9478 + Interview Questions in Physics Page 95 InterviewSolution

4701.	There are two holes one each along the opposite sides of a wide rec†an gular †an k. The cross section of each hole is 0.01m2 and the vertical dis†an ce between the holes is 1m. The †an k is filled with water. The net force on the †an k when water flows out of the holes is
Answer» There are two holes one each along the opposite sides of a wide rec†an gular †an k. The cross section of each hole is 0.01m2 and the vertical dis†an ce between the holes is 1m. The †an k is filled with water. The net force on the †an k when water flows out of the holes is

Discussion

4702.	if the angle between the vectors \overrightarrow a and \overrightarrow b is an acute angle, then the difference \overrightarrow a -\overrightarrow b is
Answer» if the angle between the vectors \overrightarrow a and \overrightarrow b is an acute angle, then the difference \overrightarrow a -\overrightarrow b is

Discussion

4703.	ntTwo electric bulbs rated 50 W and 100 V are glowing at full power,when used in parallel with a battery of emf 120 V and internal resistance 10 ohm.The maximum no. of bulbs that can be connected in the circuit when glowing at full powern nta)6n ntb)4n ntc)2n ntd)8n
Answer» ntTwo electric bulbs rated 50 W and 100 V are glowing at full power,when used in parallel with a battery of emf 120 V and internal resistance 10 ohm.The maximum no. of bulbs that can be connected in the circuit when glowing at full powern nta)6n ntb)4n ntc)2n ntd)8n

Discussion

4704.	ntWHATARE THE VARIOUS EQUATIONSOF ELECTRIC FIELD OF A NON CONDUCTING CYLINDER AND A SPHERE?n
Answer» ntWHATARE THE VARIOUS EQUATIONSOF ELECTRIC FIELD OF A NON CONDUCTING CYLINDER AND A SPHERE?n

Discussion

4705.	Why does the needle of a magnetic compass deflect when it is kept beside a current carrying wire?
Answer» Why does the needle of a magnetic compass deflect when it is kept beside a current carrying wire?

Discussion

4706.	A cubic vessel of height 1m is full of water. Minimum work done in taking water out from vessel will be?
Answer» A cubic vessel of height 1m is full of water. Minimum work done in taking water out from vessel will be?

Discussion

4707.	what are the impo†an t relations between molality, molarity,normality,equivalent weigh
Answer» what are the impo†an t relations between molality, molarity,normality,equivalent weigh

Discussion

4708.	Which of the following is done to increase friction?
Answer» Which of the following is done to increase friction?

Discussion

4709.	4.When equal volumes of two metals are mixed together the density of mixture is 4kg/m3. When equal masses of the same two metals are mixed together, the mixture density is 3kg/m3. Calculate the density of each metal?
Answer» 4.When equal volumes of two metals are mixed together the density of mixture is 4kg/m3. When equal masses of the same two metals are mixed together, the mixture density is 3kg/m3. Calculate the density of each metal?

Discussion

4710.	What are the number of significant figures in the following:-5000 m5 x 10 raise to power 3 m5.0 x 10 raise to power 3 m
Answer» What are the number of significant figures in the following:- 5000 m 5 x 10 raise to power 3 m 5.0 x 10 raise to power 3 m

Discussion

4711.	Geologists believe that the warning signs for a major earthquake may include sudden fluctuations in local seismic activity, tilting and other deformations of the Earth's crust, changing the measured strain across a fault zone and varying the electrical properties of underground rocks.
Answer» Geologists believe that the warning signs for a major earthquake may include sudden fluctuations in local seismic activity, tilting and other deformations of the Earth's crust, changing the measured strain across a fault zone and varying the electrical properties of underground rocks.

Discussion

4712.	29. Calculate the number of atoms in 0.05 g of water
Answer» 29. Calculate the number of atoms in 0.05 g of water

Discussion

4713.	20 cells of emf 2v and internol resis†an ce 1ohm are connected in series ,10 such arrangements are arrange in patallel if their combition has max power through load resitor then find resis†an ce of load resistor also find current in the circuit
Answer» 20 cells of emf 2v and internol resis†an ce 1ohm are connected in series ,10 such arrangements are arrange in patallel if their combition has max power through load resitor then find resis†an ce of load resistor also find current in the circuit

Discussion

4714.	For a gas at 273 K and 20 atm its molar volume is 20 percent greater than that for an ideal gas under similar conditions is the compressibility factor greater than or less than 1
Answer» For a gas at 273 K and 20 atm its molar volume is 20 percent greater than that for an ideal gas under similar conditions is the compressibility factor greater than or less than 1

Discussion

4715.	44.A closed organ pipe and an open organ pipe of the same length produce four beats, When sounded togetger . If e length of the closed organ pipe is increased, then the number of beats will 1. Remains same 2. Increases 3. Decrases 4. First decreases then remains same
Answer» 44.A closed organ pipe and an open organ pipe of the same length produce four beats, When sounded togetger . If e length of the closed organ pipe is increased, then the number of beats will 1. Remains same 2. Increases 3. Decrases 4. First decreases then remains same

Discussion

4716.	82.When SCN negative to an aqueous solution of Fe(NO3) the complex ion produced is
Answer» 82.When SCN negative to an aqueous solution of Fe(NO3) the complex ion produced is

Discussion

4717.	What is condensed water falling from the atmosphere called?
Answer» What is condensed water falling from the atmosphere called?

Discussion

4718.	The work done by the heart is 1 J per beat. If it beats 72 times in 1 minute, then the power of heart is .
Answer» The work done by the heart is $1 J$ per beat. If it beats $72$ times in $1$ minute, then the power of heart is .

Discussion

4719.	A heavy block of mass M is slowly placed on a conveyer belt moving with a speed u. The coefficient of friction between the block and the belt is y .Through what distance will the block slide on thebelt ?
Answer» A heavy block of mass M is slowly placed on a conveyer belt moving with a speed u. The coefficient of friction between the block and the belt is y .Through what distance will the block slide on thebelt ?

Discussion

4720.	Two plane mirrors are arranged parallel and facing each other at some separation. How many images are formed for a point source kept in between them?
Answer» Two plane mirrors are arranged parallel and facing each other at some separation. How many images are formed for a point source kept in between them?

Discussion

4721.	What are flammable and Non-flammable substances?
Answer» What are flammable and Non-flammable substances?

Discussion

4722.	In a freely falling body, the interchange of potential to kinetic energy takes place:
Answer» In a freely falling body, the interchange of potential to kinetic energy takes place:

Discussion

4723.	Why do we define density as mass per unit volume.
Answer» Why do we define density as mass per unit volume.

Discussion

4724.	What should be measurement taken between centre of curvature and focus and pole in spherical mirrors ?
Answer» What should be measurement taken between centre of curvature and focus and pole in spherical mirrors ?

Discussion

4725.	Lightning and thunder takes place in the sky at the same time and at the same distance from us . Lighting is sews 6 seconds before the thunder is heard . What is the hieght of the cloud ?
Answer» Lightning and thunder takes place in the sky at the same time and at the same distance from us . Lighting is sews 6 seconds before the thunder is heard . What is the hieght of the cloud ?

Discussion

4726.	2. A light house is located at A 2km off-shore from the nearest point O on a straight beach and a shop is located at B of the beach at a distance of 4km from O. If the housekeeper can row with motor boat at the speed of 4 km/h and can walk at the rate of 6 km/h where shoul he plan to reach the shore so as to cover the distance to the shop in the least possible.
Answer» 2. A light house is located at A 2km off-shore from the nearest point O on a straight beach and a shop is located at B of the beach at a distance of 4km from O. If the housekeeper can row with motor boat at the speed of 4 km/h and can walk at the rate of 6 km/h where shoul he plan to reach the shore so as to cover the distance to the shop in the least possible.

Discussion

4727.	Which use of the expansion of liquids in daily life do you know?
Answer» Which use of the expansion of liquids in daily life do you know?

Discussion

4728.	Do organic compounds ionize easily in solutions?
Answer» Do organic compounds ionize easily in solutions?

Discussion

4729.	When water is cooled to a temperature x, it gets converted into ice at temperature x by a process called P, and when ice at temperature x is warmed, it gets reconverted into water at the same temperature x in a process called Q.(a) What is the value of temperature x in Kelvin?(b) What is the process P Known as?(c) What is the name of energy released during process P?(d) What is the process Q known as?(e) What is the name of energy absorbed during process Q?
Answer» When water is cooled to a temperature x, it gets converted into ice at temperature x by a process called P, and when ice at temperature x is warmed, it gets reconverted into water at the same temperature x in a process called Q. (a) What is the value of temperature x in Kelvin? (b) What is the process P Known as? (c) What is the name of energy released during process P? (d) What is the process Q known as? (e) What is the name of energy absorbed during process Q?

Discussion

4730.	To find the distance and where image is formed by a plane mirror
Answer» To find the distance and where image is formed by a plane mirror

Discussion

4731.	A capacitor and resistor are connected with an AC source as shown in figure. Reactance of capacitor is Xc=3 Ω and resistance of resistor is R=4 Ω . The phase difference between I and I1 is degrees.
Answer» A capacitor and resistor are connected with an AC source as shown in figure. Reactance of capacitor is $X_{c} = 3 Ω$ and resistance of resistor is $R = 4 Ω$ . The phase difference between $I$ and $I_{1}$ is degrees.

Discussion

4732.	Fillin the blanks by suitable conversion of units:(a) 1kg m2s–2=....g cm2s–2(b) 1m =..... ly(c) 3.0m s–2=....km h–2(d) G=6.67  10–11Nm2(kg)–2=....(cm)3s–2g–1.
Answer» Fill in the blanks by suitable conversion of units: (a) 1 kg m²s^–2= ....g cm² s^–2 (b) 1 m =..... ly (c) 3.0 m s^–2=.... km h^–2 (d) G= 6.67  10^–11 N m² (kg)^–2=.... (cm)³s^–2 g^–1.

4732.

Fillin the blanks by suitable conversion of units:(a) 1kg m2s–2=....g cm2s–2(b) 1m =..... ly(c) 3.0m s–2=....km h–2(d) G=6.67  10–11Nm2(kg)–2=....(cm)3s–2g–1.

Answer»

Fill
in the blanks by suitable conversion of units:

(a) 1
kg m²s^–2=
....g cm²
s^–2

(b) 1
m =..... ly

(c) 3.0
m s^–2=....
km h^–2

(d) G=
6.67  10^–11
N
m²
(kg)^–2=....
(cm)³s^–2
g^–1.

Discussion

4733.	Density is given by
Answer» Density is given by

Discussion

4734.	If three objects of same mass are dropped from different heights h1, h2 & h3 such that h1 > h2 < h3, then which of the following is true about their corresponding potential energy (PE1, PE2 & PE3):
Answer» If three objects of same mass are dropped from different heights $h_{1}$ , $h_{2}$ & $h_{3}$ such that $h_{1}$ > $h_{2}$ < $h_{3}$ , then which of the following is true about their corresponding potential energy ( $P E_{1}$ , $P E_{2}$ & $P E_{3}$ ):

Discussion

4735.	What does the working of a toy telephone tell us about sound?
Answer» What does the working of a toy telephone tell us about sound?

Discussion

4736.	Write down the ways to cool down the food at home.
Answer» Write down the ways to cool down the food at home.

Discussion

4737.	___refers to a heat transfer between substances that are in direct contact with each other.
Answer» ___refers to a heat transfer between substances that are in direct contact with each other.

Discussion

4738.	The most comfortable distance at which one can read with a normal eye is about ________ cm.
Answer» The most comfortable distance at which one can read with a normal eye is about ________ cm.

Discussion

4739.	Question 16What is loudness of sound? What factors does it depend on?
Answer» Question 16 What is loudness of sound? What factors does it depend on?

Discussion

4740.	How can astronaut talk in space without any special device.
Answer» How can astronaut talk in space without any special device.

Discussion

4741.	Why do we don't hear sound below 20Hz and above 20,000Hz?
Answer» Why do we don't hear sound below 20Hz and above 20,000Hz?

Discussion

4742.	Which of the following is not a general difference between a planet and a star?
Answer» Which of the following is not a general difference between a planet and a star?

Discussion

4743.	A match box measures 4 cm×2.5 cm×1.5 cm. Volume of a packet containing 12 such boxes (no space is left in the packet) is ____________.
Answer» A match box measures $4 cm \times 2.5 cm \times 1.5 cm .$ Volume of a packet containing 12 such boxes (no space is left in the packet) is ____________.

Discussion

4744.	Question 6Match items in column A with one or more items in column B.AB(i)Inner planets(a)Saturn(ii)Outer planets(b)Pole star(iii)Constellation(c)Great Bear(iv)Satellite of the Earth(d)Moon(v)Stationary bright star(e)Earth(f)Orion(g)Mars
Answer» Question 6 Match items in column A with one or more items in column B. $\begin{matrix} A & B (i) & Inner planets & (a) & Saturn (i i) & Outer planets & (b) & Pole star (i i i) & Constellation & (c) & Great Bear (i v) & Satellite of the Earth & (d) & Moon (v) & Stationary bright star & (e) & Earth (f) & Orion (g) & Mars \end{matrix}$

4744.

Question 6Match items in column A with one or more items in column B.AB(i)Inner planets(a)Saturn(ii)Outer planets(b)Pole star(iii)Constellation(c)Great Bear(iv)Satellite of the Earth(d)Moon(v)Stationary bright star(e)Earth(f)Orion(g)Mars

Answer»

Question 6

Match items in column A with one or more items in column B.

$\begin{matrix} A & B (i) & Inner planets & (a) & Saturn (i i) & Outer planets & (b) & Pole star (i i i) & Constellation & (c) & Great Bear (i v) & Satellite of the Earth & (d) & Moon (v) & Stationary bright star & (e) & Earth (f) & Orion (g) & Mars \end{matrix}$

Discussion

4745.	Corrosion is an example of ___ (redox/reduction/physical) reaction.
Answer» Corrosion is an example of ___ (redox/reduction/physical) reaction.

Discussion

4746.	Why is the filament of the bulbs made of metal and not of wood?
Answer» Why is the filament of the bulbs made of metal and not of wood?

Discussion

4747.	If earth keeps spinning as we started out due to the fact that it experiences no external force then why is it slowing down little by little every hundred years?
Answer» If earth keeps spinning as we started out due to the fact that it experiences no external force then why is it slowing down little by little every hundred years?

Discussion

4748.	why the air ballons are fly, why they can not attracted by gravitation, why they can not come down.
Answer» why the air ballons are fly, why they can not attracted by gravitation, why they can not come down.

Discussion

4749.	Which planet's orbit will enclose more area?
Answer» Which planet's orbit will enclose more area?

Discussion

4750.	Is sound wave travelling through air longitudinal or transverse in nature?
Answer» Is sound wave travelling through air longitudinal or transverse in nature?

Discussion

Explore topic-wise InterviewSolutions in .

There are two holes one each along the opposite sides of a wide rec†an gular †an k. The cross section of each hole is 0.01m2 and the vertical dis†an ce between the holes is 1m. The †an k is filled with water. The net force on the †an k when water flows out of the holes is

if the angle between the vectors \overrightarrow a and \overrightarrow b is an acute angle, then the difference \overrightarrow a -\overrightarrow b is

ntTwo electric bulbs rated 50 W and 100 V are glowing at full power,when used in parallel with a battery of emf 120 V and internal resistance 10 ohm.The maximum no. of bulbs that can be connected in the circuit when glowing at full powern nta)6n ntb)4n ntc)2n ntd)8n

ntWHATARE THE VARIOUS EQUATIONSOF ELECTRIC FIELD OF A NON CONDUCTING CYLINDER AND A SPHERE?n

Why does the needle of a magnetic compass deflect when it is kept beside a current carrying wire?

A cubic vessel of height 1m is full of water. Minimum work done in taking water out from vessel will be?

what are the impo†an t relations between molality, molarity,normality,equivalent weigh

Which of the following is done to increase friction?

4.When equal volumes of two metals are mixed together the density of mixture is 4kg/m3. When equal masses of the same two metals are mixed together, the mixture density is 3kg/m3. Calculate the density of each metal?

What are the number of significant figures in the following:-5000 m5 x 10 raise to power 3 m5.0 x 10 raise to power 3 m

Geologists believe that the warning signs for a major earthquake may include sudden fluctuations in local seismic activity, tilting and other deformations of the Earth's crust, changing the measured strain across a fault zone and varying the electrical properties of underground rocks.

29. Calculate the number of atoms in 0.05 g of water

20 cells of emf 2v and internol resis†an ce 1ohm are connected in series ,10 such arrangements are arrange in patallel if their combition has max power through load resitor then find resis†an ce of load resistor also find current in the circuit

For a gas at 273 K and 20 atm its molar volume is 20 percent greater than that for an ideal gas under similar conditions is the compressibility factor greater than or less than 1

44.A closed organ pipe and an open organ pipe of the same length produce four beats, When sounded togetger . If e length of the closed organ pipe is increased, then the number of beats will 1. Remains same 2. Increases 3. Decrases 4. First decreases then remains same

82.When SCN negative to an aqueous solution of Fe(NO3) the complex ion produced is

What is condensed water falling from the atmosphere called?

The work done by the heart is 1 J per beat. If it beats 72 times in 1 minute, then the power of heart is .

A heavy block of mass M is slowly placed on a conveyer belt moving with a speed u. The coefficient of friction between the block and the belt is y .Through what distance will the block slide on thebelt ?

Two plane mirrors are arranged parallel and facing each other at some separation. How many images are formed for a point source kept in between them?

What are flammable and Non-flammable substances?

In a freely falling body, the interchange of potential to kinetic energy takes place:

Why do we define density as mass per unit volume.

What should be measurement taken between centre of curvature and focus and pole in spherical mirrors ?

Lightning and thunder takes place in the sky at the same time and at the same distance from us . Lighting is sews 6 seconds before the thunder is heard . What is the hieght of the cloud ?

Which use of the expansion of liquids in daily life do you know?

Do organic compounds ionize easily in solutions?

To find the distance and where image is formed by a plane mirror

A capacitor and resistor are connected with an AC source as shown in figure. Reactance of capacitor is Xc=3 Ω and resistance of resistor is R=4 Ω . The phase difference between I and I1 is degrees.

Fillin the blanks by suitable conversion of units:(a) 1kg m2s–2=....g cm2s–2(b) 1m =..... ly(c) 3.0m s–2=....km h–2(d) G=6.67  10–11Nm2(kg)–2=....(cm)3s–2g–1.

Density is given by

If three objects of same mass are dropped from different heights h1, h2 &amp; h3 such that h1 &gt; h2 &lt; h3, then which of the following is true about their corresponding potential energy (PE1, PE2 &amp; PE3):

What does the working of a toy telephone tell us about sound?

Write down the ways to cool down the food at home.

___refers to a heat transfer between substances that are in direct contact with each other.

The most comfortable distance at which one can read with a normal eye is about ________ cm.

Question 16What is loudness of sound? What factors does it depend on?

How can astronaut talk in space without any special device.

Why do we don't hear sound below 20Hz and above 20,000Hz?

Which of the following is not a general difference between a planet and a star?

A match box measures 4 cm×2.5 cm×1.5 cm. Volume of a packet containing 12 such boxes (no space is left in the packet) is ____________.

Question 6Match items in column A with one or more items in column B.AB(i)Inner planets(a)Saturn(ii)Outer planets(b)Pole star(iii)Constellation(c)Great Bear(iv)Satellite of the Earth(d)Moon(v)Stationary bright star(e)Earth(f)Orion(g)Mars

Corrosion is an example of ___ (redox/reduction/physical) reaction.

Why is the filament of the bulbs made of metal and not of wood?

If earth keeps spinning as we started out due to the fact that it experiences no external force then why is it slowing down little by little every hundred years?

why the air ballons are fly, why they can not attracted by gravitation, why they can not come down.

Which planet's orbit will enclose more area?

Is sound wave travelling through air longitudinal or transverse in nature?

If three objects of same mass are dropped from different heights h1, h2 & h3 such that h1 > h2 < h3, then which of the following is true about their corresponding potential energy (PE1, PE2 & PE3):