9478 + Interview Questions in Physics Page 112 InterviewSolution

5551.	One fine day upto 12:00 noon, a pendulum and a digital clock show same time at 30^oC, IF sudenly temp. is increased to 50^oC THEN at 3pm it is decreased to 20^oC,find THE TIME WHEN BOTH CLOCKS WILL SHOW the saame time agaiin.
Answer» One fine day upto 12:00 noon, a pendulum and a digital clock show same time at 30^oC, IF sudenly temp. is increased to 50^oC THEN at 3pm it is decreased to 20^oC,find THE TIME WHEN BOTH CLOCKS WILL SHOW the saame time agaiin.

Discussion

5552.	10.An object of length of 6 cm is placed on the principle axis of concave mirror of focal length f at distance of 4 f. The length of the image will be (A) 2 cm (B) 12 cm (C) 4 cm (D) 1.2 cm
Answer» 10.An object of length of 6 cm is placed on the principle axis of concave mirror of focal length f at distance of 4 f. The length of the image will be (A) 2 cm (B) 12 cm (C) 4 cm (D) 1.2 cm

Discussion

5553.	EXplain spherical mirror and two types of mirror
Answer» EXplain spherical mirror and two types of mirror

Discussion

5554.	The tension in wire is decreased by 19% the percentage decrease in freqency will be
Answer» The tension in wire is decreased by 19% the percentage decrease in freqency will be

Discussion

5555.	Nose bleeding is a common phenomenon at high altitudes. Which of the following reason correctly describes this fact?
Answer» Nose bleeding is a common phenomenon at high altitudes. Which of the following reason correctly describes this fact?

Discussion

5556.	A man applies a force of 20 N to kill a fly with a flat stick. If the area over which the force is acting is 2 cm2, calculate the pressure on that area.
Answer» A man applies a force of 20 N to kill a fly with a flat stick. If the area over which the force is acting is 2 $c m^{2}$ , calculate the pressure on that area.

Discussion

5557.	Give Scientific reasons.a. Tungsten metal is used to make a solenoid type coil in an electric bulb.b. In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster etc, an alloy such as Nichrome is used, not pure metals.c. For electric power transmission, copper or aluminium wire is used.d. In practice the unit kWh is used for the measurement of electrical energy, rather than joule.
Answer» Give Scientific reasons. a. Tungsten metal is used to make a solenoid type coil in an electric bulb. b. In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster etc, an alloy such as Nichrome is used, not pure metals. c. For electric power transmission, copper or aluminium wire is used. d. In practice the unit kWh is used for the measurement of electrical energy, rather than joule.

Discussion

5558.	In which state is the LPG in the cylinder of the cooking stove?
Answer» In which state is the LPG in the cylinder of the cooking stove?

Discussion

5559.	For which range of frequencies, human ears are more sensitive?
Answer» For which range of frequencies, human ears are more sensitive?

Discussion

5560.	A boy makes a ruler with graduation in centimetre on it .To what accuracy is ruler can measured? How can this accuracy be increased?
Answer» A boy makes a ruler with graduation in centimetre on it .To what accuracy is ruler can measured? How can this accuracy be increased?

Discussion

5561.	What is relative motion
Answer» What is relative motion

Discussion

5562.	If work done in moving a charge of 20 mC from infinity to a point O in an electric field is 15J, then what is the electric potential of this point.
Answer» If work done in moving a charge of 20 mC from infinity to a point O in an electric field is 15J, then what is the electric potential of this point.

Discussion

5563.	A ball is moving along a horizontal surface. The ball comes to rest after some time. Which force is responsible for stopping the motion of the ball?
Answer» A ball is moving along a horizontal surface. The ball comes to rest after some time. Which force is responsible for stopping the motion of the ball?

Discussion

5564.	A simple harmonic oscillator has an amplitude a and time period T. The time required by it to travel from x = a to x = a / 2 is
Answer» A simple harmonic oscillator has an amplitude a and time period T. The time required by it to travel from x = a to x = a / 2 is

Discussion

5565.	When a 40v/m electric field is produced inside a conductor then 210000A/m-2 current density is established in it.Resistivity of the conductor is.
Answer» When a 40v/m electric field is produced inside a conductor then 210000A/m-2 current density is established in it.Resistivity of the conductor is.

Discussion

5566.	Fill in the blanks. (a) There is magnetic ………… between like poles. (b) Stainless steel is a ………… substance. (c) There is mutual attraction between ………… poles of magnets. (d) There is maximum magnetic force near the ………… of a magnet.
Answer» Fill in the blanks. (a) There is magnetic ………… between like poles. (b) Stainless steel is a ………… substance. (c) There is mutual attraction between ………… poles of magnets. (d) There is maximum magnetic force near the ………… of a magnet.

5566.

Fill in the blanks. (a) There is magnetic ………… between like poles. (b) Stainless steel is a ………… substance. (c) There is mutual attraction between ………… poles of magnets. (d) There is maximum magnetic force near the ………… of a magnet.

Answer»

Fill in the blanks.

(a) There is magnetic ………… between like poles.

(b) Stainless steel is a ………… substance.

(c) There is mutual attraction between ………… poles of magnets.

(d) There is maximum magnetic force near the ………… of a magnet.

Discussion

5567.	Which one of the following places is unlikely to be affected by a cyclone?
Answer» Which one of the following places is unlikely to be affected by a cyclone?

Discussion

5568.	In which in which situation the average velocity is V1 Plus V2 by 2
Answer» In which in which situation the average velocity is V1 Plus V2 by 2

Discussion

5569.	If we walk towards a mirror :
Answer» If we walk towards a mirror :

Discussion

5570.	Why is zinc coating used in iron bridges?
Answer» Why is zinc coating used in iron bridges?

Discussion

5571.	Identify the translucent slab in the given picture:
Answer» Identify the translucent slab in the given picture:

Discussion

5572.	Each side of a box made of metal sheet in cubic shape is a at room temperature T. The coefficient of linear expansion of the metal sheet is ‘α’. The metal sheet is heated uniformly, by a small temperature ΔT, so that its new temperature is T+ΔT. Calculate the increase in the volume of the metal box.
Answer» Each side of a box made of metal sheet in cubic shape is $a$ at room temperature $T$ . The coefficient of linear expansion of the metal sheet is ‘ $α$ ’. The metal sheet is heated uniformly, by a small temperature $Δ$ $T$ , so that its new temperature is $T + Δ$ $T$ . Calculate the increase in the volume of the metal box.

Discussion

5573.	A chain is placed on a table. Now, one-third of the length of the chain is suspended from the table. Here, find the coefficient of friction between the table and the chain.
Answer» A chain is placed on a table. Now, one-third of the length of the chain is suspended from the table. Here, find the coefficient of friction between the table and the chain.

Discussion

5574.	A spherical liquid drop of radius R is divided into eight equal droplets. If surface tension is T, then the work done in this process will be
Answer» A spherical liquid drop of radius R is divided into eight equal droplets. If surface tension is T, then the work done in this process will be

5574.

A spherical liquid drop of radius R is divided into eight equal droplets. If surface tension is T, then the work done in this process will be

Answer»

A spherical liquid drop of radius R is divided into eight equal droplets. If surface tension is T, then the work done in this process will be

Discussion

5575.	What is the difference between change in magnitude of velocity and magnitude of change in velocity
Answer» What is the difference between change in magnitude of velocity and magnitude of change in velocity

Discussion

5576.	16 The no. Of moles of KMno4 that will be needed to react with one mole of sulphite ion in acidic solution
Answer» 16 The no. Of moles of KMno4 that will be needed to react with one mole of sulphite ion in acidic solution

Discussion

5577.	Choose the correct alternative in the following question:If 3x=6561, then 3x-3=a 81 b 243 c 729 d 27
Answer» Choose the correct alternative in the following question: $If 3^{x} = 6561, then 3^{x - 3} = (a) 81 (b) 243 (c) 729 (d) 27$

Discussion

5578.	Suppose you go to an amusement park and there you find a ride called the rotor the circular room is spinning and you and other riders are stuck to the circular wall we know earth pull all object towards it then why don't people fall even when though there is no floor to support you
Answer» Suppose you go to an amusement park and there you find a ride called the rotor the circular room is spinning and you and other riders are stuck to the circular wall we know earth pull all object towards it then why don't people fall even when though there is no floor to support you

Discussion

5579.	5. In the figure the block A and B are of masses 3kg and 2kg respectively coefficient of friction between two blocks A and B is 0.3 the table is smooth. Find acc. And tension in the two strings
Answer» 5. In the figure the block A and B are of masses 3kg and 2kg respectively coefficient of friction between two blocks A and B is 0.3 the table is smooth. Find acc. And tension in the two strings

Discussion

5580.	Question 33Electrical wires have a coating of an insulating material. The material, generally used is(a) Sulphur(b) Graphite(c) PVC(d) All can be used
Answer» Question 33 Electrical wires have a coating of an insulating material. The material, generally used is (a) Sulphur (b) Graphite (c) PVC (d) All can be used

Discussion

5581.	A student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He can get a correct measure of the angle of incidence and the angle of emergence by following the labelling indicated in figure:(1) A(2) B(3) C(4) D
Answer» A student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He can get a correct measure of the angle of incidence and the angle of emergence by following the labelling indicated in figure: (1) A (2) B (3) C (4) D

Discussion

5582.	What is polymers and monomers of silicone? Where we can use it in our daily lives? Who and how it was discovered?
Answer» What is polymers and monomers of silicone? Where we can use it in our daily lives? Who and how it was discovered?

Discussion

5583.	Which of the following is equivalent to 1 pascal?
Answer» Which of the following is equivalent to 1 pascal?

Discussion

5584.	A plane has a take-off speed of 120 ms−1 and it reaches that speed after covering 2400 m. Determine the acceleration of the plane (assuming it to be constant) and the time required to reach this speed?
Answer» A plane has a take-off speed of 120 $m s^{- 1}$ and it reaches that speed after covering 2400 m. Determine the acceleration of the plane (assuming it to be constant) and the time required to reach this speed?

Discussion

5585.	In going from solid to liquid the system
Answer» In going from solid to liquid the system

Discussion

5586.	two infinitely long straight wires of linear charge densities lamba 1 and lambda 2 are placed mutually perpendicular at seperation d. the electric force of interaction between them is
Answer» two infinitely long straight wires of linear charge densities lamba 1 and lambda 2 are placed mutually perpendicular at seperation d. the electric force of interaction between them is

Discussion

5587.	Light year is a unit of:
Answer» Light year is a unit of:

Discussion

5588.	-112/120+105/130= FIND the value
Answer» -112/120+105/130= FIND the value

Discussion

5589.	What type of technology does a walkie talkie use for communication.
Answer» What type of technology does a walkie talkie use for communication.

Discussion

5590.	Regarding Assertion [A] and Reason [R], Choose the correct option______. Assertion [A]: Muscles can only pull on structures not push. Reason [R]: Balancing muscles are present.
Answer» Regarding Assertion [A] and Reason [R], Choose the correct option______. Assertion [A]: Muscles can only pull on structures not push. Reason [R]: Balancing muscles are present.

5590.

Regarding Assertion [A] and Reason [R], Choose the correct option______. Assertion [A]: Muscles can only pull on structures not push. Reason [R]: Balancing muscles are present.

Answer»

Regarding Assertion [A] and Reason [R], Choose the correct option______.

Assertion [A]: Muscles can only pull on structures not push.

Reason [R]: Balancing muscles are present.

Discussion

5591.	Name the most common application of the chemical effect of electric current.
Answer» Name the most common application of the chemical effect of electric current.

Discussion

5592.	2. The standard gibbs energy change for the rexn.H2O=(H+) +(OH-) at 25degree celcius
Answer» 2. The standard gibbs energy change for the rexn.H2O=(H+) +(OH-) at 25degree celcius

Discussion

5593.	the vant hoff factor 1.for a dilute solution of strong electrolyte K4[Fe(CN)6]
Answer» the vant hoff factor 1.for a dilute solution of strong electrolyte K4[Fe(CN)6]

Discussion

5594.	List down any three uses of magnet.
Answer» List down any three uses of magnet.

Discussion

5595.	When two different stones of masses 8 kg and 16 kg are taken to the same height, then ratio of their potential energies respectively is.
Answer» When two different stones of masses $8 k g$ and $16 k g$ are taken to the same height, then ratio of their potential energies respectively is.

Discussion

5596.	What is the frequency of the sound produced when the vocal cords are : (a) tight and thin (b) loose and thick?
Answer» What is the frequency of the sound produced when the vocal cords are : (a) tight and thin (b) loose and thick?

Discussion

5597.	Match the following sound of objects with their suitable decibels.
Answer» Match the following sound of objects with their suitable decibels.

Discussion

5598.	In which direction will the sun rise on Venus?
Answer» In which direction will the sun rise on Venus?

Discussion

5599.	A cylindrical capacitor has two co-axial cylinders of length 20cm and radii 1.5cm and 1.6cm. The outer cylinder is earthed and inner cylinder is given a charge of 4 micro coulomb.Then what will be the capacitance of the system (neglect end effects)?
Answer» A cylindrical capacitor has two co-axial cylinders of length 20cm and radii 1.5cm and 1.6cm. The outer cylinder is earthed and inner cylinder is given a charge of 4 micro coulomb.Then what will be the capacitance of the system (neglect end effects)?

Discussion

5600.	A ray of light is incident on the air-glass interface from air to glass. Which of the given angles cannot be a Brewster's angle (θB)?
Answer» A ray of light is incident on the air-glass interface from air to glass. Which of the given angles cannot be a Brewster's angle $(θ_{B})$ ?

Discussion

Explore topic-wise InterviewSolutions in .

One fine day upto 12:00 noon, a pendulum and a digital clock show same time at 30^oC, IF sudenly temp. is increased to 50^oC THEN at 3pm it is decreased to 20^oC,find THE TIME WHEN BOTH CLOCKS WILL SHOW the saame time agaiin.

10.An object of length of 6 cm is placed on the principle axis of concave mirror of focal length f at distance of 4 f. The length of the image will be (A) 2 cm (B) 12 cm (C) 4 cm (D) 1.2 cm

EXplain spherical mirror and two types of mirror

The tension in wire is decreased by 19% the percentage decrease in freqency will be

Nose bleeding is a common phenomenon at high altitudes. Which of the following reason correctly describes this fact?

A man applies a force of 20 N to kill a fly with a flat stick. If the area over which the force is acting is 2 cm2, calculate the pressure on that area.

In which state is the LPG in the cylinder of the cooking stove?

For which range of frequencies, human ears are more sensitive?

A boy makes a ruler with graduation in centimetre on it .To what accuracy is ruler can measured? How can this accuracy be increased?

What is relative motion

If work done in moving a charge of 20 mC from infinity to a point O in an electric field is 15J, then what is the electric potential of this point.

A ball is moving along a horizontal surface. The ball comes to rest after some time. Which force is responsible for stopping the motion of the ball?

A simple harmonic oscillator has an amplitude a and time period T. The time required by it to travel from x = a to x = a / 2 is

When a 40v/m electric field is produced inside a conductor then 210000A/m-2 current density is established in it.Resistivity of the conductor is.

Fill in the blanks. (a) There is magnetic ………… between like poles. (b) Stainless steel is a ………… substance. (c) There is mutual attraction between ………… poles of magnets. (d) There is maximum magnetic force near the ………… of a magnet.

Which one of the following places is unlikely to be affected by a cyclone?

In which in which situation the average velocity is V1 Plus V2 by 2

If we walk towards a mirror :

Why is zinc coating used in iron bridges?

Identify the translucent slab in the given picture:

A chain is placed on a table. Now, one-third of the length of the chain is suspended from the table. Here, find the coefficient of friction between the table and the chain.

A spherical liquid drop of radius R is divided into eight equal droplets. If surface tension is T, then the work done in this process will be

What is the difference between change in magnitude of velocity and magnitude of change in velocity

16 The no. Of moles of KMno4 that will be needed to react with one mole of sulphite ion in acidic solution

Choose the correct alternative in the following question:If 3x=6561, then 3x-3=a 81 b 243 c 729 d 27

Suppose you go to an amusement park and there you find a ride called the rotor the circular room is spinning and you and other riders are stuck to the circular wall we know earth pull all object towards it then why don't people fall even when though there is no floor to support you

5. In the figure the block A and B are of masses 3kg and 2kg respectively coefficient of friction between two blocks A and B is 0.3 the table is smooth. Find acc. And tension in the two strings

Question 33Electrical wires have a coating of an insulating material. The material, generally used is(a) Sulphur(b) Graphite(c) PVC(d) All can be used

A student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He can get a correct measure of the angle of incidence and the angle of emergence by following the labelling indicated in figure:(1) A(2) B(3) C(4) D

What is polymers and monomers of silicone? Where we can use it in our daily lives? Who and how it was discovered?

Which of the following is equivalent to 1 pascal?

A plane has a take-off speed of 120 ms−1 and it reaches that speed after covering 2400 m. Determine the acceleration of the plane (assuming it to be constant) and the time required to reach this speed?

In going from solid to liquid the system

two infinitely long straight wires of linear charge densities lamba 1 and lambda 2 are placed mutually perpendicular at seperation d. the electric force of interaction between them is

Light year is a unit of:

-112/120+105/130= FIND the value

What type of technology does a walkie talkie use for communication.

Regarding Assertion [A] and Reason [R], Choose the correct option______. Assertion [A]: Muscles can only pull on structures not push. Reason [R]: Balancing muscles are present.

Name the most common application of the chemical effect of electric current.

2. The standard gibbs energy change for the rexn.H2O=(H+) +(OH-) at 25degree celcius

the vant hoff factor 1.for a dilute solution of strong electrolyte K4[Fe(CN)6]

List down any three uses of magnet.

When two different stones of masses 8 kg and 16 kg are taken to the same height, then ratio of their potential energies respectively is.

What is the frequency of the sound produced when the vocal cords are : (a) tight and thin (b) loose and thick?

Match the following sound of objects with their suitable decibels.

In which direction will the sun rise on Venus?

A cylindrical capacitor has two co-axial cylinders of length 20cm and radii 1.5cm and 1.6cm. The outer cylinder is earthed and inner cylinder is given a charge of 4 micro coulomb.Then what will be the capacitance of the system (neglect end effects)?

A ray of light is incident on the air-glass interface from air to glass. Which of the given angles cannot be a Brewster's angle (θB)?