16569 + Interview Questions in Physics

1.	N_{2 }+ H_2 →2NH_3 In above reaction equivalent weight of NH_{3 }and H_2 i
Answer» N_{2 }+ H_2 →2NH_3 In above reaction equivalent weight of NH_{3 }and H_2 i

Discussion

2.	5.In group 1 and 2,on going downward there is large difference comes between period 1 and period 2.Therefore Li do diogonal relationship with magnesium and do not calcium.While calcium has similar properties with magnesium so why Li do not make diagonal relationship with Calcium ?
Answer» 5.In group 1 and 2,on going downward there is large difference comes between period 1 and period 2.Therefore Li do diogonal relationship with magnesium and do not calcium.While calcium has similar properties with magnesium so why Li do not make diagonal relationship with Calcium ?

Discussion

3.	Calculate the power output of 92U235 reactor, if it takes 30 days to use up 2 kg of fuel, and if each fission gives 185 MeV of useable energy.(Avogadro number=6×1023)
Answer» Calculate the power output of $_{92} U^{235}$ reactor, if it takes $30$ days to use up $2 kg$ of fuel, and if each fission gives $185 MeV$ of useable energy. $(Avogadro number = 6 \times 10^{23})$

Discussion

4.	What condition is necessary for the production of current by electromagnetic induction ?
Answer» What condition is necessary for the production of current by electromagnetic induction ?

Discussion

5.	The focal lengths of a lens are in the ratio 8:3 when it is immersed in two different liquids of refractive indices 1.6 and 1.2 respectively. The refractive index of the material of the lens is
Answer» The focal lengths of a lens are in the ratio $8 : 3$ when it is immersed in two different liquids of refractive indices $1.6$ and $1.2$ respectively. The refractive index of the material of the lens is

Discussion

6.	ntlength of potentiometer wire is l .acellemf E is balanced at a lengthl/3FROM POSITIVE END of wire.IF LENGTH OF WIRE INCREASED by l/2then what dist will same cellgive balanced point?n
Answer» ntlength of potentiometer wire is l .acellemf E is balanced at a lengthl/3FROM POSITIVE END of wire.IF LENGTH OF WIRE INCREASED by l/2then what dist will same cellgive balanced point?n

Discussion

7.	In ocean-thermal-energy conversion plants, vapors of a volatile liquid like __ are used to run the turbine of a generator.
Answer» In ocean-thermal-energy conversion plants, vapors of a volatile liquid like __ are used to run the turbine of a generator.

Discussion

8.	A logic circuit controls the passage of a signal according to the following requirements:1. Output X will equal to A when control input B and C are same2. X will remain high when B and C are different.The logic circuit will be
Answer» A logic circuit controls the passage of a signal according to the following requirements: 1. Output X will equal to A when control input B and C are same 2. X will remain high when B and C are different. The logic circuit will be

Discussion

9.	Consider the following statements: Statement 1: Laser pulse method is used to measure very long distances. Statement 2: The Light year is a unit to measure these long distances.
Answer» Consider the following statements: Statement 1: Laser pulse method is used to measure very long distances. Statement 2: The Light year is a unit to measure these long distances.

9.

Consider the following statements: Statement 1: Laser pulse method is used to measure very long distances. Statement 2: The Light year is a unit to measure these long distances.

Answer»

Consider the following statements:

Statement 1: Laser pulse method is used to measure very long distances.

Statement 2: The Light year is a unit to measure these long distances.

Discussion

10.	When resistors R1 and R2 are connected in series across a battery of potential difference V, the power dissipated by the resistors are P1 and P2 respectively. When they are connected in parallel across a battery of potential difference E, the power dissipated is P3 and P4 respectively. Which one of the following is true?
Answer» When resistors $R_{1} a n d R_{2}$ are connected in series across a battery of potential difference V, the power dissipated by the resistors are $P_{1} a n d P_{2}$ respectively. When they are connected in parallel across a battery of potential difference E, the power dissipated is $P_{3} a n d P_{4}$ respectively. Which one of the following is true?

Discussion

11.	What is the function of optic nerve in human eye?
Answer» What is the function of optic nerve in human eye?

Discussion

12.	Find the current through the 10 Ω resistor shown in figure.
Answer» Find the current through the $10 Ω$ resistor shown in figure.

Discussion

13.	How does a solenoid behave like a magnet? Can you determine the north and south poles of a current carrying solenoid with the help of a bar magnet?
Answer» How does a solenoid behave like a magnet? Can you determine the north and south poles of a current carrying solenoid with the help of a bar magnet?

Discussion

14.	A fillet - welded joint is shown in the figure. The size of the weld is 8 mm safe stress in the weld is 120 N/mm2 . The safe force to which the weld can be subjected will be kN.147.84
Answer» A fillet - welded joint is shown in the figure. The size of the weld is 8 mm safe stress in the weld is $120 N / m m^{2}$ . The safe force to which the weld can be subjected will be kN. 147.84

14.

A fillet - welded joint is shown in the figure. The size of the weld is 8 mm safe stress in the weld is 120 N/mm2 . The safe force to which the weld can be subjected will be kN.147.84

Answer»

A fillet - welded joint is shown in the figure. The size of the weld is 8 mm safe stress in the weld is $120 N / m m^{2}$ . The safe force to which the weld can be subjected will be kN.

147.84

Discussion

15.	A string tied on a roof can bear a maximum tension of 50 kg weight.the minimum acceleration that can be required by a man of 98 kg to decide will be (take g=9.8). Assume that there is no friction between the rope and the man that is all surfaces are frictionless.
Answer» A string tied on a roof can bear a maximum tension of 50 kg weight.the minimum acceleration that can be required by a man of 98 kg to decide will be (take g=9.8). Assume that there is no friction between the rope and the man that is all surfaces are frictionless.

Discussion

16.	Total mechanical energy E of an object of mass m, at a height h above the ground is given bythe relation22mFind the dimensions of p. (g acceleration due to gravity).
Answer» Total mechanical energy E of an object of mass m, at a height h above the ground is given bythe relation22mFind the dimensions of p. (g acceleration due to gravity).

Discussion

17.	A person wants a real image of his own , 3 times enlarged. Where should he stand infront of a con cave mirror of radius of curvature 30 cm?
Answer» A person wants a real image of his own , 3 times enlarged. Where should he stand infront of a con cave mirror of radius of curvature 30 cm?

Discussion

18.	Total distance covered by light in one year is
Answer» Total distance covered by light in one year is

Discussion

19.	(34. A particle moves under an attractive force F=-k/r2in a circle of radius r. The total energyof revolving particle is(1)-k/r(2)k/r(3)-k/2r4)kr
Answer» (34. A particle moves under an attractive force F=-k/r2in a circle of radius r. The total energyof revolving particle is(1)-k/r(2)k/r(3)-k/2r4)kr

Discussion

20.	ntA fully charged capacitor C with initial charge qo is connected to a coil of self inductance L at t=0. The time at which the energy is stored equally between the electric and the magnetic fields is?n
Answer» ntA fully charged capacitor C with initial charge qo is connected to a coil of self inductance L at t=0. The time at which the energy is stored equally between the electric and the magnetic fields is?n

Discussion

21.	Find the refractive index of glass with respect to water.The refractive index of glass with respect to air is 32 and the refractive index of water with respect to air is 43 respectively.
Answer» Find the refractive index of glass with respect to water. The refractive index of glass with respect to air is $\frac{3}{2}$ and the refractive index of water with respect to air is $\frac{4}{3}$ respectively.

Discussion

22.

Rewrite the following table so as to match second and third column with first column Column Column II Column III (1) Myopia Old age problem Convex lens (2) Hypermetropia Near-sightedness Bifocal lens (3) Presbyopia Long sightedness Concave lens

Answer»

Rewrite the following table so as to match second and third column with first column

Column		Column II	Column III
(1)	Myopia	Old age problem	Convex lens
(2)	Hypermetropia	Near-sightedness	Bifocal lens
(3)	Presbyopia	Long sightedness	Concave lens

Discussion

23.	(i) "The refractive index of diamond is 2.42”. What is the meaning of this statement? (iii) Name a liquid whose mass density is less than that of water but it is optically denser than water.
Answer» (i) "The refractive index of diamond is 2.42”. What is the meaning of this statement? (iii) Name a liquid whose mass density is less than that of water but it is optically denser than water.

Discussion

24.	If the light emitted by bulbs is white, then how does blue light bulbs or orange light bulbs emit their colours respectively ?
Answer» If the light emitted by bulbs is white, then how does blue light bulbs or orange light bulbs emit their colours respectively ?

Discussion

25.	The voltage of domestic ac is 220V. what does it represent?Mean voltage peak voltage root mean voltage root mean square voltage EXPLAIN in details
Answer» The voltage of domestic ac is 220V. what does it represent? Mean voltage peak voltage root mean voltage root mean square voltage EXPLAIN in details

Discussion

26.	How is critical angle related to the refractive index of the medium?
Answer» How is critical angle related to the refractive index of the medium?

Discussion

27.	What will be the electro motive force for following cell at 298 K Zn(s)\vert Zn+2(0.2 M)\vert\vert Fe+3(0.001 M)\vert Fe(s) if Image not present = –0.036 and Image not present = –0.76 V. (1) 0.763 V (2) 0.685 V (3) –0.685 V (4) –0.763 V
Answer» What will be the electro motive force for following cell at 298 K Zn(s)\vert Zn+2(0.2 M)\vert\vert Fe+3(0.001 M)\vert Fe(s) if Image not present = –0.036 and Image not present = –0.76 V. (1) 0.763 V (2) 0.685 V (3) –0.685 V (4) –0.763 V

Discussion

28.	22320 cal of heat is supplied to 100g of ice at 0^° C. If thelatent heat of fusion of ice is 80 cal gand latent heat ofvaporization of water is 540 cal g-1the final amount ofwater thus obtained and its temperature respectively are
Answer» 22320 cal of heat is supplied to 100g of ice at 0^° C. If thelatent heat of fusion of ice is 80 cal gand latent heat ofvaporization of water is 540 cal g-1the final amount ofwater thus obtained and its temperature respectively are

Discussion

29.	ntif a wire is streachedso lengthis 20% morethan its initial length, the%increase in resistence of wireis?n
Answer» ntif a wire is streachedso lengthis 20% morethan its initial length, the%increase in resistence of wireis?n

Discussion

30.	While determining the focal length of a concave mirror, a student obtained the image of a distant object on a screen. In order to get the focal length of the mirror, the student should measure the distance:(1) between the object and the mirror only(2) between the screen and the mirror only(3) between the object and the screen only(4) between the screen and mirror as well as between the screen and the object
Answer» While determining the focal length of a concave mirror, a student obtained the image of a distant object on a screen. In order to get the focal length of the mirror, the student should measure the distance: (1) between the object and the mirror only (2) between the screen and the mirror only (3) between the object and the screen only (4) between the screen and mirror as well as between the screen and the object

Discussion

31.	The dark fibrous material created when the decomposition of dead plants and trees fail to keep pace with the production of organic matter is known as:
Answer» The dark fibrous material created when the decomposition of dead plants and trees fail to keep pace with the production of organic matter is known as:

Discussion

32.	(a) In what respect does the construction of an A.C. generator differ from that of a D.C. generator ? (b) What normally drives the alternators in a Thermal Power Station ? What fuels can be used to heat water in the boiler ?
Answer» (a) In what respect does the construction of an A.C. generator differ from that of a D.C. generator ? (b) What normally drives the alternators in a Thermal Power Station ? What fuels can be used to heat water in the boiler ?

32.

(a) In what respect does the construction of an A.C. generator differ from that of a D.C. generator ? (b) What normally drives the alternators in a Thermal Power Station ? What fuels can be used to heat water in the boiler ?

Answer»

(a) In what respect does the construction of an A.C. generator differ from that of a D.C. generator ?

(b) What normally drives the alternators in a Thermal Power Station ? What fuels can be used to heat water in the boiler ?

Discussion

33.	Suppose a ball of mass m is thrown vertically upward with an initial speed, v its speed decreases continuously till it becomes zero. Thereafter, the ball begins to fall downward and attains the speed vagain before striking the ground. It implies that the magnitude of initial and final momentum of the ball is same. Yet, it is not an example of conservation of momentum. Explain why?
Answer» Suppose a ball of mass m is thrown vertically upward with an initial speed, v its speed decreases continuously till it becomes zero. Thereafter, the ball begins to fall downward and attains the speed vagain before striking the ground. It implies that the magnitude of initial and final momentum of the ball is same. Yet, it is not an example of conservation of momentum. Explain why?

Discussion

34.	A person is standing in an elevato.r In which situation he finds his weight less?
Answer» A person is standing in an elevato.r In which situation he finds his weight less?

Discussion

35.	A solenoid of length 50 CM. Having 100 turns carries a current of 2.5 A. Find the magnetic field in the interior of the solenoid.
Answer» A solenoid of length 50 CM. Having 100 turns carries a current of 2.5 A. Find the magnetic field in the interior of the solenoid.

Discussion

36.	Define 1 volt.
Answer» Define 1 volt.

Discussion

37.	A man grows into a giant such that his linear dimensions increase by factor 9.Assuming his density remains same,stress in the leg will change by the factor of?
Answer» A man grows into a giant such that his linear dimensions increase by factor 9.Assuming his density remains same,stress in the leg will change by the factor of?

Discussion

38.	A 2 ohm resistor is connected in series with an R ohm resistor.This combination is connected across a cell.When the potential difference across 2 ohm resistor is balanced on a potentiometer wire,null point is obtained at a length of 300 cm.When the same procedure is repeated for R ohm resistor,null point is obtained at a length of 350 cm Value of R i
Answer» A 2 ohm resistor is connected in series with an R ohm resistor.This combination is connected across a cell.When the potential difference across 2 ohm resistor is balanced on a potentiometer wire,null point is obtained at a length of 300 cm.When the same procedure is repeated for R ohm resistor,null point is obtained at a length of 350 cm Value of R i

Discussion

39.	explain in detail the various health hazards of modernization.
Answer» explain in detail the various health hazards of modernization.

Discussion

40.	Why we will use concave lens for myopia? Why not convex lens?
Answer» Why we will use concave lens for myopia? Why not convex lens?

Discussion

41.	what is momentu
Answer» what is momentu

Discussion

42.	Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.
Answer» Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.

Discussion

43.	a particle is moving in a circle with uniform speed (v) . In moving from one point to another point diametrically opposite, the ratio of magnitude of change in velocity to change in magnitude of velocity is
Answer» a particle is moving in a circle with uniform speed (v) . In moving from one point to another point diametrically opposite, the ratio of magnitude of change in velocity to change in magnitude of velocity is

Discussion

44.	current has direction still it is a scaler quantity. why
Answer» current has direction still it is a scaler quantity. why

Discussion

45.	{ 10. The heat of formation of }CO_2 is }-407kJ/mol . The }} energy required for the process }{3CO_2(g)→3C(g)+2O_3(g) is }}{ (1) Less than }1221kJ}{ (2) More than }1221kJ}{ (3) Is equal to }1221kJ} (4) Cannot be predicted
Answer» { 10. The heat of formation of }CO_2 is }-407kJ/mol . The }} energy required for the process }{3CO_2(g)→3C(g)+2O_3(g) is }}{ (1) Less than }1221kJ}{ (2) More than }1221kJ}{ (3) Is equal to }1221kJ} (4) Cannot be predicted

Discussion

46.	13. A particle of mass m moves with constant speed v in a circle path of radius r as shown in figure. The average force on it during its motion from A to B is
Answer» 13. A particle of mass m moves with constant speed v in a circle path of radius r as shown in figure. The average force on it during its motion from A to B is

Discussion

47.	Why does a voltmeter have high resistance. Explain
Answer» Why does a voltmeter have high resistance. Explain

Discussion

48.	6.What should be the resistance R1,R2,R3 of the rheostat sections for the current through the ammeter A of resistance of 30 ohm to increase by one ampere as the rheostat arm is moved from Shud 1to shud 2 to shud 3 and shud 4. The circuit is connected to a source of emf 120V and internal resistance is zero ohm. Find value of R1,R2,R3.
Answer» 6.What should be the resistance R1,R2,R3 of the rheostat sections for the current through the ammeter A of resistance of 30 ohm to increase by one ampere as the rheostat arm is moved from Shud 1to shud 2 to shud 3 and shud 4. The circuit is connected to a source of emf 120V and internal resistance is zero ohm. Find value of R1,R2,R3.

Discussion

49.	A 5 V battery and a 2 V battery are connected to the resistances as shown. The current in the 10 Ω resistor is :
Answer» A $5 V$ battery and a $2 V$ battery are connected to the resistances as shown. The current in the $10 Ω$ resistor is :

Discussion

50.

State the condition for each of the following : (a) a lens has both its focal lengths equal. (b) a ray passes undeviated through the lens.

Answer»

State the condition for each of the following :

(a) a lens has both its focal lengths equal.

(b) a ray passes undeviated through the lens.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

N_{2 }+ H_2 →2NH_3 In above reaction equivalent weight of NH_{3 }and H_2 i

5.In group 1 and 2,on going downward there is large difference comes between period 1 and period 2.Therefore Li do diogonal relationship with magnesium and do not calcium.While calcium has similar properties with magnesium so why Li do not make diagonal relationship with Calcium ?

Calculate the power output of 92U235 reactor, if it takes 30 days to use up 2 kg of fuel, and if each fission gives 185 MeV of useable energy.(Avogadro number=6×1023)

What condition is necessary for the production of current by electromagnetic induction ?

The focal lengths of a lens are in the ratio 8:3 when it is immersed in two different liquids of refractive indices 1.6 and 1.2 respectively. The refractive index of the material of the lens is

ntlength of potentiometer wire is l .acellemf E is balanced at a lengthl/3FROM POSITIVE END of wire.IF LENGTH OF WIRE INCREASED by l/2then what dist will same cellgive balanced point?n

In ocean-thermal-energy conversion plants, vapors of a volatile liquid like __ are used to run the turbine of a generator.

A logic circuit controls the passage of a signal according to the following requirements:1. Output X will equal to A when control input B and C are same2. X will remain high when B and C are different.The logic circuit will be

Consider the following statements: Statement 1: Laser pulse method is used to measure very long distances. Statement 2: The Light year is a unit to measure these long distances.

What is the function of optic nerve in human eye?

Find the current through the 10 Ω resistor shown in figure.

How does a solenoid behave like a magnet? Can you determine the north and south poles of a current carrying solenoid with the help of a bar magnet?

A fillet - welded joint is shown in the figure. The size of the weld is 8 mm safe stress in the weld is 120 N/mm2 . The safe force to which the weld can be subjected will be kN.147.84

A string tied on a roof can bear a maximum tension of 50 kg weight.the minimum acceleration that can be required by a man of 98 kg to decide will be (take g=9.8). Assume that there is no friction between the rope and the man that is all surfaces are frictionless.

Total mechanical energy E of an object of mass m, at a height h above the ground is given bythe relation22mFind the dimensions of p. (g acceleration due to gravity).

A person wants a real image of his own , 3 times enlarged. Where should he stand infront of a con cave mirror of radius of curvature 30 cm?

Total distance covered by light in one year is

(34. A particle moves under an attractive force F=-k/r2in a circle of radius r. The total energyof revolving particle is(1)-k/r(2)k/r(3)-k/2r4)kr

ntA fully charged capacitor C with initial charge qo is connected to a coil of self inductance L at t=0. The time at which the energy is stored equally between the electric and the magnetic fields is?n

Find the refractive index of glass with respect to water.The refractive index of glass with respect to air is 32 and the refractive index of water with respect to air is 43 respectively.

Rewrite the following table so as to match second and third column with first column Column Column II Column III (1) Myopia Old age problem Convex lens (2) Hypermetropia Near-sightedness Bifocal lens (3) Presbyopia Long sightedness Concave lens

(i) "The refractive index of diamond is 2.42”. What is the meaning of this statement? (iii) Name a liquid whose mass density is less than that of water but it is optically denser than water.

If the light emitted by bulbs is white, then how does blue light bulbs or orange light bulbs emit their colours respectively ?

The voltage of domestic ac is 220V. what does it represent?Mean voltage peak voltage root mean voltage root mean square voltage EXPLAIN in details

How is critical angle related to the refractive index of the medium?

What will be the electro motive force for following cell at 298 K Zn(s)\vert Zn+2(0.2 M)\vert\vert Fe+3(0.001 M)\vert Fe(s) if Image not present = –0.036 and Image not present = –0.76 V. (1) 0.763 V (2) 0.685 V (3) –0.685 V (4) –0.763 V

22320 cal of heat is supplied to 100g of ice at 0^° C. If thelatent heat of fusion of ice is 80 cal gand latent heat ofvaporization of water is 540 cal g-1the final amount ofwater thus obtained and its temperature respectively are

ntif a wire is streachedso lengthis 20% morethan its initial length, the%increase in resistence of wireis?n

The dark fibrous material created when the decomposition of dead plants and trees fail to keep pace with the production of organic matter is known as:

(a) In what respect does the construction of an A.C. generator differ from that of a D.C. generator ? (b) What normally drives the alternators in a Thermal Power Station ? What fuels can be used to heat water in the boiler ?

A person is standing in an elevato.r In which situation he finds his weight less?

A solenoid of length 50 CM. Having 100 turns carries a current of 2.5 A. Find the magnetic field in the interior of the solenoid.

Define 1 volt.

A man grows into a giant such that his linear dimensions increase by factor 9.Assuming his density remains same,stress in the leg will change by the factor of?

explain in detail the various health hazards of modernization.

Why we will use concave lens for myopia? Why not convex lens?

what is momentu

Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.

a particle is moving in a circle with uniform speed (v) . In moving from one point to another point diametrically opposite, the ratio of magnitude of change in velocity to change in magnitude of velocity is

current has direction still it is a scaler quantity. why

{ 10. The heat of formation of }CO_2 is }-407kJ/mol . The }} energy required for the process }{3CO_2(g)→3C(g)+2O_3(g) is }}{ (1) Less than }1221kJ}{ (2) More than }1221kJ}{ (3) Is equal to }1221kJ} (4) Cannot be predicted

13. A particle of mass m moves with constant speed v in a circle path of radius r as shown in figure. The average force on it during its motion from A to B is

Why does a voltmeter have high resistance. Explain

A 5 V battery and a 2 V battery are connected to the resistances as shown. The current in the 10 Ω resistor is :

State the condition for each of the following : (a) a lens has both its focal lengths equal. (b) a ray passes undeviated through the lens.