3752 + Interview Questions in Physics Page 43 InterviewSolution

2101.	If we heat a table wgat will happen to its molecules at microscopic level
Answer» If we heat a table wgat will happen to its molecules at microscopic level

Discussion

2102.	49.Given a number of capacitor labelled as 8 microF and 250V . Find the minimum number of capacitor needed to get an arrangement equivalent to 16microF and 1000V
Answer» 49.Given a number of capacitor labelled as 8 microF and 250V . Find the minimum number of capacitor needed to get an arrangement equivalent to 16microF and 1000V

Discussion

2103.	The series combination of resistance R and inductance L is connected to an alternating source of e.m.f. e = 311 sin (100 πt). If the value of wattless current is 0.5A and the impedance of the circuit is 311Ω, the power factor will be –
Answer» The series combination of resistance R and inductance L is connected to an alternating source of e.m.f. e = 311 sin (100 πt). If the value of wattless current is 0.5A and the impedance of the circuit is 311Ω, the power factor will be –

Discussion

2104.	Light can exihibit the properties of
Answer» Light can exihibit the properties of

Discussion

2105.

Match the following Human larynx Vibrations of metal arms Loudspeaker Vibrations in air column Jal-tarang Vibraions in vocal cords Tuning fork Vibrations in strings Sitar Vibrations of screen

Answer» Match the following

Human larynx	Vibrations of metal arms
Loudspeaker	Vibrations in air column
Jal-tarang	Vibraions in vocal cords
Tuning fork	Vibrations in strings
Sitar	Vibrations of screen

Discussion

2106.	the main scale of a vernier calipers has n divisions/cm. n divisions of the vernier scale coincide with (n-1) divisions of the main scale. the least count of the vernier scale is
Answer» the main scale of a vernier calipers has n divisions/cm. n divisions of the vernier scale coincide with (n-1) divisions of the main scale. the least count of the vernier scale is

Discussion

2107.	A sound wave causes the density of air at a place to oscillate 1200 times in 2 minutes. Find the time period of the wave.
Answer» A sound wave causes the density of air at a place to oscillate $1200$ times in $2 minutes$ . Find the time period of the wave.

Discussion

2108.	If you are given three mirrors of different types, how will you identify each one of them?
Answer» If you are given three mirrors of different types, how will you identify each one of them?

Discussion

2109.	42. Can do such calculation easily without log Eg: k has bcc structure with nearest neighbour distance 4.52 armstrong then find its density .
Answer» 42. Can do such calculation easily without log Eg: k has bcc structure with nearest neighbour distance 4.52 armstrong then find its density .

Discussion

2110.	21. The number of ways in which 7person can be seated at a round table if two particular persons are not to sit together is
Answer» 21. The number of ways in which 7person can be seated at a round table if two particular persons are not to sit together is

Discussion

2111.	If the radius of the circle is R. Find the area of the circle.
Answer» If the radius of the circle is R. Find the area of the circle.

2111.

If the radius of the circle is R. Find the area of the circle.

Answer»

If the radius of the circle is R. Find the area of the circle.

Discussion

2112.	Why are some things shiny and the others non shiny and why do things become shinier on applying oil on them ?
Answer» Why are some things shiny and the others non shiny and why do things become shinier on applying oil on them ?

Discussion

2113.	Name the old devices of measurement. What were their disadvantages?
Answer» Name the old devices of measurement. What were their disadvantages?

Discussion

2114.	Out of the given choices, which one is the most conductive element?
Answer» Out of the given choices, which one is the most conductive element?

Discussion

2115.	The least count of stop watch is 1/5 second the time of 20 oscillation of a pendulum is measured to be 25 second the maximum % error in measurement of time will be
Answer» The least count of stop watch is 1/5 second the time of 20 oscillation of a pendulum is measured to be 25 second the maximum % error in measurement of time will be

Discussion

2116.	what is end correction ? what is node and antinode?
Answer» what is end correction ? what is node and antinode?

Discussion

2117.	Why the unit of magnetic pole strength is Ampere.metre
Answer» Why the unit of magnetic pole strength is Ampere.metre

Discussion

2118.	How do maglev train is made to float above the rails?
Answer» How do maglev train is made to float above the rails?

Discussion

2119.	115.What is the percentage increase in the linear momentum if the kinetic energy of the body is increased by 800 percent?
Answer» 115.What is the percentage increase in the linear momentum if the kinetic energy of the body is increased by 800 percent?

Discussion

2120.	What are magnetic keepers ?
Answer» What are magnetic keepers ?

Discussion

2121.	eternal brilliance
Answer» eternal brilliance

Discussion

2122.	Some objects and some materials are listed below. Match the object with the material it is usually made of. ObjectMaterialOrnamentsPlasticAquariumCottonTablesMetalSleeping matressWoodWater bottlesGlass
Answer» Some objects and some materials are listed below. Match the object with the material it is usually made of. $\begin{matrix} Object & Material Ornaments & Plastic Aquarium & Cotton Tables & Metal Sleeping matress & Wood Water bottles & Glass \end{matrix}$

2122.

Some objects and some materials are listed below. Match the object with the material it is usually made of. ObjectMaterialOrnamentsPlasticAquariumCottonTablesMetalSleeping matressWoodWater bottlesGlass

Answer»

Some objects and some materials are listed below. Match the object with the material it is usually made of.

\begin{matrix} Object & Material Ornaments & Plastic Aquarium & Cotton Tables & Metal Sleeping matress & Wood Water bottles & Glass \end{matrix}

Discussion

2123.	Use the words in the brackets to fill in the blanks : (m/sec, cm/sec, linear, uniform linear) (a) An object that moves steadily in one direction has ………….. motion. (b) A girl slipping fast down a slide has ………….. motion. (c) The unit of speed in the M.K.S. system is ………….. . (d) The unit of speed in the C. G. S system is ………….. .
Answer» Use the words in the brackets to fill in the blanks : (m/sec, cm/sec, linear, uniform linear) (a) An object that moves steadily in one direction has ………….. motion. (b) A girl slipping fast down a slide has ………….. motion. (c) The unit of speed in the M.K.S. system is ………….. . (d) The unit of speed in the C. G. S system is ………….. .

2123.

Use the words in the brackets to fill in the blanks : (m/sec, cm/sec, linear, uniform linear) (a) An object that moves steadily in one direction has ………….. motion. (b) A girl slipping fast down a slide has ………….. motion. (c) The unit of speed in the M.K.S. system is ………….. . (d) The unit of speed in the C. G. S system is ………….. .

Answer»

Use the words in the brackets to fill in the blanks :

(m/sec, cm/sec, linear, uniform linear)

(a) An object that moves steadily in one direction has ………….. motion.

(b) A girl slipping fast down a slide has ………….. motion.

(c) The unit of speed in the M.K.S. system is ………….. .

(d) The unit of speed in the C. G. S system is ………….. .

Discussion

2124.	Why are we able to see only one side of the Moon?
Answer» Why are we able to see only one side of the Moon?

Discussion

2125.	Which of the following is not used for making permanent magnets?
Answer» Which of the following is not used for making permanent magnets?

Discussion

2126.	Question 14When we hear a sound, does any part of our body vibrate? Name the part.
Answer» Question 14 When we hear a sound, does any part of our body vibrate? Name the part.

Discussion

2127.	An ant first travels from P to R on a right-angled triangle PQR which is q equals to13m.Then it walks to point Q travelling p equal to 12m.If the sum of p,q and r is 30m find the displacement and distance travelled by the ant?
Answer» An ant first travels from P to R on a right-angled triangle PQR which is q equals to13m.Then it walks to point Q travelling p equal to 12m.If the sum of p,q and r is 30m find the displacement and distance travelled by the ant?

2127.

An ant first travels from P to R on a right-angled triangle PQR which is q equals to13m.Then it walks to point Q travelling p equal to 12m.If the sum of p,q and r is 30m find the displacement and distance travelled by the ant?

Answer»

An ant first travels from P to R on a right-angled triangle PQR which is q equals to13m.Then it walks to point Q travelling p equal to 12m.If the sum of p,q and r is 30m find the displacement and distance travelled by the ant?

Discussion

2128.	Write the answers to the following.(a) What things are necessary for the formation of a shadow ?(b) When can an object be seen?(c) What is a shadow?
Answer» Write the answers to the following. (a) What things are necessary for the formation of a shadow ? (b) When can an object be seen? (c) What is a shadow?

Discussion

2129.	What is a source of energy?
Answer» What is a source of energy?

Discussion

2130.	The following is the shadow of a 3-D object.Which of these objects does the shadow belong to?
Answer» The following is the shadow of a 3-D object. Which of these objects does the shadow belong to?

Discussion

2131.	70.Show that the magnetic field at a point due to a magnetic dipole is perpendicular to the magnetic axis if the line joining the point with the centre of the dipole makes an angle of tan inverse under root(2) with the magnetic axis.
Answer» 70.Show that the magnetic field at a point due to a magnetic dipole is perpendicular to the magnetic axis if the line joining the point with the centre of the dipole makes an angle of tan inverse under root(2) with the magnetic axis.

Discussion

2132.	What is titration? and its formula.
Answer» What is titration? and its formula.

Discussion

2133.	Identify the shape of the shadow of the given object.
Answer» Identify the shape of the shadow of the given object.

Discussion

2134.	How will you test that ‘tea dust’ is not adulterated with iron powder?
Answer» How will you test that ‘tea dust’ is not adulterated with iron powder?

Discussion

2135.	Can’t you do these in your head?(i) (ii) (iii) (iv)
Answer» Can’t you do these in your head? (i) (ii) (iii) (iv)

2135.

Can’t you do these in your head?(i) (ii) (iii) (iv)

Answer»

Can’t you do these in your head?

(i)

(ii)

(iii)

(iv)

Discussion

2136.	How to measure speed ofsoun
Answer» How to measure speed ofsoun

Discussion

2137.	Question 17 A student covered a torch with red cellophane sheet to obtain red light. Using the red light she obtains a shadow of an opaque object. She repeats this activity with green and blue light. Will the colour of the light affect the shadow? Explain
Answer» Question 17 A student covered a torch with red cellophane sheet to obtain red light. Using the red light she obtains a shadow of an opaque object. She repeats this activity with green and blue light. Will the colour of the light affect the shadow? Explain

2137.

Question 17 A student covered a torch with red cellophane sheet to obtain red light. Using the red light she obtains a shadow of an opaque object. She repeats this activity with green and blue light. Will the colour of the light affect the shadow? Explain

Answer»

Question 17

A student covered a torch with red cellophane sheet to obtain red light. Using the red light she obtains a shadow of an opaque object. She repeats this activity with green and blue light. Will the colour of the light affect the shadow? Explain

Discussion

2138.	With respect to non-contact forces, which of the following statements are correct?
Answer» With respect to non-contact forces, which of the following statements are correct?

Discussion

2139.	When you turn a screw, it undergoes two kinds of motion at the same time. Can you identify the two kinds of motion?
Answer» When you turn a screw, it undergoes two kinds of motion at the same time. Can you identify the two kinds of motion?

Discussion

2140.	what is the difference between relative charge and absolute charge?
Answer» what is the difference between relative charge and absolute charge?

Discussion

2141.	The second hand of a clock moves _______ than the hour hand.
Answer» The second hand of a clock moves _______ than the hour hand.

Discussion

2142.	1. A force of 10.5 N acts on a partical along a direction making an angle of 37 degree with the vertical.find the component of the force in the vertical direction.
Answer» 1. A force of 10.5 N acts on a partical along a direction making an angle of 37 degree with the vertical.find the component of the force in the vertical direction.

Discussion

2143.	1 m2=____ cm2
Answer» $1 m^{2} =____c m^{2}$

Discussion

2144.	While measuring the length of a steel needle, the reading of the scale at one end is 3.0 cm and at the other end is 44.2 cm. Determine the length of the needle.
Answer» While measuring the length of a steel needle, the reading of the scale at one end is 3.0 cm and at the other end is 44.2 cm. Determine the length of the needle.

Discussion

2145.	In the adjacent circuit, find the effective resistance between the points A and B.
Answer» In the adjacent circuit, find the effective resistance between the points A and B.

Discussion

2146.	the two masses M and m are connected together by the pulley two strings and a strected spring of FORCE constant K the mass m and spring in in horizontal plane and mass M is in vertical plane the amount by which the spring is stretched (ASSUMING THE SPRING IS massless AND mass m is in smooth surface )
Answer» the two masses M and m are connected together by the pulley two strings and a strected spring of FORCE constant K the mass m and spring in in horizontal plane and mass M is in vertical plane the amount by which the spring is stretched (ASSUMING THE SPRING IS massless AND mass m is in smooth surface )

Discussion

2147.	Water at room temperature is a liquid but iron piece is a solid because
Answer» Water at room temperature is a liquid but iron piece is a solid because

Discussion

2148.	Metal cap of an electric cell is the __________terminal of the cell.
Answer» Metal cap of an electric cell is the __________terminal of the cell.

Discussion

2149.	A capaci†an ce of 2 micro farad is required in an electrical circuit acriss a PD of 1KV .A large number of 1 micri farad capacitor are available which can withs†an d a PD of not more then 300V. Find minimum number of capacitor required to achieve this
Answer» A capaci†an ce of 2 micro farad is required in an electrical circuit acriss a PD of 1KV .A large number of 1 micri farad capacitor are available which can withs†an d a PD of not more then 300V. Find minimum number of capacitor required to achieve this

Discussion

2150.	31 A cylinder of mass m and radius R is rolling onplane horizontal surface. Work done by force offriction, if centre is displaced by x, ismgx(2)3(1) mgx(3)mgx(4) Zero3
Answer» 31 A cylinder of mass m and radius R is rolling onplane horizontal surface. Work done by force offriction, if centre is displaced by x, ismgx(2)3(1) mgx(3)mgx(4) Zero3

Discussion

Explore topic-wise InterviewSolutions in .

If we heat a table wgat will happen to its molecules at microscopic level

49.Given a number of capacitor labelled as 8 microF and 250V . Find the minimum number of capacitor needed to get an arrangement equivalent to 16microF and 1000V

The series combination of resistance R and inductance L is connected to an alternating source of e.m.f. e = 311 sin (100 πt). If the value of wattless current is 0.5A and the impedance of the circuit is 311Ω, the power factor will be –

Light can exihibit the properties of

Match the following Human larynx Vibrations of metal arms Loudspeaker Vibrations in air column Jal-tarang Vibraions in vocal cords Tuning fork Vibrations in strings Sitar Vibrations of screen

the main scale of a vernier calipers has n divisions/cm. n divisions of the vernier scale coincide with (n-1) divisions of the main scale. the least count of the vernier scale is

A sound wave causes the density of air at a place to oscillate 1200 times in 2 minutes. Find the time period of the wave.

If you are given three mirrors of different types, how will you identify each one of them?

42. Can do such calculation easily without log Eg: k has bcc structure with nearest neighbour distance 4.52 armstrong then find its density .

21. The number of ways in which 7person can be seated at a round table if two particular persons are not to sit together is

If the radius of the circle is R. Find the area of the circle.

Why are some things shiny and the others non shiny and why do things become shinier on applying oil on them ?

Name the old devices of measurement. What were their disadvantages?

Out of the given choices, which one is the most conductive element?

The least count of stop watch is 1/5 second the time of 20 oscillation of a pendulum is measured to be 25 second the maximum % error in measurement of time will be

what is end correction ? what is node and antinode?

Why the unit of magnetic pole strength is Ampere.metre

How do maglev train is made to float above the rails?

115.What is the percentage increase in the linear momentum if the kinetic energy of the body is increased by 800 percent?

What are magnetic keepers ?

eternal brilliance

Some objects and some materials are listed below. Match the object with the material it is usually made of. ObjectMaterialOrnamentsPlasticAquariumCottonTablesMetalSleeping matressWoodWater bottlesGlass

Why are we able to see only one side of the Moon?

Which of the following is not used for making permanent magnets?

Question 14When we hear a sound, does any part of our body vibrate? Name the part.

An ant first travels from P to R on a right-angled triangle PQR which is q equals to13m.Then it walks to point Q travelling p equal to 12m.If the sum of p,q and r is 30m find the displacement and distance travelled by the ant?

Write the answers to the following.(a) What things are necessary for the formation of a shadow ?(b) When can an object be seen?(c) What is a shadow?

What is a source of energy?

The following is the shadow of a 3-D object.Which of these objects does the shadow belong to?

70.Show that the magnetic field at a point due to a magnetic dipole is perpendicular to the magnetic axis if the line joining the point with the centre of the dipole makes an angle of tan inverse under root(2) with the magnetic axis.

What is titration? and its formula.

Identify the shape of the shadow of the given object.

How will you test that ‘tea dust’ is not adulterated with iron powder?

Can’t you do these in your head?(i) (ii) (iii) (iv)

How to measure speed ofsoun

Question 17 A student covered a torch with red cellophane sheet to obtain red light. Using the red light she obtains a shadow of an opaque object. She repeats this activity with green and blue light. Will the colour of the light affect the shadow? Explain

With respect to non-contact forces, which of the following statements are correct?

When you turn a screw, it undergoes two kinds of motion at the same time. Can you identify the two kinds of motion?

what is the difference between relative charge and absolute charge?

The second hand of a clock moves _______ than the hour hand.

1. A force of 10.5 N acts on a partical along a direction making an angle of 37 degree with the vertical.find the component of the force in the vertical direction.

1 m2=____ cm2

While measuring the length of a steel needle, the reading of the scale at one end is 3.0 cm and at the other end is 44.2 cm. Determine the length of the needle.

In the adjacent circuit, find the effective resistance between the points A and B.

Water at room temperature is a liquid but iron piece is a solid because

Metal cap of an electric cell is the __________terminal of the cell.

A capaci†an ce of 2 micro farad is required in an electrical circuit acriss a PD of 1KV .A large number of 1 micri farad capacitor are available which can withs†an d a PD of not more then 300V. Find minimum number of capacitor required to achieve this

31 A cylinder of mass m and radius R is rolling onplane horizontal surface. Work done by force offriction, if centre is displaced by x, ismgx(2)3(1) mgx(3)mgx(4) Zero3