9478 + Interview Questions in Physics Page 42 InterviewSolution

2051.	24. DC. DE, FE, ?, HG H(1) DE(2) FG(3) GF
Answer» 24. DC. DE, FE, ?, HG H(1) DE(2) FG(3) GF

Discussion

2052.	Consider you are standing well off to one side of a straight road and the ambulance coming along the road at constant speed, the frequency that you hear decreases all the time as the ambulance approaches and goes past you. How rapidly it changes. At which stage of the motion is the rate of decrease of the frequency greatest?
Answer» Consider you are standing well off to one side of a straight road and the ambulance coming along the road at constant speed, the frequency that you hear decreases all the time as the ambulance approaches and goes past you. How rapidly it changes. At which stage of the motion is the rate of decrease of the frequency greatest?

2052.

Consider you are standing well off to one side of a straight road and the ambulance coming along the road at constant speed, the frequency that you hear decreases all the time as the ambulance approaches and goes past you. How rapidly it changes. At which stage of the motion is the rate of decrease of the frequency greatest?

Answer»

Consider you are standing well off to one side of a straight road and the ambulance coming along the road at constant speed, the frequency that you hear decreases all the time as the ambulance approaches and goes past you. How rapidly it changes. At which stage of the motion is the rate of decrease of the frequency greatest?

Discussion

2053.	The dimensional formula for a physical quantity X is (M−1L3T−2]. The errors in measuring the quantities M, L and T, are 2%, 3%, and 4% respectively. The maximum percentage of error that occurs in measuring the quantity X is
Answer» The dimensional formula for a physical quantity $X$ is $(M^{- 1} L^{3} T^{- 2}]$ . The errors in measuring the quantities $M$ , $L$ and $T$ , are 2%, 3%, and 4% respectively. The maximum percentage of error that occurs in measuring the quantity $X$ is

Discussion

2054.	F(x)=sinx+cos2x+tan3x. Find period of F(x)
Answer» F(x)=sinx+cos2x+tan3x. Find period of F(x)

Discussion

2055.	Are the laws of reflection followed when irregular reflection takes place?
Answer» Are the laws of reflection followed when irregular reflection takes place?

Discussion

2056.	What are the three ways in which a body can be charged?
Answer» What are the three ways in which a body can be charged?

Discussion

2057.	Two cars A and B with a mass of 5 kg and 10 kg and initial velocities of 10 ms−1 and 5 ms−1 are racing. Which car exerts more power before coming to rest? (Time taken for both cars to complete the race is 10 seconds):
Answer» Two cars A and B with a mass of 5 kg and 10 kg and initial velocities of $10 m s^{- 1}$ and $5 m s^{- 1}$ are racing. Which car exerts more power before coming to rest? (Time taken for both cars to complete the race is 10 seconds):

Discussion

2058.	Question 18A chapati maker is a machine which converts balls of dough into chapatis. What effect of force comes into play in this process?
Answer» Question 18 A chapati maker is a machine which converts balls of dough into chapatis. What effect of force comes into play in this process?

Discussion

2059.	In an experiment, a charged object attracts another object. What can be understood from this?
Answer» In an experiment, a charged object attracts another object. What can be understood from this?

Discussion

2060.	If air is bad conductor than why lightning can pass through it?
Answer» If air is bad conductor than why lightning can pass through it?

Discussion

2061.	Write a letter to the editor of a magazine describing a dance performance you have seen or an art gallery you have visited.
Answer» Write a letter to the editor of a magazine describing a dance performance you have seen or an art gallery you have visited.

Discussion

2062.	How is Loudness related to amplitude of sound and in what units it is measured? [3 MARKS]
Answer» How is Loudness related to amplitude of sound and in what units it is measured? [3 MARKS]

Discussion

2063.	If the atmospheric electric field is approximately 150 V/m and the radius of the earth is 6400 km, then the total charge of the earth is:-
Answer» If the atmospheric electric field is approximately $150 V/m$ and the radius of the earth is $6400 km$ , then the total charge of the earth is:-

Discussion

2064.	Question 2The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?(a) Between the principal focus and the centre of curvature(b) At the centre of curvature(c) Beyond the centre of curvature(d) Between the pole of the mirror and its principal focus
Answer» Question 2 The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object? (a) Between the principal focus and the centre of curvature (b) At the centre of curvature (c) Beyond the centre of curvature (d) Between the pole of the mirror and its principal focus

Discussion

2065.	In which of the following process/processes the temperature remains constant?
Answer» In which of the following process/processes the temperature remains constant?

Discussion

2066.	why is dilute sulphuric acid added copper sulphate solution instead of common salt
Answer» why is dilute sulphuric acid added copper sulphate solution instead of common salt

Discussion

2067.	What is the best method to identify the north and south poles of a bar magnet?
Answer» What is the best method to identify the north and south poles of a bar magnet?

Discussion

2068.	Which of the following words will create a readable sequence of letters upon reflection in a plane mirror?
Answer» Which of the following words will create a readable sequence of letters upon reflection in a plane mirror?

Discussion

2069.	what is a atomizer?
Answer» what is a atomizer?

Discussion

2070.	22. Consider the circuit shown in the figure. All the resistor are identical. The charge stored in the capacitor, once it is fully charged is
Answer» 22. Consider the circuit shown in the figure. All the resistor are identical. The charge stored in the capacitor, once it is fully charged is

Discussion

2071.	In each of the following cases, state which body loses electrons : (a) A glass rod when rubbed with silk. (b) An ebonite rod when rubbed with fur.
Answer» In each of the following cases, state which body loses electrons : (a) A glass rod when rubbed with silk. (b) An ebonite rod when rubbed with fur.

2071.

In each of the following cases, state which body loses electrons : (a) A glass rod when rubbed with silk. (b) An ebonite rod when rubbed with fur.

Answer»

In each of the following cases, state which body loses electrons :

(a) A glass rod when rubbed with silk.

(b) An ebonite rod when rubbed with fur.

Discussion

2072.	A force of 5 kgf is required to cut a metal sheet. A shear is used for cutting a metal sheet; its blade is 5 cm long while its handle is 10 cm long. What effort is needed to cut a sheet?
Answer» A force of 5 kgf is required to cut a metal sheet. A shear is used for cutting a metal sheet; its blade is 5 cm long while its handle is 10 cm long. What effort is needed to cut a sheet?

Discussion

2073.	What is the intensity of light?
Answer» What is the intensity of light?

Discussion

2074.	What do you mean by audible and inaudible sound?
Answer» What do you mean by audible and inaudible sound?

Discussion

2075.	Why state of thermodynamics is represented by pressure only?why it can't be volume?
Answer» Why state of thermodynamics is represented by pressure only?why it can't be volume?

Discussion

2076.	23.How are Charge Density and Basic strength related? Like if More charge density then More Basic?
Answer» 23.How are Charge Density and Basic strength related? Like if More charge density then More Basic?

Discussion

2077.	The length of a side of a square is 10 cm. What is its area in square meter?
Answer» The length of a side of a square is $10 c m$ . What is its area in square meter?

Discussion

2078.	A negatively charged rod is held close to the disc of a neutral gold leaf electroscope. What kind of charge is produced on the i) disc ii) gold leaves?
Answer» A negatively charged rod is held close to the disc of a neutral gold leaf electroscope. What kind of charge is produced on the i) disc ii) gold leaves?

Discussion

2079.	A piece of iron of density 7.8×103 kg m−3 and volume 100 cm3 is totally immersed in water (ρ = 1000 kg m−3). Calculate its apparent weight in water.
Answer» A piece of iron of density $7.8 \times 10^{3} k g m^{- 3}$ and volume 100 $c m^{3}$ is totally immersed in water ( $ρ$ = 1000 kg $m^{- 3})$ . Calculate its apparent weight in water.

Discussion

2080.	A bullet fired from a ggun experience a force of 600 - 2100000t in barrel of gun Here t is in second The force become 0 as soon as bullet leave the barrel of the gun The time which was bullet in the barrel of the gum
Answer» A bullet fired from a ggun experience a force of 600 - 2100000t in barrel of gun Here t is in second The force become 0 as soon as bullet leave the barrel of the gun The time which was bullet in the barrel of the gum

Discussion

2081.	If 50J of work must be done to move an electric charge of 2C from a point, where potential difference is -10V to another point where potential is V volt. Then the value of V is?
Answer» If 50J of work must be done to move an electric charge of 2C from a point, where potential difference is -10V to another point where potential is V volt. Then the value of V is?

Discussion

2082.	In the electrolysis of acidulated water, _______ gas is evolved at cathode.
Answer» In the electrolysis of acidulated water, _______ gas is evolved at cathode.

Discussion

2083.	a tuning fork of frequency 256Hz produces 4 beats per second ith a wire of length 25cm vibrating in fundamental mode. the beat frequency decreases when the length is slightly shortened. what could be the minimum length by which the wire be shortened so that it produces no beats with the tuning fork?
Answer» a tuning fork of frequency 256Hz produces 4 beats per second ith a wire of length 25cm vibrating in fundamental mode. the beat frequency decreases when the length is slightly shortened. what could be the minimum length by which the wire be shortened so that it produces no beats with the tuning fork?

Discussion

2084.	If the Earth was compressed to a size of a tennis ball it would collapse and turn into black hole So, is the fact wrong?
Answer» If the Earth was compressed to a size of a tennis ball it would collapse and turn into black hole So, is the fact wrong?

Discussion

2085.	If F1 is the magnitude of the force exerted on the Sun by Earth and F2 is the magnitude of the force exerted on Earth by the Sun, then:
Answer» If F₁ is the magnitude of the force exerted on the Sun by Earth and F₂ is the magnitude of the force exerted on Earth by the Sun, then:

Discussion

2086.	The radii of the axle and the wheel are increased by 3 times and 5 times respectively.The new Mechanical advantage obtain of the wheel and axle
Answer» The radii of the axle and the wheel are increased by 3 times and 5 times respectively.The new Mechanical advantage obtain of the wheel and axle

Discussion

2087.	WHAT IS meant by amplitude ,frequency and time period of a sound wave
Answer» WHAT IS meant by amplitude ,frequency and time period of a sound wave

Discussion

2088.	100ml solution of H2O2 is completely oxidised by 10ml 0.2 M KMnO4 in acidic medium.Find vol. strength of H2O2?
Answer» 100ml solution of H2O2 is completely oxidised by 10ml 0.2 M KMnO4 in acidic medium.Find vol. strength of H2O2?

Discussion

2089.	Which among these is not a part of the human eye?
Answer» Which among these is not a part of the human eye?

Discussion

2090.	From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 ms−1 . Calculate the initial recoil velocity of the rifle.
Answer» From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 m $s^{- 1}$ . Calculate the initial recoil velocity of the rifle.

Discussion

2091.	when a car undergoes acceleration its speed always increases or decreases
Answer» when a car undergoes acceleration its speed always increases or decreases

Discussion

2092.	In a reinforced concrete section, the stress at extreme fibre on compression side is 6MPa. The depth of neutral axis is 60mm. The grade of concrete and steel are M20 and Fe415 respectively. Assuming linear elastic behaviour of concrete, the effective curvature of the section (in per mm) is____×10−64.4
Answer» In a reinforced concrete section, the stress at extreme fibre on compression side is $6 M P a$ . The depth of neutral axis is $60 m m$ . The grade of concrete and steel are $M 20$ and $F e 415$ respectively. Assuming linear elastic behaviour of concrete, the effective curvature of the section (in per mm) is____ $\times 10^{- 6}$ 4.4

Discussion

2093.	How is drinking water obtained from sea water?
Answer» How is drinking water obtained from sea water?

Discussion

2094.	x^2/(x-y)(x-z)+y^3/(y-x)(y-x)+z^3/(z-x)(z-y)=x+y+zProve that LHS=RHS
Answer» x^2/(x-y)(x-z)+y^3/(y-x)(y-x)+z^3/(z-x)(z-y)=x+y+z Prove that LHS=RHS

Discussion

2095.	AB is a white light ray incident on the prism PQR as shown below. Complete the ray diagram when the light passes through it and falls on the adjacent screen.
Answer» $AB$ is a white light ray incident on the prism $PQR$ as shown below. Complete the ray diagram when the light passes through it and falls on the adjacent screen.

Discussion

2096.	44.A boy swim in a 100 m long pool.He covers 60m with a velocity of 20m/s and covers the rest of the distance with a velocity of 10m/s. Calculate the average velocity of the boy.
Answer» 44.A boy swim in a 100 m long pool.He covers 60m with a velocity of 20m/s and covers the rest of the distance with a velocity of 10m/s. Calculate the average velocity of the boy.

Discussion

2097.	Gravitational force is proportional to the product of the_____ and inversely proportional to the square of _____ between the two bodies.
Answer» Gravitational force is proportional to the product of the_____ and inversely proportional to the square of _____ between the two bodies.

Discussion

2098.	Fill in the follownig blanks with suitable words : (a) To draw water from a well, we have to ______at the rope. (b) If the two forces applied to an object are equal and act in opposite directions, the net force acting on the object will be______ (c) Force could be a ______or a______ (d) Force has magnitude as well as______ (e) A force arises due to______between two objects. (f) A charged body______an uncharged body towards.it. (g) The north pole of a magnet______the north pole of another magnet. (h) Force acting on a unit area is called______ (i) The pressure exerted by a liquid______with depth. (j) A drinking straw works on the existence of ______pressure. (k) Atmospheric pressure______with increasing height.
Answer» Fill in the follownig blanks with suitable words : (a) To draw water from a well, we have to ______at the rope. (b) If the two forces applied to an object are equal and act in opposite directions, the net force acting on the object will be______ (c) Force could be a ______or a______ (d) Force has magnitude as well as______ (e) A force arises due to______between two objects. (f) A charged body______an uncharged body towards.it. (g) The north pole of a magnet______the north pole of another magnet. (h) Force acting on a unit area is called______ (i) The pressure exerted by a liquid______with depth. (j) A drinking straw works on the existence of ______pressure. (k) Atmospheric pressure______with increasing height.

2098.

Fill in the follownig blanks with suitable words : (a) To draw water from a well, we have to at the rope. (b) If the two forces applied to an object are equal and act in opposite directions, the net force acting on the object will be (c) Force could be a or a (d) Force has magnitude as well as (e) A force arises due tobetween two objects. (f) A charged bodyan uncharged body towards.it. (g) The north pole of a magnetthe north pole of another magnet. (h) Force acting on a unit area is called (i) The pressure exerted by a liquidwith depth. (j) A drinking straw works on the existence of pressure. (k) Atmospheric pressurewith increasing height.

Answer»

Fill in the follownig blanks with suitable words :

(a) To draw water from a well, we have to ______at the rope.

(b) If the two forces applied to an object are equal and act in opposite directions, the net force acting on the object will be______

(c) Force could be a ______or a______

(d) Force has magnitude as well as______

(e) A force arises due to______between two objects.

(f) A charged body______an uncharged body towards.it.

(g) The north pole of a magnet______the north pole of another magnet.

(h) Force acting on a unit area is called______

(i) The pressure exerted by a liquid______with depth.

(j) A drinking straw works on the existence of ______pressure.

(k) Atmospheric pressure______with increasing height.

Discussion

2099.	Define orbit.
Answer» Define orbit.

Discussion

2100.	The battery is also known as source of __-------------
Answer» The battery is also known as source of __-------------

Discussion

Explore topic-wise InterviewSolutions in .

24. DC. DE, FE, ?, HG H(1) DE(2) FG(3) GF

The dimensional formula for a physical quantity X is (M−1L3T−2]. The errors in measuring the quantities M, L and T, are 2%, 3%, and 4% respectively. The maximum percentage of error that occurs in measuring the quantity X is

F(x)=sinx+cos2x+tan3x. Find period of F(x)

Are the laws of reflection followed when irregular reflection takes place?

What are the three ways in which a body can be charged?

Two cars A and B with a mass of 5 kg and 10 kg and initial velocities of 10 ms−1 and 5 ms−1 are racing. Which car exerts more power before coming to rest? (Time taken for both cars to complete the race is 10 seconds):

Question 18A chapati maker is a machine which converts balls of dough into chapatis. What effect of force comes into play in this process?

In an experiment, a charged object attracts another object. What can be understood from this?

If air is bad conductor than why lightning can pass through it?

Write a letter to the editor of a magazine describing a dance performance you have seen or an art gallery you have visited.

How is Loudness related to amplitude of sound and in what units it is measured? [3 MARKS]

If the atmospheric electric field is approximately 150 V/m and the radius of the earth is 6400 km, then the total charge of the earth is:-

In which of the following process/processes the temperature remains constant?

why is dilute sulphuric acid added copper sulphate solution instead of common salt

What is the best method to identify the north and south poles of a bar magnet?

Which of the following words will create a readable sequence of letters upon reflection in a plane mirror?

what is a atomizer?

22. Consider the circuit shown in the figure. All the resistor are identical. The charge stored in the capacitor, once it is fully charged is

In each of the following cases, state which body loses electrons : (a) A glass rod when rubbed with silk. (b) An ebonite rod when rubbed with fur.

A force of 5 kgf is required to cut a metal sheet. A shear is used for cutting a metal sheet; its blade is 5 cm long while its handle is 10 cm long. What effort is needed to cut a sheet?

What is the intensity of light?

What do you mean by audible and inaudible sound?

Why state of thermodynamics is represented by pressure only?why it can't be volume?

23.How are Charge Density and Basic strength related? Like if More charge density then More Basic?

The length of a side of a square is 10 cm. What is its area in square meter?

A negatively charged rod is held close to the disc of a neutral gold leaf electroscope. What kind of charge is produced on the i) disc ii) gold leaves?

A piece of iron of density 7.8×103 kg m−3 and volume 100 cm3 is totally immersed in water (ρ = 1000 kg m−3). Calculate its apparent weight in water.

A bullet fired from a ggun experience a force of 600 - 2100000t in barrel of gun Here t is in second The force become 0 as soon as bullet leave the barrel of the gun The time which was bullet in the barrel of the gum

If 50J of work must be done to move an electric charge of 2C from a point, where potential difference is -10V to another point where potential is V volt. Then the value of V is?

In the electrolysis of acidulated water, _______ gas is evolved at cathode.

If the Earth was compressed to a size of a tennis ball it would collapse and turn into black hole So, is the fact wrong?

If F1 is the magnitude of the force exerted on the Sun by Earth and F2 is the magnitude of the force exerted on Earth by the Sun, then:

The radii of the axle and the wheel are increased by 3 times and 5 times respectively.The new Mechanical advantage obtain of the wheel and axle

WHAT IS meant by amplitude ,frequency and time period of a sound wave

100ml solution of H2O2 is completely oxidised by 10ml 0.2 M KMnO4 in acidic medium.Find vol. strength of H2O2?

Which among these is not a part of the human eye?

From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 ms−1 . Calculate the initial recoil velocity of the rifle.

when a car undergoes acceleration its speed always increases or decreases

How is drinking water obtained from sea water?

x^2/(x-y)(x-z)+y^3/(y-x)(y-x)+z^3/(z-x)(z-y)=x+y+zProve that LHS=RHS

AB is a white light ray incident on the prism PQR as shown below. Complete the ray diagram when the light passes through it and falls on the adjacent screen.

44.A boy swim in a 100 m long pool.He covers 60m with a velocity of 20m/s and covers the rest of the distance with a velocity of 10m/s. Calculate the average velocity of the boy.

Gravitational force is proportional to the product of the_____ and inversely proportional to the square of _____ between the two bodies.

Define orbit.

The battery is also known as source of __-------------

Gravitational force is proportional to the product of the_ and inversely proportional to the square of _ between the two bodies.