9478 + Interview Questions in Physics Page 43 InterviewSolution

2101.	what is the difference between rolling friction , sliding friction, kinetic friction
Answer» what is the difference between rolling friction , sliding friction, kinetic friction

Discussion

2102.	Question 19 Explain why the surface of mortar and pestle (silbatta) used for grinding is etched again after prolonged use?
Answer» Question 19 Explain why the surface of mortar and pestle (silbatta) used for grinding is etched again after prolonged use?

Discussion

2103.	The time period of oscillations is 0.5 s. L is 10 cm is known to have accuracy of 1mm. The time of 100 oscillations is measured with a wrist watch of 1s resolution .what is the accuracy in determination of g?
Answer» The time period of oscillations is 0.5 s. L is 10 cm is known to have accuracy of 1mm. The time of 100 oscillations is measured with a wrist watch of 1s resolution .what is the accuracy in determination of g?

Discussion

2104.	Paheli wanted to glow a torch bulb using a cell. She could not get connecting wires, instead, she got two strips of aluminium foil. Will she succeed? Explain, how?
Answer» Paheli wanted to glow a torch bulb using a cell. She could not get connecting wires, instead, she got two strips of aluminium foil. Will she succeed? Explain, how?

Discussion

2105.	frictional force is zero when a ring is doing pure rolling on an inclined planewhich is inclined at 30^0 with derivation not by formula through basic
Answer» frictional force is zero when a ring is doing pure rolling on an inclined planewhich is inclined at 30^0 with derivation not by formula through basic

Discussion

2106.	A block of mass M = 2 kg is resting on a rough horizontal surface for which the coefficient of friction is 0.2. When a force F = 20 N is applied, the acceleration of the block will be (g = 10 m/s2)
Answer» A block of mass M = 2 kg is resting on a rough horizontal surface for which the coefficient of friction is 0.2. When a force F = 20 N is applied, the acceleration of the block will be (g = 10 m/s2)

Discussion

2107.	A particle moves 3 m north, then 4 m east and finally 6 m south. Which of the following are correct about the distance travelled and the displacement?
Answer» A particle moves $3 m$ north, then $4 m$ east and finally $6 m$ south. Which of the following are correct about the distance travelled and the displacement?

Discussion

2108.	reason behind the flumm flying of aeroplan
Answer» reason behind the flumm flying of aeroplan

Discussion

2109.	101.An open U tube contain Mercury . When 13.6cm of water is poured into one of the arm of tube then Mercury rise in other arm from its initial level is
Answer» 101.An open U tube contain Mercury . When 13.6cm of water is poured into one of the arm of tube then Mercury rise in other arm from its initial level is

Discussion

2110.	A fly was sitting on a block. A man draws a circle of the area 2cm2, enclosing the fly. He then applies a force of 20N over the area. Calculate the pressure on that area.
Answer» A fly was sitting on a block. A man draws a circle of the area ${2 c m}^{2}$ , enclosing the fly. He then applies a force of 20N over the area. Calculate the pressure on that area.

Discussion

2111.	List two states in India where earthquakes are more likely to strike. [1 MARK]
Answer» List two states in India where earthquakes are more likely to strike. [1 MARK]

Discussion

2112.	34.Difference between charge separation and charge delocalisation
Answer» 34.Difference between charge separation and charge delocalisation

Discussion

2113.	What will be the focal length of a spherical mirror if distance of object from the mirror is (30+-0.5)cm and distance of image from the mirror is (10+-0.2)cm?
Answer» What will be the focal length of a spherical mirror if distance of object from the mirror is (30+-0.5)cm and distance of image from the mirror is (10+-0.2)cm?

Discussion

2114.	Match List -I (Post - tensioning system) with List - II (Type of anchorage) and select the correct answer using the codes given below the lists:List- IA. FreyssientB. Gifford-UdallC. Lee-McCallD. Magnel BlatonList- II1. Flat steel wedges in sandwich plates2. High strength nuts3. Split conical wedges4. Conical serrated concrete wedgesCodes: A B C D
Answer» Match List -I (Post - tensioning system) with List - II (Type of anchorage) and select the correct answer using the codes given below the lists: List- I A. Freyssient B. Gifford-Udall C. Lee-McCall D. Magnel Blaton List- II 1. Flat steel wedges in sandwich plates 2. High strength nuts 3. Split conical wedges 4. Conical serrated concrete wedges Codes: A B C D

Discussion

2115.	friend pain shop tailor trick wet
Answer» friend pain shop tailor trick wet

Discussion

2116.	ntTwo flasks of equal volume are connected to a narrow tube of negligible volume all at 27C and contain 0.7 moles of H2 at 0.5 atm . One of the flask is then immersed into a bath kept at 127C,while the other remains at 27*C.the final pressure in each flask isn
Answer» ntTwo flasks of equal volume are connected to a narrow tube of negligible volume all at 27C and contain 0.7 moles of H2 at 0.5 atm . One of the flask is then immersed into a bath kept at 127C,while the other remains at 27*C.the final pressure in each flask isn

Discussion

2117.	Your parents want to join you in a school. One school is near the air port and along the road having heavy traffic. Another school is much away both from air port and trafic, in a serene place with more trees around.If parents gives you choice of joining in either of the school, which school would you join and why?
Answer» Your parents want to join you in a school. One school is near the air port and along the road having heavy traffic. Another school is much away both from air port and trafic, in a serene place with more trees around.If parents gives you choice of joining in either of the school, which school would you join and why?

Discussion

2118.	Out of the following ions, which is most conducting in aqueous solution?Options: Cs+ Li+K+Na+EXPLAIN
Answer» Out of the following ions, which is most conducting in aqueous solution? Options: Cs+ Li+ K+ Na+ EXPLAIN

Discussion

2119.	What is moment of force?Is it a vector quantity?
Answer» What is moment of force?Is it a vector quantity?

Discussion

2120.	When we say heat is transferred from one body to another, in which direction does the heat flow?State the effects of heat.
Answer» When we say heat is transferred from one body to another, in which direction does the heat flow? State the effects of heat.

Discussion

2121.	A runner completes one round of a circular track of diameter 400 m in 40 s. What will be the distance covered and the displacement respectively at the end of 2 minutes 20 s?
Answer» A runner completes one round of a circular track of diameter 400 m in 40 s. What will be the distance covered and the displacement respectively at the end of 2 minutes 20 s?

Discussion

2122.	Is a force required to keep A body moving? Give appropriate examples to support vuou answer
Answer» Is a force required to keep A body moving? Give appropriate examples to support vuou answer

Discussion

2123.	At the junction of the optic nerve and the retina, there are no sensory cells, so no vision is possible at that spot. This area is called the ___ spot.
Answer» At the junction of the optic nerve and the retina, there are no sensory cells, so no vision is possible at that spot. This area is called the ___ spot.

Discussion

2124.	A ray of light enters into a glass slab of refractive index Mu from air if Lambda is the wavelength of light in air then the wavelength of light in glass slab is
Answer» A ray of light enters into a glass slab of refractive index Mu from air if Lambda is the wavelength of light in air then the wavelength of light in glass slab is

Discussion

2125.	11. At same temp. and under a pressure of 4atm, PCl5 is 10% dissociated. Calculate the pressure at which PCl5 will be 20% dissociated, temp. remaining same.
Answer» 11. At same temp. and under a pressure of 4atm, PCl5 is 10% dissociated. Calculate the pressure at which PCl5 will be 20% dissociated, temp. remaining same.

Discussion

2126.	40. Work done is either scaler or vector quantity .
Answer» 40. Work done is either scaler or vector quantity .

Discussion

2127.	Question 7: How does melting take place with a change in temperature? What is the melting point of ice in oF?
Answer» Question 7: How does melting take place with a change in temperature? What is the melting point of ice in oF?

2127.

Question 7: How does melting take place with a change in temperature? What is the melting point of ice in oF?

Answer»

Question 7:

How does melting take place with a change in temperature?

What is the melting point of ice in oF?

Discussion

2128.	When light passes through glass slab why it doesn't scatter into its component colours like prism ?
Answer» When light passes through glass slab why it doesn't scatter into its component colours like prism ?

Discussion

2129.	Two bodies of masses 4 kg 9 kg are moving on a rough horizontal surface with same speed. If the coefficient of friction for them is same then ratio of dis†an ce travelled by the two bodies before coming rest
Answer» Two bodies of masses 4 kg 9 kg are moving on a rough horizontal surface with same speed. If the coefficient of friction for them is same then ratio of dis†an ce travelled by the two bodies before coming rest

Discussion

2130.	15. What are material particles and explain ionisation.
Answer» 15. What are material particles and explain ionisation.

Discussion

2131.	Loudness of the sound is measured in ___
Answer» Loudness of the sound is measured in ___

Discussion

2132.	Can current flow through a bulb with a broken filament? Why?
Answer» Can current flow through a bulb with a broken filament? Why?

Discussion

2133.	Which of the following statements is false with regard to human brain?
Answer» Which of the following statements is false with regard to human brain?

Discussion

2134.	Q6. Find the value of x: a) (125/ 8) X (125/ 8)x = (5/2)18 b) 32x + 1 / 9 = 27
Answer» Q6. Find the value of x: a) (125/ 8) X (125/ 8)^x = (5/2)¹⁸ b) 3^{2x + 1} / 9 = 27

2134.

Q6. Find the value of x: a) (125/ 8) X (125/ 8)x = (5/2)18 b) 32x + 1 / 9 = 27

Answer»

Q6. Find the value of x:

a) (125/ 8) X (125/ 8)^x = (5/2)¹⁸

b) 3^{2x + 1} / 9 = 27

Discussion

2135.	elastic ball at rest with coefficient ofrestitutionis dropped from a height h on asmooth floor. The total distance covered by the ball(2) 5h(1)(3) 3h
Answer» elastic ball at rest with coefficient of restitution is dropped from a height h on a smooth floor. The total distance covered by the ball (2) 5h (1) (3) 3h

Discussion

2136.	Two plane mirrors are held parallel to each other and at an angle 45∘ to the line joining them as shown in figure. What will be the angle between incident ray and emergent ray ( ray after reflection from a second mirror) ?
Answer» Two plane mirrors are held parallel to each other and at an angle $45^{\circ}$ to the line joining them as shown in figure. What will be the angle between incident ray and emergent ray ( ray after reflection from a second mirror) ?

Discussion

2137.	A pipe open at both ends has a fundamental frequency f in air. The pipe is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is now
Answer» A pipe open at both ends has a fundamental frequency $f$ in air. The pipe is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is now

Discussion

2138.	How can we define pressure?
Answer» How can we define pressure?

Discussion

2139.	At what speed the velocity head of a stream of water be equal to 40 cm of Hg? a. 282.8 cm/s b. 432.6cm/s c. 632.6cm/s d. 832.6cm/s
Answer» At what speed the velocity head of a stream of water be equal to 40 cm of Hg? a. 282.8 cm/s b. 432.6cm/s c. 632.6cm/s d. 832.6cm/s

Discussion

2140.	To take the boat away from the bank of a river, the boatman pushes the bank with an oar. Why?
Answer» To take the boat away from the bank of a river, the boatman pushes the bank with an oar. Why?

Discussion

2141.	How many electrons are present in 3.2g sulphide ions ?
Answer» How many electrons are present in 3.2g sulphide ions ?

Discussion

2142.	A flywheel of moment of inertia 2 kg-m2 is rotated at a speed of 30 rad/s. A tangential force at the rim stopsthe wheel in 15 second. Average torque of the force is(1) 4 Nm(3) 8 Nm(2) 2 Nm(4) 1 Nm
Answer» A flywheel of moment of inertia 2 kg-m2 is rotated at a speed of 30 rad/s. A tangential force at the rim stopsthe wheel in 15 second. Average torque of the force is(1) 4 Nm(3) 8 Nm(2) 2 Nm(4) 1 Nm

Discussion

2143.	[2^1/2 + 3^1/2] / [32^1/2 - 23^1/2] = a-b*6^1/2Find the value of a & b
Answer» [2^1/2 + 3^1/2] / [32^1/2 - 23^1/2] = a-b*6^1/2 Find the value of a & b

Discussion

2144.	A force of 20 N acting on a body of mass 10 kg is found to double its velocity in 8 s. Find its initial velocity.
Answer» A force of $20 N$ acting on a body of mass $10 k g$ is found to double its velocity in $8 s$ . Find its initial velocity.

Discussion

2145.	charge Q is placed between q and 4q in a manner that it is 1m from q and 2m from 4q such that q and 4q are placed on opposite sides of Q.The charge on Q will be a)5KQq b)KQq c)2Kq^2 d)zer
Answer» charge Q is placed between q and 4q in a manner that it is 1m from q and 2m from 4q such that q and 4q are placed on opposite sides of Q.The charge on Q will be a)5KQq b)KQq c)2Kq^2 d)zer

Discussion

2146.	(a) What do you understand by the terms "balanced forces" and "unbalanced forces"? Explain with examples.(b) What type of forces - balanced or unbalanced - act on a rubber ball when we press it between or hands? What effect is produced in the ball?
Answer» (a) What do you understand by the terms "balanced forces" and "unbalanced forces"? Explain with examples. (b) What type of forces - balanced or unbalanced - act on a rubber ball when we press it between or hands? What effect is produced in the ball?

Discussion

2147.	56. A body of mass 2 kg floats in a liquid.What is the buoyant force on the body
Answer» 56. A body of mass 2 kg floats in a liquid.What is the buoyant force on the body

Discussion

2148.	The planets of the solar system revolve around the sun due to gravitational forces. Which force acts in the atom?
Answer» The planets of the solar system revolve around the sun due to gravitational forces. Which force acts in the atom?

Discussion

2149.	If the function fx=x2-1x-1,x≠1k,x=1 is given to be continuous at x = 1, then the value of k is ____________.
Answer» If the function $f (x) = \{\begin{matrix} \frac{x^{2} - 1}{x - 1}, & x \neq 1 \\ k, & x = 1 \end{matrix}$ is given to be continuous at x = 1, then the value of k is ____________.

Discussion

2150.	What is lateral inversion in a plane mirror?
Answer» What is lateral inversion in a plane mirror?

Discussion

Explore topic-wise InterviewSolutions in .

what is the difference between rolling friction , sliding friction, kinetic friction

Question 19 Explain why the surface of mortar and pestle (silbatta) used for grinding is etched again after prolonged use?

The time period of oscillations is 0.5 s. L is 10 cm is known to have accuracy of 1mm. The time of 100 oscillations is measured with a wrist watch of 1s resolution .what is the accuracy in determination of g?

Paheli wanted to glow a torch bulb using a cell. She could not get connecting wires, instead, she got two strips of aluminium foil. Will she succeed? Explain, how?

frictional force is zero when a ring is doing pure rolling on an inclined planewhich is inclined at 30^0 with derivation not by formula through basic

A block of mass M = 2 kg is resting on a rough horizontal surface for which the coefficient of friction is 0.2. When a force F = 20 N is applied, the acceleration of the block will be (g = 10 m/s2)

A particle moves 3 m north, then 4 m east and finally 6 m south. Which of the following are correct about the distance travelled and the displacement?

reason behind the flumm flying of aeroplan

101.An open U tube contain Mercury . When 13.6cm of water is poured into one of the arm of tube then Mercury rise in other arm from its initial level is

A fly was sitting on a block. A man draws a circle of the area 2cm2, enclosing the fly. He then applies a force of 20N over the area. Calculate the pressure on that area.

List two states in India where earthquakes are more likely to strike. [1 MARK]

34.Difference between charge separation and charge delocalisation

What will be the focal length of a spherical mirror if distance of object from the mirror is (30+-0.5)cm and distance of image from the mirror is (10+-0.2)cm?

friend pain shop tailor trick wet

ntTwo flasks of equal volume are connected to a narrow tube of negligible volume all at 27*C and contain 0.7 moles of H2 at 0.5 atm . One of the flask is then immersed into a bath kept at 127*C,while the other remains at 27*C.the final pressure in each flask isn

Out of the following ions, which is most conducting in aqueous solution?Options: Cs+ Li+K+Na+EXPLAIN

What is moment of force?Is it a vector quantity?

When we say heat is transferred from one body to another, in which direction does the heat flow?State the effects of heat.

A runner completes one round of a circular track of diameter 400 m in 40 s. What will be the distance covered and the displacement respectively at the end of 2 minutes 20 s?

Is a force required to keep A body moving? Give appropriate examples to support vuou answer

At the junction of the optic nerve and the retina, there are no sensory cells, so no vision is possible at that spot. This area is called the ___ spot.

A ray of light enters into a glass slab of refractive index Mu from air if Lambda is the wavelength of light in air then the wavelength of light in glass slab is

11. At same temp. and under a pressure of 4atm, PCl5 is 10% dissociated. Calculate the pressure at which PCl5 will be 20% dissociated, temp. remaining same.

40. Work done is either scaler or vector quantity .

Question 7: How does melting take place with a change in temperature? What is the melting point of ice in oF?

When light passes through glass slab why it doesn't scatter into its component colours like prism ?

Two bodies of masses 4 kg 9 kg are moving on a rough horizontal surface with same speed. If the coefficient of friction for them is same then ratio of dis†an ce travelled by the two bodies before coming rest

15. What are material particles and explain ionisation.

Loudness of the sound is measured in ___

Can current flow through a bulb with a broken filament? Why?

Which of the following statements is false with regard to human brain?

Q6. Find the value of x: a) (125/ 8) X (125/ 8)x = (5/2)18 b) 32x + 1 / 9 = 27

elastic ball at rest with coefficient ofrestitutionis dropped from a height h on asmooth floor. The total distance covered by the ball(2) 5h(1)(3) 3h

Two plane mirrors are held parallel to each other and at an angle 45∘ to the line joining them as shown in figure. What will be the angle between incident ray and emergent ray ( ray after reflection from a second mirror) ?

A pipe open at both ends has a fundamental frequency f in air. The pipe is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is now

How can we define pressure?

At what speed the velocity head of a stream of water be equal to 40 cm of Hg? a. 282.8 cm/s b. 432.6cm/s c. 632.6cm/s d. 832.6cm/s

To take the boat away from the bank of a river, the boatman pushes the bank with an oar. Why?

How many electrons are present in 3.2g sulphide ions ?

A flywheel of moment of inertia 2 kg-m2 is rotated at a speed of 30 rad/s. A tangential force at the rim stopsthe wheel in 15 second. Average torque of the force is(1) 4 Nm(3) 8 Nm(2) 2 Nm(4) 1 Nm

[2^1/2 + 3^1/2] / [3*2^1/2 - 2*3^1/2] = a-b*6^1/2Find the value of a & b

A force of 20 N acting on a body of mass 10 kg is found to double its velocity in 8 s. Find its initial velocity.

charge Q is placed between q and 4q in a manner that it is 1m from q and 2m from 4q such that q and 4q are placed on opposite sides of Q.The charge on Q will be a)5KQq b)KQq c)2Kq^2 d)zer

(a) What do you understand by the terms "balanced forces" and "unbalanced forces"? Explain with examples.​(b) What type of forces - balanced or unbalanced - act on a rubber ball when we press it between or hands? What effect is produced in the ball?

56. A body of mass 2 kg floats in a liquid.What is the buoyant force on the body

The planets of the solar system revolve around the sun due to gravitational forces. Which force acts in the atom?

If the function fx=x2-1x-1,x≠1k,x=1 is given to be continuous at x = 1, then the value of k is ____________.

What is lateral inversion in a plane mirror?

ntTwo flasks of equal volume are connected to a narrow tube of negligible volume all at 27C and contain 0.7 moles of H2 at 0.5 atm . One of the flask is then immersed into a bath kept at 127C,while the other remains at 27*C.the final pressure in each flask isn

[2^1/2 + 3^1/2] / [32^1/2 - 23^1/2] = a-b*6^1/2Find the value of a & b

(a) What do you understand by the terms "balanced forces" and "unbalanced forces"? Explain with examples.(b) What type of forces - balanced or unbalanced - act on a rubber ball when we press it between or hands? What effect is produced in the ball?