13232 + Interview Questions in Physics Page 114 InterviewSolution

5651.	from a height two balls are thrown with same speed upward and downward .they take t1 and t2 time to reach the ground if third ball is dropped from same height find time taken by it to reach the ground
Answer» from a height two balls are thrown with same speed upward and downward .they take t1 and t2 time to reach the ground if third ball is dropped from same height find time taken by it to reach the ground

Discussion

5652.	It takes 5 years for light to reach the earth from A Star. Express the distance of Star from the earth in (a) Light year (b) km.
Answer» It takes 5 years for light to reach the earth from A Star. Express the distance of Star from the earth in (a) Light year (b) km.

Discussion

5653.	A battery of EMF 10 V, with internal resistance 1 Ω is being charged by a 120 V d.c. supply using a series resistance of 10 Ω. The terminal voltage of the battery isa)20 Vb)10 Vc)0d)30 V
Answer» A battery of EMF 10 V, with internal resistance 1 Ω is being charged by a 120 V d.c. supply using a series resistance of 10 Ω. The terminal voltage of the battery is a)20 V b)10 V c)0 d)30 V

Discussion

5654.	The momentum of an object of mass 2 kg moving with a velocity of 9 m/s is _______ .
Answer» The momentum of an object of mass $2 kg$ moving with a velocity of $9 m/s$ is _______ .

Discussion

5655.	What is the magnitude and direction of the resultant of 4 coplanar forces as follows: F1 vector = 20 N Due East F2 vector = 40 N due West F3 vector = 50√2 N due north west F4 vector = 20√2 N due south west
Answer» What is the magnitude and direction of the resultant of 4 coplanar forces as follows: F₁ vector = 20 N Due East F₂vector = 40 N due West F₃vector = 50√2 N due north west F₄vector = 20√2 N due south west

5655.

What is the magnitude and direction of the resultant of 4 coplanar forces as follows: F1 vector = 20 N Due East F2 vector = 40 N due West F3 vector = 50√2 N due north west F4 vector = 20√2 N due south west

Answer»

What is the magnitude and direction of the resultant of 4 coplanar forces as follows:

F₁ vector = 20 N Due East

F₂vector = 40 N due West

F₃vector = 50√2 N due north west

F₄vector = 20√2 N due south west

Discussion

5656.	What is point of mass?
Answer» What is point of mass?

Discussion

5657.

Complete these sentences - Animals Actions A butterfly can fly. A myna _____. _ can wriggle. An elephant _____. _ can hop. You ________.

Answer» Complete these sentences -

Animals	Actions
A butterfly	can fly.
A myna	___________.
___________	can wriggle.
An elephant	_______________.
_____________	can hop.
You	______________.

Discussion

5658.	a particle is moving with initial velocity u=i-j+k what should be its acceleration so that it remains moving in the same straight lin
Answer» a particle is moving with initial velocity u=i-j+k what should be its acceleration so that it remains moving in the same straight lin

Discussion

5659.	103.A body is projected with speed V at some angle from the ground so that its horizontal range is two times the maximum height. Then maximum height is (g=10m/s2)
Answer» 103.A body is projected with speed V at some angle from the ground so that its horizontal range is two times the maximum height. Then maximum height is (g=10m/s2)

Discussion

5660.	A particle moves along the circumference of a circle with radius 2 m. It completes 5 revolutions in 10 seconds. Calculate its speed.
Answer» A particle moves along the circumference of a circle with radius 2 m. It completes 5 revolutions in 10 seconds. Calculate its speed.

Discussion

5661.	Examples of inertia of motion
Answer» Examples of inertia of motion

Discussion

5662.	The current passing through a wire is 5A. If the resistance of the wire is 4Ώ, then what is the work done to move a charge of 4C across the wire if the potential difference is kept constant?
Answer» The current passing through a wire is 5A. If the resistance of the wire is 4Ώ, then what is the work done to move a charge of 4C across the wire if the potential difference is kept constant?

Discussion

5663.	A sound travels from east to west, in which direction do the particles of air move?
Answer» A sound travels from east to west, in which direction do the particles of air move?

Discussion

5664.	The transfer function of a closed loop system is :T(s)=Ks2+(3−K)(s+1) Where K is the forward path gain. The root locus plot of the system is :
Answer» The transfer function of a closed loop system is : $T (s) = \frac{K}{s^{2} + (3 - K) (s + 1)}$ Where $K$ is the forward path gain. The root locus plot of the system is :

Discussion

5665.	7. Why substances are measured in gram in scientific laboratories
Answer» 7. Why substances are measured in gram in scientific laboratories

Discussion

5666.	Pick the incorrect statement about solar cells/panel.
Answer» Pick the incorrect statement about solar cells/panel.

Discussion

5667.	a small object of mass m , at the end of a light cord , is held horizontally at a distance r from a fixed support as shown . the object is then released . what is the tension in the cord when the object is at the lowest point of its swing ?
Answer» a small object of mass m , at the end of a light cord , is held horizontally at a distance r from a fixed support as shown . the object is then released . what is the tension in the cord when the object is at the lowest point of its swing ?

Discussion

5668.	A car travels (14)th of a circular path with radius r. Find the ratio of the distance to its displacement.
Answer» A car travels $(\frac{1}{4})^{t h}$ of a circular path with radius r. Find the ratio of the distance to its displacement.

Discussion

5669.	These are the two rooms of the house. Colour them. Based on this activity, complete the paragraphs -Disclaimer: Kindly refer the textbook for the image.This is my ___________.It has __________ window.The colour of my bed is __________.There are __________ pictures on the wall.Disclaimer: Kindly refer the textbook for the image.This is a __________.It has __________ in it. We watch __________ here.It has __________ curtains. It has __________ table.
Answer» These are the two rooms of the house. Colour them. Based on this activity, complete the paragraphs - Disclaimer: Kindly refer the textbook for the image. This is my ___________. It has __________ window. The colour of my bed is __________. There are __________ pictures on the wall. Disclaimer: Kindly refer the textbook for the image. This is a __________. It has __________ in it. We watch __________ here. It has __________ curtains. It has __________ table.

Discussion

5670.	What resistance must be connected in parallel to a 4 Ω resistance to make the effective resistance equal to 2.4 Ω?
Answer» What resistance must be connected in parallel to a $4 Ω$ resistance to make the effective resistance equal to $2.4 Ω$ ?

Discussion

5671.	An object thrown vertically up from the ground passes the height 5m twice in an interval of 10s.What is its time of flight?
Answer» An object thrown vertically up from the ground passes the height 5m twice in an interval of 10s.What is its time of flight?

Discussion

5672.	Assertion =if a unit north pole rotates around a current carrying wires then work has to be done. reason =magnetic field produced by a current is always non conservative in nature
Answer» Assertion =if a unit north pole rotates around a current carrying wires then work has to be done. reason =magnetic field produced by a current is always non conservative in nature

Discussion

5673.	where the image will form in a convex mirror if object is put on focus
Answer» where the image will form in a convex mirror if object is put on focus

Discussion

5674.	Two bodies have their moments of inertia I and 2I respectively about their axis of rotation.If their kinetic energies of rotation are equal their angular momenta will be in the rat
Answer» Two bodies have their moments of inertia I and 2I respectively about their axis of rotation.If their kinetic energies of rotation are equal their angular momenta will be in the rat

Discussion

5675.	Which of the following are Products of Fermentation?
Answer» Which of the following are Products of Fermentation?

Discussion

5676.	Rockets work on the principle of conservation of:
Answer» Rockets work on the principle of conservation of:

Discussion

5677.	22. An Ion with mass number 37 possesses 1 unit of negative charge if the iron contains 11.1% more neutrons then the electrons, find the symbol of the iron
Answer» 22. An Ion with mass number 37 possesses 1 unit of negative charge if the iron contains 11.1% more neutrons then the electrons, find the symbol of the iron

Discussion

5678.	Calculate the quantity of charge in coulombs required to reduce 16.2 g of p-benzoquinone if current efficiency i 75%
Answer» Calculate the quantity of charge in coulombs required to reduce 16.2 g of p-benzoquinone if current efficiency i 75%

Discussion

5679.	2 kg of ice at −20∘C is mixed with 5 kg of water at 20∘C in an insulating vessel having a negligible heat capacity. Calculate the final mass of water remaining in the container. It is given that the specific heats of water and ice are 1 kcal/kg per ∘C and 0.5 kcal/kg per ∘C while the latent heat of fusion of ice is 80 kcal/kg
Answer» $2 kg$ of ice at $- 20^{\circ} C$ is mixed with $5 kg$ of water at $20^{\circ} C$ in an insulating vessel having a negligible heat capacity. Calculate the final mass of water remaining in the container. It is given that the specific heats of water and ice are $1 kcal/kg$ per $^{\circ} C$ and $0.5 kcal/kg$ per $^{\circ} C$ while the latent heat of fusion of ice is $80 kcal/kg$

Discussion

5680.	42. A proton and an alpha particle start from rest in a uniform electric field then the ratio of tym of flights to travel same distance in the field is A. Root5 :root2 B.root3 :1 C. 2 :1 D. 1:root2
Answer» 42. A proton and an alpha particle start from rest in a uniform electric field then the ratio of tym of flights to travel same distance in the field is A. Root5 :root2 B.root3 :1 C. 2 :1 D. 1:root2

Discussion

5681.	Question 1 What is the audible range of the average human ear?
Answer» Question 1 What is the audible range of the average human ear?

Discussion

5682.	A spherical capacitor is made of two conducting spherical shells of radii p=5 cm and q=15 cm. The space between the shells is filled with a dielectric of dielectric constant K=10 upto a radius r=9 cm as shown in the figure. Calculate the capacitance (in pF). [Nearest integer value]
Answer» A spherical capacitor is made of two conducting spherical shells of radii $p = 5 cm$ and $q = 15 cm$ . The space between the shells is filled with a dielectric of dielectric constant $K = 10$ upto a radius $r = 9 cm$ as shown in the figure. Calculate the capacitance (in $pF$ ). [Nearest integer value]

Discussion

5683.	28. A ball is thrown vertically upwards with a velocity of 20 m/s from the top of a building. The height of the point from where the ball is thrown is 25 m above the ground. The time elapsed before the ball hits the ground is?
Answer» 28. A ball is thrown vertically upwards with a velocity of 20 m/s from the top of a building. The height of the point from where the ball is thrown is 25 m above the ground. The time elapsed before the ball hits the ground is?

Discussion

5684.	Light travels in ___________.
Answer» Light travels in ___________.

Discussion

5685.	39.How newtons third law applicable in universe and rocket
Answer» 39.How newtons third law applicable in universe and rocket

Discussion

5686.	The time periods T1 and T2 of two simple pendulums of length l1 = 1 m and l2= 4 m at a place is related by T1:T2=
Answer» The time periods $T_{1}$ and $T_{2}$ of two simple pendulums of length $l_{1}$ = 1 m and $l_{2}$ = 4 m at a place is related by $T_{1} : T_{2}$ =

Discussion

5687.	Simple experiments on magnetic levitation done at home
Answer» Simple experiments on magnetic levitation done at home

Discussion

5688.	Write any two examples of electromagnetic waves.
Answer» Write any two examples of electromagnetic waves.

Discussion

5689.	An atom absorbs 2 eV energy and is excited to next energy state. The wavelength of light absorbed is
Answer» An atom absorbs 2 eV energy and is excited to next energy state. The wavelength of light absorbed is

Discussion

5690.	A vertical glass tube closed at the bottom contains mercury to a height of 100 cm at 30 degree Celsius the height of mercury column at 50 degree Celsius at
Answer» A vertical glass tube closed at the bottom contains mercury to a height of 100 cm at 30 degree Celsius the height of mercury column at 50 degree Celsius at

Discussion

5691.	Two mirrors M1 and M2 are inclined at angle θ as shown. A ray of light which is parallel to M2 strikes M1 and then strikes mirror M2. After that it retraces its own path. Find θ.
Answer» Two mirrors $M_{1}$ and $M_{2}$ are inclined at angle $θ$ as shown. A ray of light which is parallel to $M_{2}$ strikes $M_{1}$ and then strikes mirror $M_{2}$ . After that it retraces its own path. Find $θ$ .

Discussion

5692.	a source of light S is located at a distance of 8cm from a plane mirror. the reflected ray S' is detected 2cm from the mirror at a vertical dislacement of 12cm. the point of reflection is at a distance of
Answer» a source of light S is located at a distance of 8cm from a plane mirror. the reflected ray S' is detected 2cm from the mirror at a vertical dislacement of 12cm. the point of reflection is at a distance of

Discussion

5693.	John was given a task of putting up a notice on the notice board of his school. The process involved pinning the notice paper onto the board which was made of wood. He used the following pin as shown in the figure below. If he was pressing the pin from the broad end, he did not feel any pain on his thumb but when he tried the same thing from the other end, he felt a sharp prickly pain on his thumb. Why did this happen?
Answer» John was given a task of putting up a notice on the notice board of his school. The process involved pinning the notice paper onto the board which was made of wood. He used the following pin as shown in the figure below. If he was pressing the pin from the broad end, he did not feel any pain on his thumb but when he tried the same thing from the other end, he felt a sharp prickly pain on his thumb. Why did this happen?

5693.

John was given a task of putting up a notice on the notice board of his school. The process involved pinning the notice paper onto the board which was made of wood. He used the following pin as shown in the figure below. If he was pressing the pin from the broad end, he did not feel any pain on his thumb but when he tried the same thing from the other end, he felt a sharp prickly pain on his thumb. Why did this happen?

Answer»

John was given a task of putting up a notice on the notice board of his school. The process involved pinning the notice paper onto the board which was made of wood. He used the following pin as shown in the figure below. If he was pressing the pin from the broad end, he did not feel any pain on his thumb but when he tried the same thing from the other end, he felt a sharp prickly pain on his thumb. Why did this happen?

Discussion

5694.	In the circuit shown in the figure, the value of Resistance X, when potential difference between the points B and D is zero will be
Answer» In the circuit shown in the figure, the value of Resistance X, when potential difference between the points B and D is zero will be

Discussion

5695.	During motion of a man from equator to pole of earth,its weight will(neglect the effect of change in the radius of earth) 1)Increase by 0.34% 2)Decrease by 0.34% 3Increase by 0.52% 4)Decrease by 0.52%
Answer» During motion of a man from equator to pole of earth,its weight will(neglect the effect of change in the radius of earth) 1)Increase by 0.34% 2)Decrease by 0.34% 3Increase by 0.52% 4)Decrease by 0.52%

Discussion

5696.	The figure shows four containers of olive oil. Rank them according to the pressure at depth h.
Answer» The figure shows four containers of olive oil. Rank them according to the pressure at depth h.

5696.

The figure shows four containers of olive oil. Rank them according to the pressure at depth h.

Answer»

The figure shows four containers of olive oil. Rank them according to the pressure at depth h.

Discussion

5697.	What is the weight of a block of mass 5 kg at the centre of the Earth? (g=9.8 m s−2)
Answer» What is the weight of a block of mass $5 k g$ at the centre of the Earth? $(g = 9.8 m s^{- 2}$ )

Discussion

5698.	A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.
Answer» A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.

Discussion

5699.	If at depth h ,acceleration due to gravity is decreased by 25 percent as compared to the surface of earth then at height h it will decrease by (in comparison with surface of earth)
Answer» If at depth h ,acceleration due to gravity is decreased by 25 percent as compared to the surface of earth then at height h it will decrease by (in comparison with surface of earth)

Discussion

5700.	Before we tackle a constant volume situation for an ideal gas let us think about an equivalent problem, where we keep the pressure constant, while volume is allowed to increase. If γ is the coefficient of volume expansion at a temperature T, which of the following is true?
Answer» Before we tackle a constant volume situation for an ideal gas let us think about an equivalent problem, where we keep the pressure constant, while volume is allowed to increase. If $γ$ is the coefficient of volume expansion at a temperature $T$ , which of the following is true?

Discussion

Explore topic-wise InterviewSolutions in .

from a height two balls are thrown with same speed upward and downward .they take t1 and t2 time to reach the ground if third ball is dropped from same height find time taken by it to reach the ground

It takes 5 years for light to reach the earth from A Star. Express the distance of Star from the earth in (a) Light year (b) km.

A battery of EMF 10 V, with internal resistance 1 Ω is being charged by a 120 V d.c. supply using a series resistance of 10 Ω. The terminal voltage of the battery isa)20 Vb)10 Vc)0d)30 V

The momentum of an object of mass 2 kg moving with a velocity of 9 m/s is _______ .

What is the magnitude and direction of the resultant of 4 coplanar forces as follows: F​​​​​​1 vector = 20 N Due East F​​​​​​2 vector = 40 N due West F​​​​​3 vector = 50√2 N due north west F​​​​​4 vector = 20√2 N due south west

What is point of mass?

Complete these sentences - Animals Actions A butterfly can fly. A myna ___________. ___________ can wriggle. An elephant _______________. _____________ can hop. You ______________.

a particle is moving with initial velocity u=i-j+k what should be its acceleration so that it remains moving in the same straight lin

103.A body is projected with speed V at some angle from the ground so that its horizontal range is two times the maximum height. Then maximum height is (g=10m/s2)

A particle moves along the circumference of a circle with radius 2 m. It completes 5 revolutions in 10 seconds. Calculate its speed.

Examples of inertia of motion

The current passing through a wire is 5A. If the resistance of the wire is 4Ώ, then what is the work done to move a charge of 4C across the wire if the potential difference is kept constant?

A sound travels from east to west, in which direction do the particles of air move?

The transfer function of a closed loop system is :T(s)=Ks2+(3−K)(s+1) Where K is the forward path gain. The root locus plot of the system is :

7. Why substances are measured in gram in scientific laboratories

Pick the incorrect statement about solar cells/panel.

a small object of mass m , at the end of a light cord , is held horizontally at a distance r from a fixed support as shown . the object is then released . what is the tension in the cord when the object is at the lowest point of its swing ?

A car travels (14)th of a circular path with radius r. Find the ratio of the distance to its displacement.

What resistance must be connected in parallel to a 4 Ω resistance to make the effective resistance equal to 2.4 Ω?

An object thrown vertically up from the ground passes the height 5m twice in an interval of 10s.What is its time of flight?

Assertion =if a unit north pole rotates around a current carrying wires then work has to be done. reason =magnetic field produced by a current is always non conservative in nature

where the image will form in a convex mirror if object is put on focus

Two bodies have their moments of inertia I and 2I respectively about their axis of rotation.If their kinetic energies of rotation are equal their angular momenta will be in the rat

Which of the following are Products of Fermentation?

Rockets work on the principle of conservation of:

22. An Ion with mass number 37 possesses 1 unit of negative charge if the iron contains 11.1% more neutrons then the electrons, find the symbol of the iron

Calculate the quantity of charge in coulombs required to reduce 16.2 g of p-benzoquinone if current efficiency i 75%

42. A proton and an alpha particle start from rest in a uniform electric field then the ratio of tym of flights to travel same distance in the field is A. Root5 :root2 B.root3 :1 C. 2 :1 D. 1:root2

Question 1 What is the audible range of the average human ear?

A spherical capacitor is made of two conducting spherical shells of radii p=5 cm and q=15 cm. The space between the shells is filled with a dielectric of dielectric constant K=10 upto a radius r=9 cm as shown in the figure. Calculate the capacitance (in pF). [Nearest integer value]

28. A ball is thrown vertically upwards with a velocity of 20 m/s from the top of a building. The height of the point from where the ball is thrown is 25 m above the ground. The time elapsed before the ball hits the ground is?

Light travels in ___________.

39.How newtons third law applicable in universe and rocket

The time periods T1 and T2 of two simple pendulums of length l1 = 1 m and l2= 4 m at a place is related by T1:T2=

Simple experiments on magnetic levitation done at home

Write any two examples of electromagnetic waves.

An atom absorbs 2 eV energy and is excited to next energy state. The wavelength of light absorbed is

A vertical glass tube closed at the bottom contains mercury to a height of 100 cm at 30 degree Celsius the height of mercury column at 50 degree Celsius at

Two mirrors M1 and M2 are inclined at angle θ as shown. A ray of light which is parallel to M2 strikes M1 and then strikes mirror M2. After that it retraces its own path. Find θ.

a source of light S is located at a distance of 8cm from a plane mirror. the reflected ray S' is detected 2cm from the mirror at a vertical dislacement of 12cm. the point of reflection is at a distance of

In the circuit shown in the figure, the value of Resistance X, when potential difference between the points B and D is zero will be

During motion of a man from equator to pole of earth,its weight will(neglect the effect of change in the radius of earth) 1)Increase by 0.34% 2)Decrease by 0.34% 3Increase by 0.52% 4)Decrease by 0.52%

The figure shows four containers of olive oil. Rank them according to the pressure at depth h.

What is the weight of a block of mass 5 kg at the centre of the Earth? (g=9.8 m s−2)

A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.

If at depth h ,acceleration due to gravity is decreased by 25 percent as compared to the surface of earth then at height h it will decrease by (in comparison with surface of earth)

Before we tackle a constant volume situation for an ideal gas let us think about an equivalent problem, where we keep the pressure constant, while volume is allowed to increase. If γ is the coefficient of volume expansion at a temperature T, which of the following is true?

What is the magnitude and direction of the resultant of 4 coplanar forces as follows: F1 vector = 20 N Due East F2 vector = 40 N due West F3 vector = 50√2 N due north west F4 vector = 20√2 N due south west

Complete these sentences - Animals Actions A butterfly can fly. A myna _____. _ can wriggle. An elephant _____. _ can hop. You ________.