6277 + Interview Questions in Physics Page 24 InterviewSolution

1151.	Why is window AC kept at lower level as compared to split AC?
Answer» Why is window AC kept at lower level as compared to split AC?

Discussion

1152.	While drinking water we lift a glass of water up to a certain height.does the water in that glass also possess potential energy?
Answer» While drinking water we lift a glass of water up to a certain height.does the water in that glass also possess potential energy?

Discussion

1153.	A magnetic needle laying parallel to a magnetic field requires W units of work to turn it through 60 degree the torque needed to maintain the needle in this position will be
Answer» A magnetic needle laying parallel to a magnetic field requires W units of work to turn it through 60 degree the torque needed to maintain the needle in this position will be

Discussion

1154.	Which among the following instruments is used to look at objects above the water surface?
Answer» Which among the following instruments is used to look at objects above the water surface?

Discussion

1155.	Question 4At noon the sun appears white as(a) light is least scattered(b) all the colours of the white light are scattered away(c) blue colour is scattered the most(d) red colour is scattered the most
Answer» Question 4 At noon the sun appears white as (a) light is least scattered (b) all the colours of the white light are scattered away (c) blue colour is scattered the most (d) red colour is scattered the most

Discussion

1156.	Area of a circle whose radius is 8 m is
Answer» Area of a circle whose radius is 8 m is

Discussion

1157.	A ray of light makes an angle of 10 degree with the horizontal above it and strikes a plane mirror which is inclined at an angle θ to the horizontal. The angle θ for which the reflected ray becomes vertical is?
Answer» A ray of light makes an angle of 10 degree with the horizontal above it and strikes a plane mirror which is inclined at an angle θ to the horizontal. The angle θ for which the reflected ray becomes vertical is?

Discussion

1158.	Mass of two spheres are in the ratio 8:1. Assuming that both of them have the same density, find the ratio of their radii.
Answer» Mass of two spheres are in the ratio 8:1. Assuming that both of them have the same density, find the ratio of their radii.

Discussion

1159.	Railway tracks have gap between them to deal with
Answer» Railway tracks have gap between them to deal with

Discussion

1160.	Find the rate of heat flow through a cross-section of the tapered conical rod shown in figure (Temperature of the big end(θ2)> Temperature of the small end(θ1)), with radius r1 and r2 at the small and big end respectively. Thermal conductivity of the material of the rod is K.
Answer» Find the rate of heat flow through a cross-section of the tapered conical rod shown in figure $($ Temperature of the big end $(θ_{2}) >$ Temperature of the small end $(θ_{1}))$ , with radius $r_{1}$ and $r_{2}$ at the small and big end respectively. Thermal conductivity of the material of the rod is K.

Discussion

1161.	TSA of solid cylinder is 231 CM square and its TSA is 2/3of TSA .find the volume of cylinder?
Answer» TSA of solid cylinder is 231 CM square and its TSA is 2/3of TSA .find the volume of cylinder?

Discussion

1162.	An open organ pipe of length L vibrates in its fundamental mode. The pressure variation is maximum
Answer» An open organ pipe of length L vibrates in its fundamental mode. The pressure variation is maximum

Discussion

1163.	Write all symbols beginning with the letter C.
Answer» Write all symbols beginning with the letter C.

Discussion

1164.	True or false- The time period of a given pendulum is not constant.
Answer» True or false- The time period of a given pendulum is not constant.

Discussion

1165.	State three characteristics of a musical sound. On what factors do they depend.
Answer» State three characteristics of a musical sound. On what factors do they depend.

Discussion

1166.	Identify the waxing phase of the Moon from the following.
Answer» Identify the waxing phase of the Moon from the following.

Discussion

1167.	Which of the following natural phenomenon is the most destructive in terms of loss of life and property?
Answer» Which of the following natural phenomenon is the most destructive in terms of loss of life and property?

Discussion

1168.	Which form of energy is present in an avalanche along a mountainside?
Answer» Which form of energy is present in an avalanche along a mountainside?

1168.

Which form of energy is present in an avalanche along a mountainside?

Answer»

Which form of energy is present in an avalanche along a mountainside?

Discussion

1169.	An irregular solid, when placed on a centimetre graph paper and outline is drawn, covers 12 complete square and 8 incomplete squares. What is the approximate area bounded by the outline?
Answer» An irregular solid, when placed on a centimetre graph paper and outline is drawn, covers 12 complete square and 8 incomplete squares. What is the approximate area bounded by the outline?

Discussion

1170.	Question 115A train travels 14452 km in 172h. Find the speed of the train in km/h.
Answer» Question 115 A train travels $\frac{1445}{2}$ km in $\frac{17}{2}$ h. Find the speed of the train in km/h.

Discussion

1171.	Question 22Boojho made the circuit shown in the figure. He wanted to observe what happens when an electric current is passed through water. But he forgot to add a few drops of lemon juice to water. Will it make any difference to his observations? Explain.
Answer» Question 22 Boojho made the circuit shown in the figure. He wanted to observe what happens when an electric current is passed through water. But he forgot to add a few drops of lemon juice to water. Will it make any difference to his observations? Explain.

Discussion

1172.	a body moving along a straight line covers a dis†an ce in three equal parts with speed 2m/s,3m/s,4m/s then is average speed is
Answer» a body moving along a straight line covers a dis†an ce in three equal parts with speed 2m/s,3m/s,4m/s then is average speed is

Discussion

1173.	Why North Pole attract South Pole??
Answer» Why North Pole attract South Pole??

Discussion

1174.	Two plane mirrors are inclined at an angle of 70^° with each other. An object O is placed between them as shown in figure. Select the incorrect option.(1) Total number of images formed is 5 (2)Number of images formed by M2 is 2 (3)Number of images formed by M1 is 3 (4) Number of images formed by M1 is 2.
Answer» Two plane mirrors are inclined at an angle of 70^° with each other. An object O is placed between them as shown in figure. Select the incorrect option.(1) Total number of images formed is 5 (2)Number of images formed by M2 is 2 (3)Number of images formed by M1 is 3 (4) Number of images formed by M1 is 2.

Discussion

1175.	An electric bulb is connected to a cell through a switch as shown in figure. When the switch is brought to the ‘ON’ position, the bulb does not glow. What could be the possible reason/s for it?
Answer» An electric bulb is connected to a cell through a switch as shown in figure. When the switch is brought to the ‘ON’ position, the bulb does not glow. What could be the possible reason/s for it?

Discussion

1176.	An electric cell is a device that converts ___________ stored in it into electrical energy.
Answer» An electric cell is a device that converts ___________ stored in it into electrical energy.

Discussion

1177.	Write the vector laws?
Answer» Write the vector laws?

Discussion

1178.	Question 1What is a good source of energy?
Answer» Question 1 What is a good source of energy?

Discussion

1179.	To find the image of a point, the minimum number of rays that are required is ___
Answer» To find the image of a point, the minimum number of rays that are required is ___

Discussion

1180.	White light consists of seven colours.Can we mix the seven colours to get white light.Explain your answer
Answer» White light consists of seven colours.Can we mix the seven colours to get white light.Explain your answer

Discussion

1181.	The coeff. of performance of a refrigerator is 5. if the temp. inside freezer is -20^° C , the temp. of surrondings to which it rejects heat is a. 21^° C b.31^° C c.41^° C d.11^° C
Answer» The coeff. of performance of a refrigerator is 5. if the temp. inside freezer is -20^° C , the temp. of surrondings to which it rejects heat is a. 21^° C b.31^° C c.41^° C d.11^° C

Discussion

1182.	Himanshu was challenged by his friend Sushweta to differentiate between a plane, concave and convex mirror without touching them. He placed a candle in front of each of the mirrors and observed that they showed different behaviour. The mirror I always formed a diminished image, mirror II always formed an image of same height while for mirror III the image was enlarged when the candle was placed close to the mirror. Can you help him to identify them?
Answer» Himanshu was challenged by his friend Sushweta to differentiate between a plane, concave and convex mirror without touching them. He placed a candle in front of each of the mirrors and observed that they showed different behaviour. The mirror I always formed a diminished image, mirror II always formed an image of same height while for mirror III the image was enlarged when the candle was placed close to the mirror. Can you help him to identify them?

Discussion

1183.	Why do you feel warm when you rub your palms and touch your cheeks with them? [2 MARKS]
Answer» Why do you feel warm when you rub your palms and touch your cheeks with them? [2 MARKS]

Discussion

1184.	25.A particle executes SHM and its position varies with time as x=A sinwt. Its average speed during its motion from mean position to mid point of meam and extreme position is (1) Zero (2) 3Aw/pai (3)Aw/2pai (4)2Aw/pai
Answer» 25.A particle executes SHM and its position varies with time as x=A sinwt. Its average speed during its motion from mean position to mid point of meam and extreme position is (1) Zero (2) 3Aw/pai (3)Aw/2pai (4)2Aw/pai

Discussion

1185.	Explain the quantities that the terms Loudness and Pitch of sound depend on? Give units of those quantities.
Answer» Explain the quantities that the terms Loudness and Pitch of sound depend on? Give units of those quantities.

Discussion

1186.	What is an electromagnet?
Answer» What is an electromagnet?

Discussion

1187.	You are given a U shaped soft iron piece, insulated copper wire, and a battery. Draw a circuit diagram to make a horseshoe magnet.
Answer» You are given a U shaped soft iron piece, insulated copper wire, and a battery. Draw a circuit diagram to make a horseshoe magnet.

Discussion

1188.	When is the cyclone warning issued and which agencies are involved in it?
Answer» When is the cyclone warning issued and which agencies are involved in it?

Discussion

1189.	Changes involve energy. Justify the statement.
Answer» Changes involve energy. Justify the statement.

Discussion

1190.	A ship equipped with a sonar produces an ultrasonic sound wave. The wave took 2 s to reach the receiver after being reflected by a sunken ship directly below it. If the velocity of waves in sea water is 1450 m/s, find the depth at which sunken ship is located.
Answer» A ship equipped with a sonar produces an ultrasonic sound wave. The wave took 2 s to reach the receiver after being reflected by a sunken ship directly below it. If the velocity of waves in sea water is 1450 m/s, find the depth at which sunken ship is located.

Discussion

1191.

Lookat Figure. Mark where the heat is beingtransferred by conduction, by convection and by radiation.

Answer»

Look
at Figure. Mark where the heat is being
transferred by conduction, by convection and by radiation.

Discussion

1192.	calculate molal depression cons†an t of solvent , which has freezing point 16.6^{0 } celsius, andblatent heat of fusion 180.7
Answer» calculate molal depression cons†an t of solvent , which has freezing point 16.6^{0 } celsius, andblatent heat of fusion 180.7

Discussion

1193.	Two equal charges are placed at a separation of 1 m. What should be the magnitude of the charges so that the force between them equals the weight of a 50 kg person ?(Take g=10 m/s2)
Answer» Two equal charges are placed at a separation of $1 m$ . What should be the magnitude of the charges so that the force between them equals the weight of a $50 kg$ person ? (Take $g = 10 {m/s}^{2}$ )

Discussion

1194.	The height of a mercury barometer is 75 cm at sea level and 50 cm at the top of a hill. Ratio of density of mercury to that of air is 104. The height of the hill is
Answer» The height of a mercury barometer is 75 cm at sea level and 50 cm at the top of a hill. Ratio of density of mercury to that of air is $10^{4}$ . The height of the hill is

Discussion

1195.	11.When the velocity of a relativistic charged particle what happens to its increases its specific charge
Answer» 11.When the velocity of a relativistic charged particle what happens to its increases its specific charge

Discussion

1196.	the equilibrium cons†an t for the reaction ,2MnO_4^-+6H^{+_{}}+5H_2C_2O_4=2Mn^{+2}+8H_2O+10CO_2 is approximately---?Given that,{E^0}_{CO_2} _{/C_2O_4^{2-}}=-0.49V,{E^0}_{MnO_4^-/Mn^{2+}}=1.51V
Answer» the equilibrium cons†an t for the reaction ,2MnO_4^-+6H^{+_{}}+5H_2C_2O_4=2Mn^{+2}+8H_2O+10CO_2 is approximately---?Given that,{E^0}_{CO_2} _{/C_2O_4^{2-}}=-0.49V,{E^0}_{MnO_4^-/Mn^{2+}}=1.51V

Discussion

1197.	A truck moves a distance of 50 km. It covers first half of the distance at speed of 200m/s and second half at speed v. if average speed of truck is 100 m/s then what is the value of v?
Answer» A truck moves a distance of 50 km. It covers first half of the distance at speed of 200m/s and second half at speed v. if average speed of truck is 100 m/s then what is the value of v?

Discussion

1198.	In the given graph
Answer» In the given graph

1198.

In the given graph

Answer»

In the given graph

Discussion

1199.	Light with an energy flux of 25×104 Wm−2 falls on a perfectly surface at normal incidence. If the surface area is 15 cm2, the average force exerted on the surface is
Answer» Light with an energy flux of $25 \times 10^{4} {Wm}^{- 2}$ falls on a perfectly surface at normal incidence. If the surface area is $15 {cm}^{2}$ , the average force exerted on the surface is

Discussion

1200.	Q-Which type of heat transfer takes place in cooking food in a microwave?
Answer» Q-Which type of heat transfer takes place in cooking food in a microwave?

Discussion

Explore topic-wise InterviewSolutions in .

Why is window AC kept at lower level as compared to split AC?

While drinking water we lift a glass of water up to a certain height.does the water in that glass also possess potential energy?

A magnetic needle laying parallel to a magnetic field requires W units of work to turn it through 60 degree the torque needed to maintain the needle in this position will be

Which among the following instruments is used to look at objects above the water surface?

Question 4At noon the sun appears white as(a) light is least scattered(b) all the colours of the white light are scattered away(c) blue colour is scattered the most(d) red colour is scattered the most

Area of a circle whose radius is 8 m is

A ray of light makes an angle of 10 degree with the horizontal above it and strikes a plane mirror which is inclined at an angle θ to the horizontal. The angle θ for which the reflected ray becomes vertical is?

Mass of two spheres are in the ratio 8:1. Assuming that both of them have the same density, find the ratio of their radii.

Railway tracks have gap between them to deal with

Find the rate of heat flow through a cross-section of the tapered conical rod shown in figure (Temperature of the big end(θ2)&gt; Temperature of the small end(θ1)), with radius r1 and r2 at the small and big end respectively. Thermal conductivity of the material of the rod is K.

TSA of solid cylinder is 231 CM square and its TSA is 2/3of TSA .find the volume of cylinder?

An open organ pipe of length L vibrates in its fundamental mode. The pressure variation is maximum

Write all symbols beginning with the letter C.

True or false- The time period of a given pendulum is not constant.

State three characteristics of a musical sound. On what factors do they depend.

Identify the waxing phase of the Moon from the following.

Which of the following natural phenomenon is the most destructive in terms of loss of life and property?

Which form of energy is present in an avalanche along a mountainside?

An irregular solid, when placed on a centimetre graph paper and outline is drawn, covers 12 complete square and 8 incomplete squares. What is the approximate area bounded by the outline?

Question 115A train travels 14452 km in 172h. Find the speed of the train in km/h.

Question 22Boojho made the circuit shown in the figure. He wanted to observe what happens when an electric current is passed through water. But he forgot to add a few drops of lemon juice to water. Will it make any difference to his observations? Explain.

a body moving along a straight line covers a dis†an ce in three equal parts with speed 2m/s,3m/s,4m/s then is average speed is

Why North Pole attract South Pole??

An electric bulb is connected to a cell through a switch as shown in figure. When the switch is brought to the ‘ON’ position, the bulb does not glow. What could be the possible reason/s for it?

An electric cell is a device that converts ___________ stored in it into electrical energy.

Write the vector laws?

Question 1What is a good source of energy?

To find the image of a point, the minimum number of rays that are required is ___

White light consists of seven colours.Can we mix the seven colours to get white light.Explain your answer

The coeff. of performance of a refrigerator is 5. if the temp. inside freezer is -20^° C , the temp. of surrondings to which it rejects heat is a. 21^° C b.31^° C c.41^° C d.11^° C

Why do you feel warm when you rub your palms and touch your cheeks with them? [2 MARKS]

25.A particle executes SHM and its position varies with time as x=A sinwt. Its average speed during its motion from mean position to mid point of meam and extreme position is (1) Zero (2) 3Aw/pai (3)Aw/2pai (4)2Aw/pai

Explain the quantities that the terms Loudness and Pitch of sound depend on? Give units of those quantities.

What is an electromagnet?

You are given a U shaped soft iron piece, insulated copper wire, and a battery. Draw a circuit diagram to make a horseshoe magnet.

When is the cyclone warning issued and which agencies are involved in it?

Changes involve energy. Justify the statement.

A ship equipped with a sonar produces an ultrasonic sound wave. The wave took 2 s to reach the receiver after being reflected by a sunken ship directly below it. If the velocity of waves in sea water is 1450 m/s, find the depth at which sunken ship is located.

Lookat Figure. Mark where the heat is beingtransferred by conduction, by convection and by radiation.

calculate molal depression cons†an t of solvent , which has freezing point 16.6^{0 } celsius, andblatent heat of fusion 180.7

Two equal charges are placed at a separation of 1 m. What should be the magnitude of the charges so that the force between them equals the weight of a 50 kg person ?(Take g=10 m/s2)

The height of a mercury barometer is 75 cm at sea level and 50 cm at the top of a hill. Ratio of density of mercury to that of air is 104. The height of the hill is

11.When the velocity of a relativistic charged particle what happens to its increases its specific charge

the equilibrium cons†an t for the reaction ,2MnO_4^-+6H^{+_{}}+5H_2C_2O_4=2Mn^{+2}+8H_2O+10CO_2 is approximately---?Given that,{E^0}_{CO_2} _{/C_2O_4^{2-}}=-0.49V,{E^0}_{MnO_4^-/Mn^{2+}}=1.51V

A truck moves a distance of 50 km. It covers first half of the distance at speed of 200m/s and second half at speed v. if average speed of truck is 100 m/s then what is the value of v?

In the given graph

Light with an energy flux of 25×104 Wm−2 falls on a perfectly surface at normal incidence. If the surface area is 15 cm2, the average force exerted on the surface is

Q-Which type of heat transfer takes place in cooking food in a microwave?

Find the rate of heat flow through a cross-section of the tapered conical rod shown in figure (Temperature of the big end(θ2)> Temperature of the small end(θ1)), with radius r1 and r2 at the small and big end respectively. Thermal conductivity of the material of the rod is K.