6277 + Interview Questions in Physics Page 57 InterviewSolution

2801.	The position x of a particle moving along x- axis is given as x = 4sin [ (4π/3)t + π/2 ] , where x is in metre and t is in second . The ratio of average speed and magnitude of average velocity of a particle for the time interval , t : greater than equal to 0 and less than equal to 2.25 .
Answer» The position x of a particle moving along x- axis is given as x = 4sin [ (4π/3)t + π/2 ] , where x is in metre and t is in second . The ratio of average speed and magnitude of average velocity of a particle for the time interval , t : greater than equal to 0 and less than equal to 2.25 .

Discussion

2802.	Why do opposite poles of magnets repel each other?
Answer» Why do opposite poles of magnets repel each other?

Discussion

2803.	Cooking pots are provided with wooden or plastic handles. Why?
Answer» Cooking pots are provided with wooden or plastic handles. Why?

Discussion

2804.	75.A uniform conductor of resistance R is cut into n equal pieces . Half of them are joined in seties and half in inparallel . If two combination are joined in series the effective resistance of all the pieces will be how much
Answer» 75.A uniform conductor of resistance R is cut into n equal pieces . Half of them are joined in seties and half in inparallel . If two combination are joined in series the effective resistance of all the pieces will be how much

Discussion

2805.	Which of the following is not a unit of time?
Answer» Which of the following is not a unit of time?

Discussion

2806.	When the object is at rest and the image is moving with velocity v. Then how the relative speed of image wrt object would be 2v?
Answer» When the object is at rest and the image is moving with velocity v. Then how the relative speed of image wrt object would be 2v?

Discussion

2807.	Why a brass tumbler feels much cooler than a wooden tray?
Answer» Why a brass tumbler feels much cooler than a wooden tray?

Discussion

2808.	WHAT IS DEVIATION WITHOUT DISPERSION
Answer» WHAT IS DEVIATION WITHOUT DISPERSION

Discussion

2809.	Name the component that breaks the electric circuit in case of excess current.
Answer» Name the component that breaks the electric circuit in case of excess current.

Discussion

2810.	Write an experiment to show that metals are good conductor of heat. Draw a labelled diagram also.
Answer» Write an experiment to show that metals are good conductor of heat. Draw a labelled diagram also.

Discussion

2811.	The Moon's distance from the earth is 360000 kilometres and its diameter subtends angle of 31' at the observer. Find the diameter of moon.
Answer» The Moon's distance from the earth is 360000 kilometres and its diameter subtends angle of 31' at the observer. Find the diameter of moon.

Discussion

2812.	The volumes of two cylinders are a : b and their heights are c :d. The ratio of their diameters .
Answer» The volumes of two cylinders are a : b and their heights are c :d. The ratio of their diameters .

Discussion

2813.	How is the reflection of light from a plane mirror different from the reflection of light from a plane sheet of paper?
Answer» How is the reflection of light from a plane mirror different from the reflection of light from a plane sheet of paper?

Discussion

2814.	A reaction in which there is no change in volume?1.Kp=Kc2.Kc= 0 Which option is correct and explain why
Answer» A reaction in which there is no change in volume? 1.Kp=Kc 2.Kc= 0 Which option is correct and explain why

Discussion

2815.	When the thumb is pointing in the ___, the direction of curl of fingers give the direction of magnetic field lines.
Answer» When the thumb is pointing in the ___, the direction of curl of fingers give the direction of magnetic field lines.

Discussion

2816.	Convert 36km/h to SI unit.
Answer» Convert $36 k m / h$ to SI unit.

Discussion

2817.	Define the term electroplating.
Answer» Define the term electroplating.

Discussion

2818.	Identify the animal which is capable of hearing infrasound from the following.
Answer» Identify the animal which is capable of hearing infrasound from the following.

Discussion

2819.	Mark the correct answer in each of the following:The converse of the statement "If sun is not shining, then sky is filled with clouds", is(a) If sky is filled with clouds, then sun is not shining.(b) If sun is shining, then sky is filled with clouds.(c) If sky is clear, then sun is shining.(d) If sun is not shining, then sky is not filled with clouds.
Answer» Mark the correct answer in each of the following: The converse of the statement "If sun is not shining, then sky is filled with clouds", is (a) If sky is filled with clouds, then sun is not shining. (b) If sun is shining, then sky is filled with clouds. (c) If sky is clear, then sun is shining. (d) If sun is not shining, then sky is not filled with clouds.

Discussion

2820.	How does a wheel help in moving an axle?
Answer» How does a wheel help in moving an axle?

Discussion

2821.	When a window is accidentally left open on a winter night, will you feel uncomfortable because the cold is getting in, or because the heat is escaping from the room?
Answer» When a window is accidentally left open on a winter night, will you feel uncomfortable because the cold is getting in, or because the heat is escaping from the room?

Discussion

2822.	Question 29 (b)Three incandescent bulbs of 100 W each are connected in series in an electric circuit. In another circuit, another set of three bulbs of the same wattage are connected in parallel to the same source.(b) Now let one bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason.
Answer» Question 29 (b) Three incandescent bulbs of 100 W each are connected in series in an electric circuit. In another circuit, another set of three bulbs of the same wattage are connected in parallel to the same source. (b) Now let one bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason.

Discussion

2823.	A body travels 200 cm in the first 2 s and 220 cm in the next 5 s. Calculate the velocity at the end of the seventh second from the start
Answer» A body travels 200 cm in the first 2 s and 220 cm in the next 5 s. Calculate the velocity at the end of the seventh second from the start

Discussion

2824.	What property of plane mirrors is used in periscope
Answer» What property of plane mirrors is used in periscope

Discussion

2825.	What is the pressure on a swimmer 20 m below the surface of water?
Answer» What is the pressure on a swimmer 20 m below the surface of water?

Discussion

2826.	State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook.(a) Cutting a log of wood into pieces is a chemical change.(b) Formation of manure from leaves is a physical change(c) Iron pipes coated with zinc do not get rusted easily.(d) Iron and rust are the same substances.(e) Condensation of steam is not a chemical change.
Answer» State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook. (a) Cutting a log of wood into pieces is a chemical change. (b) Formation of manure from leaves is a physical change (c) Iron pipes coated with zinc do not get rusted easily. (d) Iron and rust are the same substances. (e) Condensation of steam is not a chemical change.

2826.

State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook.(a) Cutting a log of wood into pieces is a chemical change.(b) Formation of manure from leaves is a physical change(c) Iron pipes coated with zinc do not get rusted easily.(d) Iron and rust are the same substances.(e) Condensation of steam is not a chemical change.

Answer»

State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook.

(a) Cutting a log of wood into pieces is a chemical change.

(b) Formation of manure from leaves is a physical change

(c) Iron pipes coated with zinc do not get rusted easily.

(d) Iron and rust are the same substances.

(e) Condensation of steam is not a chemical change.

Discussion

2827.	Question 148In rhombus BEAM, find ∠AME and ∠AEM.
Answer» Question 148 In rhombus BEAM, find $∠ A M E$ and $∠ A E M$ .

Discussion

2828.	Two spheres made of same substance have diameters in the ratio 1:2. Their thermal capacities are in theratio of(1) 1:2(2) 1: 8(3) 1:4(4) 2 :1
Answer» Two spheres made of same substance have diameters in the ratio 1:2. Their thermal capacities are in theratio of(1) 1:2(2) 1: 8(3) 1:4(4) 2 :1

Discussion

2829.	Define kinetic energy. Write the equation for kinetic energy. Two bodies of equal masses move with uniform velocities v and 3v respectively. Find the ratio of their kinetic energies. [5 MARKS]
Answer» Define kinetic energy. Write the equation for kinetic energy. Two bodies of equal masses move with uniform velocities v and 3v respectively. Find the ratio of their kinetic energies. [5 MARKS]

Discussion

2830.	Regulating body temperature is related to
Answer» Regulating body temperature is related to

Discussion

2831.	800 gram of ice at minus 15 degree celsius is mixed with 100 gram of water at 440 degree Celsius calculate the final temperature of the mixture when equilibrium is attend
Answer» 800 gram of ice at minus 15 degree celsius is mixed with 100 gram of water at 440 degree Celsius calculate the final temperature of the mixture when equilibrium is attend

Discussion

2832.	what is a gas?
Answer» what is a gas?

Discussion

2833.	A telescope is used to view the moon. What is the angle subtended by the moon at the telescope, if the focal length of objective lens of the telescope is 12 cm and the size of the image of the moon formed by the objective is 2 cm ?
Answer» A telescope is used to view the moon. What is the angle subtended by the moon at the telescope, if the focal length of objective lens of the telescope is $12 cm$ and the size of the image of the moon formed by the objective is $2 cm ?$

Discussion

2834.	Which of the following are unit(s) of distance?
Answer» Which of the following are unit(s) of distance?

Discussion

2835.	a particle moves from position (2,3,1)to position (3,2,1) in the action of F=1+2x.The value of work done by the force is
Answer» a particle moves from position (2,3,1)to position (3,2,1) in the action of F=1+2x.The value of work done by the force is

Discussion

2836.	A 50 KG block is kept on the rough horizontal surface and coefficient of limiting friction between surface and block is 0.1 Find the frictional force acting on block if a horizontal force of 15 N begins to act on the block (g=10m/s^2) (A)50 N (B) 20 N (C) 25 N (D 15 N
Answer» A 50 KG block is kept on the rough horizontal surface and coefficient of limiting friction between surface and block is 0.1 Find the frictional force acting on block if a horizontal force of 15 N begins to act on the block (g=10m/s^2) (A)50 N (B) 20 N (C) 25 N (D 15 N

Discussion

2837.	7.The position vector of a particle is determined by the expression r=3tsquarei+4tsquarej+7k .The displacement traversed in first 10 second is : A. 100m B. 150m C. 300m D. 500m Click here to view details:
Answer» 7.The position vector of a particle is determined by the expression r=3tsquarei+4tsquarej+7k .The displacement traversed in first 10 second is : A. 100m B. 150m C. 300m D. 500m Click here to view details:

Discussion

2838.	A battery if internal resistance 4 Ω is connected to the network of resistances as shown. What must be the value of R so that maximum power is delivered to the network?
Answer» A battery if internal resistance $4 Ω$ is connected to the network of resistances as shown. What must be the value of $R$ so that maximum power is delivered to the network?

Discussion

2839.	The electric feild at a point due to a point charge is 30N/C and the electric potential at that point is 15J/C.Calculate the distance of the point from the charge and the magnitude of the charge.
Answer» The electric feild at a point due to a point charge is 30N/C and the electric potential at that point is 15J/C.Calculate the distance of the point from the charge and the magnitude of the charge.

Discussion

2840.	Name two devices in which an electric cell is used. [1 MARK]
Answer» Name two devices in which an electric cell is used. [1 MARK]

Discussion

2841.	Question 3 (b)Give reason for the following observations.b. We can get the smell of perfume sitting several metres away.
Answer» Question 3 (b) Give reason for the following observations. b. We can get the smell of perfume sitting several metres away.

Discussion

2842.	126.Eight drops of Mercury each of equal radii and possessing equal charge combine to form a bigger drop.the capacitance of bigger drop as compared to each small drop is?
Answer» 126.Eight drops of Mercury each of equal radii and possessing equal charge combine to form a bigger drop.the capacitance of bigger drop as compared to each small drop is?

Discussion

2843.	If green leaves are seen in red light, they will appear
Answer» If green leaves are seen in red light, they will appear

Discussion

2844.	Why do electric generats when we rub two metals
Answer» Why do electric generats when we rub two metals

Discussion

2845.	Why do people make use of sliding friction in skiying and in sledeges?
Answer» Why do people make use of sliding friction in skiying and in sledeges?

Discussion

2846.	16. If the dimensions of length and force are increased 4 times how many times will the dimensions of energy increase ?
Answer» 16. If the dimensions of length and force are increased 4 times how many times will the dimensions of energy increase ?

Discussion

2847.	wind blowing from south at 10m/s but to a cyclist it appears to be blowing from the east at 10m/s the cyclist has a velocity(take east as i cap)
Answer» wind blowing from south at 10m/s but to a cyclist it appears to be blowing from the east at 10m/s the cyclist has a velocity(take east as i cap)

Discussion

2848.	36 kmhr= ___ ms
Answer» $36 \frac{k m}{h r}$ = ___ $\frac{m}{s}$

Discussion

2849.	An electric current is said to be flowing through a wire when:
Answer» An electric current is said to be flowing through a wire when:

Discussion

2850.	How is tornado different from cyclone ?
Answer» How is tornado different from cyclone ?

Discussion

Explore topic-wise InterviewSolutions in .

The position x of a particle moving along x- axis is given as x = 4sin [ (4π/3)t + π/2 ] , where x is in metre and t is in second . The ratio of average speed and magnitude of average velocity of a particle for the time interval , t : greater than equal to 0 and less than equal to 2.25 .

Why do opposite poles of magnets repel each other?

Cooking pots are provided with wooden or plastic handles. Why?

75.A uniform conductor of resistance R is cut into n equal pieces . Half of them are joined in seties and half in inparallel . If two combination are joined in series the effective resistance of all the pieces will be how much

Which of the following is not a unit of time?

When the object is at rest and the image is moving with velocity v. Then how the relative speed of image wrt object would be 2v?

Why a brass tumbler feels much cooler than a wooden tray?

WHAT IS DEVIATION WITHOUT DISPERSION

Name the component that breaks the electric circuit in case of excess current.

Write an experiment to show that metals are good conductor of heat. Draw a labelled diagram also.

The Moon's distance from the earth is 360000 kilometres and its diameter subtends angle of 31' at the observer. Find the diameter of moon.

The volumes of two cylinders are a : b and their heights are c :d. The ratio of their diameters .

How is the reflection of light from a plane mirror different from the reflection of light from a plane sheet of paper?

A reaction in which there is no change in volume?1.Kp=Kc2.Kc= 0 Which option is correct and explain why

When the thumb is pointing in the ___, the direction of curl of fingers give the direction of magnetic field lines.

Convert 36km/h to SI unit.

Define the term electroplating.

Identify the animal which is capable of hearing infrasound from the following.

How does a wheel help in moving an axle?

When a window is accidentally left open on a winter night, will you feel uncomfortable because the cold is getting in, or because the heat is escaping from the room?

A body travels 200 cm in the first 2 s and 220 cm in the next 5 s. Calculate the velocity at the end of the seventh second from the start

What property of plane mirrors is used in periscope

What is the pressure on a swimmer 20 m below the surface of water?

Question 148In rhombus BEAM, find ∠AME and ∠AEM.

Two spheres made of same substance have diameters in the ratio 1:2. Their thermal capacities are in theratio of(1) 1:2(2) 1: 8(3) 1:4(4) 2 :1

Define kinetic energy. Write the equation for kinetic energy. Two bodies of equal masses move with uniform velocities v and 3v respectively. Find the ratio of their kinetic energies. [5 MARKS]

Regulating body temperature is related to

800 gram of ice at minus 15 degree celsius is mixed with 100 gram of water at 440 degree Celsius calculate the final temperature of the mixture when equilibrium is attend

what is a gas?

A telescope is used to view the moon. What is the angle subtended by the moon at the telescope, if the focal length of objective lens of the telescope is 12 cm and the size of the image of the moon formed by the objective is 2 cm ?

Which of the following are unit(s) of distance?

a particle moves from position (2,3,1)to position (3,2,1) in the action of F=1+2x.The value of work done by the force is

A 50 KG block is kept on the rough horizontal surface and coefficient of limiting friction between surface and block is 0.1 Find the frictional force acting on block if a horizontal force of 15 N begins to act on the block (g=10m/s^2) (A)50 N (B) 20 N (C) 25 N (D 15 N

7.The position vector of a particle is determined by the expression r=3tsquarei+4tsquarej+7k .The displacement traversed in first 10 second is : A. 100m B. 150m C. 300m D. 500m Click here to view details:

A battery if internal resistance 4 Ω is connected to the network of resistances as shown. What must be the value of R so that maximum power is delivered to the network?

The electric feild at a point due to a point charge is 30N/C and the electric potential at that point is 15J/C.Calculate the distance of the point from the charge and the magnitude of the charge.

Name two devices in which an electric cell is used. [1 MARK]

Question 3 (b)Give reason for the following observations.b. We can get the smell of perfume sitting several metres away.

126.Eight drops of Mercury each of equal radii and possessing equal charge combine to form a bigger drop.the capacitance of bigger drop as compared to each small drop is?

If green leaves are seen in red light, they will appear

Why do electric generats when we rub two metals

Why do people make use of sliding friction in skiying and in sledeges?

16. If the dimensions of length and force are increased 4 times how many times will the dimensions of energy increase ?

wind blowing from south at 10m/s but to a cyclist it appears to be blowing from the east at 10m/s the cyclist has a velocity(take east as i cap)

36 kmhr= ___ ms

An electric current is said to be flowing through a wire when:

How is tornado different from cyclone ?