16569 + Interview Questions in Physics

1.	A wire as shown in the figure carries a current of 2A.The semicircle has radius of 4cm, the magnetic field at the center C will be
Answer» A wire as shown in the figure carries a current of 2A.The semicircle has radius of 4cm, the magnetic field at the center C will be

Discussion

2.	A nucleus X initially at rest, undergoes alpha decay according to the equation,ZX232→ 90YA+αWhat fraction of the total energy released in the decay will be the kinetic energy of the alpha particle.
Answer» A nucleus $X$ initially at rest, undergoes alpha decay according to the equation, $_{Z} X^{232} \to_{90} Y^{A} + α$ What fraction of the total energy released in the decay will be the kinetic energy of the alpha particle.

Discussion

3.	If you want to see an enlarged image of your face, state whether you will use a concave mirror or a convex mirror ?
Answer» If you want to see an enlarged image of your face, state whether you will use a concave mirror or a convex mirror ?

Discussion

4.	find the mass ofphoton in motion
Answer» find the mass ofphoton in motion

Discussion

5.	A force of 60 N acts on a body which moves it through a distance of 4 m on a horizontal surface. What is the work done, if the direction of the force is at an angle of 60∘ to the horizontal surface?
Answer» A force of 60 N acts on a body which moves it through a distance of 4 m on a horizontal surface. What is the work done, if the direction of the force is at an angle of $60^{\circ}$ to the horizontal surface?

Discussion

6.	Name the groove which demarcates two ventricles externally.__
Answer» Name the groove which demarcates two ventricles externally.__

Discussion

7.	Why do Helium, Neon and Argon have a zero valency?
Answer» Why do Helium, Neon and Argon have a zero valency?

Discussion

8.	A stone of mass 64.0 g is thrown vertically upward from the ground with an initial speed of 20.0 ms-1. The gravitational potential energy at the ground level is considered to be zero. Applying the principle of conservation of energy, the potential energy attained the total energy of the stone at its halfway point can be calculated to be: (g= 10 m s-2).
Answer» A stone of mass 64.0 g is thrown vertically upward from the ground with an initial speed of 20.0 ms^-1. The gravitational potential energy at the ground level is considered to be zero. Applying the principle of conservation of energy, the potential energy attained the total energy of the stone at its halfway point can be calculated to be: (g= 10 m s^-2).

Discussion

9.	Consider the following sequential radioactive decayX α −→Y β −→Z200100then the atomic number of X is
Answer» Consider the following sequential radioactive decay $X α - \to Y β - \to Z_{100}^{200}$ then the atomic number of $X$ is

Discussion

10.	How to find the hybridisation P in P_{4 }0_{10
Answer» How to find the hybridisation P in P_{4 }0_{10

Discussion

11.	Energy released by fission 1kg uranium.
Answer» Energy released by fission 1kg uranium.

Discussion

12.	A wire of resis†an ce 25 ohm is connected across a car battery of 12volt emf and negligible internal resis†an ce . How much heat energy is produced in 30 minutes?
Answer» A wire of resis†an ce 25 ohm is connected across a car battery of 12volt emf and negligible internal resis†an ce . How much heat energy is produced in 30 minutes?

Discussion

13.	Find out the image position formed by the concave mirror, if the first image formed by the plane mirror is taken as an object for the given concave mirror.
Answer» Find out the image position formed by the concave mirror, if the first image formed by the plane mirror is taken as an object for the given concave mirror.

Discussion

14.	(a) How does an electromagnet differ from a permanent magnet ? (b) Name two devices in which electromagnets are used and two devices where permanent magnets are used.
Answer» (a) How does an electromagnet differ from a permanent magnet ? (b) Name two devices in which electromagnets are used and two devices where permanent magnets are used.

14.

(a) How does an electromagnet differ from a permanent magnet ? (b) Name two devices in which electromagnets are used and two devices where permanent magnets are used.

Answer»

(a) How does an electromagnet differ from a permanent magnet ?

(b) Name two devices in which electromagnets are used and two devices where permanent magnets are used.

Discussion

15.	Calculate the amount of heat required to convert 1.00 kg of ice at −10∘C into steam at 100∘C at normal pressure. (Sice=2100 J kg−1K−1, Swater=4200 J kg−1K−1, Lf,ice=3.36×105 J kg−1, Lv,water=2.25×106 J kg−1)
Answer» Calculate the amount of heat required to convert 1.00 kg of ice at $- 10^{\circ}$ C into steam at $100^{\circ}$ C at normal pressure. $(S_{i c e} = 2100 J k g^{- 1} K^{- 1},$ $S_{w a t e r} = 4200 J k g^{- 1} K^{- 1},$ $L_{f, i c e} = 3.36 \times 10^{5} J k g^{- 1}$ , $L_{v, w a t e r} = 2.25 \times 10^{6} J k g^{- 1})$

Discussion

16.	A rod of length 100 m is pivoted at a distance of 60 m from one end. A block of mass 10 kg is suspended at the other end of the rod. If the rod is in equilibrium, find the mass of the rod. Take acceleration due to gravity g = 10 ms−2
Answer» A rod of length 100 m is pivoted at a distance of 60 m from one end. A block of mass 10 kg is suspended at the other end of the rod. If the rod is in equilibrium, find the mass of the rod. Take acceleration due to gravity $g$ = $10 m s^{-} 2$

Discussion

17.	"Geographical features of Kerala and undesired human intervention increased the intensity of floods that came last year". In view of this statement, review the geographical factors responsible for the flood in Kerala.
Answer» "Geographical features of Kerala and undesired human intervention increased the intensity of floods that came last year". In view of this statement, review the geographical factors responsible for the flood in Kerala.

Discussion

18.	Which of the following graphs is incorrect for a conductor at a given temperature?
Answer» Which of the following graphs is incorrect for a conductor at a given temperature?

Discussion

19.	What is meant by scattering of light?
Answer» What is meant by scattering of light?

Discussion

20.	The magnetic field in a given region is uniform. Draw a diagram to represent it.
Answer» The magnetic field in a given region is uniform. Draw a diagram to represent it.

Discussion

21.	The resistance of this V- l graph is?
Answer» The resistance of this V- l graph is?

Discussion

22.	A conducting ring of mass 2 kg and radius 0.5 m is placed on a smooth horizontal plane. The ring carries a current i=4 A.A horizontal magnetic field B=10 T is switched on at time t=0 as shown in figure.The initial angular accelaration of the ring will be:
Answer» A conducting ring of mass $2 kg$ and radius $0.5 m$ is placed on a smooth horizontal plane. The ring carries a current $i = 4 A$ . A horizontal magnetic field $B = 10 T$ is switched on at time $t = 0$ as shown in figure. The initial angular accelaration of the ring will be:

Discussion

23.	Explain continuous variations and discontinuous variations?
Answer» Explain continuous variations and discontinuous variations?

Discussion

24.	A satellite is orbiting around the earth with total energy E. What will happen if the satellite's kinetic energy is made 2E?-1) radius of the orbit will be doubled. 2) radius of the orbit will be halved, 3) period of revolution is doubled, 4)satellite escapes away.
Answer» A satellite is orbiting around the earth with total energy E. What will happen if the satellite's kinetic energy is made 2E?-1) radius of the orbit will be doubled. 2) radius of the orbit will be halved, 3) period of revolution is doubled, 4)satellite escapes away.

Discussion

25.	The average power dissipated in the resistor is
Answer» The average power dissipated in the resistor is

Discussion

26.	A current of 9.65 A is drawn from a daniell cell for exactly 1 hr. The loss in mass at anode and gain in mass at cathode respectively is
Answer» A current of 9.65 A is drawn from a daniell cell for exactly 1 hr. The loss in mass at anode and gain in mass at cathode respectively is

Discussion

27.	An image which can be obtained on a screen is known as _____.
Answer» An image which can be obtained on a screen is known as _____.

Discussion

28.	18.Parallel light rays are falling on the plane surface of a semi cylinder made of glass, at an angle of 45 degree in such a plane which is perpendicular to the axis of the semi cylinder. Index of refraction is 1.414. Geomatrically show the light rays which will come out of curved part of cylinder. If arc of the emerging rays , subtends a central angle of 15X degree, calculate X.
Answer» 18.Parallel light rays are falling on the plane surface of a semi cylinder made of glass, at an angle of 45 degree in such a plane which is perpendicular to the axis of the semi cylinder. Index of refraction is 1.414. Geomatrically show the light rays which will come out of curved part of cylinder. If arc of the emerging rays , subtends a central angle of 15X degree, calculate X.

Discussion

29.	What is a spectrum? Why do different coloured rays deviate differently on passing through a glass prism?
Answer» What is a spectrum? Why do different coloured rays deviate differently on passing through a glass prism?

Discussion

30.	A person can lift the maximum of 15 kg on the Earth. If the moon's gravity is 16th of the Earth, what will be the maximum mass he can lift?
Answer» A person can lift the maximum of $15 k g$ on the Earth. If the moon's gravity is $\frac{1}{6} t h$ of the Earth, what will be the maximum mass he can lift?

Discussion

31.	In 10 second a charge of 25 c leaves a battery and 200j of energy are delivered to outside circuit as a result, what is potencial difference across battery and what current flows from battery.
Answer» In 10 second a charge of 25 c leaves a battery and 200j of energy are delivered to outside circuit as a result, what is potencial difference across battery and what current flows from battery.

Discussion

32.	Measurement of very long distances like the distance of stars from the earth requires some special methods. List few of the techniques used to determine such distances.
Answer» Measurement of very long distances like the distance of stars from the earth requires some special methods. List few of the techniques used to determine such distances.

Discussion

33.	The internal resistance of a 2.1V cell which gives a current of 0.2A through a resistance of 10 Ω is _______.
Answer» The internal resistance of a $2.1 V$ cell which gives a current of $0.2 A$ through a resistance of $10 Ω$ is _______.

Discussion

34.	In per unit what is the maximum and minimum voltage regulation of transformer (approximately) respectively,
Answer» In per unit what is the maximum and minimum voltage regulation of transformer (approximately) respectively,

Discussion

35.	When a soft iron core is introduced in a coil, the strength of the magnetic field:
Answer» When a soft iron core is introduced in a coil, the strength of the magnetic field:

Discussion

36.	Why are protein digesting enzymes released as inactive enzymes
Answer» Why are protein digesting enzymes released as inactive enzymes

Discussion

37.	A churge O is divided into two pants uf g andIf the coulomb repulsion between them whenare separated is to te maxinmum, the rafio ef Qshauld h(1)2 212 (3)4 (4)1
Answer» A churge O is divided into two pants uf g andIf the coulomb repulsion between them whenare separated is to te maxinmum, the rafio ef Qshauld h(1)2 212 (3)4 (4)1

Discussion

38.	1 calorie = ___
Answer» 1 calorie = ___

Discussion

39.	Which type/types of power generation involve maximum number of steps of energy conversion? In which power generation is the number minimum?
Answer» Which type/types of power generation involve maximum number of steps of energy conversion? In which power generation is the number minimum?

Discussion

40.	Why does the frequency of light remains unchanged but the wavelength of light changes while passing from one medium to other?
Answer» Why does the frequency of light remains unchanged but the wavelength of light changes while passing from one medium to other?

Discussion

41.	Calculate the equivalent resistance of the given circuit and also find the ammeter reading.
Answer» Calculate the equivalent resistance of the given circuit and also find the ammeter reading.

Discussion

42.	An unpolarised light is incident on a plate of refractive index √3 and the reflected light is found to be completely plane polarized. The angles of incidence and refraction are respectively
Answer» An unpolarised light is incident on a plate of refractive index $\sqrt{3}$ and the reflected light is found to be completely plane polarized. The angles of incidence and refraction are respectively

Discussion

43.	Write a short note on AC generator
Answer» Write a short note on AC generator

Discussion

44.	A rigid rod is placed against the wall as shown in the figure when the velocity of lower end is 10m/s. And its base makes an angle 60 degree with the horizontal then the velocity of its end B will be?
Answer» A rigid rod is placed against the wall as shown in the figure when the velocity of lower end is 10m/s. And its base makes an angle 60 degree with the horizontal then the velocity of its end B will be?

Discussion

45.	Four equal resistance dissipated 5W of power together when connected in series to a battery of negligible internal resistance. The total power dissipated in these resistance when connected in parallel across the same battery would be
Answer» Four equal resistance dissipated 5W of power together when connected in series to a battery of negligible internal resistance. The total power dissipated in these resistance when connected in parallel across the same battery would be

Discussion

46.	Explain the formula of power = workdonetime. How 'v' is derived from the formula?
Answer» Explain the formula of power = $\frac{w o r k d o n e}{t i m e}$ . How 'v' is derived from the formula?

Discussion

47.	What is the nature of the image formed by a convex lens if the magnification produced by the lens is +3 ?
Answer» What is the nature of the image formed by a convex lens if the magnification produced by the lens is +3 ?

Discussion

48.	A lens having two spherical surface bulging outward is called ______________.
Answer» A lens having two spherical surface bulging outward is called ______________.

Discussion

49.	We know that vector quantities can only be added with the help of vector algebra. Also, area is a vector quantity (area vector), whose direction is perpendicular to the surface. But we can add surface areas of different shapes by simply adding them. Thus, to add areas, we do not need laws of vector addition. Then why is area considered to be a vector quantity?
Answer» We know that vector quantities can only be added with the help of vector algebra. Also, area is a vector quantity (area vector), whose direction is perpendicular to the surface. But we can add surface areas of different shapes by simply adding them. Thus, to add areas, we do not need laws of vector addition. Then why is area considered to be a vector quantity?

Discussion

50.	Label the different parts of the plant given below:
Answer» Label the different parts of the plant given below:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A wire as shown in the figure carries a current of 2A.The semicircle has radius of 4cm, the magnetic field at the center C will be

A nucleus X initially at rest, undergoes alpha decay according to the equation,ZX232→ 90YA+αWhat fraction of the total energy released in the decay will be the kinetic energy of the alpha particle.

If you want to see an enlarged image of your face, state whether you will use a concave mirror or a convex mirror ?

find the mass ofphoton in motion

A force of 60 N acts on a body which moves it through a distance of 4 m on a horizontal surface. What is the work done, if the direction of the force is at an angle of 60∘ to the horizontal surface?

Name the groove which demarcates two ventricles externally.__

Why do Helium, Neon and Argon have a zero valency?

Consider the following sequential radioactive decayX α −→Y β −→Z200100then the atomic number of X is

How to find the hybridisation P in P_{4 }0_{10

Energy released by fission 1kg uranium.

A wire of resis†an ce 25 ohm is connected across a car battery of 12volt emf and negligible internal resis†an ce . How much heat energy is produced in 30 minutes?

Find out the image position formed by the concave mirror, if the first image formed by the plane mirror is taken as an object for the given concave mirror.

(a) How does an electromagnet differ from a permanent magnet ? (b) Name two devices in which electromagnets are used and two devices where permanent magnets are used.

Calculate the amount of heat required to convert 1.00 kg of ice at −10∘C into steam at 100∘C at normal pressure. (Sice=2100 J kg−1K−1, Swater=4200 J kg−1K−1, Lf,ice=3.36×105 J kg−1, Lv,water=2.25×106 J kg−1)

A rod of length 100 m is pivoted at a distance of 60 m from one end. A block of mass 10 kg is suspended at the other end of the rod. If the rod is in equilibrium, find the mass of the rod. Take acceleration due to gravity g = 10 ms−2

"Geographical features of Kerala and undesired human intervention increased the intensity of floods that came last year". In view of this statement, review the geographical factors responsible for the flood in Kerala.

Which of the following graphs is incorrect for a conductor at a given temperature?

What is meant by scattering of light?

The magnetic field in a given region is uniform. Draw a diagram to represent it.

The resistance of this V- l graph is?

A conducting ring of mass 2 kg and radius 0.5 m is placed on a smooth horizontal plane. The ring carries a current i=4 A.A horizontal magnetic field B=10 T is switched on at time t=0 as shown in figure.The initial angular accelaration of the ring will be:

Explain continuous variations and discontinuous variations?

A satellite is orbiting around the earth with total energy E. What will happen if the satellite's kinetic energy is made 2E?-1) radius of the orbit will be doubled. 2) radius of the orbit will be halved, 3) period of revolution is doubled, 4)satellite escapes away.

The average power dissipated in the resistor is

A current of 9.65 A is drawn from a daniell cell for exactly 1 hr. The loss in mass at anode and gain in mass at cathode respectively is

An image which can be obtained on a screen is known as _____.

What is a spectrum? Why do different coloured rays deviate differently on passing through a glass prism?

A person can lift the maximum of 15 kg on the Earth. If the moon's gravity is 16th of the Earth, what will be the maximum mass he can lift?

In 10 second a charge of 25 c leaves a battery and 200j of energy are delivered to outside circuit as a result, what is potencial difference across battery and what current flows from battery.

Measurement of very long distances like the distance of stars from the earth requires some special methods. List few of the techniques used to determine such distances.

The internal resistance of a 2.1V cell which gives a current of 0.2A through a resistance of 10 Ω is _______.

In per unit what is the maximum and minimum voltage regulation of transformer (approximately) respectively,

When a soft iron core is introduced in a coil, the strength of the magnetic field:

Why are protein digesting enzymes released as inactive enzymes

A churge O is divided into two pants uf g andIf the coulomb repulsion between them whenare separated is to te maxinmum, the rafio ef Qshauld h(1)2 212 (3)4 (4)1

1 calorie = ___

Which type/types of power generation involve maximum number of steps of energy conversion? In which power generation is the number minimum?

Why does the frequency of light remains unchanged but the wavelength of light changes while passing from one medium to other?

Calculate the equivalent resistance of the given circuit and also find the ammeter reading.

An unpolarised light is incident on a plate of refractive index √3 and the reflected light is found to be completely plane polarized. The angles of incidence and refraction are respectively

Write a short note on AC generator

A rigid rod is placed against the wall as shown in the figure when the velocity of lower end is 10m/s. And its base makes an angle 60 degree with the horizontal then the velocity of its end B will be?

Four equal resistance dissipated 5W of power together when connected in series to a battery of negligible internal resistance. The total power dissipated in these resistance when connected in parallel across the same battery would be

Explain the formula of power = workdonetime. How 'v' is derived from the formula?

What is the nature of the image formed by a convex lens if the magnification produced by the lens is +3 ?

A lens having two spherical surface bulging outward is called ______________.

Label the different parts of the plant given below: