16569 + Interview Questions in Physics

1.	With regard to the principle of working of an ecg, does the electrocardiograph measure change in potential or change in electric current?
Answer» With regard to the principle of working of an ecg, does the electrocardiograph measure change in potential or change in electric current?

Discussion

2.	An eye specialist prescribes spectacles having a combination of a convex lens of focal length 40 cm in contact with a concave lens of focal length 25 cm. The power of this lens combination in Dioptre is:
Answer» An eye specialist prescribes spectacles having a combination of a convex lens of focal length $40 cm$ in contact with a concave lens of focal length $25 cm$ . The power of this lens combination in Dioptre is:

Discussion

3.	Give three characteristics of a series circuit. [3 MARKS]
Answer» Give three characteristics of a series circuit. [3 MARKS]

Discussion

4.	Question 6Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilization?(a) Nuclear energy(b) Thermal energy(c) Solar energy(d) Geothermal energy
Answer» Question 6 Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilization? (a) Nuclear energy (b) Thermal energy (c) Solar energy (d) Geothermal energy

Discussion

5.	Two conductors A and B of have their lengths in ratio 4:3, area of cross-section in ratio 1:2 and their resistivities in ratio 2:3 . What will be ratio of their resistances ?
Answer» Two conductors A and B of have their lengths in ratio 4:3, area of cross-section in ratio 1:2 and their resistivities in ratio 2:3 . What will be ratio of their resistances ?

Discussion

6.	What is the reason for the apparent flattening of the sun’s disc at sunset and sunrise?
Answer» What is the reason for the apparent flattening of the sun’s disc at sunset and sunrise?

Discussion

7.	A fan of power 550 W works for 3 hours. Calculate the energy consumed.
Answer» A fan of power $550 W$ works for $3 h o u r s$ . Calculate the energy consumed.

Discussion

8.	11.calculate terminal velocity of an oil drop falling freely in air.the radius of drop is 0.01mm and density of oil is 1.1×10 raise to power 3kg/m cube. eta is given:1.8×10raise to -5
Answer» 11.calculate terminal velocity of an oil drop falling freely in air.the radius of drop is 0.01mm and density of oil is 1.1×10 raise to power 3kg/m cube. eta is given:1.8×10raise to -5

Discussion

9.	What are the functions of haversian canal and volkmann canal and why these are not present in spongy bone?
Answer» What are the functions of haversian canal and volkmann canal and why these are not present in spongy bone?

Discussion

10.	can the resistance of wire change if we add more cells in the wire
Answer» can the resistance of wire change if we add more cells in the wire

Discussion

11.	If 100 J of work has to be done in moving an electric charge of 4 C from a place where potential is -5 V to another place, where potential is V volt. The value of V is
Answer» If 100 J of work has to be done in moving an electric charge of 4 C from a place where potential is -5 V to another place, where potential is V volt. The value of V is

Discussion

12.	lonisation potential of hydrogen atom is 13.6 eV. Hydrogen atom in the ground state are excited by monochromatic light of energy 12.1 eV. The number of spectral lines emitted by hydrogen according to Bohr's theory will be(1)TWO(2)FOUR(3)ONE(4)THREE
Answer» lonisation potential of hydrogen atom is 13.6 eV. Hydrogen atom in the ground state are excited by monochromatic light of energy 12.1 eV. The number of spectral lines emitted by hydrogen according to Bohr's theory will be (1)TWO (2)FOUR (3)ONE (4)THREE

Discussion

13.	The minimum power of eye lens is 40D .if the far point of normal eye is infinity ,find the size of the eyeball
Answer» The minimum power of eye lens is 40D .if the far point of normal eye is infinity ,find the size of the eyeball

Discussion

14.	What is resistance? What are different types of combination of resistors ? Why is the current flowing across all the resistors connected in series is same ?
Answer» What is resistance? What are different types of combination of resistors ? Why is the current flowing across all the resistors connected in series is same ?

Discussion

15.	200 g of ice at 0∘C converts into the water at 0∘C in 1 minute when heat is supplied to it at a constant rate. In how much time 200 g of water at 0∘C will change to 20∘C? Specific latent heat of ice = 336 Jg−1.
Answer» 200 g of ice at 0 $^{\circ} C$ converts into the water at 0 $^{\circ} C$ in 1 minute when heat is supplied to it at a constant rate. In how much time 200 g of water at 0 $^{\circ} C$ will change to 20 $^{\circ} C$ ? Specific latent heat of ice = 336 Jg $^{- 1}$ .

Discussion

16.	Select the correct relations between the velocity (v) of sound in a medium with the density (ρ) and the temperature of the gaseous medium.
Answer» Select the correct relations between the velocity (v) of sound in a medium with the density (ρ) and the temperature of the gaseous medium.

Discussion

17.	Show how you would connect three bulbs, each of resistance 6 Ω, so that the combination has a resistance of(i) 9 Ω(ii) 4 Ω
Answer» Show how you would connect three bulbs, each of resistance 6 $Ω$ , so that the combination has a resistance of (i) 9 $Ω$ (ii) 4 $Ω$

Discussion

18.	If a coil of 50 turns area 5.0 cm2 is suddenly removed from magnetic field. It is observed that charge of 5 × 10–4 C flows into the coil. If the resistance of the coil is 100 the magnetic flux density in Wb/m2 is(A) 1 (B) 3( C) 2( D) 4
Answer» If a coil of 50 turns area 5.0 cm2 is suddenly removed from magnetic field. It is observed that charge of 5 × 10–4 C flows into the coil. If the resistance of the coil is 100 the magnetic flux density in Wb/m2 is (A) 1 (B) 3( C) 2( D) 4

Discussion

19.	Fill in the blanks and Explain the completed sentences.a . Refractive index depends on the ............. of light.b. The change in ................ of light rays while going from one medium to another is called refraction.
Answer» Fill in the blanks and Explain the completed sentences. a . Refractive index depends on the ............. of light. b. The change in ................ of light rays while going from one medium to another is called refraction.

Discussion

20.	As light from a far off star comes down towards the earth : (a) it bends away from the normal (b) it bends towards the normal (c) it does not bend at all (d) it is reflected back
Answer» As light from a far off star comes down towards the earth : (a) it bends away from the normal (b) it bends towards the normal (c) it does not bend at all (d) it is reflected back

Discussion

21.	He________ in the middle of the stage and he __________out at the audience.
Answer» He________ in the middle of the stage and he __________out at the audience.

Discussion

22.	One of the radioactive radiations is similar to X-rays in nature. Name it and give its properties. [5 MARKS]
Answer» One of the radioactive radiations is similar to X-rays in nature. Name it and give its properties. [5 MARKS]

Discussion

23.	What is the electron distribution in [Co(ox)2(OH)2]-
Answer» What is the electron distribution in [Co(ox)2(OH)2]-

Discussion

24.	There are two identical shacing machines S1 and S2. In machine S1, the width of the workpiece is increased 10% and the feed is decreased by 10%, with respect to that of S1. If all other conditions remain the same then the ratio of total time per pass in S1 and S2 will be(round off to one decimal place).
Answer» There are two identical shacing machines $S_{1}$ and $S_{2}$ . In machine $S_{1}$ , the width of the workpiece is increased $10$ % and the feed is decreased by $10$ %, with respect to that of $S_{1}$ . If all other conditions remain the same then the ratio of total time per pass in $S_{1}$ and $S_{2}$ will be (round off to one decimal place).

Discussion

25.	Why did Ajamil refuse to meet the sheepdog's eyes?
Answer» Why did Ajamil refuse to meet the sheepdog's eyes?

Discussion

26.	State whether the following statement is true or false : A diverging mirror is used as a rear-view mirror.
Answer» State whether the following statement is true or false : A diverging mirror is used as a rear-view mirror.

Discussion

27.	106.If light is travelling along +y direction and corresponding electric field E is along +x direction ,then the direction of magnetic field B is along?
Answer» 106.If light is travelling along +y direction and corresponding electric field E is along +x direction ,then the direction of magnetic field B is along?

Discussion

28.	Q12. Consider the following statements: 1. The Wildlife Protection Act, 1972 is an Act of the Parliament of India enacted for protection of plants and animal species. 2. Schedule I and part II of Schedule II provide absolute protection – offences under these are prescribed the highest penalties. Which of the above statements are correct?
Answer» Q12. Consider the following statements: 1. The Wildlife Protection Act, 1972 is an Act of the Parliament of India enacted for protection of plants and animal species. 2. Schedule I and part II of Schedule II provide absolute protection – offences under these are prescribed the highest penalties. Which of the above statements are correct?

28.

Q12. Consider the following statements: 1. The Wildlife Protection Act, 1972 is an Act of the Parliament of India enacted for protection of plants and animal species. 2. Schedule I and part II of Schedule II provide absolute protection – offences under these are prescribed the highest penalties. Which of the above statements are correct?

Answer»

Q12. Consider the following statements:

1. The Wildlife Protection Act, 1972 is an Act of the Parliament of India enacted for protection of plants and animal species.

2. Schedule I and part II of Schedule II provide absolute protection – offences under these are prescribed the highest penalties.

Which of the above statements are correct?

Discussion

29.	A solenoid has self inductance of 5 mH and the current through it is given by i=5t2 where t is time in second. The induced emf at t=1 s is -
Answer» A solenoid has self inductance of $5 mH$ and the current through it is given by $i = 5 t^{2}$ where $t$ is time in second. The induced emf at $t = 1 s$ is -

Discussion

30.	Where is the earths magmatic field (1) strongest (2) weakest
Answer» Where is the earths magmatic field (1) strongest (2) weakest

Discussion

31.	Question 16 Observe which of these two circuits A or B shows the correct observation?
Answer» Question 16 Observe which of these two circuits A or B shows the correct observation?

Discussion

32.	(a) Draw a diagram to show the formation of image of a distant object by a myopic eye. How can such an eye defect by remedied?(b) State two reasons due to which this eye defect may be caused.(c) A person with a myopic eye cannot see objects beyond a distance of 1.5 m. What would be the power of the corrective lens used to restore proper vision?
Answer» (a) Draw a diagram to show the formation of image of a distant object by a myopic eye. How can such an eye defect by remedied? (b) State two reasons due to which this eye defect may be caused. (c) A person with a myopic eye cannot see objects beyond a distance of 1.5 m. What would be the power of the corrective lens used to restore proper vision?

Discussion

33.	What is the role of an inductor in a circuit?
Answer» What is the role of an inductor in a circuit?

Discussion

34.	A concave lens of glass refractive index 1.5 has both surfaces of same radius of curvature R. On immersion in a medium of refractive index 1.75, it will behave as a: (A) Convergent lens of focal length 3.5R (B) Convergent lens of focal length 3R (C) Divergent lens of focal length 3.5R (D) Divergent lens of focal length 3R
Answer» A concave lens of glass refractive index 1.5 has both surfaces of same radius of curvature R. On immersion in a medium of refractive index 1.75, it will behave as a: (A) Convergent lens of focal length 3.5R (B) Convergent lens of focal length 3R (C) Divergent lens of focal length 3.5R (D) Divergent lens of focal length 3R

Discussion

35.	Phasor representation of Resistance, Reactance of Pure Inductance & Capacitor. Explain it with which one is leading or lagging and why.
Answer» Phasor representation of Resistance, Reactance of Pure Inductance & Capacitor. Explain it with which one is leading or lagging and why.

Discussion

36.	State three factors on which the heat produced by an electric current depends. How does it depend on these factors?
Answer» State three factors on which the heat produced by an electric current depends. How does it depend on these factors?

Discussion

37.	(A) Choose the correct alternative and rewrite the following.(1) The device used for producing current is called a _______.(a) Voltmeter(b) Ammeter(c) Galvanometer(d) Generator(2) At the time of short circuit, the current in the circuit _______.(a) increases(b) decreases(c) remains same(d) increases in steps(3) The direction of the magnetic field around a straight conductor carrying current is given by _______.(a) Right hand rule(b) Fleming’s left hand rule(c) Fleming’s right hand rule(d) none of these(B) Say true or false. If false, write the correct sentence(1) Magnetic poles exist in pairs.(2) Magnetic field increases as we go away from a magnet.(3) Magnetic lines of force always cross each other.(4) Electric generator is used to generate current.(C) Find the odd one out(1) Loudspeaker, microphone, electric motor, bar magnet.(2) Armature coil, brushes, commutator, direct current.(3) Fuse, insulating material, rubber shoes, generator.(4) Voltmeter, ammeter, galvanometer, thermometer.
Answer» (A) Choose the correct alternative and rewrite the following. (1) The device used for producing current is called a _______. (a) Voltmeter (b) Ammeter (c) Galvanometer (d) Generator (2) At the time of short circuit, the current in the circuit _______. (a) increases (b) decreases (c) remains same (d) increases in steps (3) The direction of the magnetic field around a straight conductor carrying current is given by _______. (a) Right hand rule (b) Fleming’s left hand rule (c) Fleming’s right hand rule (d) none of these (B) Say true or false. If false, write the correct sentence (1) Magnetic poles exist in pairs. (2) Magnetic field increases as we go away from a magnet. (3) Magnetic lines of force always cross each other. (4) Electric generator is used to generate current. (C) Find the odd one out (1) Loudspeaker, microphone, electric motor, bar magnet. (2) Armature coil, brushes, commutator, direct current. (3) Fuse, insulating material, rubber shoes, generator. (4) Voltmeter, ammeter, galvanometer, thermometer.

37.

(A) Choose the correct alternative and rewrite the following.(1) The device used for producing current is called a ___.(a) Voltmeter(b) Ammeter(c) Galvanometer(d) Generator(2) At the time of short circuit, the current in the circuit _.(a) increases(b) decreases(c) remains same(d) increases in steps(3) The direction of the magnetic field around a straight conductor carrying current is given by _____.(a) Right hand rule(b) Fleming’s left hand rule(c) Fleming’s right hand rule(d) none of these(B) Say true or false. If false, write the correct sentence(1) Magnetic poles exist in pairs.(2) Magnetic field increases as we go away from a magnet.(3) Magnetic lines of force always cross each other.(4) Electric generator is used to generate current.(C) Find the odd one out(1) Loudspeaker, microphone, electric motor, bar magnet.(2) Armature coil, brushes, commutator, direct current.(3) Fuse, insulating material, rubber shoes, generator.(4) Voltmeter, ammeter, galvanometer, thermometer.

Answer»

(A) Choose the correct alternative and rewrite the following.

(1) The device used for producing current is called a _______.

(a) Voltmeter

(b) Ammeter

(c) Galvanometer

(d) Generator

(2) At the time of short circuit, the current in the circuit _______.

(a) increases

(b) decreases

(c) remains same

(d) increases in steps

(3) The direction of the magnetic field around a straight conductor carrying current is given by _______.

(a) Right hand rule

(b) Fleming’s left hand rule

(c) Fleming’s right hand rule

(d) none of these

(B) Say true or false. If false, write the correct sentence

(1) Magnetic poles exist in pairs.

(2) Magnetic field increases as we go away from a magnet.

(3) Magnetic lines of force always cross each other.

(4) Electric generator is used to generate current.

(C) Find the odd one out

(1) Loudspeaker, microphone, electric motor, bar magnet.

(2) Armature coil, brushes, commutator, direct current.

(3) Fuse, insulating material, rubber shoes, generator.

(4) Voltmeter, ammeter, galvanometer, thermometer.

Discussion

38.	A 3 - phase, 3000 kVA, 0.95 lagging pf load is supplied by a Vee connection at 400V. The kVA output and operating power factor angle of both transformers respectively are
Answer» A 3 - phase, 3000 kVA, 0.95 lagging pf load is supplied by a Vee connection at 400V. The kVA output and operating power factor angle of both transformers respectively are

Discussion

39.	Calculate the power dissipated in 3W for the following circuit:
Answer» Calculate the power dissipated in 3W for the following circuit:

39.

Calculate the power dissipated in 3W for the following circuit:

Answer»

Calculate the power dissipated in 3W for the following circuit:

Discussion

40.	A particle of mass 2 kg travels along a straight line with velocity v=a\sqrt x where a is a constant. Thework done by net force during the displacement ofparticle from x = 0 to x = 4 m is
Answer» A particle of mass 2 kg travels along a straight line with velocity v=a\sqrt x where a is a constant. Thework done by net force during the displacement ofparticle from x = 0 to x = 4 m is

Discussion

41.	68. White light is used in YDSE with D=1m and d=0.9mm. Light teaching this screen at Y= 1mm is passed through a prism and it's spectrum is obtained . FIND the missing lines in visible REGIONS
Answer» 68. White light is used in YDSE with D=1m and d=0.9mm. Light teaching this screen at Y= 1mm is passed through a prism and it's spectrum is obtained . FIND the missing lines in visible REGIONS

Discussion

42.	An incident ray which passes through the centre of curvature of a concave mirror is normal to the mirror surface, and after reflection......................
Answer» An incident ray which passes through the centre of curvature of a concave mirror is normal to the mirror surface, and after reflection......................

Discussion

43.	Why do we bend a bicycle on curved circular path
Answer» Why do we bend a bicycle on curved circular path

Discussion

44.	The law which gives a relation between electric potential difference and electric current is called ___.
Answer» The law which gives a relation between electric potential difference and electric current is called ___.

Discussion

45.	A simply supported beam of span 6m is subjected to several loadings as shown in figure given below.The slope of bending moment diagram just right to point ′D′ is ______ (In kN, measured in clockwise direction).10
Answer» A simply supported beam of span $6 m$ is subjected to several loadings as shown in figure given below. The slope of bending moment diagram just right to point $^{'} D^{'}$ is ______ (In kN, measured in clockwise direction). 10

Discussion

46.	For the shown graph between the magnetic field inside a toroid of 5000 turns and the current passing through it, the mean radius of the toroid is k√3×10−4 m. The value of k is
Answer» For the shown graph between the magnetic field inside a toroid of $5000 turns$ and the current passing through it, the mean radius of the toroid is $\frac{k}{\sqrt{3}} \times 10^{- 4} m$ . The value of $k$ is

Discussion

47.	A denser medium of refractive index 1.5 has a concave surface of radius of curvature 12 cm. An object is situated in the denser medium at a distance of 9 cm from the pole .locate the image due to refraction in air.
Answer» A denser medium of refractive index 1.5 has a concave surface of radius of curvature 12 cm. An object is situated in the denser medium at a distance of 9 cm from the pole .locate the image due to refraction in air.

Discussion

48.	A person can see an object beyond 1m but not closer than it. The defect of the person is?
Answer» A person can see an object beyond 1m but not closer than it. The defect of the person is?

Discussion

49.	when a Ray of light is incident at an angle 60 degree to a medium of refractive index n,it is observed that the angle of refraction is half the angle of incidence the value of n is
Answer» when a Ray of light is incident at an angle 60 degree to a medium of refractive index n,it is observed that the angle of refraction is half the angle of incidence the value of n is

Discussion

50.	If a current I is given by I=I0sin(ωt−π2) flows in an a.c. circuit across which an a.c. potential of E=E0sinωt has been applied, then the power consumption P in the circuit will be-
Answer» If a current $I$ is given by $I = I_{0} sin (ω t - \frac{π}{2})$ flows in an a.c. circuit across which an a.c. potential of $E = E_{0} sin ω t$ has been applied, then the power consumption $P$ in the circuit will be-

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

With regard to the principle of working of an ecg, does the electrocardiograph measure change in potential or change in electric current?

An eye specialist prescribes spectacles having a combination of a convex lens of focal length 40 cm in contact with a concave lens of focal length 25 cm. The power of this lens combination in Dioptre is:

Give three characteristics of a series circuit. [3 MARKS]

Question 6Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilization?(a) Nuclear energy(b) Thermal energy(c) Solar energy(d) Geothermal energy

Two conductors A and B of have their lengths in ratio 4:3, area of cross-section in ratio 1:2 and their resistivities in ratio 2:3 . What will be ratio of their resistances ?

What is the reason for the apparent flattening of the sun’s disc at sunset and sunrise?

A fan of power 550 W works for 3 hours. Calculate the energy consumed.

11.calculate terminal velocity of an oil drop falling freely in air.the radius of drop is 0.01mm and density of oil is 1.1×10 raise to power 3kg/m cube. eta is given:1.8×10raise to -5

What are the functions of haversian canal and volkmann canal and why these are not present in spongy bone?

can the resistance of wire change if we add more cells in the wire

If 100 J of work has to be done in moving an electric charge of 4 C from a place where potential is -5 V to another place, where potential is V volt. The value of V is

lonisation potential of hydrogen atom is 13.6 eV. Hydrogen atom in the ground state are excited by monochromatic light of energy 12.1 eV. The number of spectral lines emitted by hydrogen according to Bohr's theory will be(1)TWO(2)FOUR(3)ONE(4)THREE

The minimum power of eye lens is 40D .if the far point of normal eye is infinity ,find the size of the eyeball

What is resistance? What are different types of combination of resistors ? Why is the current flowing across all the resistors connected in series is same ?

200 g of ice at 0∘C converts into the water at 0∘C in 1 minute when heat is supplied to it at a constant rate. In how much time 200 g of water at 0∘C will change to 20∘C? Specific latent heat of ice = 336 Jg−1​.

Select the correct relations between the velocity (v) of sound in a medium with the density (ρ) and the temperature of the gaseous medium.

Show how you would connect three bulbs, each of resistance 6 Ω, so that the combination has a resistance of(i) 9 Ω(ii) 4 Ω

If a coil of 50 turns area 5.0 cm2 is suddenly removed from magnetic field. It is observed that charge of 5 × 10–4 C flows into the coil. If the resistance of the coil is 100 the magnetic flux density in Wb/m2 is(A) 1 (B) 3( C) 2( D) 4

Fill in the blanks and Explain the completed sentences.a . Refractive index depends on the ............. of light.b. The change in ................ of light rays while going from one medium to another is called refraction.

As light from a far off star comes down towards the earth : (a) it bends away from the normal (b) it bends towards the normal (c) it does not bend at all (d) it is reflected back

He________ in the middle of the stage and he __________out at the audience.

One of the radioactive radiations is similar to X-rays in nature. Name it and give its properties. [5 MARKS]

What is the electron distribution in [Co(ox)2(OH)2]-

Why did Ajamil refuse to meet the sheepdog's eyes?

State whether the following statement is true or false : A diverging mirror is used as a rear-view mirror.

106.If light is travelling along +y direction and corresponding electric field E is along +x direction ,then the direction of magnetic field B is along?

A solenoid has self inductance of 5 mH and the current through it is given by i=5t2 where t is time in second. The induced emf at t=1 s is -

Where is the earths magmatic field (1) strongest (2) weakest

Question 16 Observe which of these two circuits A or B shows the correct observation?

What is the role of an inductor in a circuit?

Phasor representation of Resistance, Reactance of Pure Inductance & Capacitor. Explain it with which one is leading or lagging and why.

State three factors on which the heat produced by an electric current depends. How does it depend on these factors?

A 3 - phase, 3000 kVA, 0.95 lagging pf load is supplied by a Vee connection at 400V. The kVA output and operating power factor angle of both transformers respectively are

Calculate the power dissipated in 3W for the following circuit:

A particle of mass 2 kg travels along a straight line with velocity v=a\sqrt x where a is a constant. Thework done by net force during the displacement ofparticle from x = 0 to x = 4 m is

68. White light is used in YDSE with D=1m and d=0.9mm. Light teaching this screen at Y= 1mm is passed through a prism and it's spectrum is obtained . FIND the missing lines in visible REGIONS

An incident ray which passes through the centre of curvature of a concave mirror is normal to the mirror surface, and after reflection......................

Why do we bend a bicycle on curved circular path

The law which gives a relation between electric potential difference and electric current is called ___.

A simply supported beam of span 6m is subjected to several loadings as shown in figure given below.The slope of bending moment diagram just right to point ′D′ is ______ (In kN, measured in clockwise direction).10

For the shown graph between the magnetic field inside a toroid of 5000 turns and the current passing through it, the mean radius of the toroid is k√3×10−4 m. The value of k is

A denser medium of refractive index 1.5 has a concave surface of radius of curvature 12 cm. An object is situated in the denser medium at a distance of 9 cm from the pole .locate the image due to refraction in air.

A person can see an object beyond 1m but not closer than it. The defect of the person is?

when a Ray of light is incident at an angle 60 degree to a medium of refractive index n,it is observed that the angle of refraction is half the angle of incidence the value of n is

If a current I is given by I=I0sin(ωt−π2) flows in an a.c. circuit across which an a.c. potential of E=E0sinωt has been applied, then the power consumption P in the circuit will be-

200 g of ice at 0∘C converts into the water at 0∘C in 1 minute when heat is supplied to it at a constant rate. In how much time 200 g of water at 0∘C will change to 20∘C? Specific latent heat of ice = 336 Jg−1.

He in the middle of the stage and he __out at the audience.