6277 + Interview Questions in Physics Page 62 InterviewSolution

3051.	63.The work done by the external force to slowly pull the block up the topmost point of hemisphere keeping the contact maintained is (m = 0.1 kg, R = 2 m, ) a. 3 J b. 1 J c. 4 J d. 2 J
Answer» 63.The work done by the external force to slowly pull the block up the topmost point of hemisphere keeping the contact maintained is (m = 0.1 kg, R = 2 m, ) a. 3 J b. 1 J c. 4 J d. 2 J

Discussion

3052.	A block of mass 0.1kg is connected to an elastic spring of spring cons†an t 640N/m and oscillates in a damping medium of damping cons†an t 10^{-2 ^{}}kg/s. The system dissipates its energy gradually. The time taken for its mechanical energy ofvibration to drop to half of its initial value is?
Answer» A block of mass 0.1kg is connected to an elastic spring of spring cons†an t 640N/m and oscillates in a damping medium of damping cons†an t 10^{-2 ^{}}kg/s. The system dissipates its energy gradually. The time taken for its mechanical energy ofvibration to drop to half of its initial value is?

Discussion

3053.	The surface area of the base of a brick X kept on a surface is 100 cm2 and that of the brick Y is 250 cm2. If each brick weighs 100 N, which of the following is correct if P1 and P2 are the pressures exerted by bricks X and Y respectively?
Answer» The surface area of the base of a brick X kept on a surface is 100 $c m^{2}$ and that of the brick Y is 250 $c m^{2} .$ If each brick weighs 100 N, which of the following is correct if $P_{1}$ and $P_{2}$ are the pressures exerted by bricks X and Y respectively?

Discussion

3054.	Heat and temperature are two very different things but they are very closely related to each other. Discuss how.
Answer» Heat and temperature are two very different things but they are very closely related to each other. Discuss how.

Discussion

3055.	21.A thin semicircular conducting ring of radius r with its plane vertical and perpendicular to magnetic meridian is falling in earth's magnetic field. At an instantaneous position, the speed of the ring is v. The potential difference developed across the ring is? And which side is at higher at higher potential?(Assume Bh and Bv to be the horizontal and vertical components of the earth's magnetic field)
Answer» 21.A thin semicircular conducting ring of radius r with its plane vertical and perpendicular to magnetic meridian is falling in earth's magnetic field. At an instantaneous position, the speed of the ring is v. The potential difference developed across the ring is? And which side is at higher at higher potential?(Assume Bh and Bv to be the horizontal and vertical components of the earth's magnetic field)

Discussion

3056.	Define relative density. A cylindrical block of wood of height 4.2m and mass 100Kg floats vertically in water. The relative density of wood is 0.8. What height of the block will be seen above the water? [3 MARKS]
Answer» Define relative density. A cylindrical block of wood of height 4.2m and mass 100Kg floats vertically in water. The relative density of wood is 0.8. What height of the block will be seen above the water? [3 MARKS]

Discussion

3057.	if 20 J work has to be to done to move an electric charge of 4 C from a point where potential is 10 volt to another point where potential is V volt, find value of V
Answer» if 20 J work has to be to done to move an electric charge of 4 C from a point where potential is 10 volt to another point where potential is V volt, find value of V

Discussion

3058.	Explain what role do the terminals of an electric cell play in the flow of current in an electric circuit.
Answer» Explain what role do the terminals of an electric cell play in the flow of current in an electric circuit.

Discussion

3059.	34.In a circuit three incandescent bulbs A B C of rating 40w 200v ,50w 200v,100w 200v are connected in series with 200 v supply what is power dissipated in 50w bulb
Answer» 34.In a circuit three incandescent bulbs A B C of rating 40w 200v ,50w 200v,100w 200v are connected in series with 200 v supply what is power dissipated in 50w bulb

Discussion

3060.	Sometimes we tend to see a very faint image of ourselves in a transparent glass sheet. Which property of glass sheet can be highlighted by this observation?
Answer» Sometimes we tend to see a very faint image of ourselves in a transparent glass sheet. Which property of glass sheet can be highlighted by this observation?

Discussion

3061.	An opaque object is moved away from a point source of light, then what happens to the umbra?
Answer» An opaque object is moved away from a point source of light, then what happens to the umbra?

Discussion

3062.	Why are convection currents seen in liquids and gases, and not in solids?
Answer» Why are convection currents seen in liquids and gases, and not in solids?

Discussion

3063.	Two or more cells joined together form a ___.
Answer» Two or more cells joined together form a ___.

Discussion

3064.	Satish magnetised a piece of iron marked W, X, Y and Z using the rubbing method as shown in the figure.Which of these parts of the iron piece will become the north pole?
Answer» Satish magnetised a piece of iron marked W, X, Y and Z using the rubbing method as shown in the figure. Which of these parts of the iron piece will become the north pole?

3064.

Satish magnetised a piece of iron marked W, X, Y and Z using the rubbing method as shown in the figure.Which of these parts of the iron piece will become the north pole?

Answer»

Satish magnetised a piece of iron marked W, X, Y and Z using the rubbing method as shown in the figure.

Which of these parts of the iron piece will become the north pole?

Discussion

3065.	The motion of the wheel of a moving car is:
Answer» The motion of the wheel of a moving car is:

Discussion

3066.	Explain - Nearly everything in the Universe is constantly accelerating or decelerating.
Answer» Explain - Nearly everything in the Universe is constantly accelerating or decelerating.

Discussion

3067.	Size of the shadow ___ the size of the object.
Answer» Size of the shadow ___ the size of the object.

Discussion

3068.	A body cools in 3 minutes from 90^° C-80^° C . The temperature reduces to 70^° C in next (if the temperature of surrounding is 20^° C) a-2.54 minutes b-2minutes c-6minutes d-3.54 minutes
Answer» A body cools in 3 minutes from 90^° C-80^° C . The temperature reduces to 70^° C in next (if the temperature of surrounding is 20^° C) a-2.54 minutes b-2minutes c-6minutes d-3.54 minutes

Discussion

3069.	Question 02 Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection?
Answer» Question 02 Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection?

Discussion

3070.	A particle is moving along a circular path of radius 2 metre with uniform speed of 5 m/s. What will be the change in velocity when the particle completes half of the revolution and quarter half of the revolution
Answer» A particle is moving along a circular path of radius 2 metre with uniform speed of 5 m/s. What will be the change in velocity when the particle completes half of the revolution and quarter half of the revolution

Discussion

3071.	Which of the following appliance does not use heating effect of current?
Answer» Which of the following appliance does not use heating effect of current?

Discussion

3072.	From which of the following are coal and petroleum obtained?
Answer» From which of the following are coal and petroleum obtained?

Discussion

3073.	A bulb is connected in series with an inductor to an AC supply. How will the brightness of bulb chamge on inserting a diamagnetic core in the inductor?
Answer» A bulb is connected in series with an inductor to an AC supply. How will the brightness of bulb chamge on inserting a diamagnetic core in the inductor?

Discussion

3074.	Statement 1: Heat transfer by conduction and convection requires material medium.Statement 2: Heat transfer by radiation doesn't require a material medium
Answer» Statement 1: Heat transfer by conduction and convection requires material medium. Statement 2: Heat transfer by radiation doesn't require a material medium

Discussion

3075.	Why plane mirror forms an erect image?
Answer» Why plane mirror forms an erect image?

Discussion

3076.	22. Time taken by a simple pendulum to complete one oscillation is T1 on surface of earth and T2 on the surface of planet having radius twice of earth and mass half of earth. Then the relation between T1 and T2 is
Answer» 22. Time taken by a simple pendulum to complete one oscillation is T1 on surface of earth and T2 on the surface of planet having radius twice of earth and mass half of earth. Then the relation between T1 and T2 is

Discussion

3077.	In the circuit shown below, which of the following wires, when connected between points A and B, will lead to the maximum brightness of the bulb?
Answer» In the circuit shown below, which of the following wires, when connected between points A and B, will lead to the maximum brightness of the bulb?

Discussion

3078.	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

3079.	The S.I. unit of weight is _______.
Answer» The S.I. unit of weight is _______.

Discussion

3080.	Question 4 North pole of a magnet can be identified by (a) Another magnet having its poles marked as North pole and South pole. (b) Another magnet no matter whether the poles are marked or not. (c) Using an iron bar. (d) Using iron filings.
Answer» Question 4 North pole of a magnet can be identified by (a) Another magnet having its poles marked as North pole and South pole. (b) Another magnet no matter whether the poles are marked or not. (c) Using an iron bar. (d) Using iron filings.

3080.

Question 4 North pole of a magnet can be identified by (a) Another magnet having its poles marked as North pole and South pole. (b) Another magnet no matter whether the poles are marked or not. (c) Using an iron bar. (d) Using iron filings.

Answer»

Question 4

North pole of a magnet can be identified by

(a) Another magnet having its poles marked as North pole and South pole.

(b) Another magnet no matter whether the poles are marked or not.

(c) Using an iron bar.

(d) Using iron filings.

Discussion

3081.	An object travels around a circle of radius 6 m with a speed of 3π ms−1. The distance and displacement after 3 seconds is _____ and _____, respectively.
Answer» An object travels around a circle of radius 6 m with a speed of $3 π$ $m s^{- 1} .$ The distance and displacement after 3 seconds is _____ and _____, respectively.

Discussion

3082.	A sample of KClO_3 on decomposition yielded 448ml of oxygen gas at STP then the weight of KClO_{} originally taken was
Answer» A sample of KClO_3 on decomposition yielded 448ml of oxygen gas at STP then the weight of KClO_{} originally taken was

Discussion

3083.	What is the magnitude of net force in the given situation?
Answer» What is the magnitude of net force in the given situation?

Discussion

3084.	50 At what speed the velocity head of water is equal to pressure head of 40cm of mercury ??
Answer» 50 At what speed the velocity head of water is equal to pressure head of 40cm of mercury ??

Discussion

3085.	Which is the fastest method of heat transfer–conduction, convection or radiation?
Answer» Which is the fastest method of heat transfer–conduction, convection or radiation?

Discussion

3086.	What is drought?
Answer» What is drought?

Discussion

3087.	Fig. 13.15 shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster?Fig. 13.15 Distance-time graph for the motion of two cars
Answer» Fig. 13.15 shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster? Fig. 13.15 Distance-time graph for the motion of two cars

3087.

Fig. 13.15 shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster?Fig. 13.15 Distance-time graph for the motion of two cars

Answer» Fig. 13.15 shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster?

Fig. 13.15 Distance-time graph for the motion of two cars

Discussion

3088.	Harish runs faster than Suresh to cover the same distance. Which fundamental physical quantity is used for comparing their speeds?
Answer» Harish runs faster than Suresh to cover the same distance. Which fundamental physical quantity is used for comparing their speeds?

Discussion

3089.	What is Relation between angle of dip and magnetic latitude at that point ?
Answer» What is Relation between angle of dip and magnetic latitude at that point ?

Discussion

3090.	Why cyclones are prone to Indian coastline
Answer» Why cyclones are prone to Indian coastline

Discussion

3091.	The lengths of the sides of a triangle are in the ratio 3 : 4 : 5 and its perimeter is 144 cm. Find the height corresponding to the longest side.
Answer» The lengths of the sides of a triangle are in the ratio 3 : 4 : 5 and its perimeter is 144 cm. Find the height corresponding to the longest side.

Discussion

3092.	What is the colour of an electron?
Answer» What is the colour of an electron?

Discussion

3093.	An infinitely large thin plane sheet has a uniform surface charge density +σ. Obtain the expression for the amount of work done in bringing a point charge q from infinity to a point, dis†an ce r, in front of the charged plane sheet.
Answer» An infinitely large thin plane sheet has a uniform surface charge density +σ. Obtain the expression for the amount of work done in bringing a point charge q from infinity to a point, dis†an ce r, in front of the charged plane sheet.

Discussion

3094.	the image of an object A before a plane mirror LM is seen at the point B by an observer at D as shown in the figure. prove that the image is as far behind the mirror as the object is in front of the mirror
Answer» the image of an object A before a plane mirror LM is seen at the point B by an observer at D as shown in the figure. prove that the image is as far behind the mirror as the object is in front of the mirror

Discussion

3095.	For the reaction 2HI(g) H2(g) +I2(g), the degree of dissociation (a) of HI(g) is related to equilibrium constant kp by the relation?
Answer» For the reaction 2HI(g) H2(g) +I2(g), the degree of dissociation (a) of HI(g) is related to equilibrium constant kp by the relation?

Discussion

3096.	A body travels 200 cm in the first two seconds and 220 cm in the next four seconds. The average speed of the body for the entire journey is .
Answer» A body travels 200 cm in the first two seconds and 220 cm in the next four seconds. The average speed of the body for the entire journey is .

Discussion

3097.	nt300 gm of water at 25c is added to 100 gm of ice at 0C. THE FINAL TEMP OF MIXTURE ISn
Answer» nt300 gm of water at 25c is added to 100 gm of ice at 0C. THE FINAL TEMP OF MIXTURE ISn

Discussion

3098.	What is a natural magnet known as?
Answer» What is a natural magnet known as?

Discussion

3099.	List the qualities that a good mirror must have.
Answer» List the qualities that a good mirror must have.

Discussion

3100.	Question 2Signs of the abscissa and ordinate of a point in the second quadrant are respectively;A) +,+B) -,-C) -,+D) +,-
Answer» Question 2 Signs of the abscissa and ordinate of a point in the second quadrant are respectively; A) +,+ B) -,- C) -,+ D) +,-

Discussion

Explore topic-wise InterviewSolutions in .

63.The work done by the external force to slowly pull the block up the topmost point of hemisphere keeping the contact maintained is (m = 0.1 kg, R = 2 m, ) a. 3 J b. 1 J c. 4 J d. 2 J

A block of mass 0.1kg is connected to an elastic spring of spring cons†an t 640N/m and oscillates in a damping medium of damping cons†an t 10^{-2 ^{}}kg/s. The system dissipates its energy gradually. The time taken for its mechanical energy ofvibration to drop to half of its initial value is?

The surface area of the base of a brick X kept on a surface is 100 cm2 and that of the brick Y is 250 cm2. If each brick weighs 100 N, which of the following is correct if P1 and P2 are the pressures exerted by bricks X and Y respectively?

Heat and temperature are two very different things but they are very closely related to each other. Discuss how.

Define relative density. A cylindrical block of wood of height 4.2m and mass 100Kg floats vertically in water. The relative density of wood is 0.8. What height of the block will be seen above the water? [3 MARKS]

if 20 J work has to be to done to move an electric charge of 4 C from a point where potential is 10 volt to another point where potential is V volt, find value of V

Explain what role do the terminals of an electric cell play in the flow of current in an electric circuit.

34.In a circuit three incandescent bulbs A B C of rating 40w 200v ,50w 200v,100w 200v are connected in series with 200 v supply what is power dissipated in 50w bulb

Sometimes we tend to see a very faint image of ourselves in a transparent glass sheet. Which property of glass sheet can be highlighted by this observation?

An opaque object is moved away from a point source of light, then what happens to the umbra?

Why are convection currents seen in liquids and gases, and not in solids?

Two or more cells joined together form a ___.

Satish magnetised a piece of iron marked W, X, Y and Z using the rubbing method as shown in the figure.Which of these parts of the iron piece will become the north pole?

The motion of the wheel of a moving car is:

Explain - Nearly everything in the Universe is constantly accelerating or decelerating.

Size of the shadow ___ the size of the object.

A body cools in 3 minutes from 90^° C-80^° C . The temperature reduces to 70^° C in next (if the temperature of surrounding is 20^° C) a-2.54 minutes b-2minutes c-6minutes d-3.54 minutes

Question 02 Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection?

A particle is moving along a circular path of radius 2 metre with uniform speed of 5 m/s. What will be the change in velocity when the particle completes half of the revolution and quarter half of the revolution

Which of the following appliance does not use heating effect of current?

From which of the following are coal and petroleum obtained?

A bulb is connected in series with an inductor to an AC supply. How will the brightness of bulb chamge on inserting a diamagnetic core in the inductor?

Statement 1: Heat transfer by conduction and convection requires material medium.Statement 2: Heat transfer by radiation doesn't require a material medium

Why plane mirror forms an erect image?

22. Time taken by a simple pendulum to complete one oscillation is T1 on surface of earth and T2 on the surface of planet having radius twice of earth and mass half of earth. Then the relation between T1 and T2 is

In the circuit shown below, which of the following wires, when connected between points A and B, will lead to the maximum brightness of the bulb?

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?

The S.I. unit of weight is _______.

Question 4 North pole of a magnet can be identified by (a) Another magnet having its poles marked as North pole and South pole. (b) Another magnet no matter whether the poles are marked or not. (c) Using an iron bar. (d) Using iron filings.

An object travels around a circle of radius 6 m with a speed of 3π ms−1. The distance and displacement after 3 seconds is _____ and _____, respectively.

A sample of KClO_3 on decomposition yielded 448ml of oxygen gas at STP then the weight of KClO_{} originally taken was

What is the magnitude of net force in the given situation?

50 At what speed the velocity head of water is equal to pressure head of 40cm of mercury ??

Which is the fastest method of heat transfer–conduction, convection or radiation?

What is drought?

Fig. 13.15 shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster?Fig. 13.15 Distance-time graph for the motion of two cars

Harish runs faster than Suresh to cover the same distance. Which fundamental physical quantity is used for comparing their speeds?

What is Relation between angle of dip and magnetic latitude at that point ?

Why cyclones are prone to Indian coastline

The lengths of the sides of a triangle are in the ratio 3 : 4 : 5 and its perimeter is 144 cm. Find the height corresponding to the longest side.

What is the colour of an electron?

An infinitely large thin plane sheet has a uniform surface charge density +σ. Obtain the expression for the amount of work done in bringing a point charge q from infinity to a point, dis†an ce r, in front of the charged plane sheet.

the image of an object A before a plane mirror LM is seen at the point B by an observer at D as shown in the figure. prove that the image is as far behind the mirror as the object is in front of the mirror

For the reaction 2HI(g) H2(g) +I2(g), the degree of dissociation (a) of HI(g) is related to equilibrium constant kp by the relation?

A body travels 200 cm in the first two seconds and 220 cm in the next four seconds. The average speed of the body for the entire journey is .

nt300 gm of water at 25c is added to 100 gm of ice at 0C. THE FINAL TEMP OF MIXTURE ISn

What is a natural magnet known as?

List the qualities that a good mirror must have.

Question 2Signs of the abscissa and ordinate of a point in the second quadrant are respectively;A) +,+B) -,-C) -,+​​​​​​​D)​​​​​​​ +,-​​​​​​​

An object travels around a circle of radius 6 m with a speed of 3π ms−1. The distance and displacement after 3 seconds is _ and _, respectively.

Question 2Signs of the abscissa and ordinate of a point in the second quadrant are respectively;A) +,+B) -,-C) -,+D) +,-