16569 + Interview Questions in Physics

1.	A small square loop of wire of side l is placed inside a large circular loops of radius r the loop are coplanar and their coincide the mutual induc†an ce of the system is proportional to
Answer» A small square loop of wire of side l is placed inside a large circular loops of radius r the loop are coplanar and their coincide the mutual induc†an ce of the system is proportional to

Discussion

2.	Explain dispersion without deviation.
Answer» Explain dispersion without deviation.

Discussion

3.	What are the cause of refraction
Answer» What are the cause of refraction

Discussion

4.	Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure potential difference across the 12 Ω resistor. What would be the readings in the ammeter and the voltmeter?
Answer» Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure potential difference across the 12 Ω resistor. What would be the readings in the ammeter and the voltmeter?

Discussion

5.	If momentum of an object is increased by 10%then its kinectic energy will increase by what
Answer» If momentum of an object is increased by 10%then its kinectic energy will increase by what

Discussion

6.	a dichromatic light of wavelength 5600A and 6300A pass through a prism of crown glass. then compare the deviation of both the lights
Answer» a dichromatic light of wavelength 5600A and 6300A pass through a prism of crown glass. then compare the deviation of both the lights

Discussion

7.	Given curves show electric field intensity due to a point charge (E) at a distance (x) from it.Here graphs(A,B,C,D) corresponding to four charges are shown. Which graph represents the charge of higher magnitude?
Answer» Given curves show electric field intensity due to a point charge $(E)$ at a distance $(x)$ from it. Here graphs $(A, B, C, D)$ corresponding to four charges are shown. Which graph represents the charge of higher magnitude?

Discussion

8.	What Will be the resistivity of a metal wire of 2 m length and 0.6 mm in diameter if the resistance of the wire is 50 ohm?
Answer» What Will be the resistivity of a metal wire of 2 m length and 0.6 mm in diameter if the resistance of the wire is 50 ohm?

Discussion

9.	For a concave mirror, if an object is lying at infinity then image will be formed at:
Answer» For a concave mirror, if an object is lying at infinity then image will be formed at:

Discussion

10.	39.Calculate the rms and mean value of current for a square or rectangular waveform.
Answer» 39.Calculate the rms and mean value of current for a square or rectangular waveform.

Discussion

11.	What are some safety precautions that we can follow to avoid electric shocks and fires?
Answer» What are some safety precautions that we can follow to avoid electric shocks and fires?

Discussion

12.	Current through a conductor is 2 A. Find the time for which a charge of 100 C flows.
Answer» Current through a conductor is $2 A$ . Find the time for which a charge of $100 C$ flows.

Discussion

13.	Formula for coulomb law?
Answer» Formula for coulomb law?

Discussion

14.	Electrons of mass m with de-Broglie wavelength fall on the target in an X-ray tube. The cutof wavelength (ho) of the emitted X-ray is :-(z(2) 0 = 2h (4) ,-me 2mcx2 do not consider brackettvv written by mistake)
Answer» Electrons of mass m with de-Broglie wavelength fall on the target in an X-ray tube. The cutof wavelength (ho) of the emitted X-ray is :-(z(2) 0 = 2h (4) ,-me 2mcx2 do not consider brackettvv written by mistake)

Discussion

15.	why d subshell of f block in the periodic table have 0 or 1 electron?
Answer» why d subshell of f block in the periodic table have 0 or 1 electron?

Discussion

16.	Presbyopia is due to the diminishing ability of:
Answer» Presbyopia is due to the diminishing ability of:

Discussion

17.	a wire of linear charge density λ passes through a cuboid of length l and breadth b and height h in such a manner that flux through the cuboid is maximum. the position of wire now changed. so that the flux through the cuboid is minimum. l>b>h then the ratio of maximum flux to minimum flux will be ?
Answer» a wire of linear charge density λ passes through a cuboid of length l and breadth b and height h in such a manner that flux through the cuboid is maximum. the position of wire now changed. so that the flux through the cuboid is minimum. l>b>h then the ratio of maximum flux to minimum flux will be ?

Discussion

18.	What do you think electrical energy actually is? For what do you pay your electricity bill?
Answer» What do you think electrical energy actually is? For what do you pay your electricity bill?

Discussion

19.	Consider the following four circuits P, Q, R and S which have been set up to find the resultant resistance of two resistors combined in parallel:The correct way of connecting the ammeter and voltmeter in the circuit is:(1) P(2) Q(3) R(4) S
Answer» Consider the following four circuits P, Q, R and S which have been set up to find the resultant resistance of two resistors combined in parallel: The correct way of connecting the ammeter and voltmeter in the circuit is: (1) P (2) Q (3) R (4) S

Discussion

20.	1. Electric field intensity due to linear charge distribution at broad on position?
Answer» 1. Electric field intensity due to linear charge distribution at broad on position?

Discussion

21.	(a) Name the three connecting wires used in a household circuit. (b) Which of the two wires mentioned in part (a) are at the same potential? (c) In which of the wire stated in part (a), the switch is connected?
Answer» (a) Name the three connecting wires used in a household circuit. (b) Which of the two wires mentioned in part (a) are at the same potential? (c) In which of the wire stated in part (a), the switch is connected?

21.

(a) Name the three connecting wires used in a household circuit. (b) Which of the two wires mentioned in part (a) are at the same potential? (c) In which of the wire stated in part (a), the switch is connected?

Answer»

(a) Name the three connecting wires used in a household circuit.

(b) Which of the two wires mentioned in part (a) are at the same potential?

(c) In which of the wire stated in part (a), the switch is connected?

Discussion

22.	Identify the type of substance from the given images.
Answer» Identify the type of substance from the given images.

Discussion

23.	The sky appears dark to passengers flying at a very high altitude. Why?
Answer» The sky appears dark to passengers flying at a very high altitude. Why?

Discussion

24.	Range of vision for a normal human eye is:
Answer» Range of vision for a normal human eye is:

Discussion

25.	In pairs discuss the following questions: (a) When do you generally use a mirror? (b) Is a mirror essential for us? (c) Given below is a list of possible reasons why a person uses a mirror. Tick the ones you agree with: (i) to check one's appearance (ii) to look beautiful (iii) to make sure one is neat and tidy before going out (iv) to check for a pimple or grey hair (v) to apply make-up (vi) to make a phone call (vii) as a decorative item at home
Answer» In pairs discuss the following questions: (a) When do you generally use a mirror? (b) Is a mirror essential for us? (c) Given below is a list of possible reasons why a person uses a mirror. Tick the ones you agree with: (i) to check one's appearance (ii) to look beautiful (iii) to make sure one is neat and tidy before going out (iv) to check for a pimple or grey hair (v) to apply make-up (vi) to make a phone call (vii) as a decorative item at home

25.

In pairs discuss the following questions: (a) When do you generally use a mirror? (b) Is a mirror essential for us? (c) Given below is a list of possible reasons why a person uses a mirror. Tick the ones you agree with: (i) to check one's appearance (ii) to look beautiful (iii) to make sure one is neat and tidy before going out (iv) to check for a pimple or grey hair (v) to apply make-up (vi) to make a phone call (vii) as a decorative item at home

Answer»

In
pairs discuss the following questions:

(a)
When do you generally use a mirror?

(b)
Is a mirror essential for us?

(c)
Given below is a list of possible reasons why a person uses a mirror.
Tick the ones you agree with:

(i)
to check one's appearance

(ii)
to look beautiful

(iii)
to make sure one is neat and tidy before going out

(iv)
to check for a pimple or grey hair

(v)
to apply make-up

(vi)
to make a phone call

(vii)
as a decorative item at home

Discussion

26.	What causes magnetism?
Answer» What causes magnetism?

Discussion

27.	Three resistances 2 ohm, 3 ohm and 4 ohm are connected in parallel. The ratio of currents passing through them when a potential difference is applied across its ends ?
Answer» Three resistances 2 ohm, 3 ohm and 4 ohm are connected in parallel. The ratio of currents passing through them when a potential difference is applied across its ends ?

Discussion

28.	A current is passed through a straight wire. Then the shape of lines of forces established around it is ?
Answer» A current is passed through a straight wire. Then the shape of lines of forces established around it is ?

Discussion

29.	A positively charged alpha particle projected towards west is deflected towards north by a magnetic field . Find out the direction of the magnetic field . Also state the rule which is used to find the direction of magnetic field in such case
Answer» A positively charged alpha particle projected towards west is deflected towards north by a magnetic field . Find out the direction of the magnetic field . Also state the rule which is used to find the direction of magnetic field in such case

Discussion

30.	A fruit is dropped from a height of 20 m. Find the velocity with which it would hit the ground.
Answer» A fruit is dropped from a height of 20 m. Find the velocity with which it would hit the ground.

Discussion

31.	if b,k are the intercept of a focal chord of the parabola y²=4ax, then a is equal to
Answer» if b,k are the intercept of a focal chord of the parabola y²=4ax, then a is equal to

Discussion

32.	What do you understand by refraction of light?
Answer» What do you understand by refraction of light?

Discussion

33.	ntA person stands in contact against inner wall of a rotor of radius r , coeffecient of friction between wall and clothing is 'meu' and rotor is rotating about verticle axis . The minimum speed of rotor so that person does not slip downward is ?n
Answer» ntA person stands in contact against inner wall of a rotor of radius r , coeffecient of friction between wall and clothing is 'meu' and rotor is rotating about verticle axis . The minimum speed of rotor so that person does not slip downward is ?n

Discussion

34.	The frequency of the sound emitted by the loudspeaker is 1020 Hz. Calculate the wavelength of the sound wave in air in cm where its velocity is 340 m/s.
Answer» The frequency of the sound emitted by the loudspeaker is 1020 Hz. Calculate the wavelength of the sound wave in air in cm where its velocity is 340 m/s.

Discussion

35.	What is the impact of changing the charge (Q) in the expirament performed by Ohm
Answer» What is the impact of changing the charge (Q) in the expirament performed by Ohm

Discussion

36.	Which of the following options are true regarding thermal conductivity?
Answer» Which of the following options are true regarding thermal conductivity?

Discussion

37.	An object 3 cm high is placed at a distance of 10 cm in front of a converging mirror of focal length 20 cm. Find the position, nature and size of the image formed.
Answer» An object 3 cm high is placed at a distance of 10 cm in front of a converging mirror of focal length 20 cm. Find the position, nature and size of the image formed.

Discussion

38.	A Convex Lens Of Focal Length F Is Cut Into Two Identical Parts Each Forming A Plano Convex Lens.What Is The Focal Length Of Each Part?
Answer» A Convex Lens Of Focal Length F Is Cut Into Two Identical Parts Each Forming A Plano Convex Lens.What Is The Focal Length Of Each Part?

Discussion

39.	Question 8 Given below are a few statements related to biodiversity. Pick those that correctly describe the concept of biodiversity (i) Biodiversity refers to the different species of flora and fauna present in an area (ii) Biodiversity refers to only the flora of a given area (iii) Biodiversity is greater in a forest (iv) Biodiversity refers to the total number of individuals of a particular species living in an area. (a) (i) and (ii) (b) (ii) and (iv) (c) (i) and (iii) (d) (ii) and (iii)
Answer» Question 8 Given below are a few statements related to biodiversity. Pick those that correctly describe the concept of biodiversity (i) Biodiversity refers to the different species of flora and fauna present in an area (ii) Biodiversity refers to only the flora of a given area (iii) Biodiversity is greater in a forest (iv) Biodiversity refers to the total number of individuals of a particular species living in an area. (a) (i) and (ii) (b) (ii) and (iv) (c) (i) and (iii) (d) (ii) and (iii)

Discussion

40.	Find the amount of energy released in kWh when 1 g of Uranium atoms 92U235 (235.0439 amu) undergoes fission by slow neutron (1.0087 amu) and is split into Krypton 36Kr92 (91.8973 amu) and Barium 56Br141 (140.9139 amu) (assuming no energy is lost).[1amu c2=931.5 MeV].
Answer» Find the amount of energy released in $kWh$ when $1 g$ of Uranium atoms $_{92} U^{235} (235.0439$ $amu)$ undergoes fission by slow neutron $(1.0087 amu)$ and is split into Krypton $_{36} K r^{92} (91.8973 amu)$ and Barium $_{56} B r^{141} (140.9139 amu)$ (assuming no energy is lost). $[1 amu c^{2} = 931.5 MeV]$ .

Discussion

41.	The refracting angle of a prism is A, and refractive index of the material of the prism is cot(A/2).The angle of minimum deviation i
Answer» The refracting angle of a prism is A, and refractive index of the material of the prism is cot(A/2).The angle of minimum deviation i

Discussion

42.	two small and heavy spheres, each of mass M, are placed a distance r apart on a horizontal surface.The gravitational potential at the mid-point on the line joining the centre of the spheres is
Answer» two small and heavy spheres, each of mass M, are placed a distance r apart on a horizontal surface.The gravitational potential at the mid-point on the line joining the centre of the spheres is

Discussion

43.	An object 5 cm high is placed at a distance 60 cm in front of a concave mirror of a focal length 10 cm.find the position and the size?
Answer» An object 5 cm high is placed at a distance 60 cm in front of a concave mirror of a focal length 10 cm.find the position and the size?

Discussion

44.	In the figure QR is a vertical conductor and the current I flows from R to Q. P is a point on the horizontalplane and is to the south of the wire. The direction of the magnetic field at P due to the current will be towards:
Answer» In the figure QR is a vertical conductor and the current I flows from R to Q. P is a point on the horizontal plane and is to the south of the wire. The direction of the magnetic field at P due to the current will be towards:

44.

In the figure QR is a vertical conductor and the current I flows from R to Q. P is a point on the horizontalplane and is to the south of the wire. The direction of the magnetic field at P due to the current will be towards:

Answer»

In the figure QR is a vertical conductor and the current I flows from R to Q. P is a point on the horizontal

plane and is to the south of the wire. The direction of the magnetic field at P due to the current will be towards:

Discussion

45.	16. One fourth length of a uniform rod of length 2l and mass m is placed on a horizontal table and the rod is held horizontal. The rod is released from rest. The normal reaction on the road as soon as the rod is released is xmg/31. Find the value of x.
Answer» 16. One fourth length of a uniform rod of length 2l and mass m is placed on a horizontal table and the rod is held horizontal. The rod is released from rest. The normal reaction on the road as soon as the rod is released is xmg/31. Find the value of x.

Discussion

46.	Would it be right to ask someone to prove the law of conservation of energy?
Answer» Would it be right to ask someone to prove the law of conservation of energy?

Discussion

47.	About _________ million km3 of the area of the entire globe consists of water.
Answer» About _________ million $k m^{3}$ of the area of the entire globe consists of water.

Discussion

48.	A charge of 2×10−2 C moves at 30 revolutions per second in a circle of diameter 80 cm. The current linked with the circuit is __________ A.
Answer» A charge of $2 \times 10^{- 2}$ C moves at 30 revolutions per second in a circle of diameter 80 cm. The current linked with the circuit is __________ A.

Discussion

49.	A body is projected up a 45 degree Rough incline. If the coefficient of friction is 0.5 then retardation of the block is?
Answer» A body is projected up a 45 degree Rough incline. If the coefficient of friction is 0.5 then retardation of the block is?

Discussion

50.	An electron beam of energy '10KeV' is incident onmetallic foil. If the interatomic distance is 0.2454Athen find the angle of diffaction (150 12.27(1) 30^° (2) 20^° (3) 450 (4) 60
Answer» An electron beam of energy '10KeV' is incident onmetallic foil. If the interatomic distance is 0.2454Athen find the angle of diffaction (150 12.27(1) 30^° (2) 20^° (3) 450 (4) 60

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A small square loop of wire of side l is placed inside a large circular loops of radius r the loop are coplanar and their coincide the mutual induc†an ce of the system is proportional to

Explain dispersion without deviation.

What are the cause of refraction

Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure potential difference across the 12 Ω resistor. What would be the readings in the ammeter and the voltmeter?

If momentum of an object is increased by 10%then its kinectic energy will increase by what

a dichromatic light of wavelength 5600A and 6300A pass through a prism of crown glass. then compare the deviation of both the lights

Given curves show electric field intensity due to a point charge (E) at a distance (x) from it.Here graphs(A,B,C,D) corresponding to four charges are shown. Which graph represents the charge of higher magnitude?

What Will be the resistivity of a metal wire of 2 m length and 0.6 mm in diameter if the resistance of the wire is 50 ohm?

For a concave mirror, if an object is lying at infinity then image will be formed at:

39.Calculate the rms and mean value of current for a square or rectangular waveform.

What are some safety precautions that we can follow to avoid electric shocks and fires?

Current through a conductor is 2 A. Find the time for which a charge of 100 C flows.

Formula for coulomb law?

Electrons of mass m with de-Broglie wavelength fall on the target in an X-ray tube. The cutof wavelength (ho) of the emitted X-ray is :-(z(2) 0 = 2h (4) ,-me 2mcx2 do not consider brackettvv written by mistake)

why d subshell of f block in the periodic table have 0 or 1 electron?

Presbyopia is due to the diminishing ability of:

What do you think electrical energy actually is? For what do you pay your electricity bill?

Consider the following four circuits P, Q, R and S which have been set up to find the resultant resistance of two resistors combined in parallel:The correct way of connecting the ammeter and voltmeter in the circuit is:(1) P(2) Q(3) R(4) S

1. Electric field intensity due to linear charge distribution at broad on position?

(a) Name the three connecting wires used in a household circuit. (b) Which of the two wires mentioned in part (a) are at the same potential? (c) In which of the wire stated in part (a), the switch is connected?

Identify the type of substance from the given images.

The sky appears dark to passengers flying at a very high altitude. Why?

Range of vision for a normal human eye is:

What causes magnetism?

Three resistances 2 ohm, 3 ohm and 4 ohm are connected in parallel. The ratio of currents passing through them when a potential difference is applied across its ends ?

A current is passed through a straight wire. Then the shape of lines of forces established around it is ?

A positively charged alpha particle projected towards west is deflected towards north by a magnetic field . Find out the direction of the magnetic field . Also state the rule which is used to find the direction of magnetic field in such case

A fruit is dropped from a height of 20 m. Find the velocity with which it would hit the ground.

if b,k are the intercept of a focal chord of the parabola y²=4ax, then a is equal to

What do you understand by refraction of light?

ntA person stands in contact against inner wall of a rotor of radius r , coeffecient of friction between wall and clothing is 'meu' and rotor is rotating about verticle axis . The minimum speed of rotor so that person does not slip downward is ?n

The frequency of the sound emitted by the loudspeaker is 1020 Hz. Calculate the wavelength of the sound wave in air in cm where its velocity is 340 m/s.

What is the impact of changing the charge (Q) in the expirament performed by Ohm

Which of the following options are true regarding thermal conductivity?

An object 3 cm high is placed at a distance of 10 cm in front of a converging mirror of focal length 20 cm. Find the position, nature and size of the image formed.

A Convex Lens Of Focal Length F Is Cut Into Two Identical Parts Each Forming A Plano Convex Lens.What Is The Focal Length Of Each Part?

Find the amount of energy released in kWh when 1 g of Uranium atoms 92U235 (235.0439 amu) undergoes fission by slow neutron (1.0087 amu) and is split into Krypton 36Kr92 (91.8973 amu) and Barium 56Br141 (140.9139 amu) (assuming no energy is lost).[1amu c2=931.5 MeV].

The refracting angle of a prism is A, and refractive index of the material of the prism is cot(A/2).The angle of minimum deviation i

two small and heavy spheres, each of mass M, are placed a distance r apart on a horizontal surface.The gravitational potential at the mid-point on the line joining the centre of the spheres is

An object 5 cm high is placed at a distance 60 cm in front of a concave mirror of a focal length 10 cm.find the position and the size?

In the figure QR is a vertical conductor and the current I flows from R to Q. P is a point on the horizontalplane and is to the south of the wire. The direction of the magnetic field at P due to the current will be towards:

16. One fourth length of a uniform rod of length 2l and mass m is placed on a horizontal table and the rod is held horizontal. The rod is released from rest. The normal reaction on the road as soon as the rod is released is xmg/31. Find the value of x.

Would it be right to ask someone to prove the law of conservation of energy?

About _________ million km3 of the area of the entire globe consists of water.

A charge of 2×10−2 C moves at 30 revolutions per second in a circle of diameter 80 cm. The current linked with the circuit is __________ A.

A body is projected up a 45 degree Rough incline. If the coefficient of friction is 0.5 then retardation of the block is?

An electron beam of energy '10KeV' is incident onmetallic foil. If the interatomic distance is 0.2454Athen find the angle of diffaction (150 12.27(1) 30^° (2) 20^° (3) 450 (4) 60