9478 + Interview Questions in Physics Page 93 InterviewSolution

4601.	A person rubbed two similar glass rods using a silk cloth. Turns out that the glass rods started to move away from each other slightly when they were placed together. What can be most logical reason for this observation?
Answer» A person rubbed two similar glass rods using a silk cloth. Turns out that the glass rods started to move away from each other slightly when they were placed together. What can be most logical reason for this observation?

Discussion

4602.	A butt weld joint is developed on steel plates having yield and ultimate tensile strength of 500 MPa and 700 MPa, respectively. the thickness of the plates is 8 mm and width is 20 mm. Improper selection of welding parameters caused an undercut of 3 mm depth along the weld. The maximum transverse tensile load (in kN) carrying capacity ofthe developed weld joint is 70
Answer» A butt weld joint is developed on steel plates having yield and ultimate tensile strength of 500 MPa and 700 MPa, respectively. the thickness of the plates is 8 mm and width is 20 mm. Improper selection of welding parameters caused an undercut of 3 mm depth along the weld. The maximum transverse tensile load (in kN) carrying capacity ofthe developed weld joint is 70

Discussion

4603.	Why speed increases when velocity and acceleration have same direction
Answer» Why speed increases when velocity and acceleration have same direction

Discussion

4604.	Which of the following would not have been possible if there was no friction?
Answer» Which of the following would not have been possible if there was no friction?

Discussion

4605.	two resistors of resistances 5ohm and 10ohm are connected parallel with a cell of emf of 3V and internal resistance 1ohm. Find the main current and current through each resistor.
Answer» two resistors of resistances 5ohm and 10ohm are connected parallel with a cell of emf of 3V and internal resistance 1ohm. Find the main current and current through each resistor.

Discussion

4606.	how to calculate error analysis when error is more than 5%?
Answer» how to calculate error analysis when error is more than 5%?

Discussion

4607.	An RCC beam of rectangular cross-section has factored shear of 200 kN at its critical section. Its width b is 250 mm and effective depth d is 350 mm. Assume design shear strength τc of concrete as 0.62 N/mm2 and maximum allowable sher stress τc,max in concrete as 2.8 N/mm2 . If two legged 10 mm diameter vertical stirrups of Fe 250 grade steel are used, then the required spacing (in cm, up to one decimal place) as per limit state method will be_________.8.2
Answer» An RCC beam of rectangular cross-section has factored shear of 200 kN at its critical section. Its width b is 250 mm and effective depth d is 350 mm. Assume design shear strength $τ_{c}$ of concrete as 0.62 N/mm $^{2}$ and maximum allowable sher stress $τ_{c, m a x}$ in concrete as 2.8 N/mm $^{2}$ . If two legged 10 mm diameter vertical stirrups of Fe 250 grade steel are used, then the required spacing (in cm, up to one decimal place) as per limit state method will be_________. 8.2

Discussion

4608.	A car travels the first half time with a uniform speed u and the next half time with a uniform speed v. Find its average speed.
Answer» A car travels the first half time with a uniform speed u and the next half time with a uniform speed v. Find its average speed.

Discussion

4609.	a uniform chain of mass M and length L is lying on a frictionless table in such a way that it's 1/3 part is hanging vertically down. the work done in pulling the chain up the table is: (1) MgL/3 (2) MgL/6 (3) MgL/9 (4) MgL/18
Answer» a uniform chain of mass M and length L is lying on a frictionless table in such a way that it's 1/3 part is hanging vertically down. the work done in pulling the chain up the table is: (1) MgL/3 (2) MgL/6 (3) MgL/9 (4) MgL/18

Discussion

4610.	A luminous body emits light of its own that enables us to see them. How is it possible to see other objects, which don't emit any light?
Answer» A luminous body emits light of its own that enables us to see them. How is it possible to see other objects, which don't emit any light?

Discussion

4611.	Applying pressure and reducing temperature to a gas can lead to
Answer» Applying pressure and reducing temperature to a gas can lead to

Discussion

4612.	Why do we prefer a convex mirror as a rear-view mirror in vehicles?
Answer» Why do we prefer a convex mirror as a rear-view mirror in vehicles?

Discussion

4613.	a mixture of two gases at 1520 mm Hg contains 75% N2 and 25% Ar by mole. The partial pressure of N2 and Ar(in mm Hg) will be respesctively A. 1140 and 380 B. 2026and 164 C. 380 and 1140 D. 164 and 2026
Answer» a mixture of two gases at 1520 mm Hg contains 75% N2 and 25% Ar by mole. The partial pressure of N2 and Ar(in mm Hg) will be respesctively A. 1140 and 380 B. 2026and 164 C. 380 and 1140 D. 164 and 2026

Discussion

4614.	Is it safe for an electrician to carry out electrical repairs outdoors during a heavy downpour? Explain.
Answer» Is it safe for an electrician to carry out electrical repairs outdoors during a heavy downpour? Explain.

Discussion

4615.	When a wave travels in a medium, displacement of aparticle is given by y a sin 2n (bt - cx), whereb, c are constants. The maximum particle velocitywill be twice the wave velocity, if\lbrack MHT CET 20141(d) c =1(a) b ac(b) b(c) c taacTta
Answer» When a wave travels in a medium, displacement of aparticle is given by y a sin 2n (bt - cx), whereb, c are constants. The maximum particle velocitywill be twice the wave velocity, if\lbrack MHT CET 20141(d) c =1(a) b ac(b) b(c) c taacTta

Discussion

4616.	A bird is in a wire cage hanging from a spring balance.The reading of the balance is taken when the bird is flyingabout in the cage, and when the bird is at rest in the cage. The first reading will be pess than the second.WHY
Answer» A bird is in a wire cage hanging from a spring balance.The reading of the balance is taken when the bird is flyingabout in the cage, and when the bird is at rest in the cage. The first reading will be pess than the second.WHY

Discussion

4617.	If z1=2-i ,z2=1+I, find. \| z1+z2+1/z1-z2+1\|.
Answer» If z1=2-i ,z2=1+I, find. \| z1+z2+1/z1-z2+1\|.

Discussion

4618.	What is meant by 'The sun enters a nakshatra' ? It is said that in the rainy season the sun enters the Mrug nakshatra. What does it mean?
Answer» What is meant by 'The sun enters a nakshatra' ? It is said that in the rainy season the sun enters the Mrug nakshatra. What does it mean?

Discussion

4619.	If a car is moving in the forward direction and has f1,f2 as the forces of friction in the front wheel and rear wheel then which of the following is correct?a)f1>f2b)f1
Answer» If a car is moving in the forward direction and has f1,f2 as the forces of friction in the front wheel and rear wheel then which of the following is correct? a)f1>f2 b)f1

Discussion

4620.	Give reasons.(a) It is not proper to measure quantities by using body parts as units.(b) It is necessary to get the weights and measures standardized at regular intervals.
Answer» Give reasons. (a) It is not proper to measure quantities by using body parts as units. (b) It is necessary to get the weights and measures standardized at regular intervals.

Discussion

4621.	Force of repulsion between two point charges placed at a distance d is F. What distance apart should they be kept in the medium so that the force between them is F/3?
Answer» Force of repulsion between two point charges placed at a distance d is F. What distance apart should they be kept in the medium so that the force between them is F/3?

Discussion

4622.	Given that the angle of friction is a, the coefficient of static friction is
Answer» Given that the angle of friction is a, the coefficient of static friction is

Discussion

4623.	Starting from rest ,the acceleration of a particle is2(t -1). The velocity of the particle at t- 5 sis:15 m/sа 3a(2) 25 m/so o(4) None of these(3) 5 m/s
Answer» Starting from rest ,the acceleration of a particle is2(t -1). The velocity of the particle at t- 5 sis:15 m/sа 3a(2) 25 m/so o(4) None of these(3) 5 m/s

Discussion

4624.	(a) What is the number of prominent stars in the Ursa Major? (b) Draw a diagram of Ursa Major constellation to show the position of main stars in it.
Answer» (a) What is the number of prominent stars in the Ursa Major? (b) Draw a diagram of Ursa Major constellation to show the position of main stars in it.

4624.

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

Answer»

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

(b) Draw a diagram of Ursa Major constellation to show the position of main stars in it.

Discussion

4625.	a gas expands isothermally against a constant external pressure of 1 atm from a vol 20L to 40 LIt absorbs 800J of thermal energy from its surroundings . the change in internal energy is?
Answer» a gas expands isothermally against a constant external pressure of 1 atm from a vol 20L to 40 L It absorbs 800J of thermal energy from its surroundings . the change in internal energy is?

Discussion

4626.	Characteristic of magnetic lines of force
Answer» Characteristic of magnetic lines of force

Discussion

4627.	Why was the ‘dry cell’ given this name?
Answer» Why was the ‘dry cell’ given this name?

Discussion

4628.	Question 03.3 Mention in the following case whether regular or diffused reflection will take place when a beam of light strikes. Justify your answer.Cardboard surface
Answer» Question 03.3 Mention in the following case whether regular or diffused reflection will take place when a beam of light strikes. Justify your answer. Cardboard surface

Discussion

4629.	Are shells K,L,M,N and shells s,d,p,f same??
Answer» Are shells K,L,M,N and shells s,d,p,f same??

Discussion

4630.	Why is it hard to move a filled box than an empty box? [2 MARKS]
Answer» Why is it hard to move a filled box than an empty box? [2 MARKS]

Discussion

4631.	In which direction does the magnetic field lines run inside a bar magnet?
Answer» In which direction does the magnetic field lines run inside a bar magnet?

Discussion

4632.	A plano-convex lens of refractive index 1.5 and radius of curvature 30 cm is silvered at the curved surface. Now, this lens has been used to form the image of an object. At what dis†an ce from this lens, an object be placed in order to have a real image of the size as that of the objec
Answer» A plano-convex lens of refractive index 1.5 and radius of curvature 30 cm is silvered at the curved surface. Now, this lens has been used to form the image of an object. At what dis†an ce from this lens, an object be placed in order to have a real image of the size as that of the objec

Discussion

4633.	A particle travels 10 m in first 5 sec and 10 m in next 3 sec. Assuming cons†an t acceleration what is the dis†an ce travelled in next 2 sec
Answer» A particle travels 10 m in first 5 sec and 10 m in next 3 sec. Assuming cons†an t acceleration what is the dis†an ce travelled in next 2 sec

Discussion

4634.	What are the dark spots on the Sun that appear in 11-year cycles called?
Answer» What are the dark spots on the Sun that appear in 11-year cycles called?

Discussion

4635.	If (Z^3 - 3)^2 + 16=0, then \|z\|=?
Answer» If (Z^3 - 3)^2 + 16=0, then \|z\|=?

Discussion

4636.	Simplify the given function and find the physical unit whose formula is represented. WIRVt Where W- work I – Current R- Resistance V- Volt t- Time
Answer» Simplify the given function and find the physical unit whose formula is represented. $\frac{W I R}{V t}$ Where W- work I – Current R- Resistance V- Volt t- Time

4636.

Simplify the given function and find the physical unit whose formula is represented. WIRVt Where W- work I – Current R- Resistance V- Volt t- Time

Answer»

Simplify the given function and find the physical unit whose formula is represented.

$\frac{W I R}{V t}$

Where

W- work

I – Current

R- Resistance

V- Volt

t- Time

Discussion

4637.	What are the factors that determine soil formation?
Answer» What are the factors that determine soil formation?

Discussion

4638.	A 183-bus power system has 150 PQ buses and 32 PV buses. In the general case, to obtain the load flow solution using Newton-Raphson method in polar co-ordinates, the minimum number of simultaneous equations to be solved is 332
Answer» A 183-bus power system has 150 PQ buses and 32 PV buses. In the general case, to obtain the load flow solution using Newton-Raphson method in polar co-ordinates, the minimum number of simultaneous equations to be solved is 332

Discussion

4639.	A neon-dioxygen mixture contains 70.6 g dioxygen and 167.5 g neon If pressure ofmixture of gases in the cylinder is 25 bar. What is the partial pressure of dioxygen and neon in the mixture? how to cnvert torr
Answer» A neon-dioxygen mixture contains 70.6 g dioxygen and 167.5 g neon If pressure ofmixture of gases in the cylinder is 25 bar. What is the partial pressure of dioxygen and neon in the mixture? how to cnvert torr

Discussion

4640.	Which of the following correctly supports the fact that bats can hunt at night?
Answer» Which of the following correctly supports the fact that bats can hunt at night?

Discussion

4641.	difference between amplitude and intensity of sound
Answer» difference between amplitude and intensity of sound

Discussion

4642.	[Ni(NH3)4] [NiCl4] , what should be the IUPAC name of this complex ?? especially how to check for charge on coordination sphere ??
Answer» [Ni(NH3)4] [NiCl4] , what should be the IUPAC name of this complex ?? especially how to check for charge on coordination sphere ??

Discussion

4643.	A car from}erst moves w} ith a } uniformin acceleration of }3m/sec^2 for 9min speed of the distance } tra} veled by the time.
Answer» A car from}erst moves w} ith a } uniformin acceleration of }3m/sec^2 for 9min speed of the distance } tra} veled by the time.

Discussion

4644.	a body covers 26m,28m,30m and 32m in 10th,11th,12th and 13th second respectively.then the initial velocity and acceleration is
Answer» a body covers 26m,28m,30m and 32m in 10th,11th,12th and 13th second respectively.then the initial velocity and acceleration is

Discussion

4645.	How does ice gets converted into liquid water?
Answer» How does ice gets converted into liquid water?

Discussion

4646.	20.A circular track has a circumference of 3140 m with AB as one of its diameter. A scooterist moves from A to B along the circular path with a uniform speed of 10 m/s.Find : (i) distance covered by the scooterist (ii) displacement of the scooterist (iii) time taken by the scooterist in reaching from A to B
Answer» 20.A circular track has a circumference of 3140 m with AB as one of its diameter. A scooterist moves from A to B along the circular path with a uniform speed of 10 m/s.Find : (i) distance covered by the scooterist (ii) displacement of the scooterist (iii) time taken by the scooterist in reaching from A to B

Discussion

4647.	Why convex mirror can't be used instead of concave mirror as a shaving mirror?
Answer» Why convex mirror can't be used instead of concave mirror as a shaving mirror?

Discussion

4648.	A metallic ball of radius r falls in a tank of water with speed v, now a ball of double radius is released in same tank, same metal, what would be the speed when acceleration becomes zero?
Answer» A metallic ball of radius $r$ falls in a tank of water with speed $v$ , now a ball of double radius is released in same tank, same metal, what would be the speed when acceleration becomes zero?

Discussion

4649.	Name the three tiny bones present in the middle part of ear.
Answer» Name the three tiny bones present in the middle part of ear.

Discussion

4650.	Metals are good conductors of electric current because they have a large number of __.
Answer» Metals are good conductors of electric current because they have a large number of __.

Discussion

Explore topic-wise InterviewSolutions in .

A person rubbed two similar glass rods using a silk cloth. Turns out that the glass rods started to move away from each other slightly when they were placed together. What can be most logical reason for this observation?

Why speed increases when velocity and acceleration have same direction

Which of the following would not have been possible if there was no friction?

two resistors of resistances 5ohm and 10ohm are connected parallel with a cell of emf of 3V and internal resistance 1ohm. Find the main current and current through each resistor.

how to calculate error analysis when error is more than 5%?

A car travels the first half time with a uniform speed u and the next half time with a uniform speed v. Find its average speed.

a uniform chain of mass M and length L is lying on a frictionless table in such a way that it's 1/3 part is hanging vertically down. the work done in pulling the chain up the table is: (1) MgL/3 (2) MgL/6 (3) MgL/9 (4) MgL/18

A luminous body emits light of its own that enables us to see them. How is it possible to see other objects, which don't emit any light?

Applying pressure and reducing temperature to a gas can lead to

Why do we prefer a convex mirror as a rear-view mirror in vehicles?

a mixture of two gases at 1520 mm Hg contains 75% N2 and 25% Ar by mole. The partial pressure of N2 and Ar(in mm Hg) will be respesctively A. 1140 and 380 B. 2026and 164 C. 380 and 1140 D. 164 and 2026

Is it safe for an electrician to carry out electrical repairs outdoors during a heavy downpour? Explain.

When a wave travels in a medium, displacement of aparticle is given by y a sin 2n (bt - cx), whereb, c are constants. The maximum particle velocitywill be twice the wave velocity, if\lbrack MHT CET 20141(d) c =1(a) b ac(b) b(c) c taacTta

A bird is in a wire cage hanging from a spring balance.The reading of the balance is taken when the bird is flyingabout in the cage, and when the bird is at rest in the cage. The first reading will be pess than the second.WHY

If z1=2-i ,z2=1+I, find. | z1+z2+1/z1-z2+1|.

What is meant by 'The sun enters a nakshatra' ? It is said that in the rainy season the sun enters the Mrug nakshatra. What does it mean?

If a car is moving in the forward direction and has f1,f2 as the forces of friction in the front wheel and rear wheel then which of the following is correct?a)f1>f2b)f1

Give reasons.(a) It is not proper to measure quantities by using body parts as units.(b) It is necessary to get the weights and measures standardized at regular intervals.

Force of repulsion between two point charges placed at a distance d is F. What distance apart should they be kept in the medium so that the force between them is F/3?

Given that the angle of friction is a, the coefficient of static friction is

Starting from rest ,the acceleration of a particle is2(t -1). The velocity of the particle at t- 5 sis:15 m/sа 3a(2) 25 m/so o(4) None of these(3) 5 m/s

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

a gas expands isothermally against a constant external pressure of 1 atm from a vol 20L to 40 LIt absorbs 800J of thermal energy from its surroundings . the change in internal energy is?

Characteristic of magnetic lines of force

Why was the ‘dry cell’ given this name?

Question 03.3 Mention in the following case whether regular or diffused reflection will take place when a beam of light strikes. Justify your answer.Cardboard surface

Are shells K,L,M,N and shells s,d,p,f same??

Why is it hard to move a filled box than an empty box? [2 MARKS]

In which direction does the magnetic field lines run inside a bar magnet?

A plano-convex lens of refractive index 1.5 and radius of curvature 30 cm is silvered at the curved surface. Now, this lens has been used to form the image of an object. At what dis†an ce from this lens, an object be placed in order to have a real image of the size as that of the objec

A particle travels 10 m in first 5 sec and 10 m in next 3 sec. Assuming cons†an t acceleration what is the dis†an ce travelled in next 2 sec

What are the dark spots on the Sun that appear in 11-year cycles called?

If (Z^3 - 3)^2 + 16=0, then |z|=?

Simplify the given function and find the physical unit whose formula is represented. WIRVt Where W- work I – Current R- Resistance V- Volt t- Time

What are the factors that determine soil formation?

A 183-bus power system has 150 PQ buses and 32 PV buses. In the general case, to obtain the load flow solution using Newton-Raphson method in polar co-ordinates, the minimum number of simultaneous equations to be solved is 332

A neon-dioxygen mixture contains 70.6 g dioxygen and 167.5 g neon If pressure ofmixture of gases in the cylinder is 25 bar. What is the partial pressure of dioxygen and neon in the mixture? how to cnvert torr

Which of the following correctly supports the fact that bats can hunt at night?

difference between amplitude and intensity of sound

[Ni(NH3)4] [NiCl4] , what should be the IUPAC name of this complex ?? especially how to check for charge on coordination sphere ??

A car from}erst moves w} ith a } uniformin acceleration of }3m/sec^2 for 9min speed of the distance } tra} veled by the time.

a body covers 26m,28m,30m and 32m in 10th,11th,12th and 13th second respectively.then the initial velocity and acceleration is

How does ice gets converted into liquid water?

Why convex mirror can't be used instead of concave mirror as a shaving mirror?

A metallic ball of radius r falls in a tank of water with speed v, now a ball of double radius is released in same tank, same metal, what would be the speed when acceleration becomes zero?

Name the three tiny bones present in the middle part of ear.

Metals are good conductors of electric current because they have a large number of __.