9478 + Interview Questions in Physics Page 60 InterviewSolution

2951.	Identify the common component used in these following appliances.
Answer» Identify the common component used in these following appliances.

Discussion

2952.	47.for a black body at temperature 727 degree centigrade , its rate of energy loss is 20 watt and temperature of surrounding is 277 degree centigrade. if temperature of black body is changed to 1227 degree centigrade then its rate of energy loss will be
Answer» 47.for a black body at temperature 727 degree centigrade , its rate of energy loss is 20 watt and temperature of surrounding is 277 degree centigrade. if temperature of black body is changed to 1227 degree centigrade then its rate of energy loss will be

Discussion

2953.	Why do ink pens start leaking at high altitudes?
Answer» Why do ink pens start leaking at high altitudes?

Discussion

2954.	Why is a magnetic needle used in the tester made to test mostly weak conductors? [3 MARKS]
Answer» Why is a magnetic needle used in the tester made to test mostly weak conductors? [3 MARKS]

2954.

Why is a magnetic needle used in the tester made to test mostly weak conductors? [3 MARKS]

Answer»

Why is a magnetic needle used in the tester made to test mostly weak conductors? [3 MARKS]

Discussion

2955.	Is all positive charged are metal . if not why?
Answer» Is all positive charged are metal . if not why?

Discussion

2956.	Question 10 (v) State whether the following statement is ‘True’ or ‘False’ The planet Venus appears in the eastern sky before sunrise.
Answer» Question 10 (v) State whether the following statement is ‘True’ or ‘False’ The planet Venus appears in the eastern sky before sunrise.

Discussion

2957.	The angle of reflection for a ray incident at an angle of 40∘ with the normal is __.
Answer» The angle of reflection for a ray incident at an angle of $40^{\circ}$ with the normal is __.

Discussion

2958.	A highly concentrated solution of Potassium Sulphate in water is electrolysed using inert electrodes .The products at the cathode and anode are respectively.
Answer» A highly concentrated solution of Potassium Sulphate in water is electrolysed using inert electrodes .The products at the cathode and anode are respectively.

Discussion

2959.	Does air exert friction on an object moving through it?
Answer» Does air exert friction on an object moving through it?

Discussion

2960.	Identify the given images and give a suitable title.
Answer» Identify the given images and give a suitable title.

Discussion

2961.	The height of an isotropic metal cylinder, contracts by 1.5%. The radius and the curved surface areawill changes respectively by
Answer» The height of an isotropic metal cylinder, contracts by 1.5%. The radius and the curved surface areawill changes respectively by

Discussion

2962.	3. how many electron would it take to makeup a charge of minus one Millionth of a columb
Answer» 3. how many electron would it take to makeup a charge of minus one Millionth of a columb

Discussion

2963.	A Heavy uniform chain lies on a horizontal table top. If the coefficient of friction between the chain and the table surface is 0.25 then the fraction of the length of chain that can hang over one edge of the table is??
Answer» A Heavy uniform chain lies on a horizontal table top. If the coefficient of friction between the chain and the table surface is 0.25 then the fraction of the length of chain that can hang over one edge of the table is??

Discussion

2964.	Name the phenomenon responsible for the following effect : When we sit in front of a plane mirror and write with our right hand,it appears in the mirror that we are writing with the left hand.
Answer» Name the phenomenon responsible for the following effect : When we sit in front of a plane mirror and write with our right hand,it appears in the mirror that we are writing with the left hand.

2964.

Name the phenomenon responsible for the following effect : When we sit in front of a plane mirror and write with our right hand,it appears in the mirror that we are writing with the left hand.

Answer»

Name the phenomenon responsible for the following effect :

When we sit in front of a plane mirror and write with our right hand,it appears in the mirror that we are writing with the left hand.

Discussion

2965.	What is earthing? Why is it important to provide an earthing connection to a lightning conductor?
Answer» What is earthing? Why is it important to provide an earthing connection to a lightning conductor?

Discussion

2966.	18.The minimum no of nand gates used to construct an OR gate is
Answer» 18.The minimum no of nand gates used to construct an OR gate is

Discussion

2967.	Why is earthing required?
Answer» Why is earthing required?

Discussion

2968.	9.The two ends of a 2 m long rod is tied with two different material wires( Steel And braas). The cross section of the brass wire is 210 to the power -5 and the steel wire is 110 to the power -5 squire meter. In which place of the rod a weight is hanged, so that 1. The stress in these two wires are same? 2. The starin in these wires are same? The Y of brass-1010 to the power 10 N per meter squire Y of steel-2010 to the power 10N per meter squire
Answer» 9.The two ends of a 2 m long rod is tied with two different material wires( Steel And braas). The cross section of the brass wire is 210 to the power -5 and the steel wire is 110 to the power -5 squire meter. In which place of the rod a weight is hanged, so that 1. The stress in these two wires are same? 2. The starin in these wires are same? The Y of brass-1010 to the power 10 N per meter squire Y of steel-2010 to the power 10N per meter squire

Discussion

2969.	The correct position of the eye is very important for taking measurements. There might be an error in the reading if our eye is not completely in front of the ruler mark. What is the name of this error?
Answer» The correct position of the eye is very important for taking measurements. There might be an error in the reading if our eye is not completely in front of the ruler mark. What is the name of this error?

Discussion

2970.	What do you mean by the refractive index of a medium?
Answer» What do you mean by the refractive index of a medium?

Discussion

2971.	Question 3 (a)State whether the following statement is true or false.(a) Sound cannot travel in vacuum.
Answer» Question 3 (a) State whether the following statement is true or false. (a) Sound cannot travel in vacuum.

Discussion

2972.	What are the Mks, cgs, fps units of work and power ?
Answer» What are the Mks, cgs, fps units of work and power ?

Discussion

2973.	what are semi conductors
Answer» what are semi conductors

Discussion

2974.	modern day generators produce electric power as high as 500MW . how many 100 watt bulb can one lit with this generator
Answer» modern day generators produce electric power as high as 500MW . how many 100 watt bulb can one lit with this generator

Discussion

2975.	What is magnitude of force?
Answer» What is magnitude of force?

Discussion

2976.	Five equal resistance each of resistance R are conneted a shown in figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be[1 Mark]
Answer» Five equal resistance each of resistance $R$ are conneted a shown in figure. A battery of $V$ volts is connected between $A$ and $B$ . The current flowing in $A F C E B$ will be $[$ 1 Mark $]$

Discussion

2977.	What would have happen on earth if jupiter was as close as mars?
Answer» What would have happen on earth if jupiter was as close as mars?

Discussion

2978.	34.: A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 hours. The mean terminal voltage during 34.discharge is 14 V. The Watt hour efficiency of the battery is : A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 hours. The mean terminal voltage during discharge is 14 V. The Watt hour efficiency of the battery is
Answer» 34.: A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 hours. The mean terminal voltage during 34.discharge is 14 V. The Watt hour efficiency of the battery is : A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 hours. The mean terminal voltage during discharge is 14 V. The Watt hour efficiency of the battery is

Discussion

2979.	In the above experiment, what will you observe if the poles were interchanged?
Answer» In the above experiment, what will you observe if the poles were interchanged?

Discussion

2980.	Why is light from the moon called cool light while light from the sun called hot light?
Answer» Why is light from the moon called cool light while light from the sun called hot light?

Discussion

2981.	Define groundwater. What is the source of groundwater recharge?
Answer» Define groundwater. What is the source of groundwater recharge?

Discussion

2982.	Nichrome wire of resistivity w is stretched to make 10 percent longer.What is the percentage change in its resis†an ce
Answer» Nichrome wire of resistivity w is stretched to make 10 percent longer.What is the percentage change in its resis†an ce

Discussion

2983.	A liquid takes 5 minutes to cool from 800 C to 500 C . How much time will it take to cool from 600 C to 300 C ? The temperature of the surrounding is 200 C .
Answer» A liquid takes 5 minutes to cool from $80^{0} C t o 50^{0} C$ . How much time will it take to cool from $60^{0} C t o 30^{0} C$ ? The temperature of the surrounding is $20^{0}$ C .

Discussion

2984.	Which of the following characteristics don't change during translation?
Answer» Which of the following characteristics don't change during translation?

Discussion

2985.	Why light travels faster than sound?
Answer» Why light travels faster than sound?

Discussion

2986.	Moon is a satellite of the earth. It is observed from 2 points having distance 1.276×10^7m. The angular parallex is found to be 1.9 degree. Find the distance of moon from the earth
Answer» Moon is a satellite of the earth. It is observed from 2 points having distance 1.276×10^7m. The angular parallex is found to be 1.9 degree. Find the distance of moon from the earth

Discussion

2987.	90.Establish a relation between angular momentum, moment of inertia, and angular velocity.
Answer» 90.Establish a relation between angular momentum, moment of inertia, and angular velocity.

Discussion

2988.	For the beam shown belowM0 is the applied moment at mid span, slope of the beam at end A is
Answer» For the beam shown below $M_{0}$ is the applied moment at mid span, slope of the beam at end $A$ is

Discussion

2989.	Which medium has the highest optical density?
Answer» Which medium has the highest optical density?

Discussion

2990.	A thin copper wire of length L increases in length by 1% when heated from 00 C to 1000 C. If then a copper plate of area 2L × L is heated from 00 C to 1000 C, the percentage increase in its area will be
Answer» A thin copper wire of length L increases in length by 1% when heated from $0^{0}$ C to $100^{0}$ C. If then a copper plate of area 2L × L is heated from $0^{0}$ C to $100^{0}$ C, the percentage increase in its area will be

Discussion

2991.	ten cells each of emf 1V and internal resis†an ce 1 ohm are connected in series . in this arrangement polarity of two cells is reversed and the system is connected to an external resis†an ce of 2ohm . find the current in the circui
Answer» ten cells each of emf 1V and internal resis†an ce 1 ohm are connected in series . in this arrangement polarity of two cells is reversed and the system is connected to an external resis†an ce of 2ohm . find the current in the circui

Discussion

2992.	A block of mass 1kg is moving along x axis .A force of 1N acts on the block.The force F always points towards the origin O.The magnitude of F is constant except at point O,where it is 0.At t=0 the block is released from rest at x=2m.What is the period of motion of the block?
Answer» A block of mass 1kg is moving along x axis .A force of 1N acts on the block.The force F always points towards the origin O.The magnitude of F is constant except at point O,where it is 0.At t=0 the block is released from rest at x=2m.What is the period of motion of the block?

Discussion

2993.	Name the scientist who developed the theory of gravity after observing an apple falling from a tree.
Answer» Name the scientist who developed the theory of gravity after observing an apple falling from a tree.

Discussion

2994.	Which of the following can be classified as a contact force?
Answer» Which of the following can be classified as a contact force?

Discussion

2995.	A steel scale measures the length of a copper wire as 80.0 cm, when both are at 20∘C (the calibration temperature for scale). What would be the scale reading for the length of wire, when both are at 40∘C?(Given αsteel=11×10−6 per ∘C and αcopper=17×10−6 per ∘C)
Answer» A steel scale measures the length of a copper wire as $80.0 cm$ , when both are at $20^{\circ} C$ (the calibration temperature for scale). What would be the scale reading for the length of wire, when both are at $40^{\circ} C$ ? (Given $α_{steel} = 11 \times 10^{- 6}$ per $^{\circ} C$ and $α_{copper} = 17 \times 10^{- 6}$ per $^{\circ} C)$

Discussion

2996.	Why electric field intensity is called vectorial strength
Answer» Why electric field intensity is called vectorial strength

Discussion

2997.	A loader applied 150 N of force to lift a stone and 1250 J of work was done by it. How far was the rock lifted during the application of force?
Answer» A loader applied $150 N$ of force to lift a stone and $1250 J$ of work was done by it. How far was the rock lifted during the application of force?

Discussion

2998.	A spring balance reads 200gF when carrying a lump of lead in air. If the lead isnow immersed with half of its volume in brine solution, what will be the new reading of the spring balance? Specific gravity of lead and brine are 11.4 and 1.1 respectively.
Answer» A spring balance reads 200gF when carrying a lump of lead in air. If the lead isnow immersed with half of its volume in brine solution, what will be the new reading of the spring balance? Specific gravity of lead and brine are 11.4 and 1.1 respectively.

Discussion

2999.	Question 5 (a)Pole star is a member of the solar system. T/F
Answer» Question 5 (a) Pole star is a member of the solar system. T/F

2999.

Question 5 (a)Pole star is a member of the solar system. T/F

Answer»

Question 5 (a)

Pole star is a member of the solar system. T/F

Discussion

3000.	50 waves pass through a point in 0.1 second. If the dis†an ce between a crest and the adjacent trough of the wave is 0.34m, calculate the frequency, the wavelength and wave velocity50 waves pass through a point in 0.1 second. If the dis†an ce between a crest and the adjacent trough of the wave is 0.34m, calculate the frequency, the wavelength a nd wave velocity
Answer» 50 waves pass through a point in 0.1 second. If the dis†an ce between a crest and the adjacent trough of the wave is 0.34m, calculate the frequency, the wavelength and wave velocity50 waves pass through a point in 0.1 second. If the dis†an ce between a crest and the adjacent trough of the wave is 0.34m, calculate the frequency, the wavelength a nd wave velocity

Discussion

Explore topic-wise InterviewSolutions in .

Identify the common component used in these following appliances.

47.for a black body at temperature 727 degree centigrade , its rate of energy loss is 20 watt and temperature of surrounding is 277 degree centigrade. if temperature of black body is changed to 1227 degree centigrade then its rate of energy loss will be

Why do ink pens start leaking at high altitudes?

Why is a magnetic needle used in the tester made to test mostly weak conductors? [3 MARKS]

Is all positive charged are metal . if not why?

Question 10 (v) State whether the following statement is ‘True’ or ‘False’ The planet Venus appears in the eastern sky before sunrise.

The angle of reflection for a ray incident at an angle of 40∘ with the normal is __.

A highly concentrated solution of Potassium Sulphate in water is electrolysed using inert electrodes .The products at the cathode and anode are respectively.

Does air exert friction on an object moving through it?

Identify the given images and give a suitable title.

The height of an isotropic metal cylinder, contracts by 1.5%. The radius and the curved surface areawill changes respectively by

3. how many electron would it take to makeup a charge of minus one Millionth of a columb

A Heavy uniform chain lies on a horizontal table top. If the coefficient of friction between the chain and the table surface is 0.25 then the fraction of the length of chain that can hang over one edge of the table is??

Name the phenomenon responsible for the following effect : When we sit in front of a plane mirror and write with our right hand,it appears in the mirror that we are writing with the left hand.

What is earthing? Why is it important to provide an earthing connection to a lightning conductor?

18.The minimum no of nand gates used to construct an OR gate is

Why is earthing required?

The correct position of the eye is very important for taking measurements. There might be an error in the reading if our eye is not completely in front of the ruler mark. What is the name of this error?

What do you mean by the refractive index of a medium?

Question 3 (a)State whether the following statement is true or false.(a) Sound cannot travel in vacuum.

What are the Mks, cgs, fps units of work and power ?

what are semi conductors

modern day generators produce electric power as high as 500MW . how many 100 watt bulb can one lit with this generator

What is magnitude of force?

Five equal resistance each of resistance R are conneted a shown in figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be​​​​​​​[1 Mark]

What would have happen on earth if jupiter was as close as mars?

In the above experiment, what will you observe if the poles were interchanged?

Why is light from the moon called cool light while light from the sun called hot light?

Define groundwater. What is the source of groundwater recharge?

Nichrome wire of resistivity w is stretched to make 10 percent longer.What is the percentage change in its resis†an ce

A liquid takes 5 minutes to cool from 800 C to 500 C . How much time will it take to cool from 600 C to 300 C ? The temperature of the surrounding is 200 C .

Which of the following characteristics don't change during translation?

Why light travels faster than sound?

Moon is a satellite of the earth. It is observed from 2 points having distance 1.276×10^7m. The angular parallex is found to be 1.9 degree. Find the distance of moon from the earth

90.Establish a relation between angular momentum, moment of inertia, and angular velocity.

For the beam shown belowM0 is the applied moment at mid span, slope of the beam at end A is

Which medium has the highest optical density?

A thin copper wire of length L increases in length by 1% when heated from 00 C to 1000 C. If then a copper plate of area 2L × L is heated from 00 C to 1000 C, the percentage increase in its area will be

ten cells each of emf 1V and internal resis†an ce 1 ohm are connected in series . in this arrangement polarity of two cells is reversed and the system is connected to an external resis†an ce of 2ohm . find the current in the circui

A block of mass 1kg is moving along x axis .A force of 1N acts on the block.The force F always points towards the origin O.The magnitude of F is constant except at point O,where it is 0.At t=0 the block is released from rest at x=2m.What is the period of motion of the block?

Name the scientist who developed the theory of gravity after observing an apple falling from a tree.

Which of the following can be classified as a contact force?

A steel scale measures the length of a copper wire as 80.0 cm, when both are at 20∘C (the calibration temperature for scale). What would be the scale reading for the length of wire, when both are at 40∘C?(Given αsteel=11×10−6 per ∘C and αcopper=17×10−6 per ∘C)

Why electric field intensity is called vectorial strength

A loader applied 150 N of force to lift a stone and 1250 J of work was done by it. How far was the rock lifted during the application of force?

A spring balance reads 200gF when carrying a lump of lead in air. If the lead isnow immersed with half of its volume in brine solution, what will be the new reading of the spring balance? Specific gravity of lead and brine are 11.4 and 1.1 respectively.

Question 5 (a)Pole star is a member of the solar system. T/F

Five equal resistance each of resistance R are conneted a shown in figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be[1 Mark]