16569 + Interview Questions in Physics

1.	What will happen to a ray passing through focus of a concave mirror after reflection?
Answer» What will happen to a ray passing through focus of a concave mirror after reflection?

Discussion

2.	Far sightedness is term also used for
Answer» Far sightedness is term also used for

Discussion

3.	Explain all defects of vision and their corrections.
Answer» Explain all defects of vision and their corrections.

Discussion

4.	Question 3 The least distance of distinct vision for a young adult with normal vision is about (a) 25 m (b) 2.5 cm (c) 25 cm (d) 2.5 m
Answer» Question 3 The least distance of distinct vision for a young adult with normal vision is about (a) 25 m (b) 2.5 cm (c) 25 cm (d) 2.5 m

Discussion

5.	Find equivalent resistance between A & B in the circuit is
Answer» Find equivalent resistance between A & B in the circuit is

Discussion

6.	A coil connected to a battery is placed (primary coil) is placed next to another coil (secondary coil) connected to a galvanometer (no battery). What will you observe when: i) Current in the primary coil is switched on ii) Current becomes steady in the primary coil
Answer» A coil connected to a battery is placed (primary coil) is placed next to another coil (secondary coil) connected to a galvanometer (no battery). What will you observe when: i) Current in the primary coil is switched on ii) Current becomes steady in the primary coil

6.

A coil connected to a battery is placed (primary coil) is placed next to another coil (secondary coil) connected to a galvanometer (no battery). What will you observe when: i) Current in the primary coil is switched on ii) Current becomes steady in the primary coil

Answer»

A coil connected to a battery is placed (primary coil) is placed next to another coil (secondary coil) connected to a galvanometer (no battery). What will you observe when:

i) Current in the primary coil is switched on

ii) Current becomes steady in the primary coil

Discussion

7.	The radius and mass of earth are increased by 0.5%. Which of the following statements are true at the surface of the earth
Answer» The radius and mass of earth are increased by 0.5%. Which of the following statements are true at the surface of the earth

Discussion

8.	An electric kettle is rated at 230 V, 1000 W. What is the resistance of its element?
Answer» An electric kettle is rated at 230 V, 1000 W. What is the resistance of its element?

Discussion

9.	A 3 cm high object is placed at a distance of 80 cm from a concave lens of focal length 20 cm. Find the size of the image.
Answer» A $3 c m$ high object is placed at a distance of $80 c m$ from a concave lens of focal length $20 c m$ . Find the size of the image.

Discussion

10.	Explain optical fiber and uses of an optical fiber.
Answer» Explain optical fiber and uses of an optical fiber.

Discussion

11.	Which of the following is more environment friendly ? (a) burning of diesel (b) burning of coal (c) burning of charcoal (d) burning of wood
Answer» Which of the following is more environment friendly ? (a) burning of diesel (b) burning of coal (c) burning of charcoal (d) burning of wood

Discussion

12.	Why is the wavelength of blue is so less?
Answer» Why is the wavelength of blue is so less?

Discussion

13.	What is the process of strengthening the electrical signals?
Answer» What is the process of strengthening the electrical signals?

Discussion

14.	The following circuit diagram shows the experimental set up for the study of dependence of current on potential difference. Which two circuit components are connected in series?
Answer» The following circuit diagram shows the experimental set up for the study of dependence of current on potential difference. Which two circuit components are connected in series?

14.

The following circuit diagram shows the experimental set up for the study of dependence of current on potential difference. Which two circuit components are connected in series?

Answer»

The following circuit diagram shows the experimental set up for the study of dependence of current on potential difference. Which two circuit components are connected in series?

Discussion

15.	A thermometer is graduated in mm. It registers - 3mm when the bulb of thermometer is in pure melting ice and 22mm when the thermometer is in steam at a pressure of one atm. The temperature in ∘C when the thermometer registers 13mm is
Answer» A thermometer is graduated in mm. It registers - 3mm when the bulb of thermometer is in pure melting ice and 22mm when the thermometer is in steam at a pressure of one atm. The temperature in $^{\circ} C$ when the thermometer registers 13mm is

Discussion

16.	If the initial velocity of m1 is v m/s and initial velocity of m2 is 2 v m/s. After collision m2 stops, then what is the final velocity of m1 after collision? If m1 = m Kg and m2 = 2m Kg.
Answer» If the initial velocity of m₁is v m/s and initial velocity of m₂ is 2 v m/s. After collision m₂stops, then what is the final velocity of m₁ after collision? If m₁ = m Kg and m₂ = 2m Kg.

Discussion

17.	On which principle does discharge lamp work?
Answer» On which principle does discharge lamp work?

Discussion

18.	The near point of a hypermetropic eye is 75 cm from the eye. What is the power of the lens required to enable him to read clearly a book held at 25 cm from the eye?
Answer» The near point of a hypermetropic eye is 75 cm from the eye. What is the power of the lens required to enable him to read clearly a book held at 25 cm from the eye?

Discussion

19.	What will be the daughter nuclei after 4 alpha decays of 231 91Pa?
Answer» What will be the daughter nuclei after 4 alpha decays of $_{91}^{231} P a$ ?

Discussion

20.	Who was Confucius?
Answer» Who was Confucius?

Discussion

21.	What is "dispersion of white light"? Draw a labelled diagram to illustrate the recombination of the spectrum of white light.
Answer» What is "dispersion of white light"? Draw a labelled diagram to illustrate the recombination of the spectrum of white light.

Discussion

22.	If the focal length of a convex mirror is 25 cm, what is its radius of curvature ?
Answer» If the focal length of a convex mirror is 25 cm, what is its radius of curvature ?

Discussion

23.	A magnet is moving towards a coil as shown in the figure, what is the cause of the production of induced current in the figure shown?
Answer» A magnet is moving towards a coil as shown in the figure, what is the cause of the production of induced current in the figure shown?

23.

A magnet is moving towards a coil as shown in the figure, what is the cause of the production of induced current in the figure shown?

Answer»

A magnet is moving towards a coil as shown in the figure, what is the cause of the production of induced current in the figure shown?

Discussion

24.	The frequencies of two sound sources are 256 Hz and 260 Hz. At t = 0, the intensity of sound is maximum. Then the phase difference at the time t = 116 sec will be
Answer» The frequencies of two sound sources are 256 Hz and 260 Hz. At t = 0, the intensity of sound is maximum. Then the phase difference at the time t = $\frac{1}{16}$ sec will be

Discussion

25.	A body of mass 6 kg collides with another body at rest. After the collision, they travel together with a velocity that is one third of the initial velocity of 6 kg mass. The mass of the second body is
Answer» A body of mass 6 kg collides with another body at rest. After the collision, they travel together with a velocity that is one third of the initial velocity of 6 kg mass. The mass of the second body is

Discussion

26.	The unit for measuring intensity is:
Answer» The unit for measuring intensity is:

Discussion

27.	Changing of a liquid into vapours from its surface without heating it is called ___.
Answer» Changing of a liquid into vapours from its surface without heating it is called ___.

27.

Changing of a liquid into vapours from its surface without heating it is called ___.

Answer»

Changing of a liquid into vapours from its surface without heating it is called ___.

Discussion

28.	Potential difference across a battery is 9V. On connecting a 24Ω resistor across the terminals of the battery, the voltmeter reads 7.2 V. Calculate the internal resistance of the battery.
Answer» Potential difference across a battery is 9V. On connecting a $24 Ω$ resistor across the terminals of the battery, the voltmeter reads 7.2 V. Calculate the internal resistance of the battery.

Discussion

29.	A magnet attracts: (a) plastics (b) any metal (c) aluminium (d) iron and steel
Answer» A magnet attracts: (a) plastics (b) any metal (c) aluminium (d) iron and steel

29.

A magnet attracts: (a) plastics (b) any metal (c) aluminium (d) iron and steel

Answer»

A magnet attracts:

(a) plastics

(b) any metal

(c) aluminium

(d) iron and steel

Discussion

30.	Refractive index of diamond is 2.42. Calculate the speed of light in diamond.
Answer» Refractive index of diamond is 2.42. Calculate the speed of light in diamond.

Discussion

31.	A lens will be invisible in vacuum when the refractive index of the lens is
Answer» A lens will be invisible in vacuum when the refractive index of the lens is

Discussion

32.	When we enter into a dark room our vision is impaired for few seconds. Why does this happen?
Answer» When we enter into a dark room our vision is impaired for few seconds. Why does this happen?

Discussion

33.	When a convex mirror of focal 'f' produces an image (1/n)th of the size of the object, then distance of the object from the mirror is what
Answer» When a convex mirror of focal 'f' produces an image (1/n)th of the size of the object, then distance of the object from the mirror is what

Discussion

34.	Suppose half of a concave mirror reflecting surface is covered with a black soot. how will the image of an object in front of the mirror be affected?
Answer» Suppose half of a concave mirror reflecting surface is covered with a black soot. how will the image of an object in front of the mirror be affected?

Discussion

35.	An air bubble in a glass slab of refractive index 1.5 is 5 cm deep viewed from one face and 2 cm deep when viewed from the opposite face. The thickness of the slab is
Answer» An air bubble in a glass slab of refractive index 1.5 is 5 cm deep viewed from one face and 2 cm deep when viewed from the opposite face. The thickness of the slab is

Discussion

36.	what are sign conventions how they are used
Answer» what are sign conventions how they are used

Discussion

37.	The area of a circle is A1, and the area of a regular pentagon inscribed in a circle is A2 . Then A1:A2 is
Answer» The area of a circle is $A_{1}$ , and the area of a regular pentagon inscribed in a circle is $A_{2}$ . Then $A_{1} : A_{2}$ is

Discussion

38.	A force of 10.5 N is applied at the end of a circular disc pivoted at center. The diameter of the disc is 0.5 m, calculate the moment of force generated due to this force.
Answer» A force of $10.5 N$ is applied at the end of a circular disc pivoted at center. The diameter of the disc is $0.5 m$ , calculate the moment of force generated due to this force.

38.

A force of 10.5 N is applied at the end of a circular disc pivoted at center. The diameter of the disc is 0.5 m, calculate the moment of force generated due to this force.

Answer»

A force of $10.5 N$ is applied at the end of a circular disc pivoted at center. The diameter of the disc is $0.5 m$ , calculate the moment of force generated due to this force.

Discussion

39.	The thermal conductance (reciprocal of the thermal resistance) for axial flow of a truncated cone of length l is πK(r1r2)ln2. If the radius at the two ends of the cone are r1 and r2 and thermal conductivity of the material is K, then the value of n2 is
Answer» The thermal conductance (reciprocal of the thermal resistance) for axial flow of a truncated cone of length $l$ is $\frac{π K (r_{1} r_{2})}{l} n^{2}$ . If the radius at the two ends of the cone are $r_{1}$ and $r_{2}$ and thermal conductivity of the material is $K$ , then the value of $n^{2}$ is

Discussion

40.	Consider the ground state of Cr atom (Z = 24). The number of electrons with the azimuthal quantum numbers, I = 1 and 2 are, respectively
Answer» Consider the ground state of $C r$ atom (Z = 24). The number of electrons with the azimuthal quantum numbers, $I$ = 1 and 2 are, respectively

Discussion

41.	A man holds a spherical shaving mirror of radius of curvature 60 cm, and focal length 30 cm, a t a distance of 15 cm, from his nose. Find the position of image, and calculate the magnification.
Answer» A man holds a spherical shaving mirror of radius of curvature 60 cm, and focal length 30 cm, a t a distance of 15 cm, from his nose. Find the position of image, and calculate the magnification.

Discussion

42.	An object is placed at a large distance in front of a concave mirror of radius of curvature 40 cm. The image will be formed in front of the mirror at a distance of : ( (a) 20 cm (b) 30 cm c) 40 cm (d) 50 cm
Answer» An object is placed at a large distance in front of a concave mirror of radius of curvature 40 cm. The image will be formed in front of the mirror at a distance of : ( (a) 20 cm (b) 30 cm c) 40 cm (d) 50 cm

Discussion

43.	The cause of refraction of light is
Answer» The cause of refraction of light is

Discussion

44.	Which of the following statements is true/correct
Answer» Which of the following statements is true/correct

44.

Which of the following statements is true/correct

Answer»

Which of the following statements is true/correct

Discussion

45.	A current will not flow in the absence of?
Answer» A current will not flow in the absence of?

Discussion

46.	From the options given below, identify the environment related problems that are caused by the construction of large dams.
Answer» From the options given below, identify the environment related problems that are caused by the construction of large dams.

Discussion

47.	Which one of the following statements about power stations is not true ? (a) hydroelectric power stations use water to drive turbines (b) in a power station, turbines drive generators (c) electricity from thermal power stations differs from that produced in hydroelectric power stations (d) in hydroelectric power stations and thermal power stations, alternators produce electricity
Answer» Which one of the following statements about power stations is not true ? (a) hydroelectric power stations use water to drive turbines (b) in a power station, turbines drive generators (c) electricity from thermal power stations differs from that produced in hydroelectric power stations (d) in hydroelectric power stations and thermal power stations, alternators produce electricity

47.

Which one of the following statements about power stations is not true ? (a) hydroelectric power stations use water to drive turbines (b) in a power station, turbines drive generators (c) electricity from thermal power stations differs from that produced in hydroelectric power stations (d) in hydroelectric power stations and thermal power stations, alternators produce electricity

Answer»

Which one of the following statements about power stations is not true ?

(a) hydroelectric power stations use water to drive turbines

(b) in a power station, turbines drive generators

(c) electricity from thermal power stations differs from that produced in hydroelectric power stations

(d) in hydroelectric power stations and thermal power stations, alternators produce electricity

Discussion

48.	If the magnification has a positive sign, the image formed by the concave mirror must be
Answer» If the magnification has a positive sign, the image formed by the concave mirror must be

Discussion

49.	The frequency of power supply used in India is _____ Hz.
Answer» The frequency of power supply used in India is _____ Hz.

Discussion

50.	A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 40 cm. Calculate the : (a) Power of each lens (b) Power of resulted lens (c) Nature of resulted lens (d) Focal length of the resulted lens [5 MARKS]
Answer» A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 40 cm. Calculate the : (a) Power of each lens (b) Power of resulted lens (c) Nature of resulted lens (d) Focal length of the resulted lens [5 MARKS]

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What will happen to a ray passing through focus of a concave mirror after reflection?

Far sightedness is term also used for

Explain all defects of vision and their corrections.

Question 3 The least distance of distinct vision for a young adult with normal vision is about (a) 25 m (b) 2.5 cm (c) 25 cm (d) 2.5 m

Find equivalent resistance between A &amp; B in the circuit is

A coil connected to a battery is placed (primary coil) is placed next to another coil (secondary coil) connected to a galvanometer (no battery). What will you observe when: i) Current in the primary coil is switched on ii) Current becomes steady in the primary coil

The radius and mass of earth are increased by 0.5%. Which of the following statements are true at the surface of the earth

An electric kettle is rated at 230 V, 1000 W. What is the resistance of its element?

A 3 cm high object is placed at a distance of 80 cm from a concave lens of focal length 20 cm. Find the size of the image.

Explain optical fiber and uses of an optical fiber.

Which of the following is more environment friendly ? (a) burning of diesel (b) burning of coal (c) burning of charcoal (d) burning of wood

Why is the wavelength of blue is so less?

What is the process of strengthening the electrical signals?

The following circuit diagram shows the experimental set up for the study of dependence of current on potential difference. Which two circuit components are connected in series?

A thermometer is graduated in mm. It registers - 3mm when the bulb of thermometer is in pure melting ice and 22mm when the thermometer is in steam at a pressure of one atm. The temperature in ∘C when the thermometer registers 13mm is

If the initial velocity of m1 is v m/s and initial velocity of m2 is 2 v m/s. After collision m2 stops, then what is the final velocity of m1 after collision? If m1 = m Kg and m2 = 2m Kg.

On which principle does discharge lamp work?

The near point of a hypermetropic eye is 75 cm from the eye. What is the power of the lens required to enable him to read clearly a book held at 25 cm from the eye?

What will be the daughter nuclei after 4 alpha decays of 231 91Pa?

Who was Confucius?

What is "dispersion of white light"? Draw a labelled diagram to illustrate the recombination of the spectrum of white light.

If the focal length of a convex mirror is 25 cm, what is its radius of curvature ?

A magnet is moving towards a coil as shown in the figure, what is the cause of the production of induced current in the figure shown?

The frequencies of two sound sources are 256 Hz and 260 Hz. At t = 0, the intensity of sound is maximum. Then the phase difference at the time t = 116 sec will be

A body of mass 6 kg collides with another body at rest. After the collision, they travel together with a velocity that is one third of the initial velocity of 6 kg mass. The mass of the second body is

The unit for measuring intensity is:

Changing of a liquid into vapours from its surface without heating it is called ___.

Potential difference across a battery is 9V. On connecting a 24Ω resistor across the terminals of the battery, the voltmeter reads 7.2 V. Calculate the internal resistance of the battery.

A magnet attracts: (a) plastics (b) any metal (c) aluminium (d) iron and steel

Refractive index of diamond is 2.42. Calculate the speed of light in diamond.

A lens will be invisible in vacuum when the refractive index of the lens is

When we enter into a dark room our vision is impaired for few seconds. Why does this happen?

When a convex mirror of focal 'f' produces an image (1/n)th of the size of the object, then distance of the object from the mirror is what

Suppose half of a concave mirror reflecting surface is covered with a black soot. how will the image of an object in front of the mirror be affected?

An air bubble in a glass slab of refractive index 1.5 is 5 cm deep viewed from one face and 2 cm deep when viewed from the opposite face. The thickness of the slab is

what are sign conventions how they are used

The area of a circle is A1, and the area of a regular pentagon inscribed in a circle is A2 . Then A1:A2 is

A force of 10.5 N is applied at the end of a circular disc pivoted at center. The diameter of the disc is 0.5 m, calculate the moment of force generated due to this force.

The thermal conductance (reciprocal of the thermal resistance) for axial flow of a truncated cone of length l is πK(r1r2)ln2. If the radius at the two ends of the cone are r1 and r2 and thermal conductivity of the material is K, then the value of n2 is

Consider the ground state of Cr atom (Z = 24). The number of electrons with the azimuthal quantum numbers, I = 1 and 2 are, respectively

A man holds a spherical shaving mirror of radius of curvature 60 cm, and focal length 30 cm, a t a distance of 15 cm, from his nose. Find the position of image, and calculate the magnification.

An object is placed at a large distance in front of a concave mirror of radius of curvature 40 cm. The image will be formed in front of the mirror at a distance of : ( (a) 20 cm (b) 30 cm c) 40 cm (d) 50 cm

The cause of refraction of light is

Which of the following statements is true/correct

A current will not flow in the absence of?

From the options given below, identify the environment related problems that are caused by the construction of large dams.

If the magnification has a positive sign, the image formed by the concave mirror must be

The frequency of power supply used in India is _____ Hz.

A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 40 cm. Calculate the : (a) Power of each lens (b) Power of resulted lens (c) Nature of resulted lens (d) Focal length of the resulted lens [5 MARKS]

Find equivalent resistance between A & B in the circuit is