16569 + Interview Questions in Physics Page 324 InterviewSolution

16151.	On the basis of the experiment, "To trace the path of a ray of light through a rectangular glass slab", students of a class arrived at which one of the following conclusions?
Answer» On the basis of the experiment, "To trace the path of a ray of light through a rectangular glass slab", students of a class arrived at which one of the following conclusions?

Discussion

16152.	The diagram given above show α particle, γ rays and cathode ray separately passing through an electric field created between two electrically charged plates (one positive, one negative). What will be the deflection of these particles/rays when they pass between the charged plates?
Answer» The diagram given above show α particle, γ rays and cathode ray separately passing through an electric field created between two electrically charged plates (one positive, one negative). What will be the deflection of these particles/rays when they pass between the charged plates?

16152.

The diagram given above show α particle, γ rays and cathode ray separately passing through an electric field created between two electrically charged plates (one positive, one negative). What will be the deflection of these particles/rays when they pass between the charged plates?

Answer»

The diagram given above show α particle, γ rays and cathode ray separately passing through an electric field created between two electrically charged plates (one positive, one negative). What will be the deflection of these particles/rays when they pass between the charged plates?

Discussion

16153.	A meter rule can be balanced about 60 cm mark by placing a block of weight ‘m’ g at 90 cm mark. If the mass of the ruler is 80g & another block of weight ‘m’ is placed at 100cm mark, then calculate the weight that should be placed at 40cm position to balance the ruler.
Answer» A meter rule can be balanced about 60 cm mark by placing a block of weight ‘m’ g at 90 cm mark. If the mass of the ruler is 80g & another block of weight ‘m’ is placed at 100cm mark, then calculate the weight that should be placed at 40cm position to balance the ruler.

Discussion

16154.	Which is the ultimate source of energy on earth?
Answer» Which is the ultimate source of energy on earth?

Discussion

16155.	Linear motion of the piston in a heat engine is converted into rotary motion by ___ .
Answer» Linear motion of the piston in a heat engine is converted into rotary motion by ___ .

Discussion

16156.	The constant temperature at which solid changes to a liquid called as___point.
Answer» The constant temperature at which solid changes to a liquid called as___point.

Discussion

16157.	Figure below shows some of the important features of a cathode ray tube. What does 'S' and 'T' represent in the diagram?
Answer» Figure below shows some of the important features of a cathode ray tube. What does 'S' and 'T' represent in the diagram?

16157.

Figure below shows some of the important features of a cathode ray tube. What does 'S' and 'T' represent in the diagram?

Answer»

Figure below shows some of the important features of a cathode ray tube.

What does 'S' and 'T' represent in the diagram?

Discussion

16158.	What is the term used to describe a large scale forest with only a single type of vegetation? __
Answer» What is the term used to describe a large scale forest with only a single type of vegetation? __

Discussion

16159.	What would happen to the person if cerebellum of his brain is damaged?
Answer» What would happen to the person if cerebellum of his brain is damaged?

Discussion

16160.	Is torque is a scalar or vector quantity?
Answer» Is torque is a scalar or vector quantity?

Discussion

16161.	Which coloured light has the largest wavelength?
Answer» Which coloured light has the largest wavelength?

Discussion

16162.	State which surface of a plane mirror reflects most of the light incident on it : the front smooth surface or the back silvered surface.
Answer» State which surface of a plane mirror reflects most of the light incident on it : the front smooth surface or the back silvered surface.

Discussion

16163.	Two resistances of 100 Ω and 0 Ω are connected in parallel. The effective resistance will be:
Answer» Two resistances of 100 Ω and 0 Ω are connected in parallel. The effective resistance will be:

Discussion

16164.	In a hydropower plant,___is converted to____, which is further used to rotate turbines.
Answer» In a hydropower plant,___is converted to____, which is further used to rotate turbines.

Discussion

16165.	A nuclear power plant generates electric power of 200 MW using the nuclear fusion of U-235. How much uranium is consumed in a day to produce the electric power, if one U-235 nucleus produces 190 MeV of energy?
Answer» A nuclear power plant generates electric power of 200 MW using the nuclear fusion of U-235. How much uranium is consumed in a day to produce the electric power, if one U-235 nucleus produces 190 MeV of energy?

Discussion

16166.	Explain the principle of van de Graff generator.
Answer» Explain the principle of van de Graff generator.

Discussion

16167.	Jill and Maggi are playing on a seesaw. Jill weighs 450 N and Maggi weighs 300 N. Jill is on one side sitting 3 m away from the pivot. How far away must Maggi sit (w.r.t pivot) to balance seesaw?4.5
Answer» Jill and Maggi are playing on a seesaw. Jill weighs $450 N$ and Maggi weighs $300 N$ . Jill is on one side sitting $3 m$ away from the pivot. How far away must Maggi sit (w.r.t pivot) to balance seesaw? 4.5

Discussion

16168.	What is meant by potential difference??
Answer» What is meant by potential difference??

Discussion

16169.	A 10 cm tall candle, when viewed using a convex lens appears to be 20 cm tall. The focal length is 5 cm. What is the object distance?
Answer» A 10 cm tall candle, when viewed using a convex lens appears to be 20 cm tall. The focal length is 5 cm. What is the object distance?

16169.

A 10 cm tall candle, when viewed using a convex lens appears to be 20 cm tall. The focal length is 5 cm. What is the object distance?

Answer»

A 10 cm tall candle, when viewed using a convex lens appears to be 20 cm tall. The focal length is 5 cm. What is the object distance?

Discussion

16170.	When a potential difference exists between two points in a solid conductor and a wire connects those points, which of the following happens?
Answer» When a potential difference exists between two points in a solid conductor and a wire connects those points, which of the following happens?

Discussion

16171.	Two resistances R1 and R2 give an equivalent resistance of 4.5 Ω when connected in series and 1 Ω when connected in parallel. Then the value of resistances are___________.
Answer» Two resistances $R_{1}$ and $R_{2}$ give an equivalent resistance of 4.5 $Ω$ when connected in series and 1 $Ω$ when connected in parallel. Then the value of resistances are___________.

Discussion

16172.	A uniform chain of mass m and length l is lying on the table such that its one-fifth part is hanging from the edge of the table. What minimum work is required to lift this part of the chain on the table?
Answer» A uniform chain of mass m and length l is lying on the table such that its one-fifth part is hanging from the edge of the table. What minimum work is required to lift this part of the chain on the table?

Discussion

16173.	Refraction of light in human eye occurs mostly at ___ .
Answer» Refraction of light in human eye occurs mostly at ___ .

Discussion

16174.	In the earlier question, the atomic number of the atom is said to be 11. Since we know that the atomic number of the atom represents the number of protons in that atom, the number of electrons in that atom will be ___
Answer» In the earlier question, the atomic number of the atom is said to be 11. Since we know that the atomic number of the atom represents the number of protons in that atom, the number of electrons in that atom will be ___

Discussion

16175.	A 1 cm tall light bulb is placed at a distance of 50 cm from a convex mirror having a focal length of 10 cm. The height of the image is:
Answer» A 1 cm tall light bulb is placed at a distance of 50 cm from a convex mirror having a focal length of 10 cm. The height of the image is:

Discussion

16176.	Two waves A and B have wavelength 0.01 ∘A and 9000 ∘A respectively. (a) Name the two waves. (b) Compare the speeds of these waves when they travel in vacuum.
Answer» Two waves A and B have wavelength 0.01 $\circ A$ and 9000 $\circ A$ respectively. (a) Name the two waves. (b) Compare the speeds of these waves when they travel in vacuum.

16176.

Two waves A and B have wavelength 0.01 ∘A and 9000 ∘A respectively. (a) Name the two waves. (b) Compare the speeds of these waves when they travel in vacuum.

Answer»

Two waves A and B have wavelength 0.01 $\circ A$ and 9000 $\circ A$ respectively.

(a) Name the two waves.

(b) Compare the speeds of these waves when they travel in vacuum.

Discussion

16177.	what happens to the electron in a circuit when it is switched off?
Answer» what happens to the electron in a circuit when it is switched off?

Discussion

16178.	List three factors which can cause overloading of domestic electric circuits
Answer» List three factors which can cause overloading of domestic electric circuits

Discussion

16179.	An electric kettle for use in a 230 V supply is rated at 3000 W. For safe working what should be the current carried by a cable connected to it?
Answer» An electric kettle for use in a 230 V supply is rated at 3000 W. For safe working what should be the current carried by a cable connected to it?

Discussion

16180.	An object is placed at a distance of 25 cmfrom a spherical mirror and its image is formed behind the mirror at the distance of 5 cm.Find the focal length of mirror.Name the type of mirror and one of its uses.
Answer» An object is placed at a distance of 25 cmfrom a spherical mirror and its image is formed behind the mirror at the distance of 5 cm.Find the focal length of mirror.Name the type of mirror and one of its uses.

Discussion

16181.	If an electron while coming vertically from outerspace enter the earth's magnetic field, then in which direction will the electron deflect ?
Answer» If an electron while coming vertically from outerspace enter the earth's magnetic field, then in which direction will the electron deflect ?

Discussion

16182.	What is the function of brushes in electric motor and generator?
Answer» What is the function of brushes in electric motor and generator?

Discussion

16183.	Calculate the value of electric current if 5*10^21 electron are passed through circuit every minute
Answer» Calculate the value of electric current if 5*10^21 electron are passed through circuit every minute

Discussion

16184.	He climbed the cliff. He held on to the rope steadily. Which combination uses a participle?
Answer» He climbed the cliff. He held on to the rope steadily. Which combination uses a participle?

16184.

He climbed the cliff. He held on to the rope steadily. Which combination uses a participle?

Answer»

He climbed the cliff. He held on to the rope steadily.

Which combination uses a participle?

Discussion

16185.	Draw the ray diagram and also state the position, the relative size and the nature of image formed by a concave mirror when the object is placed at the centre of curvature of the mirror.
Answer» Draw the ray diagram and also state the position, the relative size and the nature of image formed by a concave mirror when the object is placed at the centre of curvature of the mirror.

Discussion

16186.	Pick out the sources of noise pollution in your surroundings.
Answer» Pick out the sources of noise pollution in your surroundings.

Discussion

16187.	If q amount of heat is supplied to a system, the work done by the system is w. What is the change in internal energy of the system?
Answer» If q amount of heat is supplied to a system, the work done by the system is w. What is the change in internal energy of the system?

Discussion

16188.	A man sits in an optician's chair, looking into a plane mirror which is 2 m away from him and views the image of a chart which faces the mirror and is 50 cm behind his head. How far away from his eyes does the chart appear to be ?
Answer» A man sits in an optician's chair, looking into a plane mirror which is 2 m away from him and views the image of a chart which faces the mirror and is 50 cm behind his head. How far away from his eyes does the chart appear to be ?

Discussion

16189.	The wavelength of waves produced by a source is 50 cm. If wave velocity is 25 ms, what is the time required for one wave?
Answer» The wavelength of waves produced by a source is 50 cm. If wave velocity is 25 $\frac{m}{s}$ , what is the time required for one wave?

Discussion

16190.	___is the satellite launch vehicle for Geosynchronous satellites.
Answer» ___is the satellite launch vehicle for Geosynchronous satellites.

Discussion

16191.	If AB is an object, CD is an image formed. If AP is object distance CP is image distance from the mirror. Then choose the correct sign convention. 1. height of image = + ve 2. height of image = – ve 3. height of object = + ve 4. height of object = – ve 5. AP = + ve 6. AP = – ve 7. PC = + ve 8. PC = – ve.
Answer» If AB is an object, CD is an image formed. If AP is object distance CP is image distance from the mirror. Then choose the correct sign convention. 1. height of image = + ve 2. height of image = – ve 3. height of object = + ve 4. height of object = – ve 5. AP = + ve 6. AP = – ve 7. PC = + ve 8. PC = – ve.

16191.

If AB is an object, CD is an image formed. If AP is object distance CP is image distance from the mirror. Then choose the correct sign convention. 1. height of image = + ve 2. height of image = – ve 3. height of object = + ve 4. height of object = – ve 5. AP = + ve 6. AP = – ve 7. PC = + ve 8. PC = – ve.

Answer»

If AB is an object, CD is an image formed. If AP is object distance CP is image distance from the mirror. Then choose the correct sign convention.

1. height of image = + ve 2. height of image = – ve

3. height of object = + ve 4. height of object = – ve

5. AP = + ve 6. AP = – ve

7. PC = + ve 8. PC = – ve.

Discussion

16192.	If a current carrying conductor is placed near a heap of iron filings, we can observe some disturbance in iron filings, because of
Answer» If a current carrying conductor is placed near a heap of iron filings, we can observe some disturbance in iron filings, because of

Discussion

16193.	A pulse was created in a slinky of length 4 m. It was observed that it returned, after reflection, at the point of creation 6 times in10 s. Calculate the speed of the pulse.
Answer» A pulse was created in a slinky of length 4 m. It was observed that it returned, after reflection, at the point of creation 6 times in10 s. Calculate the speed of the pulse.

Discussion

16194.	The periodic vibrations of a body in the absence of any external force is called:
Answer» The periodic vibrations of a body in the absence of any external force is called:

Discussion

16195.	Ram learned in high school that electric current is the flow of electrons. Ram’s teacher had also told him that at any temperature the electrons of any metal move very randomly with very high speeds (around 100km/second). So Ram imagines that when a current flows through a conductor, this random motion must cease and all electrons move in one particular direction like a marching army (flow in a sense)
Answer» Ram learned in high school that electric current is the flow of electrons. Ram’s teacher had also told him that at any temperature the electrons of any metal move very randomly with very high speeds (around 100km/second). So Ram imagines that when a current flows through a conductor, this random motion must cease and all electrons move in one particular direction like a marching army (flow in a sense)

Discussion

16196.	Which will glow brighter,100w bulb or 200 w bulb if they are joined in series and the supplied voltage is 5 v?
Answer» Which will glow brighter,100w bulb or 200 w bulb if they are joined in series and the supplied voltage is 5 v?

Discussion

16197.	The reisistivity of copper metal depends on only one of the following factors. This factor is : (a) length (b) thickness (c) temperature (d) area of cross -section
Answer» The reisistivity of copper metal depends on only one of the following factors. This factor is : (a) length (b) thickness (c) temperature (d) area of cross -section

Discussion

16198.	Draw a ray diagram to show the appearance of a stick partially immersed in water. Explain your answer.
Answer» Draw a ray diagram to show the appearance of a stick partially immersed in water. Explain your answer.

Discussion

16199.	What is meant by a source of energy?
Answer» What is meant by a source of energy?

Discussion

16200.	Photons r particles that have energy ... That have velocity ...do they posses mass?
Answer» Photons r particles that have energy ... That have velocity ...do they posses mass?

Discussion

Explore topic-wise InterviewSolutions in .

On the basis of the experiment, "To trace the path of a ray of light through a rectangular glass slab", students of a class arrived at which one of the following conclusions?

The diagram given above show α particle, γ rays and cathode ray separately passing through an electric field created between two electrically charged plates (one positive, one negative). What will be the deflection of these particles/rays when they pass between the charged plates?

A meter rule can be balanced about 60 cm mark by placing a block of weight ‘m’ g at 90 cm mark. If the mass of the ruler is 80g &amp; another block of weight ‘m’ is placed at 100cm mark, then calculate the weight that should be placed at 40cm position to balance the ruler.

Which is the ultimate source of energy on earth?

Linear motion of the piston in a heat engine is converted into rotary motion by ___ .

The constant temperature at which solid changes to a liquid called as___point.

Figure below shows some of the important features of a cathode ray tube. What does 'S' and 'T' represent in the diagram?

What is the term used to describe a large scale forest with only a single type of vegetation? __

What would happen to the person if cerebellum of his brain is damaged?

Is torque is a scalar or vector quantity?

Which coloured light has the largest wavelength?

State which surface of a plane mirror reflects most of the light incident on it : the front smooth surface or the back silvered surface.

Two resistances of 100 Ω and 0 Ω are connected in parallel. The effective resistance will be:

In a hydropower plant,___is converted to____, which is further used to rotate turbines.

A nuclear power plant generates electric power of 200 MW using the nuclear fusion of U-235. How much uranium is consumed in a day to produce the electric power, if one U-235 nucleus produces 190 MeV of energy?

Explain the principle of van de Graff generator.

Jill and Maggi are playing on a seesaw. Jill weighs 450 N and Maggi weighs 300 N. Jill is on one side sitting 3 m away from the pivot. How far away must Maggi sit (w.r.t pivot) to balance seesaw?4.5

What is meant by potential difference??

A 10 cm tall candle, when viewed using a convex lens appears to be 20 cm tall. The focal length is 5 cm. What is the object distance?

When a potential difference exists between two points in a solid conductor and a wire connects those points, which of the following happens?

Two resistances R1 and R2 give an equivalent resistance of 4.5 Ω when connected in series and 1 Ω when connected in parallel. Then the value of resistances are___________.​

A uniform chain of mass m and length l is lying on the table such that its one-fifth part is hanging from the edge of the table. What minimum work is required to lift this part of the chain on the table?

Refraction of light in human eye occurs mostly at ___ .

In the earlier question, the atomic number of the atom is said to be 11. Since we know that the atomic number of the atom represents the number of protons in that atom, the number of electrons in that atom will be ___

A 1 cm tall light bulb is placed at a distance of 50 cm from a convex mirror having a focal length of 10 cm. The height of the image is:

Two waves A and B have wavelength 0.01 ∘A and 9000 ∘A respectively. (a) Name the two waves. (b) Compare the speeds of these waves when they travel in vacuum.

what happens to the electron in a circuit when it is switched off?

List three factors which can cause overloading of domestic electric circuits

An electric kettle for use in a 230 V supply is rated at 3000 W. For safe working what should be the current carried by a cable connected to it?

An object is placed at a distance of 25 cmfrom a spherical mirror and its image is formed behind the mirror at the distance of 5 cm.Find the focal length of mirror.Name the type of mirror and one of its uses.

If an electron while coming vertically from outerspace enter the earth's magnetic field, then in which direction will the electron deflect ?

What is the function of brushes in electric motor and generator?

Calculate the value of electric current if 5*10^21 electron are passed through circuit every minute

He climbed the cliff. He held on to the rope steadily. Which combination uses a participle?

Draw the ray diagram and also state the position, the relative size and the nature of image formed by a concave mirror when the object is placed at the centre of curvature of the mirror.

Pick out the sources of noise pollution in your surroundings.

If q amount of heat is supplied to a system, the work done by the system is w. What is the change in internal energy of the system?

A man sits in an optician's chair, looking into a plane mirror which is 2 m away from him and views the image of a chart which faces the mirror and is 50 cm behind his head. How far away from his eyes does the chart appear to be ?

The wavelength of waves produced by a source is 50 cm. If wave velocity is 25 ms, what is the time required for one wave?

___is the satellite launch vehicle for Geosynchronous satellites.

If a current carrying conductor is placed near a heap of iron filings, we can observe some disturbance in iron filings, because of

A pulse was created in a slinky of length 4 m. It was observed that it returned, after reflection, at the point of creation 6 times in10 s. Calculate the speed of the pulse.

The periodic vibrations of a body in the absence of any external force is called:

Which will glow brighter,100w bulb or 200 w bulb if they are joined in series and the supplied voltage is 5 v?

The reisistivity of copper metal depends on only one of the following factors. This factor is : (a) length (b) thickness (c) temperature (d) area of cross -section

Draw a ray diagram to show the appearance of a stick partially immersed in water. Explain your answer.

What is meant by a source of energy?

Photons r particles that have energy ... That have velocity ...do they posses mass?

A meter rule can be balanced about 60 cm mark by placing a block of weight ‘m’ g at 90 cm mark. If the mass of the ruler is 80g & another block of weight ‘m’ is placed at 100cm mark, then calculate the weight that should be placed at 40cm position to balance the ruler.

In a hydropower plant,_is converted to__, which is further used to rotate turbines.

Two resistances R1 and R2 give an equivalent resistance of 4.5 Ω when connected in series and 1 Ω when connected in parallel. Then the value of resistances are___________.