9478 + Interview Questions in Physics Page 36 InterviewSolution

1751.	The state of rest and motion of body are
Answer» The state of rest and motion of body are

Discussion

1752.	The S.I. unit of electric flux is
Answer» The S.I. unit of electric flux is

Discussion

1753.	Among the following statements, which statement depicts wrong characteristics of mars? Statement I: Planet mars appear as a red planet. Statement II: Mars planet has two natural satellites.
Answer» Among the following statements, which statement depicts wrong characteristics of mars? Statement I: Planet mars appear as a red planet. Statement II: Mars planet has two natural satellites.

Discussion

1754.	Find the charge of 48 g of Mg2\ast ions in coulombs(1) 2.4 x 1023 C(2) 6.82 x 105 C(3) 3.86 x 105 c(4) 1.93 x 105 C
Answer» Find the charge of 48 g of Mg2\ast ions in coulombs(1) 2.4 x 1023 C(2) 6.82 x 105 C(3) 3.86 x 105 c(4) 1.93 x 105 C

Discussion

1755.	If A = {x2 + y2 = 16} and B = {9x2 + 25y2 = 225}.Then n(A ∩ B) is equal to
Answer» If A = {x2 + y2 = 16} and B = {9x2 + 25y2 = 225}. Then n(A ∩ B) is equal to

Discussion

1756.	In which state of matter is the friction the greatest i.e. friction in which State of matter causes most resistance.Plz. explain.
Answer» In which state of matter is the friction the greatest i.e. friction in which State of matter causes most resistance.Plz. explain.

Discussion

1757.	39.what is instantaneous acceleration
Answer» 39.what is instantaneous acceleration

Discussion

1758.	6. If the loudest of sound from a point source at distance of 10 metre is hundred decibals then the loudest level at distance of 5 metre from the point source is
Answer» 6. If the loudest of sound from a point source at distance of 10 metre is hundred decibals then the loudest level at distance of 5 metre from the point source is

Discussion

1759.	What is the solar system? Explain.
Answer» What is the solar system? Explain.

Discussion

1760.	Meteor burst up when they come near earth atmosphere.Which force is responsible for it? What is the fact around it?
Answer» Meteor burst up when they come near earth atmosphere.Which force is responsible for it? What is the fact around it?

Discussion

1761.	Where is algebra of statements video in mathematical reasoning?
Answer» Where is algebra of statements video in mathematical reasoning?

Discussion

1762.	The space between two coaxial cylinders of radius a and 2a and length l is filled with a liquid of coefficient of viscosity n. The inner cylinder is stationary and the outer cylinder is being rotated with constant angular speed w about its axis. The orque required is
Answer» The space between two coaxial cylinders of radius a and 2a and length l is filled with a liquid of coefficient of viscosity n. The inner cylinder is stationary and the outer cylinder is being rotated with constant angular speed w about its axis. The orque required is

Discussion

1763.	Is cotton solid?
Answer» Is cotton solid?

Discussion

1764.	Riaz needs a box which can absorb heat from the sun very fast but lose it very slowly. How should the outer and the inner surfaces of the box be coloured so that he gets the best result?
Answer» Riaz needs a box which can absorb heat from the sun very fast but lose it very slowly. How should the outer and the inner surfaces of the box be coloured so that he gets the best result?

Discussion

1765.	A freely suspended magnet comes to rest in the north-south direction. Why is that so?
Answer» A freely suspended magnet comes to rest in the north-south direction. Why is that so?

Discussion

1766.	40.2sinusoidal waves with same wavelength and amplitude traveling in opposite direction along a string with speed 10m/s .If min time interval between two instants when the string is flat is 0.5second ,the wavelength of the waves ?
Answer» 40.2sinusoidal waves with same wavelength and amplitude traveling in opposite direction along a string with speed 10m/s .If min time interval between two instants when the string is flat is 0.5second ,the wavelength of the waves ?

Discussion

1767.	Why hydroflouric acid is alone weak electrolyte other hydro halides are strong electrolyte
Answer» Why hydroflouric acid is alone weak electrolyte other hydro halides are strong electrolyte

Discussion

1768.	is the conc of reac†an t and product equal at chemical equilibriu
Answer» is the conc of reac†an t and product equal at chemical equilibriu

Discussion

1769.	Can something be at temperature of absolute zero?If yes then which thing and why ?
Answer» Can something be at temperature of absolute zero?If yes then which thing and why ?

Discussion

1770.	Question 15Plastic straws A and B are rubbed with dry cotton cloth. What will happen, if they are brought near each other?
Answer» Question 15 Plastic straws A and B are rubbed with dry cotton cloth. What will happen, if they are brought near each other?

1770.

Question 15Plastic straws A and B are rubbed with dry cotton cloth. What will happen, if they are brought near each other?

Answer»

Question 15

Plastic straws A and B are rubbed with dry cotton cloth. What will happen, if they are brought near each other?

Discussion

1771.	23.A bus address acceleration uniformly to a velocity of 1728km per hour in 12 second find the value of acceleration find the distance covered by the bus?
Answer» 23.A bus address acceleration uniformly to a velocity of 1728km per hour in 12 second find the value of acceleration find the distance covered by the bus?

Discussion

1772.	Explain the working of a rubber sucker.
Answer» Explain the working of a rubber sucker.

Discussion

1773.	A pendulum oscillates 40 times in 4 seconds, and then the time period obtained is
Answer» A pendulum oscillates 40 times in 4 seconds, and then the time period obtained is

Discussion

1774.	Speed of light in astronomical unit
Answer» Speed of light in astronomical unit

Discussion

1775.	What is the relative strength of fundamental forces?
Answer» What is the relative strength of fundamental forces?

Discussion

1776.	Venus is hotter than mercury although it is far from the sun than mercury why?
Answer» Venus is hotter than mercury although it is far from the sun than mercury why?

Discussion

1777.	what is phenoxide io
Answer» what is phenoxide io

Discussion

1778.	What is the least count not of a measuring instrument?
Answer» What is the least count not of a measuring instrument?

Discussion

1779.	Average frictional force needed to stop a car weighing 500kg in a dist 25m if initial speed is 72km/ hr.
Answer» Average frictional force needed to stop a car weighing 500kg in a dist 25m if initial speed is 72km/ hr.

Discussion

1780.	Twelve cells ,each having emf E volts are connected in series and are kept in a closed box.Some of these cells are wrongly conneted with positive and negitive terminals reversed .This 12 cell battery is connected in series with an ammeter, an external resis†an ce R ohm and a two cell battery ( two cells of the same type used earlier connected perfectly in series ) The current in the circuit when the 12 cell battery and 2 cell battery aid each other is 3A and is 2A when the y oppose each other.Then the number of cells in 12cell battery tha are connected wrongly is
Answer» Twelve cells ,each having emf E volts are connected in series and are kept in a closed box.Some of these cells are wrongly conneted with positive and negitive terminals reversed .This 12 cell battery is connected in series with an ammeter, an external resis†an ce R ohm and a two cell battery ( two cells of the same type used earlier connected perfectly in series ) The current in the circuit when the 12 cell battery and 2 cell battery aid each other is 3A and is 2A when the y oppose each other.Then the number of cells in 12cell battery tha are connected wrongly is

Discussion

1781.	The potential difference across a resistance is equal to the ___ measured across it.
Answer» The potential difference across a resistance is equal to the ___ measured across it.

Discussion

1782.	Explain with an example to demonstrate that when a liquid evaporates, it takes heat from its surroundings.
Answer» Explain with an example to demonstrate that when a liquid evaporates, it takes heat from its surroundings.

Discussion

1783.	16. When the size of a soap bubble is increased by pushingmore air in it, the surface area increases. Does it meanthat the average separation between the surface molecules is increased
Answer» 16. When the size of a soap bubble is increased by pushingmore air in it, the surface area increases. Does it meanthat the average separation between the surface molecules is increased

Discussion

1784.	A beam of white light falling on a glass prism gets split up into seven colors marked 1 to 7 as shown in the diagram.Which two positions correspond closely to the color of:(a) a solution of potassium permanganate?(b) 'danger' or stop signal lights?
Answer» A beam of white light falling on a glass prism gets split up into seven colors marked 1 to 7 as shown in the diagram. Which two positions correspond closely to the color of: (a) a solution of potassium permanganate? (b) 'danger' or stop signal lights?

Discussion

1785.	Is frictional force dependent of surface area of object in contact
Answer» Is frictional force dependent of surface area of object in contact

Discussion

1786.	If an object is placed at a distance of 0.5 m in front of a plane mirror, the distance between the object and the image formed by the mirror will be
Answer» If an object is placed at a distance of $0.5 m$ in front of a plane mirror, the distance between the object and the image formed by the mirror will be

Discussion

1787.	109.The work done by a thermodynamic system in the process A-B-C is 30 j and heat absorbed by the system in the same process is 4j The change in internal energy in the process is
Answer» 109.The work done by a thermodynamic system in the process A-B-C is 30 j and heat absorbed by the system in the same process is 4j The change in internal energy in the process is

Discussion

1788.	A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in figure. In which of the following cases, after dispersion, the third color from the top corresponds to the color of the sky?
Answer» A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in figure. In which of the following cases, after dispersion, the third color from the top corresponds to the color of the sky?

Discussion

1789.	If an object is placed between two mirrors held perpendicular to each other. Then number of images formed is
Answer» If an object is placed between two mirrors held perpendicular to each other. Then number of images formed is

Discussion

1790.	if log x^2-x to the base x + 3
Answer» if log x^2-x to the base x + 3 <1 is satisfied for x belongs to(a,b) to be the value of a + b is equal to

Discussion

1791.	A disc of radius R has surface charge density σ=σ0r, where r is the distance from the centre of the disc. Find the total charge on the disc.
Answer» A disc of radius $R$ has surface charge density $σ = σ_{0} r$ , where $r$ is the distance from the centre of the disc. Find the total charge on the disc.

Discussion

1792.	When a horizontal force P acts on a cart of mass 20 kg it moves with a constant velocity. When the force of 1.2 P acts on the same cart it moves with an acceleration of 0.05 m/s2 to find the value of P.
Answer» When a horizontal force P acts on a cart of mass 20 kg it moves with a constant velocity. When the force of 1.2 P acts on the same cart it moves with an acceleration of 0.05 m/ $s^{2}$ to find the value of P.

Discussion

1793.	What is sign convention of mirror?
Answer» What is sign convention of mirror?

Discussion

1794.	Which of the following metals should be electroplated on a tiffin box made of steel ? (a) copper (b) chromium (c) silver (d) tin
Answer» Which of the following metals should be electroplated on a tiffin box made of steel ? (a) copper (b) chromium (c) silver (d) tin

Discussion

1795.	Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion.
Answer» Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion.

Discussion

1796.	Answer the following question: A. Why is sliding friction less than static friction for the same surface? B. A book of mass 1 kg is at rest on the table. Maximum value of static friction is 5N and sliding friction is 4N. Now, Answer: i. If we apply a force of 4.5N will the body move from rest? ii. If we apply a force of 6N will the body move from rest? [5 MARKS]
Answer» Answer the following question: A. Why is sliding friction less than static friction for the same surface? B. A book of mass 1 kg is at rest on the table. Maximum value of static friction is 5N and sliding friction is 4N. Now, Answer: i. If we apply a force of 4.5N will the body move from rest? ii. If we apply a force of 6N will the body move from rest? [5 MARKS]

Discussion

1797.	A student had heard that rainwater is as good as distilled water. So, he collected some rainwater in a clean glass beaker and tested it. To his surprise he found that the compass needle showed deflection. What could be the reason ?
Answer» A student had heard that rainwater is as good as distilled water. So, he collected some rainwater in a clean glass beaker and tested it. To his surprise he found that the compass needle showed deflection. What could be the reason ?

Discussion

1798.	Four cells, each of emf E and internal resistance r, are connected in series across an external resistance R. Bymistake, one of the cells is connected in reverse. Then,the current in the external circuit i
Answer» Four cells, each of emf E and internal resistance r, are connected in series across an external resistance R. Bymistake, one of the cells is connected in reverse. Then,the current in the external circuit i

Discussion

1799.	A concave mirror forms a real image of the same size as that of the object when the object is placed at:
Answer» A concave mirror forms a real image of the same size as that of the object when the object is placed at:

Discussion

1800.	What is the impact called that a body can produce due to the combined effect of mass and velocity ? Name it's unit. [2 MARKS]
Answer» What is the impact called that a body can produce due to the combined effect of mass and velocity ? Name it's unit. [2 MARKS]

Discussion

Explore topic-wise InterviewSolutions in .

The state of rest and motion of body are

The S.I. unit of electric flux is

Among the following statements, which statement depicts wrong characteristics of mars? Statement I: Planet mars appear as a red planet. Statement II: Mars planet has two natural satellites.

Find the charge of 48 g of Mg2\ast ions in coulombs(1) 2.4 x 1023 C(2) 6.82 x 105 C(3) 3.86 x 105 c(4) 1.93 x 105 C

If A = {x2 + y2 = 16} and B = {9x2 + 25y2 = 225}.Then n(A ∩ B) is equal to

In which state of matter is the friction the greatest i.e. friction in which State of matter causes most resistance.Plz. explain.

39.what is instantaneous acceleration

6. If the loudest of sound from a point source at distance of 10 metre is hundred decibals then the loudest level at distance of 5 metre from the point source is

What is the solar system? Explain.

Meteor burst up when they come near earth atmosphere.Which force is responsible for it? What is the fact around it?

Where is algebra of statements video in mathematical reasoning?

The space between two coaxial cylinders of radius a and 2a and length l is filled with a liquid of coefficient of viscosity n. The inner cylinder is stationary and the outer cylinder is being rotated with constant angular speed w about its axis. The orque required is

Is cotton solid?

Riaz needs a box which can absorb heat from the sun very fast but lose it very slowly. How should the outer and the inner surfaces of the box be coloured so that he gets the best result?

A freely suspended magnet comes to rest in the north-south direction. Why is that so?

40.2sinusoidal waves with same wavelength and amplitude traveling in opposite direction along a string with speed 10m/s .If min time interval between two instants when the string is flat is 0.5second ,the wavelength of the waves ?

Why hydroflouric acid is alone weak electrolyte other hydro halides are strong electrolyte

is the conc of reac†an t and product equal at chemical equilibriu

Can something be at temperature of absolute zero?If yes then which thing and why ?

Question 15Plastic straws A and B are rubbed with dry cotton cloth. What will happen, if they are brought near each other?

23.A bus address acceleration uniformly to a velocity of 1728km per hour in 12 second find the value of acceleration find the distance covered by the bus?

Explain the working of a rubber sucker.

A pendulum oscillates 40 times in 4 seconds, and then the time period obtained is

Speed of light in astronomical unit

What is the relative strength of fundamental forces?

Venus is hotter than mercury although it is far from the sun than mercury why?

what is phenoxide io

What is the least count not of a measuring instrument?

Average frictional force needed to stop a car weighing 500kg in a dist 25m if initial speed is 72km/ hr.

The potential difference across a resistance is equal to the ___ measured across it.

Explain with an example to demonstrate that when a liquid evaporates, it takes heat from its surroundings.

16. When the size of a soap bubble is increased by pushingmore air in it, the surface area increases. Does it meanthat the average separation between the surface molecules is increased

A beam of white light falling on a glass prism gets split up into seven colors marked 1 to 7 as shown in the diagram.Which two positions correspond closely to the color of:(a) a solution of potassium permanganate?​(b) 'danger' or stop signal lights?

Is frictional force dependent of surface area of object in contact

If an object is placed at a distance of 0.5 m in front of a plane mirror, the distance between the object and the image formed by the mirror will be

109.The work done by a thermodynamic system in the process A-B-C is 30 j and heat absorbed by the system in the same process is 4j The change in internal energy in the process is

A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in figure. In which of the following cases, after dispersion, the third color from the top corresponds to the color of the sky?

If an object is placed between two mirrors held perpendicular to each other. Then number of images formed is

if log x^2-x to the base x + 3

A disc of radius R has surface charge density σ=σ0r, where r is the distance from the centre of the disc. Find the total charge on the disc.

When a horizontal force P acts on a cart of mass 20 kg it moves with a constant velocity. When the force of 1.2 P acts on the same cart it moves with an acceleration of 0.05 m/s2 to find the value of P.

What is sign convention of mirror?

Which of the following metals should be electroplated on a tiffin box made of steel ? (a) copper (b) chromium (c) silver (d) tin

Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion.

A student had heard that rainwater is as good as distilled water. So, he collected some rainwater in a clean glass beaker and tested it. To his surprise he found that the compass needle showed deflection. What could be the reason ?

Four cells, each of emf E and internal resistance r, are connected in series across an external resistance R. Bymistake, one of the cells is connected in reverse. Then,the current in the external circuit i

A concave mirror forms a real image of the same size as that of the object when the object is placed at:

What is the impact called that a body can produce due to the combined effect of mass and velocity ? Name it's unit. [2 MARKS]

A beam of white light falling on a glass prism gets split up into seven colors marked 1 to 7 as shown in the diagram.Which two positions correspond closely to the color of:(a) a solution of potassium permanganate?(b) 'danger' or stop signal lights?