9478 + Interview Questions in Physics Page 41 InterviewSolution

2001.	Question 4 (e)Shooting stars are actually not _________.
Answer» Question 4 (e) Shooting stars are actually not _________.

2001.

Question 4 (e)Shooting stars are actually not _________.

Answer»

Question 4 (e)

Shooting stars are actually not _________.

2002.	when 2 soap bubbles of radius r1 and r2 coalese then the radius r of the interface is r1r2/r1 -r2. ? explain why we put 4s/r1 -4s/r2 =4s/r where s is the surface tension
Answer» when 2 soap bubbles of radius r1 and r2 coalese then the radius r of the interface is r1r2/r1 -r2. ? explain why we put 4s/r1 -4s/r2 =4s/r where s is the surface tension

Discussion

2003.	A force that can change the motion of an object without actually touching it is __________.
Answer» A force that can change the motion of an object without actually touching it is __________.

Discussion

2004.	What to take moment of inertia of a magnet in:1) normal conditions2) when length is v large as compared to its width and breath
Answer» What to take moment of inertia of a magnet in: 1) normal conditions 2) when length is v large as compared to its width and breath

Discussion

2005.	What would happen if we use a naked copper wire and connect it to first +ve end of battery and another end to -ve end; then dip it in copper sulphate solution ?
Answer» What would happen if we use a naked copper wire and connect it to first +ve end of battery and another end to -ve end; then dip it in copper sulphate solution ?

Discussion

2006.	what is electric
Answer» what is electric

Discussion

2007.	What is a crescent moon?
Answer» What is a crescent moon?

Discussion

2008.	Why does the refrigerator gives out water when power supply is cut off?
Answer» Why does the refrigerator gives out water when power supply is cut off?

Discussion

2009.	Show that root 4 +5 and 4 /root 3 is a irrational number
Answer» Show that root 4 +5 and 4 /root 3 is a irrational number

Discussion

2010.	Fill in the blanks: (a) Evaporation takes place at___ temperature. (b) ___process is just the reverse of melting. (c) ___ is a process that involves the direct conversion of a solid into its vapour on heating. (d) The temperature at which a solid convert into a liquid is called its___ (e) The smallest unit of matter that exists freely ni nature is called___ (f) Molecules of a substance are always in a state of___ and so they possess ___ (g) Inter-molecular space is maximum in ___less in ___and the least in ___ (h) Inter-molecular force of attraction is maximum in___less in ___and the least in ___
Answer» Fill in the blanks: (a) Evaporation takes place at___ temperature. (b) ___process is just the reverse of melting. (c) ___ is a process that involves the direct conversion of a solid into its vapour on heating. (d) The temperature at which a solid convert into a liquid is called its___ (e) The smallest unit of matter that exists freely ni nature is called___ (f) Molecules of a substance are always in a state of___ and so they possess ___ (g) Inter-molecular space is maximum in ___less in ___and the least in ___ (h) Inter-molecular force of attraction is maximum in___less in ___and the least in ___

2010.

Fill in the blanks: (a) Evaporation takes place at_ temperature. (b) _process is just the reverse of melting. (c) _ is a process that involves the direct conversion of a solid into its vapour on heating. (d) The temperature at which a solid convert into a liquid is called its_ (e) The smallest unit of matter that exists freely ni nature is called_ (f) Molecules of a substance are always in a state of_ and so they possess _ (g) Inter-molecular space is maximum in _less in _and the least in _ (h) Inter-molecular force of attraction is maximum in_less in _and the least in ___

Answer»

Fill in the blanks:

(a) Evaporation takes place at___ temperature.

(b) ___process is just the reverse of melting.

(c) ___ is a process that involves the direct conversion of a solid into its vapour on heating.

(d) The temperature at which a solid convert into a liquid is called its___

(e) The smallest unit of matter that exists freely ni nature is called___

(f) Molecules of a substance are always in a state of___ and so they possess ___

(g) Inter-molecular space is maximum in ___less in ___and the least in ___

(h) Inter-molecular force of attraction is maximum in___less in ___and the least in ___

Discussion

2011.	A Square surface of side L meter in the plane of paper is placed in a uniform electric field E (volt/m) acting along the same plane at an angle theta with the horizontal side of square as shown in figure. The electric flux linked to the surface; in units of volt /m is
Answer» A Square surface of side L meter in the plane of paper is placed in a uniform electric field E (volt/m) acting along the same plane at an angle theta with the horizontal side of square as shown in figure. The electric flux linked to the surface; in units of volt /m is

Discussion

2012.	A pressure exerted by a liquid at a depth of 5 m is 80 Pa. Find the density of the liquid. Take acceleration due to gravity as 10 m/s2
Answer» A pressure exerted by a liquid at a depth of $5 m$ is $80 P a$ . Find the density of the liquid. Take acceleration due to gravity as $10 m / s^{2}$

Discussion

2013.	If a rec†an gular block is moving on an inclined plane,then the magnitude of friction is-?
Answer» If a rec†an gular block is moving on an inclined plane,then the magnitude of friction is-?

Discussion

2014.	Sodium light of wavelength 5890A travelling from a galaxy is observed to be 5896A. What is the speed of the galaxy
Answer» Sodium light of wavelength 5890A travelling from a galaxy is observed to be 5896A. What is the speed of the galaxy

Discussion

2015.	If mica and woolen cloth are rubbed together, then mica gets
Answer» If mica and woolen cloth are rubbed together, then mica gets

Discussion

2016.	Derieve newtons first law of motion from second law of motion with explanation
Answer» Derieve newtons first law of motion from second law of motion with explanation

Discussion

2017.	Explain how a piece of styrofoam gets charged when it is rubbed with a piece of paper.
Answer» Explain how a piece of styrofoam gets charged when it is rubbed with a piece of paper.

Discussion

2018.	What is a fundamental difference between the south and north pole of a magnet?
Answer» What is a fundamental difference between the south and north pole of a magnet?

Discussion

2019.	The inverse laplace transform of signalX(s)=4(s+2)(s+4); if ROC is−2> Re(s)>−4 is
Answer» The inverse laplace transform of signal $X (s) = \frac{4}{(s + 2) (s + 4)}; i f R O C i s - 2 > R e (s) > - 4$ is

Discussion

2020.	Match the electrical components with their corresponding symbols.
Answer» Match the electrical components with their corresponding symbols.

Discussion

2021.	Suppose you have three bodies A, B and C. A and B are at same temperature. When B and C are brought in contact, heat flows from C to B until flow of heat stops. What will happen when A and C are brought in contact?
Answer» Suppose you have three bodies A, B and C. A and B are at same temperature. When B and C are brought in contact, heat flows from C to B until flow of heat stops. What will happen when A and C are brought in contact?

Discussion

2022.	The image of the word EARTH as seen from the periscope would appear as:
Answer» The image of the word EARTH as seen from the periscope would appear as:

Discussion

2023.	Why 'n' is given as 'sin i/ sin r', instead of simply writing it as angle of incidence/angle of refraction?
Answer» Why 'n' is given as 'sin i/ sin r', instead of simply writing it as angle of incidence/angle of refraction?

Discussion

2024.	What is the charge flowing through a wire if a current of 20 A flows for 0.5 s?
Answer» What is the charge flowing through a wire if a current of $20 A$ flows for $0.5 s$ ?

Discussion

2025.	Two masses 2 kg and 3 kg are attached to the end of the string passed over a pulley fixed at the top. The tension and acceleration are
Answer» Two masses 2 kg and 3 kg are attached to the end of the string passed over a pulley fixed at the top. The tension and acceleration are

Discussion

2026.	Why do unlike charges attract and like charges repel?
Answer» Why do unlike charges attract and like charges repel?

Discussion

2027.	24. Is plasma state made up of particles
Answer» 24. Is plasma state made up of particles

Discussion

2028.	Two blocks each of mass m connected by an ideal spring are placed over a smooth horizontal surface.At the moment when spring was in its natural length, force F mg is applied horizontally on block A.Maximum acceleration of block B during motion is observed to be Ng. Find value of N.
Answer» Two blocks each of mass m connected by an ideal spring are placed over a smooth horizontal surface.At the moment when spring was in its natural length, force F mg is applied horizontally on block A.Maximum acceleration of block B during motion is observed to be Ng. Find value of N.

Discussion

2029.	77.A mixture of gases at NTP for which γ =1.5 is suddenly compressed to 1/9th of its original volume . The final temperature of mixture is (1)300^° c (2)546^° c (3)420^° c (4)872^° c
Answer» 77.A mixture of gases at NTP for which γ =1.5 is suddenly compressed to 1/9th of its original volume . The final temperature of mixture is (1)300^° c (2)546^° c (3)420^° c (4)872^° c

Discussion

2030.	Identify the type of pollution based on the images given below.
Answer» Identify the type of pollution based on the images given below.

Discussion

2031.	Choose the correct option: 1.Tonei.frequencies that are integral multiple of fundamental frequency2.Noteii.sound of single frequency3.Overtoneiii.sound of multiple frequencies4.Harmoniciv.higher frequencies other than fundamental frequency
Answer» Choose the correct option: $\begin{matrix} 1. & Tone & i. & frequencies that are integral multiple of fundamental frequency 2. & Note & ii. & sound of single frequency 3. & Overtone & iii. & sound of multiple frequencies 4. & Harmonic & iv. & higher frequencies other than fundamental frequency \end{matrix}$

Discussion

2032.	33. Write half cell reaction of fuel cell mention one of its advantages
Answer» 33. Write half cell reaction of fuel cell mention one of its advantages

Discussion

2033.	A soap bubble of radius r is blown up to form a bubble of radius 2r under isothermal conditions. If σ is the surface tension of soap solution, the energy spent in doing so is
Answer» A soap bubble of radius r is blown up to form a bubble of radius 2r under isothermal conditions. If $σ$ is the surface tension of soap solution, the energy spent in doing so is

Discussion

2034.	a bullet looses half of its speed while travelling 30 cm inside a wooden block.how much further will it travel before stopping?
Answer» a bullet looses half of its speed while travelling 30 cm inside a wooden block.how much further will it travel before stopping?

Discussion

2035.	find the flux through the square plate when a point charge is placed at main centre of the plate??
Answer» find the flux through the square plate when a point charge is placed at main centre of the plate??

Discussion

2036.	1. H_2 gas is absorbed on a metal surface like platinum. This follows : 1) first order rxn 2)second order rxn 3) third order rxn 4) Zero order rxn
Answer» 1. H_2 gas is absorbed on a metal surface like platinum. This follows : 1) first order rxn 2)second order rxn 3) third order rxn 4) Zero order rxn

Discussion

2037.	In what way are we different?(a) Muscular force and mechanical force.(b) The force of friction and gravitational force.
Answer» In what way are we different? (a) Muscular force and mechanical force. (b) The force of friction and gravitational force.

Discussion

2038.	A 12-pole dc generator has a simplex wave wound armature containing 144 coils of 10 turns each. The resistance of each turn is 0.011 Ω. It's flux per pole is 0.05 Wb and it is running at a speed of 200 rev/min. If a 1kΩ resistor is connected to the terminals of this generator, the resulting induced counter torque on the shaft of the machine is ______Nm.394.65
Answer» A 12-pole dc generator has a simplex wave wound armature containing 144 coils of 10 turns each. The resistance of each turn is 0.011 $Ω$ . It's flux per pole is 0.05 Wb and it is running at a speed of 200 rev/min. If a 1k $Ω$ resistor is connected to the terminals of this generator, the resulting induced counter torque on the shaft of the machine is ______Nm. 394.65

Discussion

2039.	To have a 10 V potential difference, we need___.
Answer» To have a 10 V potential difference, we need___.

Discussion

2040.	Answer in your own words.(a) How will you protect yourself from lightning?(b) How are charges generated?(c) In the lightning conductor, what provision is made for spreading the electricity into the ground?(d) Why do farmers stick an iron staff into the ground while working in the field in rainy conditions?(e) Why is lightning not seen everyday during the rainy season?
Answer» Answer in your own words. (a) How will you protect yourself from lightning? (b) How are charges generated? (c) In the lightning conductor, what provision is made for spreading the electricity into the ground? (d) Why do farmers stick an iron staff into the ground while working in the field in rainy conditions? (e) Why is lightning not seen everyday during the rainy season?

Discussion

2041.	Which force makes a body to float in a liquid ?
Answer» Which force makes a body to float in a liquid ?

Discussion

2042.	Why pressure does not affect the volume of solid and liquid state but affect gaseous state
Answer» Why pressure does not affect the volume of solid and liquid state but affect gaseous state

Discussion

2043.	can more than one force act on an object like frictional and magnetic force or contact on non contact force
Answer» can more than one force act on an object like frictional and magnetic force or contact on non contact force

Discussion

2044.	Identify the substance that can undergo sublimation.
Answer» Identify the substance that can undergo sublimation.

Discussion

2045.	Is it possible that a person on a frictionless surface can get away from it by blowing air out of his mouth according to newton's 3 law ? Explain how .
Answer» Is it possible that a person on a frictionless surface can get away from it by blowing air out of his mouth according to newton's 3 law ? Explain how .

Discussion

2046.	Give any three safety measures to be followed during lightning and thunderstorm. [3 MARKS]
Answer» Give any three safety measures to be followed during lightning and thunderstorm. [3 MARKS]

Discussion

2047.	How the charge is generated ?
Answer» How the charge is generated ?

Discussion

2048.	what will happen to leaves of electroscope if positively charged body is brought near a) uncharged electroscopeb) positively charged electroscopeC) negatively charged electroscopeExplain??in part (c) why do they first converge and then diverge??
Answer» what will happen to leaves of electroscope if positively charged body is brought near a) uncharged electroscope b) positively charged electroscope C) negatively charged electroscope Explain?? in part (c) why do they first converge and then diverge??

Discussion

2049.	The loudness of a sound is 8 dB when the amplitude of vibrations is 2 units. If the amplitude is increased to 8 units, find the loudness of the sound in dB.[3 MARKS]
Answer» The loudness of a sound is 8 dB when the amplitude of vibrations is 2 units. If the amplitude is increased to 8 units, find the loudness of the sound in dB.[3 MARKS]

Discussion

2050.	What is vdg in water up thrust
Answer» What is vdg in water up thrust

Discussion

Explore topic-wise InterviewSolutions in .

Question 4 (e)Shooting stars are actually not _________.

when 2 soap bubbles of radius r1 and r2 coalese then the radius r of the interface is r1r2/r1 -r2. ? explain why we put 4s/r1 -4s/r2 =4s/r where s is the surface tension

A force that can change the motion of an object without actually touching it is __________.

What to take moment of inertia of a magnet in:1) normal conditions2) when length is v large as compared to its width and breath

What would happen if we use a naked copper wire and connect it to first +ve end of battery and another end to -ve end; then dip it in copper sulphate solution ?

what is electric

What is a crescent moon?

Why does the refrigerator gives out water when power supply is cut off?

Show that root 4 +5 and 4 /root 3 is a irrational number

A Square surface of side L meter in the plane of paper is placed in a uniform electric field E (volt/m) acting along the same plane at an angle theta with the horizontal side of square as shown in figure. The electric flux linked to the surface; in units of volt /m is

A pressure exerted by a liquid at a depth of 5 m is 80 Pa. Find the density of the liquid. Take acceleration due to gravity as 10 m/s2

If a rec†an gular block is moving on an inclined plane,then the magnitude of friction is-?

Sodium light of wavelength 5890A travelling from a galaxy is observed to be 5896A. What is the speed of the galaxy

If mica and woolen cloth are rubbed together, then mica gets

Derieve newtons first law of motion from second law of motion with explanation

Explain how a piece of styrofoam gets charged when it is rubbed with a piece of paper.

What is a fundamental difference between the south and north pole of a magnet?

The inverse laplace transform of signalX(s)=4(s+2)(s+4); if ROC is−2&gt; Re(s)&gt;−4 is

Match the electrical components with their corresponding symbols.

Suppose you have three bodies A, B and C. A and B are at same temperature. When B and C are brought in contact, heat flows from C to B until flow of heat stops. What will happen when A and C are brought in contact?

The image of the word EARTH as seen from the periscope would appear as:

Why 'n' is given as 'sin i/ sin r', instead of simply writing it as angle of incidence/angle of refraction?

What is the charge flowing through a wire if a current of 20 A flows for 0.5 s?

Two masses 2 kg and 3 kg are attached to the end of the string passed over a pulley fixed at the top. The tension and acceleration are

Why do unlike charges attract and like charges repel?

24. Is plasma state made up of particles

Two blocks each of mass m connected by an ideal spring are placed over a smooth horizontal surface.At the moment when spring was in its natural length, force F mg is applied horizontally on block A.Maximum acceleration of block B during motion is observed to be Ng. Find value of N.

77.A mixture of gases at NTP for which γ =1.5 is suddenly compressed to 1/9th of its original volume . The final temperature of mixture is (1)300^° c (2)546^° c (3)420^° c (4)872^° c

Identify the type of pollution based on the images given below.

Choose the correct option: 1.Tonei.frequencies that are integral multiple of fundamental frequency2.Noteii.sound of single frequency3.Overtoneiii.sound of multiple frequencies4.Harmoniciv.higher frequencies other than fundamental frequency

33. Write half cell reaction of fuel cell mention one of its advantages

A soap bubble of radius r is blown up to form a bubble of radius 2r under isothermal conditions. If σ is the surface tension of soap solution, the energy spent in doing so is

a bullet looses half of its speed while travelling 30 cm inside a wooden block.how much further will it travel before stopping?

find the flux through the square plate when a point charge is placed at main centre of the plate??

1. H_2 gas is absorbed on a metal surface like platinum. This follows : 1) first order rxn 2)second order rxn 3) third order rxn 4) Zero order rxn

In what way are we different?(a) Muscular force and mechanical force.(b) The force of friction and gravitational force.

To have a 10 V potential difference, we need___.

Which force makes a body to float in a liquid ?

Why pressure does not affect the volume of solid and liquid state but affect gaseous state

can more than one force act on an object like frictional and magnetic force or contact on non contact force

Identify the substance that can undergo sublimation.

Is it possible that a person on a frictionless surface can get away from it by blowing air out of his mouth according to newton's 3 law ? Explain how .

Give any three safety measures to be followed during lightning and thunderstorm. [3 MARKS]

How the charge is generated ?

what will happen to leaves of electroscope if positively charged body is brought near a) uncharged electroscopeb) positively charged electroscopeC) negatively charged electroscopeExplain??in part (c) why do they first converge and then diverge??

The loudness of a sound is 8 dB when the amplitude of vibrations is 2 units. If the amplitude is increased to 8 units, find the loudness of the sound in dB.[3 MARKS]

What is vdg in water up thrust

The inverse laplace transform of signalX(s)=4(s+2)(s+4); if ROC is−2> Re(s)>−4 is