13232 + Interview Questions in Physics Page 158 InterviewSolution

7851.	If a block returns to its original position after slight tilt then it is in state of
Answer» If a block returns to its original position after slight tilt then it is in state of

Discussion

7852.	Molarity of 98% by mass of H2SO4 whose density is 1.8 g/ml is?
Answer» Molarity of 98% by mass of H2SO4 whose density is 1.8 g/ml is?

Discussion

7853.	Two planets have radius in the ratio x:y and density in the ratio m:n. The acceleration due to gravity on the surface of the two planets will be in the ratio of
Answer» Two planets have radius in the ratio $x : y$ and density in the ratio $m : n .$ The acceleration due to gravity on the surface of the two planets will be in the ratio of

Discussion

7854.	A body is projected upwards with a velocity of 29.4 metre/second. Calculate:- 1) the maximum height attained 2) the time taken to reach the maximum height.(g=9.8m/s)
Answer» A body is projected upwards with a velocity of 29.4 metre/second. Calculate:- 1) the maximum height attained 2) the time taken to reach the maximum height.(g=9.8m/s)

7854.

A body is projected upwards with a velocity of 29.4 metre/second. Calculate:- 1) the maximum height attained 2) the time taken to reach the maximum height.(g=9.8m/s)

Answer»

A body is projected upwards with a velocity of 29.4 metre/second.

Calculate:-

1) the maximum height attained

2) the time taken to reach the maximum height.(g=9.8m/s)

Discussion

7855.	Mass * change in velocity = ___ * time interval. Fill in the blank:
Answer» Mass * change in velocity = ___ * time interval. Fill in the blank:

Discussion

7856.	speed of sound in hydrogen at NTP is 1270 m/s.then the speed in a mixture of hydrogen and oxygen in the ratio 4:1 by volume will b
Answer» speed of sound in hydrogen at NTP is 1270 m/s.then the speed in a mixture of hydrogen and oxygen in the ratio 4:1 by volume will b

Discussion

7857.	a train is moving with uniform acceleration. the two ends of the train pass through a point with velocity v1 and v2. with what velocity the middle point of the train should pass through the same point?
Answer» a train is moving with uniform acceleration. the two ends of the train pass through a point with velocity v1 and v2. with what velocity the middle point of the train should pass through the same point?

Discussion

7858.	A semicircular wire PQS of radius R is connected to a wire bent in the form of a sine curve to form a closedloop as shown in the figure. If the loop carries a current i and is placed in a uniform magnetic field B, thenthe total force acting on the sine curve is(1) 2BIR (downward)3) BIR (upward)(2) 2BIR (upward(4) Zero
Answer» A semicircular wire PQS of radius R is connected to a wire bent in the form of a sine curve to form a closedloop as shown in the figure. If the loop carries a current i and is placed in a uniform magnetic field B, thenthe total force acting on the sine curve is(1) 2BIR (downward)3) BIR (upward)(2) 2BIR (upward(4) Zero

Discussion

7859.	During uniformly accelerated motion, displacement of an object is proportional to _____ of time.
Answer» During uniformly accelerated motion, displacement of an object is proportional to _____ of time.

Discussion

7860.	A ball of mass 200g falls from a height of 5m. What is it's potential energy. When it reaches the ground
Answer» A ball of mass 200g falls from a height of 5m. What is it's potential energy. When it reaches the ground

Discussion

7861.	a car is movin with an acceleration 2m\s2 from rest find the distance travelled by the car in 10 nth second.
Answer» a car is movin with an acceleration 2m\s²from rest find the distance travelled by the car in 10 nth second.

Discussion

7862.	Show that if a ray of light is reflected successively from two mirrors inclined at an angle θ , the deviation of the ray does not depend upon the angle of incidence. [5 MARKS]
Answer» Show that if a ray of light is reflected successively from two mirrors inclined at an angle $θ$ , the deviation of the ray does not depend upon the angle of incidence. [5 MARKS]

Discussion

7863.	Show with an example that potential energy is dependent of path followed in raising an object to height' h'.
Answer» Show with an example that potential energy is dependent of path followed in raising an object to height' h'.

Discussion

7864.	From a dam water is pouringdown at the rate of 150kg/s on the blades of a turbine if a ball dropped from the same dam takes 2 \sqrt5 s to hit the turbine then the power delivered to the turbine is approximately equal to (a)15W (b)150kW (c)125 kW (d)15.5 k
Answer» From a dam water is pouringdown at the rate of 150kg/s on the blades of a turbine if a ball dropped from the same dam takes 2 \sqrt5 s to hit the turbine then the power delivered to the turbine is approximately equal to (a)15W (b)150kW (c)125 kW (d)15.5 k

Discussion

7865.	While deciding the unit for heat, which temperature interval is chosen? Why?
Answer» While deciding the unit for heat, which temperature interval is chosen? Why?

Discussion

7866.	An alpha-particle of mass m suffers 1-dimensionalelastic collision with a nucleus at rest of unknownmass. It is scattered directly backwards losing, 64%of its initial kinetic energy. The mass of the nucleusis:(1) 1.5 m (2) 3.5 m(3) 4 m (4) 2 m
Answer» An alpha-particle of mass m suffers 1-dimensional elastic collision with a nucleus at rest of unknown mass. It is scattered directly backwards losing, 64% of its initial kinetic energy. The mass of the nucleus is: (1) 1.5 m (2) 3.5 m (3) 4 m (4) 2 m

Discussion

7867.	Is uniform motion and uniform speed same?
Answer» Is uniform motion and uniform speed same?

Discussion

7868.	Can we hear (a) infrasonic waves (b) ulfrasonic waves ?
Answer» Can we hear (a) infrasonic waves (b) ulfrasonic waves ?

Discussion

7869.	Why ice floats on water?
Answer» Why ice floats on water?

Discussion

7870.	A particle is moving in circular motion with speed 2t^2 ,it's acceleration at t=1s if radius is 1m
Answer» A particle is moving in circular motion with speed 2t^2 ,it's acceleration at t=1s if radius is 1m

Discussion

7871.	The viscosity of which liquid is the maximum?
Answer» The viscosity of which liquid is the maximum?

Discussion

7872.	A force acts perpendicular to a given surface. What is the quantity 'force per unit area' known as?
Answer» A force acts perpendicular to a given surface. What is the quantity 'force per unit area' known as?

Discussion

7873.	In yellow bulbs there is filament.Then,what is their in white lights?
Answer» In yellow bulbs there is filament.Then,what is their in white lights?

Discussion

7874.	The mass of a basketball on the earth is taken as 60 kg. What will be the weight of that basketball on moon? Take acceleration due to gravity on earth to be 10 ms−2.
Answer» The mass of a basketball on the earth is taken as 60 kg. What will be the weight of that basketball on moon? Take acceleration due to gravity on earth to be $10 m s^{- 2}$ .

Discussion

7875.	48.Calculate the work done in raising a stone of mass 5 kg and specific gravity 3,lying at the bed of a lake through a height of 5 m.
Answer» 48.Calculate the work done in raising a stone of mass 5 kg and specific gravity 3,lying at the bed of a lake through a height of 5 m.

Discussion

7876.	A skydiver with mass of 60 kg is moving at a terminal speed of 40 m in 2 seconds. Rate of work done by gravity is _____. Take g=10 ms−2
Answer» A skydiver with mass of $60 k g$ is moving at a terminal speed of $40 m$ in $2 s e c o n d s$ . Rate of work done by gravity is _____. Take $g = 10 m s^{- 2}$

Discussion

7877.	33.A small hollow sphere having a small hole in it ,is immersed into water at a depth of 20cm before any water penetrates into it.If the surface tension of water is 73 dyne per cm,find the radius of the hole
Answer» 33.A small hollow sphere having a small hole in it ,is immersed into water at a depth of 20cm before any water penetrates into it.If the surface tension of water is 73 dyne per cm,find the radius of the hole

Discussion

7878.	If the first resonance length of a closed organ pipe for tuning fork of frequency 330 Hz is 25 cm, then the second resonance length will be approximately Options: a-100 cm b- 75 cm c- 50 cm d-35 cm
Answer» If the first resonance length of a closed organ pipe for tuning fork of frequency 330 Hz is 25 cm, then the second resonance length will be approximately Options: a-100 cm b- 75 cm c- 50 cm d-35 cm

Discussion

7879.	A horse pulls a wagon horizontally with a force of 360N at an angle of 60 degree with the horizontal at a speed of 10km/h. What is the power of horse??
Answer» A horse pulls a wagon horizontally with a force of 360N at an angle of 60 degree with the horizontal at a speed of 10km/h. What is the power of horse??

Discussion

7880.	Which law of motion defines force and which law give the measure of force
Answer» Which law of motion defines force and which law give the measure of force

Discussion

7881.	The correct relationship between force (F), mass (m) and acceleration (A) is
Answer» The correct relationship between force (F), mass (m) and acceleration (A) is

Discussion

7882.	Give one example each of a real and a virtual image.
Answer» Give one example each of a real and a virtual image.

Discussion

7883.	What do you understand by the term magnetic field lines ?
Answer» What do you understand by the term magnetic field lines ?

Discussion

7884.	The position of a chloride ion on a material can be determined to a maximum error of 1 μm. If the mass of the chloride ion is 5.86×10−26 kg, what will be the minimum error in its velocity measurement?(h=6.62×10−34 Js)
Answer» The position of a chloride ion on a material can be determined to a maximum error of $1 μ m$ . If the mass of the chloride ion is $5.86 \times 10^{- 26} kg$ , what will be the minimum error in its velocity measurement? $(h = 6.62 \times 10^{- 34} Js)$

Discussion

7885.	176 A bomb of mass 30 kg at rest explodes into two pieces of masses 18kg and 12kg. the velocity of18 kg mass is 6m/s. the kinetic energy of the other mass is
Answer» 176 A bomb of mass 30 kg at rest explodes into two pieces of masses 18kg and 12kg. the velocity of18 kg mass is 6m/s. the kinetic energy of the other mass is

Discussion

7886.	What is the symbol of the SI unit of solid angle?
Answer» What is the symbol of the SI unit of solid angle?

Discussion

7887.	A car travelling at a speed of 30km/his brought to rest in a distance of 8m by applying brakes. If the same car is moving at a speed of 60km/h then it can be brought to rest with same brakes in 1)64m 2)32m 3)16m 4)4m
Answer» A car travelling at a speed of 30km/his brought to rest in a distance of 8m by applying brakes. If the same car is moving at a speed of 60km/h then it can be brought to rest with same brakes in 1)64m 2)32m 3)16m 4)4m

Discussion

7888.	When supernova occur all the mass of star get concentrate at at very small point and if the star has very very large mass then after supernova it turn into Black hole. But at the time of big bang entire mass of the universe came into a small point and that is a very very huge mass then why at that time the explosion occur and the black hole wasn't created.?? Please answer my question. Thanks
Answer» When supernova occur all the mass of star get concentrate at at very small point and if the star has very very large mass then after supernova it turn into Black hole. But at the time of big bang entire mass of the universe came into a small point and that is a very very huge mass then why at that time the explosion occur and the black hole wasn't created.?? Please answer my question. Thanks

Discussion

7889.	What is physics equation? Is there any template for formulas? Where to apply which formula?
Answer» What is physics equation? Is there any template for formulas? Where to apply which formula?

Discussion

7890.	14.At t=0 a particle is moving with velocity 10m per second due east .At t =5 second it is moving with velocity 10 underroot 3 m per second due north .then find average acceleration in time interval 0 to 5 second?
Answer» 14.At t=0 a particle is moving with velocity 10m per second due east .At t =5 second it is moving with velocity 10 underroot 3 m per second due north .then find average acceleration in time interval 0 to 5 second?

Discussion

7891.	The value of the universal gravitational constant is .
Answer» The value of the universal gravitational constant is .

Discussion

7892.	(a) When we put our ear to a railway line, we can hear the sound of an approaching train even when the train is far off but its sound cannot be heard through the air. Why ? (b) How could you convince a small child that when you speak, it is not necessary for air to travel from your mouth to the ear of a listener ?
Answer» (a) When we put our ear to a railway line, we can hear the sound of an approaching train even when the train is far off but its sound cannot be heard through the air. Why ? (b) How could you convince a small child that when you speak, it is not necessary for air to travel from your mouth to the ear of a listener ?

7892.

(a) When we put our ear to a railway line, we can hear the sound of an approaching train even when the train is far off but its sound cannot be heard through the air. Why ? (b) How could you convince a small child that when you speak, it is not necessary for air to travel from your mouth to the ear of a listener ?

Answer»

(a) When we put our ear to a railway line, we can hear the sound of an approaching train even when the train is far off but its sound cannot be heard through the air. Why ?

(b) How could you convince a small child that when you speak, it is not necessary for air to travel from your mouth to the ear of a listener ?

Discussion

7893.	When we used derivation of motion in numericals
Answer» When we used derivation of motion in numericals

Discussion

7894.	a solid cylinder of mass 3kg is rolling on a horizontal surface with velocity 4m/s .it collides with a horizontal spring of force cons†an t 200.the max compression produced in the spring will b
Answer» a solid cylinder of mass 3kg is rolling on a horizontal surface with velocity 4m/s .it collides with a horizontal spring of force cons†an t 200.the max compression produced in the spring will b

Discussion

7895.	On sending an ultrasonic wave from a ship towards the bottom of a sea, the time interval between sending the wave and receiving it back is found to be 1.5 s. If the velocity of wave in sea water is 1400 m s−1, find the depth of sea.
Answer» On sending an ultrasonic wave from a ship towards the bottom of a sea, the time interval between sending the wave and receiving it back is found to be 1.5 s. If the velocity of wave in sea water is 1400 m $s^{- 1}$ , find the depth of sea.

Discussion

7896.	What is the common name of '1 kWh' of electrical energy ?
Answer» What is the common name of '1 kWh' of electrical energy ?

Discussion

7897.	It is given that both liquid A and liquid B exert the same amount of pressure. The density of liquid A is twice the density of liquid B. The height of the column of liquid B is 10 cm. Then what would be the height of the column of liquid A?
Answer» It is given that both liquid A and liquid B exert the same amount of pressure. The density of liquid A is twice the density of liquid B. The height of the column of liquid B is 10 cm. Then what would be the height of the column of liquid A?

7897.

It is given that both liquid A and liquid B exert the same amount of pressure. The density of liquid A is twice the density of liquid B. The height of the column of liquid B is 10 cm. Then what would be the height of the column of liquid A?

Answer»

It is given that both liquid A and liquid B exert the same amount of pressure. The density of liquid A is twice the density of liquid B. The height of the column of liquid B is 10 cm. Then what would be the height of the column of liquid A?

Discussion

7898.	If q=2t2+3, find current at t=2 s.
Answer» If $q = 2 t^{2} + 3$ , find current at $t = 2 s$ .

Discussion

7899.	A force of magnitude 25 N acting on a body of mass 2 kg increases its kinetic energy from 100 J to 200 J. The displacement of the body during this interval is ___ metres.
Answer» A force of magnitude 25 N acting on a body of mass 2 kg increases its kinetic energy from 100 J to 200 J. The displacement of the body during this interval is ___ metres.

Discussion

7900.	Question 13A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24Ω resistances, which may be used separately, in series, or in parallel. What are the currents in the three cases?
Answer» Question 13 A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of $24 Ω$ resistances, which may be used separately, in series, or in parallel. What are the currents in the three cases?

Discussion

Explore topic-wise InterviewSolutions in .

If a block returns to its original position after slight tilt then it is in state of

Molarity of 98% by mass of H2SO4 whose density is 1.8 g/ml is?

Two planets have radius in the ratio x:y and density in the ratio m:n. The acceleration due to gravity on the surface of the two planets will be in the ratio of

A body is projected upwards with a velocity of 29.4 metre/second. Calculate:- 1) the maximum height attained 2) the time taken to reach the maximum height.(g=9.8m/s)

Mass * change in velocity = ___ * time interval. Fill in the blank:

speed of sound in hydrogen at NTP is 1270 m/s.then the speed in a mixture of hydrogen and oxygen in the ratio 4:1 by volume will b

a train is moving with uniform acceleration. the two ends of the train pass through a point with velocity v1 and v2. with what velocity the middle point of the train should pass through the same point?

During uniformly accelerated motion, displacement of an object is proportional to _____ of time.

A ball of mass 200g falls from a height of 5m. What is it's potential energy. When it reaches the ground

a car is movin with an acceleration 2m\s2 from rest find the distance travelled by the car in 10 nth second.

Show that if a ray of light is reflected successively from two mirrors inclined at an angle θ , the deviation of the ray does not depend upon the angle of incidence. [5 MARKS]

Show with an example that potential energy is dependent of path followed in raising an object to height' h'. ​​​​​

From a dam water is pouringdown at the rate of 150kg/s on the blades of a turbine if a ball dropped from the same dam takes 2 \sqrt5 s to hit the turbine then the power delivered to the turbine is approximately equal to (a)15W (b)150kW (c)125 kW (d)15.5 k

While deciding the unit for heat, which temperature interval is chosen? Why?

An alpha-particle of mass m suffers 1-dimensionalelastic collision with a nucleus at rest of unknownmass. It is scattered directly backwards losing, 64%of its initial kinetic energy. The mass of the nucleusis:(1) 1.5 m (2) 3.5 m(3) 4 m (4) 2 m

Is uniform motion and uniform speed same?

Can we hear (a) infrasonic waves (b) ulfrasonic waves ?

Why ice floats on water?

A particle is moving in circular motion with speed 2t^2 ,it's acceleration at t=1s if radius is 1m

The viscosity of which liquid is the maximum?

A force acts perpendicular to a given surface. What is the quantity 'force per unit area' known as?

In yellow bulbs there is filament.Then,what is their in white lights?

The mass of a basketball on the earth is taken as 60 kg. What will be the weight of that basketball on moon? Take acceleration due to gravity on earth to be 10 ms−2.

48.Calculate the work done in raising a stone of mass 5 kg and specific gravity 3,lying at the bed of a lake through a height of 5 m.

A skydiver with mass of 60 kg is moving at a terminal speed of 40 m in 2 seconds. Rate of work done by gravity is _____. Take g=10 ms−2

33.A small hollow sphere having a small hole in it ,is immersed into water at a depth of 20cm before any water penetrates into it.If the surface tension of water is 73 dyne per cm,find the radius of the hole

If the first resonance length of a closed organ pipe for tuning fork of frequency 330 Hz is 25 cm, then the second resonance length will be approximately Options: a-100 cm b- 75 cm c- 50 cm d-35 cm

A horse pulls a wagon horizontally with a force of 360N at an angle of 60 degree with the horizontal at a speed of 10km/h. What is the power of horse??

Which law of motion defines force and which law give the measure of force

The correct relationship between force (F), mass (m) and acceleration (A) is

Give one example each of a real and a virtual image.

What do you understand by the term magnetic field lines ?

The position of a chloride ion on a material can be determined to a maximum error of 1 μm. If the mass of the chloride ion is 5.86×10−26 kg, what will be the minimum error in its velocity measurement?(h=6.62×10−34 Js)

176 A bomb of mass 30 kg at rest explodes into two pieces of masses 18kg and 12kg. the velocity of18 kg mass is 6m/s. the kinetic energy of the other mass is

What is the symbol of the SI unit of solid angle?

A car travelling at a speed of 30km/his brought to rest in a distance of 8m by applying brakes. If the same car is moving at a speed of 60km/h then it can be brought to rest with same brakes in 1)64m 2)32m 3)16m 4)4m

What is physics equation? Is there any template for formulas? Where to apply which formula?

14.At t=0 a particle is moving with velocity 10m per second due east .At t =5 second it is moving with velocity 10 underroot 3 m per second due north .then find average acceleration in time interval 0 to 5 second?

The value of the universal gravitational constant is .

When we used derivation of motion in numericals

a solid cylinder of mass 3kg is rolling on a horizontal surface with velocity 4m/s .it collides with a horizontal spring of force cons†an t 200.the max compression produced in the spring will b

On sending an ultrasonic wave from a ship towards the bottom of a sea, the time interval between sending the wave and receiving it back is found to be 1.5 s. If the velocity of wave in sea water is 1400 m s−1, find the depth of sea.

What is the common name of '1 kWh' of electrical energy ?

It is given that both liquid A and liquid B exert the same amount of pressure. The density of liquid A is twice the density of liquid B. The height of the column of liquid B is 10 cm. Then what would be the height of the column of liquid A?

If q=2t2+3, find current at t=2 s.

A force of magnitude 25 N acting on a body of mass 2 kg increases its kinetic energy from 100 J to 200 J. The displacement of the body during this interval is ___ metres.

Question 13A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24Ω resistances, which may be used separately, in series, or in parallel. What are the currents in the three cases?

Show with an example that potential energy is dependent of path followed in raising an object to height' h'.