9478 + Interview Questions in Physics Page 92 InterviewSolution

4551.	Two identical parallel plate capacitors are placed in series and connected to a constant voltage source V volts.If one of the capacitors is completely immersed in a liquid with dielectric constant K the potential difference between the plates of the other capacitor will change to?
Answer» Two identical parallel plate capacitors are placed in series and connected to a constant voltage source V volts.If one of the capacitors is completely immersed in a liquid with dielectric constant K the potential difference between the plates of the other capacitor will change to?

Discussion

4552.	What are planets? How many planets are there in the solar system?
Answer» What are planets? How many planets are there in the solar system?

Discussion

4553.	Give reasons for the following observation: The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close.
Answer» Give reasons for the following observation: The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close.

Discussion

4554.	Does water with the help of electrolyte conduct electricity or electrolyte with help of water conduct electricity
Answer» Does water with the help of electrolyte conduct electricity or electrolyte with help of water conduct electricity

Discussion

4555.	1 molar aq.sol^nis ____ conc.than 1m aq. sol^{n
Answer» 1 molar aq.sol^nis ____ conc.than 1m aq. sol^{n

Discussion

4556.	if body is acted upon by external unbalanced force then it will move with some acceleration but what will happen if the body is rigid ?
Answer» if body is acted upon by external unbalanced force then it will move with some acceleration but what will happen if the body is rigid ?

Discussion

4557.	Two astronauts are floating close to each other in space. Can they talk to each other without using any special device? Give reason.
Answer» Two astronauts are floating close to each other in space. Can they talk to each other without using any special device? Give reason.

Discussion

4558.	The planet nearest to the sun is ____.
Answer» The planet nearest to the sun is ____.

Discussion

4559.	Frictional force on a body can be zero when
Answer» Frictional force on a body can be zero when

Discussion

4560.	The relative density of silver is 10.8. The density of water is 1000 kg/m3. The density of silver is:
Answer» The relative density of silver is $10.8$ . The density of water is $1000 k g / m^{3}$ . The density of silver is:

Discussion

4561.	If block A of mass 5 kg is placed over block B of mass 5 kg .All surfaces are smooth .A force 10 N is applied on B horizontally .Find the acceleration of A?
Answer» If block A of mass 5 kg is placed over block B of mass 5 kg .All surfaces are smooth .A force 10 N is applied on B horizontally .Find the acceleration of A?

Discussion

4562.	Which of the following is/are matter?
Answer» Which of the following is/are matter?

Discussion

4563.	Taking into account, the rules of significant figures, what is the value of (436.32 g+0.301 g+227.2 g)?
Answer» Taking into account, the rules of significant figures, what is the value of $(436.32 g + 0.301 g + 227.2 g)$ ?

Discussion

4564.	E=5x^2 i, the potential difference between A(x= 0) m and B(x= 4 m), Va-Vb is
Answer» E=5x^2 i, the potential difference between A(x= 0) m and B(x= 4 m), Va-Vb is

Discussion

4565.	do mechanical waves lose energy as they travel through a medium? Why/why not?
Answer» do mechanical waves lose energy as they travel through a medium? Why/why not?

Discussion

4566.	If a charged plastic straw is brought near another uncharged plastic straw. what will happen?
Answer» If a charged plastic straw is brought near another uncharged plastic straw. what will happen?

Discussion

4567.	Which is the polluting waste generated by electroplating factories ?
Answer» Which is the polluting waste generated by electroplating factories ?

Discussion

4568.	A vessel contains a non linear triatomic gas .If 50%of gas dissociate into individual atoms then find new value of degree of freedom by ignoring the vibrational mode and any further dissociation.
Answer» A vessel contains a non linear triatomic gas .If 50%of gas dissociate into individual atoms then find new value of degree of freedom by ignoring the vibrational mode and any further dissociation.

Discussion

4569.	There are two kinds of charges. How do we know this?
Answer» There are two kinds of charges. How do we know this?

Discussion

4570.	Take a capacitor connected to a battery. Then we inserted a dielctric inbetween the plates of capacitor. How the force get affected between the plates from initial force?
Answer» Take a capacitor connected to a battery. Then we inserted a dielctric inbetween the plates of capacitor. How the force get affected between the plates from initial force?

Discussion

4571.	In a hydroelectric power plant, water falls at a rate of 1000 kg s−1 from a height of 100 m. Assuming that 50% of the energy of falling water is converted into electrical energy, calculate the power generated. (Take g=10 ms−2)
Answer» In a hydroelectric power plant, water falls at a rate of $1000 k g s^{- 1}$ from a height of $100 m$ . Assuming that 50% of the energy of falling water is converted into electrical energy, calculate the power generated. (Take $g = 10 m s^{- 2}$ )

Discussion

4572.	16. Fluid friction on an object(1) Is independent of the velocity of the object(2) Increases with the increase in the velocity of the object(3) Decreases with the increase in the velocity of the object(4) First increases and then decreases with the increase in the velocity of the object
Answer» 16. Fluid friction on an object(1) Is independent of the velocity of the object(2) Increases with the increase in the velocity of the object(3) Decreases with the increase in the velocity of the object(4) First increases and then decreases with the increase in the velocity of the object

Discussion

4573.	3.If distance between two short dipoles is increased by2%, force between them is changed by(1) + 4%(2) -8%(3) -6%(4) - 4%
Answer» 3. If distance between two short dipoles is increased by 2%, force between them is changed by (1) + 4% (2) -8% (3) -6% (4) - 4%

Discussion

4574.	The audible range of hearing for human being is:
Answer» The audible range of hearing for human being is:

Discussion

4575.	A particle of mass m1 is kept at x=0 and another particle of mass m2 at x=d. When a third particle is kept at x=d/3, it experiences no net gravitational force due to the two particles. Find m2/m1.
Answer» A particle of mass $m_{1}$ is kept at $x = 0$ and another particle of mass $m_{2}$ at $x = d$ . When a third particle is kept at $x = d / 3$ , it experiences no net gravitational force due to the two particles. Find $m_{2} / m_{1}$ .

Discussion

4576.	Gravitational force is acting between two animals in the jungle, why they are not attracted towards each other? [2 MARKS]
Answer» Gravitational force is acting between two animals in the jungle, why they are not attracted towards each other? [2 MARKS]

Discussion

4577.	Is there any flux associated with a coil due to its own magnetic field?
Answer» Is there any flux associated with a coil due to its own magnetic field?

Discussion

4578.	Consider the system of equationsx+y+z=42x+y+3z=6x+2y+pz=qIf the system of equations has no solution for p=p′ and has infinite solutions for q=q′, then the value of (p′)2+(q′)2 is
Answer» Consider the system of equations $x + y + z = 4$ $2 x + y + 3 z = 6$ $x + 2 y + p z = q$ If the system of equations has no solution for $p = p^{'}$ and has infinite solutions for $q = q^{'},$ then the value of $(p^{'})^{2} + (q^{'})^{2}$ is

Discussion

4579.	v = (8t 4 - 3t ½ ) m/s, find acceleration at the end of 3s.
Answer» v = (8t 4 - 3t ½ ) m/s, find acceleration at the end of 3s.

Discussion

4580.	Why is graphite not used to make wires, despite being a good conductor of electricity?
Answer» Why is graphite not used to make wires, despite being a good conductor of electricity?

Discussion

4581.	If f : R → R is defined by f(x) = 6 – (x – 9)3, then f–1(x) = ___________.
Answer» If f : R → R is defined by f(x) = 6 – (x – 9)³, then f^–1(x) = ___________.

Discussion

4582.	An electrically neutral atom must have:
Answer» An electrically neutral atom must have:

Discussion

4583.	55.Time period of a simple pendulum of length l is T1 and time period of a uniform rod of same length l is pivoted about one end and oscillating in a vertical plane is T2.Amplitude of oscillations in both cases is small.Then T1/T2 is a)1/sqrt3 b)1 c)sqrt4/sqrt3 d)sqrt3/sqrt2
Answer» 55.Time period of a simple pendulum of length l is T1 and time period of a uniform rod of same length l is pivoted about one end and oscillating in a vertical plane is T2.Amplitude of oscillations in both cases is small.Then T1/T2 is a)1/sqrt3 b)1 c)sqrt4/sqrt3 d)sqrt3/sqrt2

Discussion

4584.	How can we extract water that is trapped in aquifers?
Answer» How can we extract water that is trapped in aquifers?

Discussion

4585.	A charge Q_is distributed uniformly on a fixedring of radius a. A point charge q is placed onaxis at a distance 2a from the centre of ring.The force experienced by point charge at givenposition is
Answer» A charge Q_is distributed uniformly on a fixedring of radius a. A point charge q is placed onaxis at a distance 2a from the centre of ring.The force experienced by point charge at givenposition is

Discussion

4586.	Fill in the blanks. (a) The incident ray, the normal and the reflected ray are all in the same ………… . (b) Reflection from a rough surface is called ………… reflection. (c) In a periscope, we see ………… reflection of an object. (d) In a plane mirror, the image is ………… inverted.
Answer» Fill in the blanks. (a) The incident ray, the normal and the reflected ray are all in the same ………… . (b) Reflection from a rough surface is called ………… reflection. (c) In a periscope, we see ………… reflection of an object. (d) In a plane mirror, the image is ………… inverted.

4586.

Fill in the blanks. (a) The incident ray, the normal and the reflected ray are all in the same ………… . (b) Reflection from a rough surface is called ………… reflection. (c) In a periscope, we see ………… reflection of an object. (d) In a plane mirror, the image is ………… inverted.

Answer»

Fill in the blanks.

(a) The incident ray, the normal and the reflected ray are all in the same ………… .

(b) Reflection from a rough surface is called ………… reflection.

(c) In a periscope, we see ………… reflection of an object.

(d) In a plane mirror, the image is ………… inverted.

Discussion

4587.	What is the average velocity of a body that moves three complete rounds in a circular path of radius r in time T?
Answer» What is the average velocity of a body that moves three complete rounds in a circular path of radius r in time T?

Discussion

4588.	two pendulums have time period T and 5T/4 . they start SHM at same time from mean position. what will be phase difference between them when smaller pendulum has completed one oscillation ?
Answer» two pendulums have time period T and 5T/4 . they start SHM at same time from mean position. what will be phase difference between them when smaller pendulum has completed one oscillation ?

Discussion

4589.	Magnitude of electric field at ddistance ron the axial point ofa shortelectric dipolee of diploe moment p is
Answer» Magnitude of electric field at ddistance ron the axial point ofa shortelectric dipolee of diploe moment p is

Discussion

4590.	Find the value of angle x.
Answer» Find the value of angle $x$ .

4590.

Find the value of angle x.

Answer»

Find the value of angle $x$ .

Discussion

4591.	A block of weight 1 N rests on an inclined planeof inclination 0 with the horizontal. The coefficientof friction between the block and the inclined planeis u.The minimum force that has to be appliedparallel to the inclined plane to make the body justmove up the plane is
Answer» A block of weight 1 N rests on an inclined planeof inclination 0 with the horizontal. The coefficientof friction between the block and the inclined planeis u.The minimum force that has to be appliedparallel to the inclined plane to make the body justmove up the plane is

Discussion

4592.	Which of the following are units of volume?
Answer» Which of the following are units of volume?

Discussion

4593.	a source of sound S emitting waves of frequency 100Hz and an observer O are located at some distance from each other .the source is moving with a speed of 19.4m/s at angle of 60 degree with the source observer line as shown .the observer is at rest.the apparent frequency observed by the observer is(velocity of sound is 330m/s)1.97Hz2.100Hz3.103Hz4.106Hz
Answer» a source of sound S emitting waves of frequency 100Hz and an observer O are located at some distance from each other .the source is moving with a speed of 19.4m/s at angle of 60 degree with the source observer line as shown .the observer is at rest.the apparent frequency observed by the observer is (velocity of sound is 330m/s) 1.97Hz 2.100Hz 3.103Hz 4.106Hz

Discussion

4594.	Which of these has virtual focus?
Answer» Which of these has virtual focus?

Discussion

4595.	What is gravitational force?
Answer» What is gravitational force?

Discussion

4596.	Which of the two is a better conductor of electricity : drinking water (tap water) or sea water? Give reason for your answer.
Answer» Which of the two is a better conductor of electricity : drinking water (tap water) or sea water? Give reason for your answer.

Discussion

4597.	Why do school bags have broad shoulder straps?
Answer» Why do school bags have broad shoulder straps?

Discussion

4598.	For a hollow sphere why rate of cooling is radius independent
Answer» For a hollow sphere why rate of cooling is radius independent

Discussion

4599.	A block is kept on a inclined plane of inclination of length l The velocity of the particle at the end of inclined plane will be? (the coefficient of friction is ) ( Ques. refers to 8ques of MCaps- 16 medical)
Answer» A block is kept on a inclined plane of inclination of length l The velocity of the particle at the end of inclined plane will be? (the coefficient of friction is ) ( Ques. refers to 8ques of MCaps- 16 medical)

Discussion

4600.	THE BODY OF THE SUBMARINE IS THICK AND BUILT OF STRONG MATERIAL?
Answer» THE BODY OF THE SUBMARINE IS THICK AND BUILT OF STRONG MATERIAL?

Discussion

Explore topic-wise InterviewSolutions in .

Two identical parallel plate capacitors are placed in series and connected to a constant voltage source V volts.If one of the capacitors is completely immersed in a liquid with dielectric constant K the potential difference between the plates of the other capacitor will change to?

What are planets? How many planets are there in the solar system?

Give reasons for the following observation: The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close.

Does water with the help of electrolyte conduct electricity or electrolyte with help of water conduct electricity

1 molar aq.sol^nis ____ conc.than 1m aq. sol^{n

if body is acted upon by external unbalanced force then it will move with some acceleration but what will happen if the body is rigid ?

Two astronauts are floating close to each other in space. Can they talk to each other without using any special device? Give reason.

The planet nearest to the sun is ____.

Frictional force on a body can be zero when

The relative density of silver is 10.8. The density of water is 1000 kg/m3. The density of silver is:

If block A of mass 5 kg is placed over block B of mass 5 kg .All surfaces are smooth .A force 10 N is applied on B horizontally .Find the acceleration of A?

Which of the following is/are matter?

Taking into account, the rules of significant figures, what is the value of (436.32 g+0.301 g+227.2 g)?

E=5x^2 i, the potential difference between A(x= 0) m and B(x= 4 m), Va-Vb is

do mechanical waves lose energy as they travel through a medium? Why/why not?

If a charged plastic straw is brought near another uncharged plastic straw. what will happen?

Which is the polluting waste generated by electroplating factories ?

A vessel contains a non linear triatomic gas .If 50%of gas dissociate into individual atoms then find new value of degree of freedom by ignoring the vibrational mode and any further dissociation.

There are two kinds of charges. How do we know this?

Take a capacitor connected to a battery. Then we inserted a dielctric inbetween the plates of capacitor. How the force get affected between the plates from initial force?

In a hydroelectric power plant, water falls at a rate of 1000 kg s−1 from a height of 100 m. Assuming that 50% of the energy of falling water is converted into electrical energy, calculate the power generated. (Take g=10 ms−2)

16. Fluid friction on an object(1) Is independent of the velocity of the object(2) Increases with the increase in the velocity of the object(3) Decreases with the increase in the velocity of the object(4) First increases and then decreases with the increase in the velocity of the object

3.If distance between two short dipoles is increased by2%, force between them is changed by(1) + 4%(2) -8%(3) -6%(4) - 4%

The audible range of hearing for human being is:

A particle of mass m1 is kept at x=0 and another particle of mass m2 at x=d. When a third particle is kept at x=d/3, it experiences no net gravitational force due to the two particles. Find m2/m1.

Gravitational force is acting between two animals in the jungle, why they are not attracted towards each other? [2 MARKS]

Is there any flux associated with a coil due to its own magnetic field?

Consider the system of equationsx+y+z=42x+y+3z=6x+2y+pz=qIf the system of equations has no solution for p=p′ and has infinite solutions for q=q′, then the value of (p′)2+(q′)2 is

v = (8t 4 - 3t ½ ) m/s, find acceleration at the end of 3s.

Why is graphite not used to make wires, despite being a good conductor of electricity?

If f : R → R is defined by f(x) = 6 – (x – 9)3, then f–1(x) = ___________.

An electrically neutral atom must have:

55.Time period of a simple pendulum of length l is T1 and time period of a uniform rod of same length l is pivoted about one end and oscillating in a vertical plane is T2.Amplitude of oscillations in both cases is small.Then T1/T2 is a)1/sqrt3 b)1 c)sqrt4/sqrt3 d)sqrt3/sqrt2

How can we extract water that is trapped in aquifers?

A charge Q_is distributed uniformly on a fixedring of radius a. A point charge q is placed onaxis at a distance 2a from the centre of ring.The force experienced by point charge at givenposition is

What is the average velocity of a body that moves three complete rounds in a circular path of radius r in time T?

two pendulums have time period T and 5T/4 . they start SHM at same time from mean position. what will be phase difference between them when smaller pendulum has completed one oscillation ?

Magnitude of electric field at ddistance ron the axial point ofa shortelectric dipolee of diploe moment p is

Find the value of angle x.

A block of weight 1 N rests on an inclined planeof inclination 0 with the horizontal. The coefficientof friction between the block and the inclined planeis u.The minimum force that has to be appliedparallel to the inclined plane to make the body justmove up the plane is

Which of the following are units of volume?

Which of these has virtual focus?

What is gravitational force?

Which of the two is a better conductor of electricity : drinking water (tap water) or sea water? Give reason for your answer.

Why do school bags have broad shoulder straps?

For a hollow sphere why rate of cooling is radius independent

A block is kept on a inclined plane of inclination of length l The velocity of the particle at the end of inclined plane will be? (the coefficient of friction is ) ( Ques. refers to 8ques of MCaps- 16 medical)

THE BODY OF THE SUBMARINE IS THICK AND BUILT OF STRONG MATERIAL?