16569 + Interview Questions in Physics Page 37 InterviewSolution

1801.	A beam of alpha particles enters a chamber moving along the magnetic field. The force acting on them is
Answer» A beam of alpha particles enters a chamber moving along the magnetic field. The force acting on them is

Discussion

1802.	Which of the following is/are correctly paired?
Answer» Which of the following is/are correctly paired?

1802.

Which of the following is/are correctly paired?

Answer»

Which of the following is/are correctly paired?

Discussion

1803.	Cuberoot of 8 is
Answer» Cuberoot of 8 is

Discussion

1804.	When a travelling wave is reflected at a rigid boundary the reflected wave has ______, but reflection at an open boundary has ________.
Answer» When a travelling wave is reflected at a rigid boundary the reflected wave has ______, but reflection at an open boundary has ________.

Discussion

1805.	The device which is used to measure electric current through a circuit is called a/an ____.
Answer» The device which is used to measure electric current through a circuit is called a/an ____.

Discussion

1806.	when the rocket is horizontally moving then net force will be according to mg must be equal to normal reaction by air
Answer» when the rocket is horizontally moving then net force will be according to mg must be equal to normal reaction by air

Discussion

1807.	The equiconvex lens has focal length f. If it is cut perpendicular to the principal axis passing through optical centre, then focal length of each half is
Answer» The equiconvex lens has focal length f. If it is cut perpendicular to the principal axis passing through optical centre, then focal length of each half is

Discussion

1808.	∫{sin(lnx)+cos(lnx)}dx is equal to
Answer» $\int {sin (ln x) + cos (ln x)} d x$ is equal to

Discussion

1809.	what is mucons and pion
Answer» what is mucons and pion

Discussion

1810.	A ball of mass 2 kg is dropped from the top of a building of height 20 m. Calculate the mechanical energy of the ball and kinetic energy of the ball when it reaches the ground. Take g = 10 ms−2
Answer» A ball of mass 2 kg is dropped from the top of a building of height 20 m. Calculate the mechanical energy of the ball and kinetic energy of the ball when it reaches the ground. Take g = 10 ms $^{- 2}$

Discussion

1811.	A 200 bus power system has 160 PQ buses. To obtain the load flow solution by using Newton Raphson method in polar coordinates, the minimum number of simultaneous equations to be solved is _______.359
Answer» A 200 bus power system has 160 PQ buses. To obtain the load flow solution by using Newton Raphson method in polar coordinates, the minimum number of simultaneous equations to be solved is _______. 359

Discussion

1812.	24. Two identical coaxial coils P and Q carrying equal amount of current in the same direction are brought nearer. The current in (a)P increases while in Q decreases (b)Q increases while in P decreases (c)both P and Q increases (d) both Pand Q decreases
Answer» 24. Two identical coaxial coils P and Q carrying equal amount of current in the same direction are brought nearer. The current in (a)P increases while in Q decreases (b)Q increases while in P decreases (c)both P and Q increases (d) both Pand Q decreases

Discussion

1813.	two optical media of refractive indices mu1 and mu2 contain x and y number of waves in the same thickness. Their relative refractive index mu1/mu2 is equal to-
Answer» two optical media of refractive indices mu1 and mu2 contain x and y number of waves in the same thickness. Their relative refractive index mu1/mu2 is equal to-

Discussion

1814.	The work done by a force F during a displacement r is given by F. r. Suppose a force of 12 N acts on a particle in vertically upward direction and the particle is displaced through direction. Find the work done by the force during this displacement.
Answer» The work done by a force F during a displacement r is given by F. r. Suppose a force of 12 N acts on a particle in vertically upward direction and the particle is displaced through direction. Find the work done by the force during this displacement.

Discussion

1815.	The value of energy equivalent of 4 atomic mass unit (a.m.u) in MeV will be
Answer» The value of energy equivalent of $4$ atomic mass unit (a.m.u) in $MeV$ will be

Discussion

1816.	How does the resistance of a wire change when (i) its length is tripled? (ii) its diameter is tripled? (ii) its material is chanaged to one whose resistivity is three times?
Answer» How does the resistance of a wire change when (i) its length is tripled? (ii) its diameter is tripled? (ii) its material is chanaged to one whose resistivity is three times?

Discussion

1817.	Calculate the effective potential difference for the cells in series given below.
Answer» Calculate the effective potential difference for the cells in series given below.

Discussion

1818.	When a current carrying conductor is placed next to a fixed bar magnet, it experiences a force:
Answer» When a current carrying conductor is placed next to a fixed bar magnet, it experiences a force:

Discussion

1819.	Two circular coils, having identical self inductance L, are placed parallel to each other with their centers along a common axis. For which given values of distance between their centers, will the value of coupling constant be maximum?
Answer» Two circular coils, having identical self inductance $L$ , are placed parallel to each other with their centers along a common axis. For which given values of distance between their centers, will the value of coupling constant be maximum?

Discussion

1820.	A long cylindrical dielectric rod of radius r and length l (l>>r) carrying uniform charge of surface charge density sigma on its curved surface is rotating with a constant angular velocity omega. About its own axis. Find magnetic induction at the centre of the rod. Relative magnetic permeability of the material of the rod is u( read as Miu).
Answer» A long cylindrical dielectric rod of radius r and length l (l>>r) carrying uniform charge of surface charge density sigma on its curved surface is rotating with a constant angular velocity omega. About its own axis. Find magnetic induction at the centre of the rod. Relative magnetic permeability of the material of the rod is u( read as Miu).

Discussion

1821.	A beam of light of wavelength 600 nm from a distant source, falls on a single slit 1.00 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringe, on either side of the central bright fringe is,
Answer» A beam of light of wavelength $600 nm$ from a distant source, falls on a single slit $1.00 mm$ wide and the resulting diffraction pattern is observed on a screen $2 m$ away. The distance between the first dark fringe, on either side of the central bright fringe is,

Discussion

1822.	Q. A ray of light is incident making an angle of 30° with the surface of a glass slab. If refractive index of the material of the glass is 1.5, find the speed of light in glass slab
Answer» Q. A ray of light is incident making an angle of 30° with the surface of a glass slab. If refractive index of the material of the glass is 1.5, find the speed of light in glass slab

Discussion

1823.	What is zero to the power zero?
Answer» What is zero to the power zero?

Discussion

1824.	What is the most probable radius( in pm unit) for finding the electron in He+
Answer» What is the most probable radius( in pm unit) for finding the electron in He+

Discussion

1825.	34.A-total energy is conserved in moving a satellite to higher orbit R-sum of change in potential energy and KE is same in magnitude and opposite in nature
Answer» 34.A-total energy is conserved in moving a satellite to higher orbit R-sum of change in potential energy and KE is same in magnitude and opposite in nature

Discussion

1826.	A nichrome wire of resistivity 100 μΩ cm has length 10 m and area of cross-section 0.02 cm2. If this wire is connected between the terminals of a 10 V battery, then the current flow through it is
Answer» A nichrome wire of resistivity $100 μ Ω cm$ has length $10 m$ and area of cross-section $0.02 {cm}^{2}$ . If this wire is connected between the terminals of a $10 V$ battery, then the current flow through it is

Discussion

1827.	29. Consider the reaction equilibrium A(g) + B(g) C(g)+ D(g) K = 9 If initially 2mol of each A, B, C and D is present in 1 L container. Select the correct statement,. (1) At equilibrium [C] = [D] = [A] = [B] (2) At equilibrium [C] # [D] (3) At equilibrium [C] = [D] but [A] # [C] (4) At equilibrium [C] # [D] but [A] = [B]
Answer» 29. Consider the reaction equilibrium A(g) + B(g) C(g)+ D(g) K = 9 If initially 2mol of each A, B, C and D is present in 1 L container. Select the correct statement,. (1) At equilibrium [C] = [D] = [A] = [B] (2) At equilibrium [C] # [D] (3) At equilibrium [C] = [D] but [A] # [C] (4) At equilibrium [C] # [D] but [A] = [B]

Discussion

1828.	Two wires of same material and radius have there lengths in the ratio 1:2 . If the wires are streached by the same force the strain produce in the two wires will be in the ratio
Answer» Two wires of same material and radius have there lengths in the ratio 1:2 . If the wires are streached by the same force the strain produce in the two wires will be in the ratio

Discussion

1829.	If the Earth is treated as a sphere of radius r and mass m its angular momentum about the axis of its rotation with period t is
Answer» If the Earth is treated as a sphere of radius r and mass m its angular momentum about the axis of its rotation with period t is

Discussion

1830.	How DC current converts into AC current?
Answer» How DC current converts into AC current?

Discussion

1831.	Rays from a lens are converging toward a point P, as shows in figure. How much thick glass plate having refractive index 1.6 must be located between the lens and point P, so that the image will be formed at P′?
Answer» Rays from a lens are converging toward a point $P$ , as shows in figure. How much thick glass plate having refractive index $1.6$ must be located between the lens and point $P$ , so that the image will be formed at $P^{'}$ ?

Discussion

1832.	Question 1A cell, a resistor, a key and an ammeter are arranged as shown in the circuit diagrams given below. The current recorded in the ammeter will be(a) maximum in (i)(b) maximum in (ii)(c) maximum in (iii)(d) same in all the cases
Answer» Question 1 A cell, a resistor, a key and an ammeter are arranged as shown in the circuit diagrams given below. The current recorded in the ammeter will be (a) maximum in (i) (b) maximum in (ii) (c) maximum in (iii) (d) same in all the cases

Discussion

1833.	What is the other name of the split ring used in an electric motor ?
Answer» What is the other name of the split ring used in an electric motor ?

Discussion

1834.	(a) List the factors on which the resistance of a conductor in the shape of wire depends. (b) Why are metals good conductors of electricity whereas glass is a bad conductor of electricity ? Give reason. (c) Why are alloys commonly used in electrical heating devices ? Give reason.
Answer» (a) List the factors on which the resistance of a conductor in the shape of wire depends. (b) Why are metals good conductors of electricity whereas glass is a bad conductor of electricity ? Give reason. (c) Why are alloys commonly used in electrical heating devices ? Give reason.

Discussion

1835.	A convex lens A of focal length 4 m and a concave lens B of focal length 1 m are kept along the same axis with a distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then d in m is equal to:
Answer» A convex lens A of focal length 4 m and a concave lens B of focal length 1 m are kept along the same axis with a distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then d in m is equal to:

Discussion

1836.	Why the crystalline lens of people at old age become milky?
Answer» Why the crystalline lens of people at old age become milky?

Discussion

1837.	Question 6Which one of the following is not the unit of energy?(a) joule(b) newton metre(c) kilowatt(d) kilowatt hour
Answer» Question 6 Which one of the following is not the unit of energy? (a) joule (b) newton metre (c) kilowatt (d) kilowatt hour

Discussion

1838.	Why is the angle of emergence equal to the angle of incidence in a rectangular glass slab but not in a triangular glass prism?
Answer» Why is the angle of emergence equal to the angle of incidence in a rectangular glass slab but not in a triangular glass prism?

Discussion

1839.	Question 1 State the universal law of gravitation.
Answer» Question 1 State the universal law of gravitation.

Discussion

1840.	What is meant by the power of a lens? What is one dioptre?
Answer» What is meant by the power of a lens? What is one dioptre?

Discussion

1841.	Find the unit digit of 544 raised to the power 123 - 556 raised to the power 125
Answer» Find the unit digit of 544 raised to the power 123 - 556 raised to the power 125

Discussion

1842.	A bar magnet was brought closer to another bar magnet's head. It was observed that they repel each other. What are the possible poles of point 1 and point 2?
Answer» A bar magnet was brought closer to another bar magnet's head. It was observed that they repel each other. What are the possible poles of point 1 and point 2?

1842.

A bar magnet was brought closer to another bar magnet's head. It was observed that they repel each other. What are the possible poles of point 1 and point 2?

Answer»

A bar magnet was brought closer to another bar magnet's head. It was observed that they repel each other. What are the possible poles of point 1 and point 2?

Discussion

1843.	Case study (2)In the circuit shown in the figure, four capacitors are connected to a battery. (i)The equivalent capacitance of the circuit is
Answer» Case study $(2)$ In the circuit shown in the figure, four capacitors are connected to a battery. $(i)$ The equivalent capacitance of the circuit is

Discussion

1844.

Fill in the blanks for convex lens. f (m) 0.2 … 0.1 P (D) … 2 … h1 … 5 10 h2 −30 −20 … M −2 … −0.5

Answer»

Fill in the blanks for convex lens.

f (m)	0.2	…	0.1
P (D)	…	2	…
h₁	…	5	10
h₂	−30	−20	…
M	−2	…	−0.5

Discussion

1845.	The time period of artificial satellite in a circular orbit of radius R in 2days and its orbital velocity is Vo. If time period of another satellite in circular orbit is 16days then. What is the radius and orbital velocity?
Answer» The time period of artificial satellite in a circular orbit of radius R in 2days and its orbital velocity is Vo. If time period of another satellite in circular orbit is 16days then. What is the radius and orbital velocity?

Discussion

1846.	Describe nuclear fission reaction
Answer» Describe nuclear fission reaction

Discussion

1847.	organ pipe has length L The air in it is in second overtone with maximum amplitudeA.The amplitude at a dis†an ce 2(L÷5) from closed end of the pipe is(1) Zero 2)0.5A 3)A 4)0.7071A
Answer» organ pipe has length L The air in it is in second overtone with maximum amplitudeA.The amplitude at a dis†an ce 2(L÷5) from closed end of the pipe is(1) Zero 2)0.5A 3)A 4)0.7071A

Discussion

1848.	An object is placed at a distance of 4 cm from a concave lens of focal length 12 cm. Find the position of the image.
Answer» An object is placed at a distance of 4 cm from a concave lens of focal length 12 cm. Find the position of the image.

Discussion

1849.	The ratio of thickness of plates of two transparent media A & B is 6:4. If light takes equal time in passing through them, then refractive index of B with respect to A will be :
Answer» The ratio of thickness of plates of two transparent media $A$ & $B$ is $6 : 4$ . If light takes equal time in passing through them, then refractive index of $B$ with respect to $A$ will be :

Discussion

1850.	A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R′, then the ratio RR′ is:
Answer» A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is $R^{^{'}}$ , then the ratio $\frac{R}{R^{^{'}}}$ is:

Discussion

Explore topic-wise InterviewSolutions in .

A beam of alpha particles enters a chamber moving along the magnetic field. The force acting on them is

Which of the following is/are correctly paired?

Cuberoot of 8 is

When a travelling wave is reflected at a rigid boundary the reflected wave has ______, but reflection at an open boundary has ________.

The device which is used to measure electric current through a circuit is called a/an ____.

when the rocket is horizontally moving then net force will be according to mg must be equal to normal reaction by air

The equiconvex lens has focal length f. If it is cut perpendicular to the principal axis passing through optical centre, then focal length of each half is

∫{sin(lnx)+cos(lnx)}dx is equal to

what is mucons and pion

A ball of mass 2 kg is dropped from the top of a building of height 20 m. Calculate the mechanical energy of the ball and kinetic energy of the ball when it reaches the ground. Take g = 10 ms−2

A 200 bus power system has 160 PQ buses. To obtain the load flow solution by using Newton Raphson method in polar coordinates, the minimum number of simultaneous equations to be solved is _______.359

24. Two identical coaxial coils P and Q carrying equal amount of current in the same direction are brought nearer. The current in (a)P increases while in Q decreases (b)Q increases while in P decreases (c)both P and Q increases (d) both Pand Q decreases

two optical media of refractive indices mu1 and mu2 contain x and y number of waves in the same thickness. Their relative refractive index mu1/mu2 is equal to-

The work done by a force F during a displacement r is given by F. r. Suppose a force of 12 N acts on a particle in vertically upward direction and the particle is displaced through direction. Find the work done by the force during this displacement.

The value of energy equivalent of 4 atomic mass unit (a.m.u) in MeV will be

How does the resistance of a wire change when (i) its length is tripled? (ii) its diameter is tripled? (ii) its material is chanaged to one whose resistivity is three times?

Calculate the effective potential difference for the cells in series given below.

When a current carrying conductor is placed next to a fixed bar magnet, it experiences a force:

Two circular coils, having identical self inductance L, are placed parallel to each other with their centers along a common axis. For which given values of distance between their centers, will the value of coupling constant be maximum?

A beam of light of wavelength 600 nm from a distant source, falls on a single slit 1.00 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringe, on either side of the central bright fringe is,

Q. A ray of light is incident making an angle of 30° with the surface of a glass slab. If refractive index of the material of the glass is 1.5, find the speed of light in glass slab

What is zero to the power zero?

What is the most probable radius( in pm unit) for finding the electron in He+

34.A-total energy is conserved in moving a satellite to higher orbit R-sum of change in potential energy and KE is same in magnitude and opposite in nature

A nichrome wire of resistivity 100 μΩ cm has length 10 m and area of cross-section 0.02 cm2. If this wire is connected between the terminals of a 10 V battery, then the current flow through it is

Two wires of same material and radius have there lengths in the ratio 1:2 . If the wires are streached by the same force the strain produce in the two wires will be in the ratio

If the Earth is treated as a sphere of radius r and mass m its angular momentum about the axis of its rotation with period t is

How DC current converts into AC current?

Rays from a lens are converging toward a point P, as shows in figure. How much thick glass plate having refractive index 1.6 must be located between the lens and point P, so that the image will be formed at P′?

Question 1A cell, a resistor, a key and an ammeter are arranged as shown in the circuit diagrams given below. The current recorded in the ammeter will be(a) maximum in (i)(b) maximum in (ii)(c) maximum in (iii)(d) same in all the cases

What is the other name of the split ring used in an electric motor ?

(a) List the factors on which the resistance of a conductor in the shape of wire depends. (b) Why are metals good conductors of electricity whereas glass is a bad conductor of electricity ? Give reason. (c) Why are alloys commonly used in electrical heating devices ? Give reason.

A convex lens A of focal length 4 m and a concave lens B of focal length 1 m are kept along the same axis with a distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then d in m is equal to:

Why the crystalline lens of people at old age become milky?

Question 6Which one of the following is not the unit of energy?(a) joule(b) newton metre(c) kilowatt(d) kilowatt hour

Why is the angle of emergence equal to the angle of incidence in a rectangular glass slab but not in a triangular glass prism?

Question 1 State the universal law of gravitation.

What is meant by the power of a lens? What is one dioptre?

Find the unit digit of 544 raised to the power 123 - 556 raised to the power 125

A bar magnet was brought closer to another bar magnet's head. It was observed that they repel each other. What are the possible poles of point 1 and point 2?

Case study (2)In the circuit shown in the figure, four capacitors are connected to a battery. (i)The equivalent capacitance of the circuit is

Fill in the blanks for convex lens. f (m) 0.2 … 0.1 P (D) … 2 … h1 … 5 10 h2 −30 −20 … M −2 … −0.5

The time period of artificial satellite in a circular orbit of radius R in 2days and its orbital velocity is Vo. If time period of another satellite in circular orbit is 16days then. What is the radius and orbital velocity?

Describe nuclear fission reaction

organ pipe has length L The air in it is in second overtone with maximum amplitudeA.The amplitude at a dis†an ce 2(L÷5) from closed end of the pipe is(1) Zero 2)0.5A 3)A 4)0.7071A

An object is placed at a distance of 4 cm from a concave lens of focal length 12 cm. Find the position of the image.

The ratio of thickness of plates of two transparent media A &amp; B is 6:4. If light takes equal time in passing through them, then refractive index of B with respect to A will be :

A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R′, then the ratio RR′ is:

When a travelling wave is reflected at a rigid boundary the reflected wave has , but reflection at an open boundary has __.

The ratio of thickness of plates of two transparent media A & B is 6:4. If light takes equal time in passing through them, then refractive index of B with respect to A will be :