9478 + Interview Questions in Physics Page 4 InterviewSolution

151.	a capacitor of plate area a and seperation d is filled with 2 dielectrics of dielectric cons†an t k=6 k2=4.new capaci†an ce will
Answer» a capacitor of plate area a and seperation d is filled with 2 dielectrics of dielectric cons†an t k=6 k2=4.new capaci†an ce will

Discussion

152.	Which of the following objects should not be chrome-plated ? (a) car bumper (b) gas stove (c) frying pan (d) bicycle bell
Answer» Which of the following objects should not be chrome-plated ? (a) car bumper (b) gas stove (c) frying pan (d) bicycle bell

Discussion

153.	86.A capacitor of capacitance c carrying charge q is connected to a source of emf e .Finally the charge on capacitor would be ? 1 q 2 q+ce 3 ce 4 none of these
Answer» 86.A capacitor of capacitance c carrying charge q is connected to a source of emf e .Finally the charge on capacitor would be ? 1 q 2 q+ce 3 ce 4 none of these

Discussion

154.	State which part of speech is the underlined word. The horse was not properly saddled.
Answer» State which part of speech is the underlined word. The horse was not properly saddled.

154.

State which part of speech is the underlined word. The horse was not properly saddled.

Answer»

State which part of speech is the underlined word.

The horse was not properly saddled.

Discussion

155.	For a electrolytic conductor, the transport number of cation is given by t+ is the transport number of cationt− is the transport number of anion
Answer» For a electrolytic conductor, the transport number of cation is given by $t_{+} is the transport number of cation$ $t_{-} is the transport number of anion$

Discussion

156.	Is it safe for an electrician to carry out electrical repairs outdoors during a heavy downpour? Explain. [3 MARKS]
Answer» Is it safe for an electrician to carry out electrical repairs outdoors during a heavy downpour? Explain. [3 MARKS]

Discussion

157.	What is the principle of rainbow formation??(1)Dispersion (2)Reflection (3)Scattering (4)Both (1) and (2)
Answer» What is the principle of rainbow formation?? (1)Dispersion (2)Reflection (3)Scattering (4)Both (1) and (2)

Discussion

158.	Dear sir/Ma'am I have a problem in this question Q. A load suspended from a spring and its other end is on a hook fix to a wall , in this case mechanical force is acting ?
Answer» Dear sir/Ma'am I have a problem in this question Q. A load suspended from a spring and its other end is on a hook fix to a wall , in this case mechanical force is acting ?

Discussion

159.	when 4gm of a mixture of NaHCO3 and NaCl is heated , 0.66gm CO2 gas is evolved .determine the percentage composition of the mixture?
Answer» when 4gm of a mixture of NaHCO3 and NaCl is heated , 0.66gm CO2 gas is evolved .determine the percentage composition of the mixture?

Discussion

160.	Which of the following would be least likely to sink into the soft ground?
Answer» Which of the following would be least likely to sink into the soft ground?

Discussion

161.	In a barber's shop, two plane mirrors are placed : (a) perpendicular to each other (b) parallel to each other (c) at an angle of 60∘ between them (d) at an angle of 45∘ between them.
Answer» In a barber's shop, two plane mirrors are placed : (a) perpendicular to each other (b) parallel to each other (c) at an angle of $60^{\circ}$ between them (d) at an angle of $45^{\circ}$ between them.

161.

In a barber's shop, two plane mirrors are placed : (a) perpendicular to each other (b) parallel to each other (c) at an angle of 60∘ between them (d) at an angle of 45∘ between them.

Answer»

In a barber's shop, two plane mirrors are placed :

(a) perpendicular to each other

(b) parallel to each other

(c) at an angle of $60^{\circ}$ between them

(d) at an angle of $45^{\circ}$ between them.

Discussion

162.	When a book placed on a horizontal desk is pushed towards right, in which direction does the force of friction act on the book?
Answer» When a book placed on a horizontal desk is pushed towards right, in which direction does the force of friction act on the book?

Discussion

163.	An electrical appliance of 500 W is used for 2 hours per day. Calculate the energy consumed in a day.1
Answer» An electrical appliance of $500 W$ is used for $2$ hours per day. Calculate the energy consumed in a day. 1

Discussion

164.	Describe the process of purification of impure copper using electroplating. [5 MARKS]
Answer» Describe the process of purification of impure copper using electroplating. [5 MARKS]

Discussion

165.	Two ___cords are stretched across the voice box or larynx in such a way that it leaves a narrow slit between them for the passage of air
Answer» Two ___cords are stretched across the voice box or larynx in such a way that it leaves a narrow slit between them for the passage of air

Discussion

166.	121. When an object can be seen with one eye,why is it that we have a pair of eyes
Answer» 121. When an object can be seen with one eye,why is it that we have a pair of eyes

Discussion

167.	Orion has monomeric unit
Answer» Orion has monomeric unit

Discussion

168.	6.Whena soap bubble is charged ,excess pressure inside it (assume radius doesn"t change) DECREASES
Answer» 6.Whena soap bubble is charged ,excess pressure inside it (assume radius doesn"t change) DECREASES

Discussion

169.	A train consisting of 30 wagons each of 15 tons and ispulled by an engine of power 90 KW. If the frictionalforce and air resistance force offered per ton of thetrain is 12 N then the maximum velocity with whichthe train can travel is
Answer» A train consisting of 30 wagons each of 15 tons and ispulled by an engine of power 90 KW. If the frictionalforce and air resistance force offered per ton of thetrain is 12 N then the maximum velocity with whichthe train can travel is

Discussion

170.	What happens to the friction between the two surfaces when the lubricant is applied between the two surfaces?
Answer» What happens to the friction between the two surfaces when the lubricant is applied between the two surfaces?

Discussion

171.	ntblock-2 having mass m and charge Q is held stationary in air with the help of block-1 carrying some charge. If the distance between the blocks is h, then the charge on block-1 isn
Answer» ntblock-2 having mass m and charge Q is held stationary in air with the help of block-1 carrying some charge. If the distance between the blocks is h, then the charge on block-1 isn

Discussion

172.	3. A body of 18kg moving with 18 m/s. Find the Kinetic energy of the body?
Answer» 3. A body of 18kg moving with 18 m/s. Find the Kinetic energy of the body?

Discussion

173.	Good Evening Sir,I want to put an question regarding the layers of atmosphere that there are how many layers present in atmosphere because I don't find in rest pages.And I have asked my mentor too.
Answer» Good Evening Sir,I want to put an question regarding the layers of atmosphere that there are how many layers present in atmosphere because I don't find in rest pages.And I have asked my mentor too.

Discussion

174.	Fill in the blanks with approriate word:a. The region in a sound wave, with higher pressure and density is called................ and that with low pressure and density is called........... .b. Medium is ....................... for generation of sound.c. The total number of compressions and rarefactions produced per second in a sound wave is 1000. The frequency of the sound wave is.................. .d. Different sound notes have different.............. .e. In loudspeaker................energy is converted into..................energy.
Answer» Fill in the blanks with approriate word: a. The region in a sound wave, with higher pressure and density is called................ and that with low pressure and density is called........... . b. Medium is ....................... for generation of sound. c. The total number of compressions and rarefactions produced per second in a sound wave is 1000. The frequency of the sound wave is.................. . d. Different sound notes have different.............. . e. In loudspeaker................energy is converted into..................energy.

Discussion

175.	The lift force acting on the wing of an aeroplane is 2275 N. If the area of the wing is 5 m2 and velocity of air on the lower surface of the wing is 30 m/s, velocity of air on the upper surface of the wing is (density of air is 1.3 kg/m3)
Answer» The lift force acting on the wing of an aeroplane is $2275 N$ . If the area of the wing is $5 m^{2}$ and velocity of air on the lower surface of the wing is $30 m/s$ , velocity of air on the upper surface of the wing is (density of air is $1.3 {kg/m}^{3})$

Discussion

176.	the ratio of swimmwer velocity to the river velocity is 2 , then the angle at which the swimmer aw swims with the water flow to cross the river in minimum toime i
Answer» the ratio of swimmwer velocity to the river velocity is 2 , then the angle at which the swimmer aw swims with the water flow to cross the river in minimum toime i

Discussion

177.	ntTh upper half of an inclined plane of inclination theta is perfectly smooth while the lower half is rough.A block starting from rest at the top of the plane will again come to rest at the bottom ,if coefficient of friction between the block and the lower half of the plane is given by?n
Answer» ntTh upper half of an inclined plane of inclination theta is perfectly smooth while the lower half is rough.A block starting from rest at the top of the plane will again come to rest at the bottom ,if coefficient of friction between the block and the lower half of the plane is given by?n

Discussion

178.	Describe an experiment to determine the density of a liquid?
Answer» Describe an experiment to determine the density of a liquid?

Discussion

179.	How conductivity of materials depend on temperature
Answer» How conductivity of materials depend on temperature

Discussion

180.	Suppose there is a uniform electric field E =20V/m. If a negative charge moves in the -x direction,does the electric potential increase or decrease
Answer» Suppose there is a uniform electric field E =20V/m. If a negative charge moves in the -x direction,does the electric potential increase or decrease

Discussion

181.	Explain why a charged body loses its charge if we touch it with our hand.
Answer» Explain why a charged body loses its charge if we touch it with our hand.

Discussion

182.	upper half and lower half of a thin convex lens are having focal length f and 2f. a point object O is on the principal axis at a large distance from lens as shown in the figure. number of images formed by the lens on the principal axis is
Answer» upper half and lower half of a thin convex lens are having focal length f and 2f. a point object O is on the principal axis at a large distance from lens as shown in the figure. number of images formed by the lens on the principal axis is

Discussion

183.	A person measures the depth of a well by measuring the time interval between dropping a stone and receiving the sound of impact with the bottom of the well. The error in his measurements of time(△ T) is 0.01 second and he measures the depth of the well to be equal to 20 m. Take acceleration due to gravity equal to 10 m/s² and velocity of sound to be equal to 300 metres per second, then find the fractional error in the measurement of length , △ L/L in percentage
Answer» A person measures the depth of a well by measuring the time interval between dropping a stone and receiving the sound of impact with the bottom of the well. The error in his measurements of time(△ T) is 0.01 second and he measures the depth of the well to be equal to 20 m. Take acceleration due to gravity equal to 10 m/s² and velocity of sound to be equal to 300 metres per second, then find the fractional error in the measurement of length , △ L/L in percentage

Discussion

184.	What will happen at molecular level if two bodies one hot and one cool are brought in contact with each other?
Answer» What will happen at molecular level if two bodies one hot and one cool are brought in contact with each other?

Discussion

185.	14. How many iron atom are present in stainless steel ball bearing having a radius of .254cm ? The stainless steel contains 85.6% Fe by weight and has density 7.75g/cm3 1. The initial acceleration of the moon towards the earth will be. 2. The acceleration of the moon just before it strikes the earth
Answer» 14. How many iron atom are present in stainless steel ball bearing having a radius of .254cm ? The stainless steel contains 85.6% Fe by weight and has density 7.75g/cm3 1. The initial acceleration of the moon towards the earth will be. 2. The acceleration of the moon just before it strikes the earth

Discussion

186.	A boy while playing with two magnets, got familiar with their attractive and repulsive properties. He observed that the magnets are attracting and repelling each other from a distance. From this, we can conclude that:
Answer» A boy while playing with two magnets, got familiar with their attractive and repulsive properties. He observed that the magnets are attracting and repelling each other from a distance. From this, we can conclude that:

Discussion

187.	Question 19Derive the unit a force using the second law of motion. A force of 5 N produces an acceleration of 8 ms−2 on a mass m1 and an acceleration of 24 ms−2 on mass m2. What acceleration would the same force provide if both the masses are tired together?
Answer» Question 19 Derive the unit a force using the second law of motion. A force of 5 N produces an acceleration of $8 m s^{- 2}$ on a mass $m_{1}$ and an acceleration of $24 m s^{- 2}$ on mass $m_{2}$ . What acceleration would the same force provide if both the masses are tired together?

Discussion

188.	Remainder theorem proof
Answer» Remainder theorem proof

Discussion

189.	The charge can be generated by conduction or induction or friction ?
Answer» The charge can be generated by conduction or induction or friction ?

Discussion

190.	What is net force?
Answer» What is net force?

Discussion

191.	A ball is released from a height of x meters. Given that it bounces back to half of its original height. Find the product of heights after eight bounces. [4 MARKS]
Answer» A ball is released from a height of $x$ meters. Given that it bounces back to half of its original height. Find the product of heights after eight bounces. [4 MARKS]

Discussion

192.	Iron on burning
Answer» Iron on burning

Discussion

193.	What is the conventional direction of electric current? How does it differ from the direction of flow of electrons?
Answer» What is the conventional direction of electric current? How does it differ from the direction of flow of electrons?

Discussion

194.	An aluminium rod of 10 m length at 20oC expand when the temperature is changed from 0oC to 100oC. The resultant change due to rod expansion (in mm) is[thermal expansion coefficient (γ) of at 20oC is 25×10−6(1/oC)]25
Answer» An aluminium rod of $10 m$ length at $20^{o} C$ expand when the temperature is changed from $0^{o} C$ to $100^{o} C$ . The resultant change due to rod expansion (in mm) is $[t h e r m a l e x p a n s i o n c o e f f i c i e n t (γ) o f a t 20^{o} C i s 25 \times 10^{- 6} (1 /^{o} C)]$ 25

Discussion

195.	Which of the following graph shows the variation in the volume of 1 g of water with the temperature in the range from 0 ∘C to 10 ∘C?
Answer» Which of the following graph shows the variation in the volume of 1 g of water with the temperature in the range from $0^{\circ} C$ to $10^{\circ} C$ ?

Discussion

196.	A charged particle goes undeflected in a region containing electric and magnetic field It is possible that V is parallel to E ,E is parallel to B or E is not parallel to B ( this is wat given in the pckg as illustration) But how come E Is parallel to B for an undeflected particle??
Answer» A charged particle goes undeflected in a region containing electric and magnetic field It is possible that V is parallel to E ,E is parallel to B or E is not parallel to B ( this is wat given in the pckg as illustration) But how come E Is parallel to B for an undeflected particle??

Discussion

197.	Buoyant force = ___
Answer» Buoyant force = ___

Discussion

198.	Find the volume of the object if, the volume of each block is 2 cm3.
Answer» Find the volume of the object if, the volume of each block is $2 c m^{3}$ .

Discussion

199.	At a given place a mercury barometer records a pressure of 0.70m of Hg . What would be the height of water column if mercury in barometer is replaced by water ? Take density of mercury to be 13.6 ×10pawer3 kg m-3 .
Answer» At a given place a mercury barometer records a pressure of 0.70m of Hg . What would be the height of water column if mercury in barometer is replaced by water ? Take density of mercury to be 13.6 ×10pawer3 kg m-3 .

Discussion

200.	A standing wave is formed when ____.
Answer» A standing wave is formed when ____.

Discussion

Explore topic-wise InterviewSolutions in .

a capacitor of plate area a and seperation d is filled with 2 dielectrics of dielectric cons†an t k=6 k2=4.new capaci†an ce will

Which of the following objects should not be chrome-plated ? (a) car bumper (b) gas stove (c) frying pan (d) bicycle bell

86.A capacitor of capacitance c carrying charge q is connected to a source of emf e .Finally the charge on capacitor would be ? 1 q 2 q+ce 3 ce 4 none of these

State which part of speech is the underlined word. The horse was not properly saddled.

For a electrolytic conductor, the transport number of cation is given by t+ is the transport number of cationt− is the transport number of anion

Is it safe for an electrician to carry out electrical repairs outdoors during a heavy downpour? Explain. [3 MARKS]

What is the principle of rainbow formation??(1)Dispersion (2)Reflection (3)Scattering (4)Both (1) and (2)

Dear sir/Ma'am I have a problem in this question Q. A load suspended from a spring and its other end is on a hook fix to a wall , in this case mechanical force is acting ?

when 4gm of a mixture of NaHCO3 and NaCl is heated , 0.66gm CO2 gas is evolved .determine the percentage composition of the mixture?

Which of the following would be least likely to sink into the soft ground?

In a barber's shop, two plane mirrors are placed : (a) perpendicular to each other (b) parallel to each other (c) at an angle of 60∘ between them (d) at an angle of 45∘ between them.

When a book placed on a horizontal desk is pushed towards right, in which direction does the force of friction act on the book?

An electrical appliance of 500 W is used for 2 hours per day. Calculate the energy consumed in a day.1

Describe the process of purification of impure copper using electroplating. [5 MARKS]

Two ___cords are stretched across the voice box or larynx in such a way that it leaves a narrow slit between them for the passage of air

121. When an object can be seen with one eye,why is it that we have a pair of eyes

Orion has monomeric unit

6.Whena soap bubble is charged ,excess pressure inside it (assume radius doesn"t change) DECREASES

A train consisting of 30 wagons each of 15 tons and ispulled by an engine of power 90 KW. If the frictionalforce and air resistance force offered per ton of thetrain is 12 N then the maximum velocity with whichthe train can travel is

What happens to the friction between the two surfaces when the lubricant is applied between the two surfaces?

ntblock-2 having mass m and charge Q is held stationary in air with the help of block-1 carrying some charge. If the distance between the blocks is h, then the charge on block-1 isn

3. A body of 18kg moving with 18 m/s. Find the Kinetic energy of the body?

Good Evening Sir,I want to put an question regarding the layers of atmosphere that there are how many layers present in atmosphere because I don't find in rest pages.And I have asked my mentor too.

The lift force acting on the wing of an aeroplane is 2275 N. If the area of the wing is 5 m2 and velocity of air on the lower surface of the wing is 30 m/s, velocity of air on the upper surface of the wing is (density of air is 1.3 kg/m3)

the ratio of swimmwer velocity to the river velocity is 2 , then the angle at which the swimmer aw swims with the water flow to cross the river in minimum toime i

ntTh upper half of an inclined plane of inclination theta is perfectly smooth while the lower half is rough.A block starting from rest at the top of the plane will again come to rest at the bottom ,if coefficient of friction between the block and the lower half of the plane is given by?n

Describe an experiment to determine the density of a liquid?

How conductivity of materials depend on temperature

Suppose there is a uniform electric field E =20V/m. If a negative charge moves in the -x direction,does the electric potential increase or decrease

Explain why a charged body loses its charge if we touch it with our hand.

upper half and lower half of a thin convex lens are having focal length f and 2f. a point object O is on the principal axis at a large distance from lens as shown in the figure. number of images formed by the lens on the principal axis is

What will happen at molecular level if two bodies one hot and one cool are brought in contact with each other?

A boy while playing with two magnets, got familiar with their attractive and repulsive properties. He observed that the magnets are attracting and repelling each other from a distance. From this, we can conclude that:

Question 19Derive the unit a force using the second law of motion. A force of 5 N produces an acceleration of 8 ms−2 on a mass m1 and an acceleration of 24 ms−2 on mass m2. What acceleration would the same force provide if both the masses are tired together?

Remainder theorem proof

The charge can be generated by conduction or induction or friction ?

What is net force?

A ball is released from a height of x meters. Given that it bounces back to half of its original height. Find the product of heights after eight bounces. [4 MARKS]

Iron on burning

What is the conventional direction of electric current? How does it differ from the direction of flow of electrons?

An aluminium rod of 10 m length at 20oC expand when the temperature is changed from 0oC to 100oC. The resultant change due to rod expansion (in mm) is[thermal expansion coefficient (γ) of at 20oC is 25×10−6(1/oC)]25

Which of the following graph shows the variation in the volume of 1 g of water with the temperature in the range from 0 ∘C to 10 ∘C?

A charged particle goes undeflected in a region containing electric and magnetic field It is possible that V is parallel to E ,E is parallel to B or E is not parallel to B ( this is wat given in the pckg as illustration) But how come E Is parallel to B for an undeflected particle??

Buoyant force = ___

Find the volume of the object if, the volume of each block is 2 cm3.

At a given place a mercury barometer records a pressure of 0.70m of Hg . What would be the height of water column if mercury in barometer is replaced by water ? Take density of mercury to be 13.6 ×10pawer3 kg m-3 .

A standing wave is formed when ____.