13232 + Interview Questions in Physics Page 149 InterviewSolution

7401.	State some of the satellites and their uses.
Answer» State some of the satellites and their uses.

Discussion

7402.	what is spring balance?
Answer» what is spring balance?

Discussion

7403.	What is a food chain?
Answer» What is a food chain?

Discussion

7404.	The distance traveled by a body in nth second is given by the expression (2+3n) . Find the initial velocity and acceleration . Also , find its velocity at the end of 2 seconds .
Answer» The distance traveled by a body in nth second is given by the expression (2+3n) . Find the initial velocity and acceleration . Also , find its velocity at the end of 2 seconds .

Discussion

7405.	Explain briefly why a balloon filled with helium gas rises in air. Why does the balloon rise to a particular height above the ground and does not rise further.
Answer» Explain briefly why a balloon filled with helium gas rises in air. Why does the balloon rise to a particular height above the ground and does not rise further.

Discussion

7406.	The energy that resides in a current carrying inductor is in the form of a ___.
Answer» The energy that resides in a current carrying inductor is in the form of a ___.

Discussion

7407.	The circular boundary of the concave mirror subtends a cone of half angle θ at its centre of curvature. The minimum value of θ for which ray incident on this mirror parallel to the principal axis suffers reflection more than once is
Answer» The circular boundary of the concave mirror subtends a cone of half angle $θ$ at its centre of curvature. The minimum value of $θ$ for which ray incident on this mirror parallel to the principal axis suffers reflection more than once is

Discussion

7408.	A train running at 30 m/s comes to rest at uniform deceleration within 44 s. The distance travelled by train before coming to rest is
Answer» A train running at $30 m / s$ comes to rest at uniform deceleration within $44 s$ . The distance travelled by train before coming to rest is

Discussion

7409.	Which word/number would be at 7th position from the left in step IV?
Answer» Which word/number would be at 7 $^{t h}$ position from the left in step IV?

Discussion

7410.	In a new system, the unit of mass is 10 times, theunit of length is 10 times and unit of time is 100times the Sl unit. Then the value of 1 J in the newsystem of unit is10a, then a is
Answer» In a new system, the unit of mass is 10 times, theunit of length is 10 times and unit of time is 100times the Sl unit. Then the value of 1 J in the newsystem of unit is10a, then a is

Discussion

7411.	Friction exerted by surfaces on each other when they are at rest is called:
Answer» Friction exerted by surfaces on each other when they are at rest is called:

Discussion

7412.	The place of human being in food chain in an ecosystem is as a : (a) producer (b) consumer (c) decomposer (d) both (a) & (b).
Answer» The place of human being in food chain in an ecosystem is as a : (a) producer (b) consumer (c) decomposer (d) both (a) & (b).

7412.

The place of human being in food chain in an ecosystem is as a : (a) producer (b) consumer (c) decomposer (d) both (a) & (b).

Answer»

The place of human being in food chain in an ecosystem is as a :

(a) producer (b) consumer

(c) decomposer (d) both (a) & (b).

Discussion

7413.	more detail about electric discharge between clouds ?
Answer» more detail about electric discharge between clouds ?

Discussion

7414.	In a certain time interval the velocity reduces from 72 km per hour to 36 kilometre per hour of car if the car covers a distance of 150 metre during this time interval find the retardation of the car
Answer» In a certain time interval the velocity reduces from 72 km per hour to 36 kilometre per hour of car if the car covers a distance of 150 metre during this time interval find the retardation of the car

Discussion

7415.	The average speed of a body moving with uniform acceleration travelling a dis†an ce of 3.06 m is 0.34 ms^{-1}. If the change in velocity of the body is 0.18 ms^{-1} during this time then its uniform acceleration is
Answer» The average speed of a body moving with uniform acceleration travelling a dis†an ce of 3.06 m is 0.34 ms^{-1}. If the change in velocity of the body is 0.18 ms^{-1} during this time then its uniform acceleration is

Discussion

7416.	37. A block of mass media is stationary on a rough inclined plane making an angle Θ with the horizontal. Find the contact force between block and the plane
Answer» 37. A block of mass media is stationary on a rough inclined plane making an angle Θ with the horizontal. Find the contact force between block and the plane

Discussion

7417.	When aamotor boat in a sea travels faster than sound then the waves produced on the surface of water are called ?
Answer» When aamotor boat in a sea travels faster than sound then the waves produced on the surface of water are called ?

Discussion

7418.	37. Derive an expression for pressure volume work in a irreversible process.
Answer» 37. Derive an expression for pressure volume work in a irreversible process.

Discussion

7419.	Explain how fish which live deep in the ocean nearer to the sea bed move for their prey,even when it's body is not streamlined
Answer» Explain how fish which live deep in the ocean nearer to the sea bed move for their prey,even when it's body is not streamlined

Discussion

7420.	Distinguish between uniform linear motion and uniform circular motion with examples.
Answer» Distinguish between uniform linear motion and uniform circular motion with examples.

Discussion

7421.	Suppose an isolated north pole is kept at the centreof a circular loop carrying a electric current i. Themagnetic field due to the north pole at a point on theperiphery of the wire is B. The radius of the loopis a. The force on the wire isNearly 2TtaiB perpendicular to the plane othe wire(2) 2taiB in the plane of the wire(3) TtaiB along the axis of the wire(4) ZeroCenaratio
Answer» Suppose an isolated north pole is kept at the centreof a circular loop carrying a electric current i. Themagnetic field due to the north pole at a point on theperiphery of the wire is B. The radius of the loopis a. The force on the wire isNearly 2TtaiB perpendicular to the plane othe wire(2) 2taiB in the plane of the wire(3) TtaiB along the axis of the wire(4) ZeroCenaratio

Discussion

7422.	What do you mean by the audible range of frequency ?
Answer» What do you mean by the audible range of frequency ?

Discussion

7423.	25. Given a cube with point charges q on each of it's vertices. Calculate the force exerted on any charge due to another 7 charges
Answer» 25. Given a cube with point charges q on each of it's vertices. Calculate the force exerted on any charge due to another 7 charges

Discussion

7424.	A particle is thrown vertically upwards from the surface of the earth. Let Tp, be the time taken by the particle to travel from a point P above the earth to its highest point and back to the point P.Similarly, let Tq, be the time taken by the particle to travel from another point Q above the earth to its highest point and back to the same point Q. If the distance between the points P and Q is H, find the expression for acceleration due to gravity in terms of Tp, T and H
Answer» A particle is thrown vertically upwards from the surface of the earth. Let Tp, be the time taken by the particle to travel from a point P above the earth to its highest point and back to the point P.Similarly, let Tq, be the time taken by the particle to travel from another point Q above the earth to its highest point and back to the same point Q. If the distance between the points P and Q is H, find the expression for acceleration due to gravity in terms of Tp, T and H

Discussion

7425.	Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).
Answer» Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).

Discussion

7426.	A ship sends out ultrasound that return from the seabed and is detected after 5 s. If the speed of ultrasound through seawater is 1600 ms−1, what is the distance of the seabed from the ship?
Answer» A ship sends out ultrasound that return from the seabed and is detected after $5 s$ . If the speed of ultrasound through seawater is $1600 m s^{- 1}$ , what is the distance of the seabed from the ship?

Discussion

7427.	a body starting from rest accelerates uniformly at the rate of 10 metre per second square and retards uniformly at the rate of 20 cm per second square find the least time in which it can complete the journey of 5 kilometre the maximum velocity attained by the body is 72 kilometre per hour.
Answer» a body starting from rest accelerates uniformly at the rate of 10 metre per second square and retards uniformly at the rate of 20 cm per second square find the least time in which it can complete the journey of 5 kilometre the maximum velocity attained by the body is 72 kilometre per hour.

Discussion

7428.	From a spherical mirror, the graph of 1/v versus1/u is given by
Answer» From a spherical mirror, the graph of 1/v versus 1/u is given by

Discussion

7429.	Which of the following plays an important role in maintaining objects circular motion constant?
Answer» Which of the following plays an important role in maintaining objects circular motion constant?

Discussion

7430.	To a man running up an inclined plane of inclination 37^° with horizontal at a speed of 5m/s rain appears to be falling at the speed of 6 m/s vertically downwards. Find the velocity of rai
Answer» To a man running up an inclined plane of inclination 37^° with horizontal at a speed of 5m/s rain appears to be falling at the speed of 6 m/s vertically downwards. Find the velocity of rai

Discussion

7431.	If the mass of a body is 10 kg and acceleration due to gravity at a place is 9.8 m s−2, then weight of body is .
Answer» If the mass of a body is $10 k g$ and acceleration due to gravity at a place is $9.8 m s^{- 2}$ , then weight of body is .

Discussion

7432.	Why does it happen?A. A ship dips to a larger depth in fresh water as compared to marine water.B. Fruits can easily be cut with a sharp knife.C. The wall of a dam is broad at its base.D. If a stationary bus suddenly speeds up, passengers are thrown in the backward direction.
Answer» Why does it happen? A. A ship dips to a larger depth in fresh water as compared to marine water. B. Fruits can easily be cut with a sharp knife. C. The wall of a dam is broad at its base. D. If a stationary bus suddenly speeds up, passengers are thrown in the backward direction.

Discussion

7433.	what does the area of an acceleration-displacement graph of a uniformly accelerated body represent
Answer» what does the area of an acceleration-displacement graph of a uniformly accelerated body represent

Discussion

7434.	37.THE coil of a heater is cut into two equal halves and only one of them is used into heater. Then find ratio of heat produced earlier to heat produced now?
Answer» 37.THE coil of a heater is cut into two equal halves and only one of them is used into heater. Then find ratio of heat produced earlier to heat produced now?

Discussion

7435.	Two people are pulling a box in the same direction with 85 N and 65 N force. The net displacement of the box is 18m. Find the total work done.
Answer» Two people are pulling a box in the same direction with 85 N and 65 N force. The net displacement of the box is 18m. Find the total work done.

Discussion

7436.	A telescope has an objective lens of 10 cm diameter and is situated at a distance of 1 km by the telescope, when the mea objects. The minimum distance between these two objects, which can be resolver ope, when the mean wavelength of light is 5000 A, is of the order of from two objects. The minimum (1) 0.5 m (3) 5 mm(2) 5 m (4) 5 cm Why not here limit of resolution formula applied
Answer» A telescope has an objective lens of 10 cm diameter and is situated at a distance of 1 km by the telescope, when the mea objects. The minimum distance between these two objects, which can be resolver ope, when the mean wavelength of light is 5000 A, is of the order of from two objects. The minimum (1) 0.5 m (3) 5 mm (2) 5 m (4) 5 cm Why not here limit of resolution formula applied

Discussion

7437.	If radius of the sphere is (5.3 ± 0.1)cm. Then percentage error in its volume will be
Answer» If radius of the sphere is (5.3 $\pm$ 0.1)cm. Then percentage error in its volume will be

Discussion

7438.	Fill in the blanks:1. The ratio of g(earth)/g(moon) is equal to ……………. .2. The value of acceleration due to gravity ………………. as we move from equator to pole.3. If the earth shrinks to half of its radius its mass remains same. The weight of an object on earth will change …………….. time.
Answer» Fill in the blanks: 1. The ratio of g(earth)/g(moon) is equal to ……………. . 2. The value of acceleration due to gravity ………………. as we move from equator to pole. 3. If the earth shrinks to half of its radius its mass remains same. The weight of an object on earth will change …………….. time.

7438.

Fill in the blanks:1. The ratio of g(earth)/g(moon) is equal to ……………. .2. The value of acceleration due to gravity ………………. as we move from equator to pole.3. If the earth shrinks to half of its radius its mass remains same. The weight of an object on earth will change …………….. time.

Answer»

Fill in the blanks:

1. The ratio of g(earth)/g(moon) is equal to ……………. .

2. The value of acceleration due to gravity ………………. as we move from equator to pole.

3. If the earth shrinks to half of its radius its mass remains same. The weight of an object on earth will change …………….. time.

Discussion

7439.	69.In a capillary tube experiment, a vertical 30 cm long capillary tube is dipped in water. The water rises upto a height of 10 cm due to capillary action. If this experiment is conducted in a freely falling elevator, the length of water column becomes
Answer» 69.In a capillary tube experiment, a vertical 30 cm long capillary tube is dipped in water. The water rises upto a height of 10 cm due to capillary action. If this experiment is conducted in a freely falling elevator, the length of water column becomes

Discussion

7440.	18.A pitcher throws his fastball horizontally at 42.1 metres per second. How far does it drop before crossing the plate, 18.3 metres away
Answer» 18.A pitcher throws his fastball horizontally at 42.1 metres per second. How far does it drop before crossing the plate, 18.3 metres away

Discussion

7441.	A body having 5 kg mass is traveling with a certain velocity and has 10 kgms−1 momentum. What will be its kinetic energy?
Answer» A body having 5 kg mass is traveling with a certain velocity and has $10 k g m s^{- 1}$ momentum. What will be its kinetic energy?

Discussion

7442.	If a bullet was fired from a gun, then choose the best option.
Answer» If a bullet was fired from a gun, then choose the best option.

Discussion

7443.	What the mg and normal forses are pair of action reaction forces give me full explanation how and why ?
Answer» What the mg and normal forses are pair of action reaction forces give me full explanation how and why ?

Discussion

7444.	In a bucket full of water, a block weighing 50 N was immersed. Water weighing 5 N is spilled out of the bucket. Calculate the buoyant force.
Answer» In a bucket full of water, a block weighing $50 N$ was immersed. Water weighing $5 N$ is spilled out of the bucket. Calculate the buoyant force.

Discussion

7445.	what is space time
Answer» what is space time

Discussion

7446.	A 4-bit binary Weighted Resistor type DAC uses 80 kΩ resistor for LSB. The resistor value used for MSB is ____kΩ.10
Answer» A 4-bit binary Weighted Resistor type DAC uses 80 $k Ω$ resistor for LSB. The resistor value used for MSB is ____ $k Ω$ . 10

Discussion

7447.	The de-Broglie wavelength associated with a hydrogen atom moving with a thermal velocity of 3 km/s will be
Answer» The de-Broglie wavelength associated with a hydrogen atom moving with a thermal velocity of 3 km/s will be

Discussion

7448.	Fill in the blanks:i. The perpendicular to the mirror at the point of incidence is called …………. .ii. The reflection of light from a wooden surface is ……….. reflection.
Answer» Fill in the blanks: i. The perpendicular to the mirror at the point of incidence is called …………. . ii. The reflection of light from a wooden surface is ……….. reflection.

7448.

Fill in the blanks:i. The perpendicular to the mirror at the point of incidence is called …………. .ii. The reflection of light from a wooden surface is ……….. reflection.

Answer»

Fill in the blanks:

i. The perpendicular to the mirror at the point of incidence is called …………. .

ii. The reflection of light from a wooden surface is ……….. reflection.

Discussion

7449.	38. At 60^° , dinitrogen tetroxide is 50% dissociated. Calculate the standard free energy change at this temperature and at one atmosphere.
Answer» 38. At 60^° , dinitrogen tetroxide is 50% dissociated. Calculate the standard free energy change at this temperature and at one atmosphere.

Discussion

7450.	An object thrown vertically up from the ground passes the height 5m twice in interval of 10 s what is time of flight
Answer» An object thrown vertically up from the ground passes the height 5m twice in interval of 10 s what is time of flight

Discussion

Explore topic-wise InterviewSolutions in .

State some of the satellites and their uses.

what is spring balance?

What is a food chain?

The distance traveled by a body in nth second is given by the expression (2+3n) . Find the initial velocity and acceleration . Also , find its velocity at the end of 2 seconds .

Explain briefly why a balloon filled with helium gas rises in air. Why does the balloon rise to a particular height above the ground and does not rise further.

The energy that resides in a current carrying inductor is in the form of a ___.

The circular boundary of the concave mirror subtends a cone of half angle θ at its centre of curvature. The minimum value of θ for which ray incident on this mirror parallel to the principal axis suffers reflection more than once is

A train running at 30 m/s comes to rest at uniform deceleration within 44 s. The distance travelled by train before coming to rest is

Which word/number would be at 7th position from the left in step IV?

In a new system, the unit of mass is 10 times, theunit of length is 10 times and unit of time is 100times the Sl unit. Then the value of 1 J in the newsystem of unit is10a, then a is

Friction exerted by surfaces on each other when they are at rest is called:

The place of human being in food chain in an ecosystem is as a : (a) producer (b) consumer (c) decomposer (d) both (a) &amp; (b).

more detail about electric discharge between clouds ?

In a certain time interval the velocity reduces from 72 km per hour to 36 kilometre per hour of car if the car covers a distance of 150 metre during this time interval find the retardation of the car

The average speed of a body moving with uniform acceleration travelling a dis†an ce of 3.06 m is 0.34 ms^{-1}. If the change in velocity of the body is 0.18 ms^{-1} during this time then its uniform acceleration is

37. A block of mass media is stationary on a rough inclined plane making an angle Θ with the horizontal. Find the contact force between block and the plane

When aamotor boat in a sea travels faster than sound then the waves produced on the surface of water are called ?

37. Derive an expression for pressure volume work in a irreversible process.

Explain how fish which live deep in the ocean nearer to the sea bed move for their prey,even when it's body is not streamlined

Distinguish between uniform linear motion and uniform circular motion with examples.

What do you mean by the audible range of frequency ?

25. Given a cube with point charges q on each of it's vertices. Calculate the force exerted on any charge due to another 7 charges

Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).

A ship sends out ultrasound that return from the seabed and is detected after 5 s. If the speed of ultrasound through seawater is 1600 ms−1, what is the distance of the seabed from the ship?

a body starting from rest accelerates uniformly at the rate of 10 metre per second square and retards uniformly at the rate of 20 cm per second square find the least time in which it can complete the journey of 5 kilometre the maximum velocity attained by the body is 72 kilometre per hour.

From a spherical mirror, the graph of 1/v versus1/u is given by

Which of the following plays an important role in maintaining objects circular motion constant?

To a man running up an inclined plane of inclination 37^° with horizontal at a speed of 5m/s rain appears to be falling at the speed of 6 m/s vertically downwards. Find the velocity of rai

If the mass of a body is 10 kg and acceleration due to gravity at a place is 9.8 m s−2, then weight of body is .

Why does it happen?A. A ship dips to a larger depth in fresh water as compared to marine water.B. Fruits can easily be cut with a sharp knife.C. The wall of a dam is broad at its base.D. If a stationary bus suddenly speeds up, passengers are thrown in the backward direction.

what does the area of an acceleration-displacement graph of a uniformly accelerated body represent

37.THE coil of a heater is cut into two equal halves and only one of them is used into heater. Then find ratio of heat produced earlier to heat produced now?

Two people are pulling a box in the same direction with 85 N and 65 N force. The net displacement of the box is 18m. Find the total work done.

If radius of the sphere is (5.3 ± 0.1)cm. Then percentage error in its volume will be

69.In a capillary tube experiment, a vertical 30 cm long capillary tube is dipped in water. The water rises upto a height of 10 cm due to capillary action. If this experiment is conducted in a freely falling elevator, the length of water column becomes

18.A pitcher throws his fastball horizontally at 42.1 metres per second. How far does it drop before crossing the plate, 18.3 metres away

A body having 5 kg mass is traveling with a certain velocity and has 10 kgms−1 momentum. What will be its kinetic energy?

If a bullet was fired from a gun, then choose the best option.

What the mg and normal forses are pair of action reaction forces give me full explanation how and why ?

In a bucket full of water, a block weighing 50 N was immersed. Water weighing 5 N is spilled out of the bucket. Calculate the buoyant force.

what is space time

A 4-bit binary Weighted Resistor type DAC uses 80 kΩ resistor for LSB. The resistor value used for MSB is ____kΩ.10

The de-Broglie wavelength associated with a hydrogen atom moving with a thermal velocity of 3 km/s will be

Fill in the blanks:i. The perpendicular to the mirror at the point of incidence is called …………. .ii. The reflection of light from a wooden surface is ……….. reflection.

38. At 60^° , dinitrogen tetroxide is 50% dissociated. Calculate the standard free energy change at this temperature and at one atmosphere.

An object thrown vertically up from the ground passes the height 5m twice in interval of 10 s what is time of flight

The place of human being in food chain in an ecosystem is as a : (a) producer (b) consumer (c) decomposer (d) both (a) & (b).