from the centre will experience maximum electrostatic force when
Answer» Two equal point charges A and B are R dis†an ce apart. A third point charge placed on the perpendicular bisector at a dis†an ce d from the centre will experience maximum electrostatic force when

Discussion

4.	0.1 M HCL,200 ml and 0.1M NAOH was mixed in the container.concentration of hydroxide ions in the mixture will b
Answer» 0.1 M HCL,200 ml and 0.1M NAOH was mixed in the container.concentration of hydroxide ions in the mixture will b

Discussion

5.	An object of length 6 cm is placed on the principal axis of a concave mirror of a focal length f at a distance of 4 f the length of the image will be
Answer» An object of length 6 cm is placed on the principal axis of a concave mirror of a focal length f at a distance of 4 f the length of the image will be

Discussion

6.	a heat flux of 4000 joule per sec is to be passed through a copper rod of length 10 cm and area 100cm^{2 }the thermal conductivitu of copper is 400Wper mdegree centrigrade. the two ends of this rod must be kept at a room temperature differenceo
Answer» a heat flux of 4000 joule per sec is to be passed through a copper rod of length 10 cm and area 100cm^{2 }the thermal conductivitu of copper is 400Wper mdegree centrigrade. the two ends of this rod must be kept at a room temperature differenceo

Discussion

7.	The biggest gap in electronegativity is 1.B→ Al 2.Al→ Ga 3.Ga→ In 4.In→ T
Answer» The biggest gap in electronegativity is 1.B→ Al 2.Al→ Ga 3.Ga→ In 4.In→ T

Discussion

8.	refractive index of a medium is μ.the angle of incidence is twice the angle of refraction.the
Answer» refractive index of a medium is μ.the angle of incidence is twice the angle of refraction.the

Discussion

9.	When water is heated in a container, its level rises because of ___ expansion. cubical
Answer» When water is heated in a container, its level rises because of ___ expansion. cubical

9.

When water is heated in a container, its level rises because of ___ expansion. cubical

Answer»

When water is heated in a container, its level rises because of ___ expansion.

cubical

Discussion

10.	A man throws a ball with speed u at angle thita to ground find the time at which velocity is perpendicular to initial velocity .also find velocity at that instant
Answer» A man throws a ball with speed u at angle thita to ground find the time at which velocity is perpendicular to initial velocity .also find velocity at that instant

Discussion

11.	98.A weightless thread can bear tension upto 3.7 Kg wt. A stone of mass 500 gms is tied to it and revolve in a circular path of radius 4m in a vertical plane. If g = 10m/s , then the maximum angular velocity of the stone will be (1) 4 rad/sec (2) 16 rad/sec (1) 21 rad/sec (1) 2 rad/sec
Answer» 98.A weightless thread can bear tension upto 3.7 Kg wt. A stone of mass 500 gms is tied to it and revolve in a circular path of radius 4m in a vertical plane. If g = 10m/s , then the maximum angular velocity of the stone will be (1) 4 rad/sec (2) 16 rad/sec (1) 21 rad/sec (1) 2 rad/sec

Discussion

12.	Why do people need and observe weather?
Answer» Why do people need and observe weather?

Discussion

13.	Which of the following are examples of lateral inversion?
Answer» Which of the following are examples of lateral inversion?

Discussion

14.	Question 6In the curve half the wavelength is(a) A B(b) B D(c) D E(d) A E
Answer» Question 6 In the curve half the wavelength is (a) A B (b) B D (c) D E (d) A E

Discussion

15.	Why is cooling produced when a liquid evaporates?
Answer» Why is cooling produced when a liquid evaporates?

Discussion

16.	Considering the speed of light in a medium, pick the odd one out.
Answer» Considering the speed of light in a medium, pick the odd one out.

Discussion

17.	Change the sentence to the active voice. Is the pudding being made by the cook?
Answer» Change the sentence to the active voice. Is the pudding being made by the cook?

17.

Change the sentence to the active voice. Is the pudding being made by the cook?

Answer»

Change the sentence to the active voice.

Is the pudding being made by the cook?

Discussion

18.	Question 03.5 Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. Justify your Solution in each case.Mirror
Answer» Question 03.5 Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. Justify your Solution in each case. Mirror

Discussion

19.	A car of mass 1,000 kg is moving at a speed of 20 ms−1.It is brought to rest at a distance of 50 m. Calculate the net force acting on the car.
Answer» A car of mass $1, 000 k g$ is moving at a speed of $20 m s^{- 1}$ . It is brought to rest at a distance of $50 m$ . Calculate the net force acting on the car.

Discussion

20.	A wire 1 m long has a resistance of 1Ω. If it is uniformly stretched, so that its length increases by 25%, then its resistance will increase by:
Answer» A wire 1 m long has a resistance of 1Ω. If it is uniformly stretched, so that its length increases by 25%, then its resistance will increase by:

Discussion

21.	The flow of electrons isknown as electric current. Then why the way in which electrons flow is different from the way in which the electric current flows.
Answer» The flow of electrons isknown as electric current. Then why the way in which electrons flow is different from the way in which the electric current flows.

Discussion

22.	A bus departs from the bus stand at 14:20 hours. It takes 6 hours and 23 minutes to reach the destination bus stand. What will be the time of arrival shown on a 12-hour clock?
Answer» A bus departs from the bus stand at $14:20 hours$ . It takes $6 hours$ and $23 minutes$ to reach the destination bus stand. What will be the time of arrival shown on a $12-hour$ clock?

Discussion

23.	If the maximum number of trials required to openall locks when there are n locks and n keys is 105,then n =
Answer» If the maximum number of trials required to openall locks when there are n locks and n keys is 105,then n =

Discussion

24.	Relative density of a body on the surface of Earth is given by R1 and the relative density of the same body on moon is given by R2. Then, the correct relationship between R1 and R2 will be .
Answer» Relative density of a body on the surface of Earth is given by $R_{1}$ and the relative density of the same body on moon is given by $R_{2}$ . Then, the correct relationship between $R_{1}$ and $R_{2}$ will be .

Discussion

25.	The image of an object is formed ___.
Answer» The image of an object is formed ___.

Discussion

26.	In a process, 120 J heat is given to O2 gas and 180 J work is done on the gas. The molar heat capacity for this process is ? (Assume gas is ideal and gas constant is R)
Answer» In a process, 120 J heat is given to O2 gas and 180 J work is done on the gas. The molar heat capacity for this process is ? (Assume gas is ideal and gas constant is R)

Discussion

27.	An unknown metal of mass 192 g heated to a temperature of 100∘C was immersed into a brass calorimeter of mass 128 g containing 240 g of water at a temperature of 8.4∘C. Calculate the specific heat of the unknown metal, if water temperature stablizes at 21.5∘C.(Specific heat of brass is 394 J kg−1K−1)
Answer» An unknown metal of mass $192 g$ heated to a temperature of $100^{\circ} C$ was immersed into a brass calorimeter of mass $128 g$ containing $240 g$ of water at a temperature of ${8.4}^{\circ} C$ . Calculate the specific heat of the unknown metal, if water temperature stablizes at ${21.5}^{\circ} C$ . (Specific heat of brass is $394 {J kg}^{- 1} K^{- 1}$ )

Discussion

28.	What is astigmatism?
Answer» What is astigmatism?

Discussion

29.	A wave function expressing the displacement(y) as a function of its position(x) and time(t) is given as y =P Log(Qx+e^-Rt). Which of the following expressions has the dimensions different from others? (1)yR (2)PR (3)R/Q (4)QR
Answer» A wave function expressing the displacement(y) as a function of its position(x) and time(t) is given as y =P Log(Qx+e^-Rt). Which of the following expressions has the dimensions different from others? (1)yR (2)PR (3)R/Q (4)QR

Discussion

30.	Show that for each nautral number n, the fraction is in its lowestform.
Answer» Show that for each nautral number n, the fraction is in its lowestform.

Discussion

31.	What are the factors on which the magnitude of drag exerted by a fluid on an object moving through it depends?
Answer» What are the factors on which the magnitude of drag exerted by a fluid on an object moving through it depends?

Discussion

32.	A copper ball of mass 100gm is at a temperature T. It is dropped in a copper calorimeter of mass 100gm, filled with 170gm of water at room temperature. Subsequently, the temperature of the system is found to be 75oC. T is equal to(Given : Room temperature =30oC, specific heat of copper =0.1 cal/gmoC)
Answer» A copper ball of mass $100 g m$ is at a temperature $T$ . It is dropped in a copper calorimeter of mass $100 g m$ , filled with $170 g m$ of water at room temperature. Subsequently, the temperature of the system is found to be $75^{o} C$ . $T$ is equal to (Given : Room temperature $= 30^{o} C$ , specific heat of copper $= 0.1 c a l / g m^{o} C$ )

Discussion

33.	If the sliding friction between two surfaces is found to be 8N, then the static friction between these two surfaces is most likely to be: (a) 5N (b) 10N (c) 4 N (d) 2N
Answer» If the sliding friction between two surfaces is found to be 8N, then the static friction between these two surfaces is most likely to be: (a) 5N (b) 10N (c) 4 N (d) 2N

Discussion

34.	8. A bob of a simple pendulum executing SHM in air has time period To and in water has time period T.If density of bob is 4/3 x 10^3 kg/m^3, then correct relation between T and To is (Neglect friction) (1) T=To (2) T=To÷2 (3) T=2To (4) T=4o
Answer» 8. A bob of a simple pendulum executing SHM in air has time period To and in water has time period T.If density of bob is 4/3 x 10^3 kg/m^3, then correct relation between T and To is (Neglect friction) (1) T=To (2) T=To÷2 (3) T=2To (4) T=4o

Discussion

35.	A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conduct an amount of heat Q in time T.the metallic rod is melted and the materials is formed in toa a rod of half the radius of the original rod what is the amount of heat conducted by the new rod when placed in thermal contact with the two reservoirs in time T ?
Answer» A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conduct an amount of heat Q in time T.the metallic rod is melted and the materials is formed in toa a rod of half the radius of the original rod what is the amount of heat conducted by the new rod when placed in thermal contact with the two reservoirs in time T ?

Discussion

36.	Describe the construction of a kaleidoscope.
Answer» Describe the construction of a kaleidoscope.

Discussion

37.	Question 25Two friends are trying to push a heavy load as shown in figure. Suggest a way which will make this task easier for them.
Answer» Question 25 Two friends are trying to push a heavy load as shown in figure. Suggest a way which will make this task easier for them.

Discussion

38.	6 moles of hydrogen are mixed with n moles of He. The mos probable speed of gas molecular in the mixture is 2√3 times the speed of sound in mixture. Findd the value of n
Answer» $6$ moles of hydrogen are mixed with $n$ moles of $H e$ . The mos probable speed of gas molecular in the mixture is $\frac{2}{\sqrt{3}}$ times the speed of sound in mixture. Findd the value of $n$

Discussion

39.	12. A ball is thrown vertically upwards with speed u. Ifit experiences a constant air resistance force ofmagnitude f, then the speed with which ball strikesthe ground, (weight of ball is w) isW+f1/2(1) V = uW - f1/2((w-f)(w+f)(2) v= u1/22(w +f)u(3) v=(W-f)1/2(W+f)2(w-f).(4) V = u
Answer» 12. A ball is thrown vertically upwards with speed u. Ifit experiences a constant air resistance force ofmagnitude f, then the speed with which ball strikesthe ground, (weight of ball is w) isW+f1/2(1) V = uW - f1/2((w-f)(w+f)(2) v= u1/22(w +f)u(3) v=(W-f)1/2(W+f)2(w-f).(4) V = u

Discussion

40.	A container is filled with liquid up to 20 cm. The pressure at the bottom of the liquid column is 10 Pa. Find the density of the liquid. GIven: Acceleration due to gravity, g = 10 m/s2.
Answer» A container is filled with liquid up to $20 c m$ . The pressure at the bottom of the liquid column is $10 P a$ . Find the density of the liquid. GIven: Acceleration due to gravity, g = $10 m / s^{2}$ .

40.

A container is filled with liquid up to 20 cm. The pressure at the bottom of the liquid column is 10 Pa. Find the density of the liquid. GIven: Acceleration due to gravity, g = 10 m/s2.

Answer»

A container is filled with liquid up to $20 c m$ . The pressure at the bottom of the liquid column is $10 P a$ . Find the density of the liquid.

GIven: Acceleration due to gravity, g = $10 m / s^{2}$ .

Discussion

41.	Why is the buoyant force equal in different liquids with same object?
Answer» Why is the buoyant force equal in different liquids with same object?

Discussion

42.	Tap water is a good conductor of electricity because
Answer» Tap water is a good conductor of electricity because

Discussion

43.	A light of frequency 6×1014 Hz and velocity 3×108 m/s in air is incident on a glass slab of density 2500 kg/m3. Frequency of light in the glass is:(Consider density of air as 1.25 kg/m3)
Answer» A light of frequency $6 \times 10^{14} Hz$ and velocity $3 \times 10^{8} m/s$ in air is incident on a glass slab of density $2500 {kg/m}^{3}$ . Frequency of light in the glass is: (Consider density of air as $1.25 {kg/m}^{3})$

Discussion

44.	How the image formed gets inverted when the object is placed at the focus in case of concave mirror ?
Answer» How the image formed gets inverted when the object is placed at the focus in case of concave mirror ?

Discussion

45.	Which of the following is correct when a person walks on a rough surface? a) The friction force exerted by the surface keep him moving. b) The force which the man exerts on the floor keep him moving. c) The reaction of the force which the man exerts on floor keep him moving. d) None of the above.
Answer» Which of the following is correct when a person walks on a rough surface? a) The friction force exerted by the surface keep him moving. b) The force which the man exerts on the floor keep him moving. c) The reaction of the force which the man exerts on floor keep him moving. d) None of the above.

Discussion

46.	How many machnical waves are there?
Answer» How many machnical waves are there?

Discussion

47.	67Mass of sulphur present in 1.2 g molecule ofS2(g) is(1) 7.68 g(3) 38.4 g(2) 19.2 g(4) 48 g
Answer» 67Mass of sulphur present in 1.2 g molecule ofS2(g) is(1) 7.68 g(3) 38.4 g(2) 19.2 g(4) 48 g

Discussion

48.	A uniform chain of length 12 cm and mass 2 kg is lying on a smooth table and one third of its length is hanging vertically down over the edge of the table. If g is acceleration due to gravity the work required to pull the hanging part on to the table is [Take g = 10 m/s^2]
Answer» A uniform chain of length 12 cm and mass 2 kg is lying on a smooth table and one third of its length is hanging vertically down over the edge of the table. If g is acceleration due to gravity the work required to pull the hanging part on to the table is [Take g = 10 m/s^2]

Discussion

49.	The mass of the bullet is 2 kg and velocity of bullet after firing is 25 ms−1. If initial velocity of gun and bullet is zero, what is the final momentum of gun after firing?
Answer» The mass of the bullet is $2 k g$ and velocity of bullet after firing is $25 m s^{- 1}$ . If initial velocity of gun and bullet is zero, what is the final momentum of gun after firing?

Discussion

50.	Question 5A passenger in a moving train tosses a coin which falls behind him. It means that motion of the train is(a) accelerated(b) uniform(c) retarded(d) along circular tracks
Answer» Question 5 A passenger in a moving train tosses a coin which falls behind him. It means that motion of the train is (a) accelerated (b) uniform (c) retarded (d) along circular tracks

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Give 5 difference between thrust and pressure .

Q the average velocity of a particle executing SHM with an amplitude A and frequency w during one oscillation is?

Two equal point charges A and B are R dis†an ce apart. A third point charge placed on the perpendicular bisector at a dis†an ce d from the centre will experience maximum electrostatic force when

0.1 M HCL,200 ml and 0.1M NAOH was mixed in the container.concentration of hydroxide ions in the mixture will b

An object of length 6 cm is placed on the principal axis of a concave mirror of a focal length f at a distance of 4 f the length of the image will be

a heat flux of 4000 joule per sec is to be passed through a copper rod of length 10 cm and area 100cm^{2 }the thermal conductivitu of copper is 400Wper mdegree centrigrade. the two ends of this rod must be kept at a room temperature differenceo

The biggest gap in electronegativity is 1.B→ Al 2.Al→ Ga 3.Ga→ In 4.In→ T

refractive index of a medium is μ.the angle of incidence is twice the angle of refraction.the

When water is heated in a container, its level rises because of ___ expansion. cubical

A man throws a ball with speed u at angle thita to ground find the time at which velocity is perpendicular to initial velocity .also find velocity at that instant

98.A weightless thread can bear tension upto 3.7 Kg wt. A stone of mass 500 gms is tied to it and revolve in a circular path of radius 4m in a vertical plane. If g = 10m/s , then the maximum angular velocity of the stone will be (1) 4 rad/sec (2) 16 rad/sec (1) 21 rad/sec (1) 2 rad/sec

Why do people need and observe weather?

Which of the following are examples of lateral inversion?

Question 6In the curve half the wavelength is(a) A B(b) B D(c) D E(d) A E​​​​​​​

​​​​​​Why is cooling produced when a liquid evaporates?

Considering the speed of light in a medium, pick the odd one out.

Change the sentence to the active voice. Is the pudding being made by the cook?

Question 03.5 Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. Justify your Solution in each case.Mirror

A car of mass 1,000 kg is moving at a speed of 20 ms−1.It is brought to rest at a distance of 50 m. Calculate the net force acting on the car.

A wire 1 m long has a resistance of 1Ω. If it is uniformly stretched, so that its length increases by 25%, then its resistance will increase by:

The flow of electrons isknown as electric current. Then why the way in which electrons flow is different from the way in which the electric current flows.

A bus departs from the bus stand at 14:20 hours. It takes 6 hours and 23 minutes to reach the destination bus stand. What will be the time of arrival shown on a 12-hour clock?

If the maximum number of trials required to openall locks when there are n locks and n keys is 105,then n =

Relative density of a body on the surface of Earth is given by R1 and the relative density of the same body on moon is given by R2. Then, the correct relationship between R1 and R2 will be .

The image of an object is formed ___.

In a process, 120 J heat is given to O2 gas and 180 J work is done on the gas. The molar heat capacity for this process is ? (Assume gas is ideal and gas constant is R)

What is astigmatism?

A wave function expressing the displacement(y) as a function of its position(x) and time(t) is given as y =P Log(Qx+e^-Rt). Which of the following expressions has the dimensions different from others? (1)yR (2)PR (3)R/Q (4)QR

Show that for each nautral number n, the fraction is in its lowestform.

What are the factors on which the magnitude of drag exerted by a fluid on an object moving through it depends?

If the sliding friction between two surfaces is found to be 8N, then the static friction between these two surfaces is most likely to be: (a) 5N (b) 10N (c) 4 N (d) 2N

8. A bob of a simple pendulum executing SHM in air has time period To and in water has time period T.If density of bob is 4/3 x 10^3 kg/m^3, then correct relation between T and To is (Neglect friction) (1) T=To (2) T=To÷2 (3) T=2To (4) T=4o

Describe the construction of a kaleidoscope.

Question 25Two friends are trying to push a heavy load as shown in figure. Suggest a way which will make this task easier for them.

6 moles of hydrogen are mixed with n moles of He. The mos probable speed of gas molecular in the mixture is 2√3 times the speed of sound in mixture. Findd the value of n

12. A ball is thrown vertically upwards with speed u. Ifit experiences a constant air resistance force ofmagnitude f, then the speed with which ball strikesthe ground, (weight of ball is w) isW+f1/2(1) V = uW - f1/2((w-f)(w+f)(2) v= u1/22(w +f)u(3) v=(W-f)1/2(W+f)2(w-f).(4) V = u

A container is filled with liquid up to 20 cm. The pressure at the bottom of the liquid column is 10 Pa. Find the density of the liquid. GIven: Acceleration due to gravity, g = 10 m/s2.

Why is the buoyant force equal in different liquids with same object?

Tap water is a good conductor of electricity because

A light of frequency 6×1014 Hz and velocity 3×108 m/s in air is incident on a glass slab of density 2500 kg/m3. Frequency of light in the glass is:(Consider density of air as 1.25 kg/m3)

How the image formed gets inverted when the object is placed at the focus in case of concave mirror ?

Which of the following is correct when a person walks on a rough surface? a) The friction force exerted by the surface keep him moving. b) The force which the man exerts on the floor keep him moving. c) The reaction of the force which the man exerts on floor keep him moving. d) None of the above.

How many machnical waves are there?

67Mass of sulphur present in 1.2 g molecule ofS2(g) is(1) 7.68 g(3) 38.4 g(2) 19.2 g(4) 48 g

A uniform chain of length 12 cm and mass 2 kg is lying on a smooth table and one third of its length is hanging vertically down over the edge of the table. If g is acceleration due to gravity the work required to pull the hanging part on to the table is [Take g = 10 m/s^2]

The mass of the bullet is 2 kg and velocity of bullet after firing is 25 ms−1. If initial velocity of gun and bullet is zero, what is the final momentum of gun after firing?

Question 5A passenger in a moving train tosses a coin which falls behind him. It means that motion of the train is(a) accelerated(b) uniform(c) retarded(d) along circular tracks

Question 6In the curve half the wavelength is(a) A B(b) B D(c) D E(d) A E

Why is cooling produced when a liquid evaporates?