3752 + Interview Questions in Physics Page 39 InterviewSolution

1901.	Core of electromagnets are made of ferromagnetic material which has
Answer» Core of electromagnets are made of ferromagnetic material which has

Discussion

1902.	Which person uses the objects shown in the following pictures?
Answer» Which person uses the objects shown in the following pictures?

Discussion

1903.	To see an object, which of the following things we do we not need?
Answer» To see an object, which of the following things we do we not need?

Discussion

1904.	The small letters which are seen through a water column in a test tube looks bigger why ? Give reasons
Answer» The small letters which are seen through a water column in a test tube looks bigger why ? Give reasons

Discussion

1905.	In olden days, sailors used to find direction by suspending a piece of a/an___ .
Answer» In olden days, sailors used to find direction by suspending a piece of a/an___ .

Discussion

1906.	An electron moving towards the east enters magnetic field directed toward the north. The direction of magnetic force on electron will be ?
Answer» An electron moving towards the east enters magnetic field directed toward the north. The direction of magnetic force on electron will be ?

Discussion

1907.	Can water cause molecules in a piece of chalk to break apart? How can you say this?
Answer» Can water cause molecules in a piece of chalk to break apart? How can you say this?

Discussion

1908.	A car is moving at an average speed of 6025 km/hr. How much distance will it cover in 614 hours?
Answer» A car is moving at an average speed of $60 \frac{2}{5}$ km/hr. How much distance will it cover in $6 \frac{1}{4}$ hours?

Discussion

1909.	The figure gives experimentally measured B vs H variation in a ferromagnetic material. The retentivity, co-ercivity and saturation magnetization, respectively, of the material are:
Answer» The figure gives experimentally measured $B vs H$ variation in a ferromagnetic material. The retentivity, co-ercivity and saturation magnetization, respectively, of the material are:

Discussion

1910.	6) If the diameter of fly wheel is increases by 16, thenincrease in its M.I about an axis passing through centerand perpendicular to the plane will be
Answer» 6) If the diameter of fly wheel is increases by 16, then increase in its M.I about an axis passing through center and perpendicular to the plane will be

Discussion

1911.	38.Two closed containers of equal volume filled with air at pressure Po and temperature To.Both are connected by a narrow tube. If one of the container is maintained at temperature T, then new pressure in the containers will be
Answer» 38.Two closed containers of equal volume filled with air at pressure Po and temperature To.Both are connected by a narrow tube. If one of the container is maintained at temperature T, then new pressure in the containers will be

Discussion

1912.	63.The time period of a "SIMPLE HARMONIC OSCILLATOR" is T. Starting from the mean point, how much time will it take to complete 3/8 of 1 oscillation? A) 3/8 T B) 5/8 T C) 5/12 T D) 8/3 T
Answer» 63.The time period of a "SIMPLE HARMONIC OSCILLATOR" is T. Starting from the mean point, how much time will it take to complete 3/8 of 1 oscillation? A) 3/8 T B) 5/8 T C) 5/12 T D) 8/3 T

Discussion

1913.	A ………… is an artificial source of light.
Answer» A ………… is an artificial source of light.

Discussion

1914.	what is the formula for vector addition for force
Answer» what is the formula for vector addition for force

Discussion

1915.	Which of the following position-time graphs represents a constant velocity motion ?
Answer» Which of the following position-time graphs represents a constant velocity motion ?

Discussion

1916.	In a region of space the electric field is given byE 8i+4j+3k. The electric flux through surface ofarea of 20 units in x-y plane is(2) 80 units(4) 100 units160 units(3) 60 units
Answer» In a region of space the electric field is given byE 8i+4j+3k. The electric flux through surface ofarea of 20 units in x-y plane is(2) 80 units(4) 100 units160 units(3) 60 units

Discussion

1917.	The string of a guitar and the surface of a drum have _______ motion.
Answer» The string of a guitar and the surface of a drum have _______ motion.

Discussion

1918.	If the efficiency of a machine is 60 % and it does 90 J of work, what is the input work?
Answer» If the efficiency of a machine is $60 %$ and it does $90 J$ of work, what is the input work?

Discussion

1919.	A meteor burns when it enters the earth atmosphere. This is due to the fact that:
Answer» A meteor burns when it enters the earth atmosphere. This is due to the fact that:

Discussion

1920.	दारोगा वंशीधर गैरकानूनी कार्यों की वजह से पंडित अलोपीदीन को गिरफ्तार करता है, लेकिन कहानी के अंत में इसी पंडित अलोपीदीन की सहायता से मुग्ध होकर उसके यहाँ मैनेजर की नौकरी को तैयार हो जाता है। आपके विचार से क्या वंशीधर का ऐसा करना उचित था? आप उसकी जगह होते तो क्या करते?
Answer» दारोगा वंशीधर गैरकानूनी कार्यों की वजह से पंडित अलोपीदीन को गिरफ्तार करता है, लेकिन कहानी के अंत में इसी पंडित अलोपीदीन की सहायता से मुग्ध होकर उसके यहाँ मैनेजर की नौकरी को तैयार हो जाता है। आपके विचार से क्या वंशीधर का ऐसा करना उचित था? आप उसकी जगह होते तो क्या करते?

Discussion

1921.	A magnet of length 14cm and magnetic moment p is broken into 2 parts of length 6cm and 8cm.they are put at right angle to each other with the opposite poles together.magnetic moment of combination is
Answer» A magnet of length 14cm and magnetic moment p is broken into 2 parts of length 6cm and 8cm.they are put at right angle to each other with the opposite poles together.magnetic moment of combination is

Discussion

1922.	Difference between mechanical advantage and efficiency.
Answer» Difference between mechanical advantage and efficiency.

Discussion

1923.	Obtain Bernoulli's equation for steady, incompressible,irrotional and viscous liquid.
Answer» Obtain Bernoulli's equation for steady, incompressible,irrotional and viscous liquid.

Discussion

1924.	A passenger train of length 60 m travels at a speed of 80 km/hAnother freight train of length 120 m travels at a speed of30 km/h. The ratio of times taken by the passenger train tocompletely cross the freight train when: (i) they are movingsame direction, and (ii) in the opposite directions is:
Answer» A passenger train of length 60 m travels at a speed of 80 km/hAnother freight train of length 120 m travels at a speed of30 km/h. The ratio of times taken by the passenger train tocompletely cross the freight train when: (i) they are movingsame direction, and (ii) in the opposite directions is:

Discussion

1925.	what is the principle used in bullet train .
Answer» what is the principle used in bullet train .

Discussion

1926.	When 92U^235 undergoes fission by absorbing ○n^1 and 56Ba^144 and 36Kr^89 are formed. The number of neutrons produced wil be
Answer» When 92U^235 undergoes fission by absorbing ○n^1 and 56Ba^144 and 36Kr^89 are formed. The number of neutrons produced wil be

Discussion

1927.	show that the motion of simple pendulum is simple harmonic and hence derive an equation for its time period .what is its seconds pendulum
Answer» show that the motion of simple pendulum is simple harmonic and hence derive an equation for its time period .what is its seconds pendulum

Discussion

1928.	15.A dynometer d is attached to two blocks of measure 6kg and 4kg as shown in the figure .The reading of the dynometer is
Answer» 15.A dynometer d is attached to two blocks of measure 6kg and 4kg as shown in the figure .The reading of the dynometer is

Discussion

1929.	Identify the units for measuring area.
Answer» Identify the units for measuring area.

Discussion

1930.	The area of each small square is 1 sq. unit. Which of the given shapes have equal area?
Answer» The area of each small square is 1 sq. unit. Which of the given shapes have equal area?

Discussion

1931.	what is the order af mass of human
Answer» what is the order af mass of human

Discussion

1932.	Is there any direction of static friction?
Answer» Is there any direction of static friction?

Discussion

1933.	A boy lifts a load through a vertical height of 5 m by a fixed pulley by applying an effort at the other end. Find the velocity ratio.
Answer» A boy lifts a load through a vertical height of 5 m by a fixed pulley by applying an effort at the other end. Find the velocity ratio.

Discussion

1934.	An ideal pulley system can lift a load of 1500 N by an effort of 300 N. The velocity ratio of the system is .
Answer» An ideal pulley system can lift a load of 1500 N by an effort of 300 N. The velocity ratio of the system is .

Discussion

1935.	Wave is produced when there is a disturbance in the medium but light as a non mechanical wave can travel in vacuum . HOW?
Answer» Wave is produced when there is a disturbance in the medium but light as a non mechanical wave can travel in vacuum . HOW?

Discussion

1936.	17. A satellite is moving around a planet in an elliptical orbit. The nearest distance of the satellite from planet is R and maximum distance is 2R. Velocity of satellite at maximum distance is V. For what velocity of the satellite it will move around the planet in a circular path of radius 2R
Answer» 17. A satellite is moving around a planet in an elliptical orbit. The nearest distance of the satellite from planet is R and maximum distance is 2R. Velocity of satellite at maximum distance is V. For what velocity of the satellite it will move around the planet in a circular path of radius 2R

Discussion

1937.	What are the possible sources of errors in measurement?
Answer» What are the possible sources of errors in measurement?

Discussion

1938.	if resul†an t force act perpendicular to the velicity then kinetic energy does not changrs explain wh
Answer» if resul†an t force act perpendicular to the velicity then kinetic energy does not changrs explain wh

Discussion

1939.	ntA straight horizontal wire placed on a table and carries a current from east to west,then the direction of magnetic force on the wire is?n
Answer» ntA straight horizontal wire placed on a table and carries a current from east to west,then the direction of magnetic force on the wire is?n

Discussion

1940.	How can balanced force change shape?
Answer» How can balanced force change shape?

Discussion

1941.	Is friction constant for all objects? If not why?
Answer» Is friction constant for all objects? If not why?

Discussion

1942.	Find the volume of a cuboidal container having dimensions 3m×5m×9m
Answer» Find the volume of a cuboidal container having dimensions $3 m \times 5 m \times 9 m$

Discussion

1943.	Provided a metal piece and a thread, what else is necessarily required to find out if the metal piece is a magnet or not?
Answer» Provided a metal piece and a thread, what else is necessarily required to find out if the metal piece is a magnet or not?

Discussion

1944.	Why does a magnet always attract iron, not wood?
Answer» Why does a magnet always attract iron, not wood?

Discussion

1945.	Voice box is also known as _________.
Answer» Voice box is also known as _________.

Discussion

1946.	The average speed of an object over a given time duration is 6m/s. If it travels first half of the duration with a constant speed of 4 m/s, its speed during the next half duration is
Answer» The average speed of an object over a given time duration is 6m/s. If it travels first half of the duration with a constant speed of 4 m/s, its speed during the next half duration is

Discussion

1947.	What are magnetic and non-magnetic materials? Explain and categorise the given substances into two groups-magnetic and non-magnetic.Iron key, Glass, Wood, Nail, Book, Rubber, Fork, Sand, Iron particles, Chalk, Alpin
Answer» What are magnetic and non-magnetic materials? Explain and categorise the given substances into two groups-magnetic and non-magnetic. Iron key, Glass, Wood, Nail, Book, Rubber, Fork, Sand, Iron particles, Chalk, Alpin

Discussion

1948.	What is vescocity
Answer» What is vescocity

Discussion

1949.	Which of the following object/s can form a shadow?
Answer» Which of the following object/s can form a shadow?

Discussion

1950.	While measuring the length of a pencil, the reading of the scale at one end is 3.0cm and at the other end is 50.1cm. What is the length of the pencil?
Answer» While measuring the length of a pencil, the reading of the scale at one end is $3.0 c m$ and at the other end is $50.1 c m$ . What is the length of the pencil?

1950.

While measuring the length of a pencil, the reading of the scale at one end is 3.0cm and at the other end is 50.1cm. What is the length of the pencil?

Answer»

While measuring the length of a pencil, the reading of the scale at one end is $3.0 c m$ and at the other end is $50.1 c m$ . What is the length of the pencil?

Discussion

Explore topic-wise InterviewSolutions in .

Core of electromagnets are made of ferromagnetic material which has

Which person uses the objects shown in the following pictures?

To see an object, which of the following things we do we not need?

The small letters which are seen through a water column in a test tube looks bigger why ? Give reasons

In olden days, sailors used to find direction by suspending a piece of a/an___ .

An electron moving towards the east enters magnetic field directed toward the north. The direction of magnetic force on electron will be ?

Can water cause molecules in a piece of chalk to break apart? How can you say this?

A car is moving at an average speed of 6025 km/hr. How much distance will it cover in 614 hours?

The figure gives experimentally measured B vs H variation in a ferromagnetic material. The retentivity, co-ercivity and saturation magnetization, respectively, of the material are:

6) If the diameter of fly wheel is increases by 16, thenincrease in its M.I about an axis passing through centerand perpendicular to the plane will be

38.Two closed containers of equal volume filled with air at pressure Po and temperature To.Both are connected by a narrow tube. If one of the container is maintained at temperature T, then new pressure in the containers will be

63.The time period of a "SIMPLE HARMONIC OSCILLATOR" is T. Starting from the mean point, how much time will it take to complete 3/8 of 1 oscillation? A) 3/8 T B) 5/8 T C) 5/12 T D) 8/3 T

A ………… is an artificial source of light.

what is the formula for vector addition for force

Which of the following position-time graphs represents a constant velocity motion ?

In a region of space the electric field is given byE 8i+4j+3k. The electric flux through surface ofarea of 20 units in x-y plane is(2) 80 units(4) 100 units160 units(3) 60 units

The string of a guitar and the surface of a drum have _______ motion.

If the efficiency of a machine is 60 % and it does 90 J of work, what is the input work?

A meteor burns when it enters the earth atmosphere. This is due to the fact that:

A magnet of length 14cm and magnetic moment p is broken into 2 parts of length 6cm and 8cm.they are put at right angle to each other with the opposite poles together.magnetic moment of combination is

Difference between mechanical advantage and efficiency.

Obtain Bernoulli's equation for steady, incompressible,irrotional and viscous liquid.

A passenger train of length 60 m travels at a speed of 80 km/hAnother freight train of length 120 m travels at a speed of30 km/h. The ratio of times taken by the passenger train tocompletely cross the freight train when: (i) they are movingsame direction, and (ii) in the opposite directions is:

what is the principle used in bullet train .

When 92U^235 undergoes fission by absorbing ○n^1 and 56Ba^144 and 36Kr^89 are formed. The number of neutrons produced wil be

show that the motion of simple pendulum is simple harmonic and hence derive an equation for its time period .what is its seconds pendulum

15.A dynometer d is attached to two blocks of measure 6kg and 4kg as shown in the figure .The reading of the dynometer is

Identify the units for measuring area.

The area of each small square is 1 sq. unit. Which of the given shapes have equal area?

what is the order af mass of human

Is there any direction of static friction?

A boy lifts a load through a vertical height of 5 m by a fixed pulley by applying an effort at the other end. Find the velocity ratio.

An ideal pulley system can lift a load of 1500 N by an effort of 300 N. The velocity ratio of the system is .

Wave is produced when there is a disturbance in the medium but light as a non mechanical wave can travel in vacuum . HOW?

17. A satellite is moving around a planet in an elliptical orbit. The nearest distance of the satellite from planet is R and maximum distance is 2R. Velocity of satellite at maximum distance is V. For what velocity of the satellite it will move around the planet in a circular path of radius 2R

What are the possible sources of errors in measurement?

if resul†an t force act perpendicular to the velicity then kinetic energy does not changrs explain wh

ntA straight horizontal wire placed on a table and carries a current from east to west,then the direction of magnetic force on the wire is?n

How can balanced force change shape?

Is friction constant for all objects? If not why?

Find the volume of a cuboidal container having dimensions 3m×5m×9m

Provided a metal piece and a thread, what else is necessarily required to find out if the metal piece is a magnet or not?

Why does a magnet always attract iron, not wood?

Voice box is also known as _________.

The average speed of an object over a given time duration is 6m/s. If it travels first half of the duration with a constant speed of 4 m/s, its speed during the next half duration is

What are magnetic and non-magnetic materials? Explain and categorise the given substances into two groups-magnetic and non-magnetic.Iron key, Glass, Wood, Nail, Book, Rubber, Fork, Sand, Iron particles, Chalk, Alpin

What is vescocity

Which of the following object/s can form a shadow?

While measuring the length of a pencil, the reading of the scale at one end is 3.0cm and at the other end is 50.1cm. What is the length of the pencil?