6277 + Interview Questions in Physics Page 59 InterviewSolution

2901.	four charges are placed at corners of square having side 10 cm if q is 1 "mu"c then what will be the electric field at centre of square step by step
Answer» four charges are placed at corners of square having side 10 cm if q is 1 "mu"c then what will be the electric field at centre of square step by step

Discussion

2902.	A particle moves along straight line for 10sec with uniform acceleration a =2 then for next 10sec moves with acceleration a =4 what is its total displacement
Answer» A particle moves along straight line for 10sec with uniform acceleration a =2 then for next 10sec moves with acceleration a =4 what is its total displacement

Discussion

2903.	In which of the cases in physics we can apply the formula work done= change in kinetic energy and work energy theorm?
Answer» In which of the cases in physics we can apply the formula work done= change in kinetic energy and work energy theorm?

Discussion

2904.	What happens to the shape of a thin hot tin can if it is closed and cold water is poured on it?
Answer» What happens to the shape of a thin hot tin can if it is closed and cold water is poured on it?

Discussion

2905.	ntA simple pendulum of a certain clock has time period 2.04sec. How fast or slow does the clock run during 12 hours?n nt1) 11.4 min slown nt2) 12.4 min slown nt3) 14.4 min slown nt4) 15.2 min slown
Answer» ntA simple pendulum of a certain clock has time period 2.04sec. How fast or slow does the clock run during 12 hours?n nt1) 11.4 min slown nt2) 12.4 min slown nt3) 14.4 min slown nt4) 15.2 min slown

Discussion

2906.	Which of these are better absorbers of radiant heat–dark-coloured or light-coloured objects?
Answer» Which of these are better absorbers of radiant heat–dark-coloured or light-coloured objects?

Discussion

2907.	the enthalpy of vapourisation of liquid is 40 kJ/mol and entropy of vapoursation is 64 kJ mol^{-1} K^{-1 }.the boiling point of liquid is 1) 625^° C 2) 352^° C 3) 400^° C 4) 254^° C
Answer» the enthalpy of vapourisation of liquid is 40 kJ/mol and entropy of vapoursation is 64 kJ mol^{-1} K^{-1 }.the boiling point of liquid is 1) 625^° C 2) 352^° C 3) 400^° C 4) 254^° C

Discussion

2908.	If a ball of mass 1 kg is falling from a height 10 m what will be the kinetic energy of the ball when it hits the ground?( take g = 10 m/s2) neglect air drag?
Answer» If a ball of mass 1 kg is falling from a height 10 m what will be the kinetic energy of the ball when it hits the ground?( take g = 10 m/s2) neglect air drag?

Discussion

2909.	17.A uniform thin constantan wire of ressistance R is bent like acircle. P&Q r two points on the wire such that the arc PQ subtends an angle 'THETA' at the centre. Effective resistance b/w P&Q is
Answer» 17.A uniform thin constantan wire of ressistance R is bent like acircle. P&Q r two points on the wire such that the arc PQ subtends an angle 'THETA' at the centre. Effective resistance b/w P&Q is

Discussion

2910.	What is meant by lateral inversion? Explain it with the help of a diagram.
Answer» What is meant by lateral inversion? Explain it with the help of a diagram.

Discussion

2911.	Question 3Why does an object float or sink when placed on the surface of water?
Answer» Question 3 Why does an object float or sink when placed on the surface of water?

Discussion

2912.	Question 10 A capsule of medicine is in the shape of a sphere of diameter 3.5 mm. How much medicine in mm3 is needed to fill this capsule? [Assume π=227]
Answer» Question 10 A capsule of medicine is in the shape of a sphere of diameter 3.5 mm. How much medicine $i n m m^{3}$ is needed to fill this capsule? $[A s s u m e π = \frac{22}{7}]$

Discussion

2913.	Thermal expansion is the tendency of objects to change ___.
Answer» Thermal expansion is the tendency of objects to change ___.

Discussion

2914.	Statement 1: Dams are constructed to produce hydro electricity. Statement 2: Dam obstruct the flow of water and water level rises thereby increasing the potential energy which is further converted to kinetic and then to electric energy.
Answer» Statement 1: Dams are constructed to produce hydro electricity. Statement 2: Dam obstruct the flow of water and water level rises thereby increasing the potential energy which is further converted to kinetic and then to electric energy.

Discussion

2915.	What is centre of curvature?
Answer» What is centre of curvature?

Discussion

2916.	Why doesn't lightning occur on a bright sunny day?
Answer» Why doesn't lightning occur on a bright sunny day?

Discussion

2917.	An aluminium bar of 8 m length and a steel bar of 5 mm longer in length are kept at 30∘C. If the ambient temperature is raised gradually, at what temperature the aluminium bar coil elongate 5 mm longer than steel bar (the linear expansion coefficients for steel and aluminium are 12×10−6∘/C and 23×10−6∘/C respectively ) .
Answer» An aluminium bar of 8 m length and a steel bar of 5 mm longer in length are kept at $30^{\circ} C$ . If the ambient temperature is raised gradually, at what temperature the aluminium bar coil elongate 5 mm longer than steel bar (the linear expansion coefficients for steel and aluminium are $12 \times 10^{- 6} \circ / C a n d 23 \times 10^{- 6} \circ / C$ respectively ) .

Discussion

2918.	If kinetic energy of a gas molecule at 1atm pressure and 300 K is x KJ the kinetic energy of a gas molecule at 2 atm pressure and same temperature would be
Answer» If kinetic energy of a gas molecule at 1atm pressure and 300 K is x KJ the kinetic energy of a gas molecule at 2 atm pressure and same temperature would be

Discussion

2919.	What is one wavelength? The length of one wave or the dis†an ce between two consecutive troughs
Answer» What is one wavelength? The length of one wave or the dis†an ce between two consecutive troughs

Discussion

2920.	Milk has a density of 1.03 g/ml at 25∘C and 1 atm pressure. Calculate the mass of 1 l of milk.
Answer» Milk has a density of $1.03 g / m l$ at $25^{\circ} C$ and 1 atm pressure. Calculate the mass of $1 l$ of milk.

Discussion

2921.	6. A uniform disc of mass M radius R, is resting on a table on its rim. The coefficient of friction between disc and table is mew. Now the disc is pulled elwith a force F as shown in the figure. What is the maximum value of F for which the disc rolls without slipping
Answer» 6. A uniform disc of mass M radius R, is resting on a table on its rim. The coefficient of friction between disc and table is mew. Now the disc is pulled elwith a force F as shown in the figure. What is the maximum value of F for which the disc rolls without slipping

Discussion

2922.	If a rod moved in magnetic field then current will be produced in it or not
Answer» If a rod moved in magnetic field then current will be produced in it or not

Discussion

2923.	A wire placed along NS direction carries a current of 8 A from south to north. The magnetic field due to 10 cm piece of wire at a point 250 cm north east from the piece is
Answer» A wire placed along NS direction carries a current of 8 A from south to north. The magnetic field due to 10 cm piece of wire at a point 250 cm north east from the piece is

Discussion

2924.	Question 19What is the role of a plane mirror and a glass sheet in a solar cooker?
Answer» Question 19 What is the role of a plane mirror and a glass sheet in a solar cooker?

Discussion

2925.	With the help of a distance-time graph, find out whether the motion by the object is uniform motion or non-uniform motion.
Answer» With the help of a distance-time graph, find out whether the motion by the object is uniform motion or non-uniform motion.

Discussion

2926.	51.A car moving along a straight line with a speed of 126km/hr is brought to stop within a distance of 200m.What is the retardation of the car(assume that the retardation is uniform) and show how long does it take for the car to stop?
Answer» 51.A car moving along a straight line with a speed of 126km/hr is brought to stop within a distance of 200m.What is the retardation of the car(assume that the retardation is uniform) and show how long does it take for the car to stop?

Discussion

2927.	State the properties of electric charge.
Answer» State the properties of electric charge.

Discussion

2928.	A conductor has 14.4×10^{-19 }C positive charge. The conductor has (charge on electron = 1.6×10^{-19}C) (1) 9 electron in excess (2) 27 electron in short. (3) 27 electron in excess (4) 9 electron in short .
Answer» A conductor has 14.4×10^{-19 }C positive charge. The conductor has (charge on electron = 1.6×10^{-19}C) (1) 9 electron in excess (2) 27 electron in short. (3) 27 electron in excess (4) 9 electron in short .

Discussion

2929.	43. A cone and a cylinder having same base area and height are placed on a horizontal surface . What is the ratio of the height of centre of gravity of the cone and the cylinder from the surface?
Answer» 43. A cone and a cylinder having same base area and height are placed on a horizontal surface . What is the ratio of the height of centre of gravity of the cone and the cylinder from the surface?

Discussion

2930.	how to calculate no. of images formed by two mirrors inclied at some angle
Answer» how to calculate no. of images formed by two mirrors inclied at some angle

Discussion

2931.	Calculate the distance travelled by the object at a speed of 15 ms−1 for 2 seconds.
Answer» Calculate the distance travelled by the object at a speed of 15 $m s^{- 1}$ for $2$ seconds.

Discussion

2932.	Why there is no charge in Gaussian surface when r
Answer» Why there is no charge in Gaussian surface when r

Discussion

2933.	Which of the following is/are properties of a wave?
Answer» Which of the following is/are properties of a wave?

Discussion

2934.	Determine the number of seconds there in a day.
Answer» Determine the number of seconds there in a day.

Discussion

2935.	Write two different vectors having same direction.
Answer» Write two different vectors having same direction.

Discussion

2936.	19. Explain :- A square lead slab of side 50cm and thickness 10cm is subject to a shearing force(on its narrow face) of 90000N.the lower edge is riveted to the floor.how much will the upper edge be displaced?
Answer» 19. Explain :- A square lead slab of side 50cm and thickness 10cm is subject to a shearing force(on its narrow face) of 90000N.the lower edge is riveted to the floor.how much will the upper edge be displaced?

Discussion

2937.	70.A cylindrical wire of resistance 100 ohm is stretched so that its length increases by 2 percent.the new resistance of d wire will b?
Answer» 70.A cylindrical wire of resistance 100 ohm is stretched so that its length increases by 2 percent.the new resistance of d wire will b?

Discussion

2938.	A block of wood measuring 5 m long, 4 m wide and 0.5 m thick is placed on a table such that its face with the maximum area is in contact with the table surface. Find the pressure exerted on the table due to the block if the mass of the block is 4000 kg.
Answer» A block of wood measuring $5 m$ long, $4 m$ wide and $0.5 m$ thick is placed on a table such that its face with the maximum area is in contact with the table surface. Find the pressure exerted on the table due to the block if the mass of the block is $4000 kg$ .

Discussion

2939.	Suppose gravity of earth suddenly becomes zero, then in which direction will the moon begin to move if no other celestial body affects it?
Answer» Suppose gravity of earth suddenly becomes zero, then in which direction will the moon begin to move if no other celestial body affects it?

Discussion

2940.	find the number of coulombs required to evolve 5.6 litre of O_2 gas at stp
Answer» find the number of coulombs required to evolve 5.6 litre of O_2 gas at stp

Discussion

2941.	Pair the cards with images that are symmetrical to each other.
Answer» Pair the cards with images that are symmetrical to each other.

Discussion

2942.	The frequency of a sound wave is 20Hz. What will be its time period ?
Answer» The frequency of a sound wave is 20Hz. What will be its time period ?

Discussion

2943.	what is rolling friction and angle of repose?
Answer» what is rolling friction and angle of repose?

Discussion

2944.	An object A is in rectilinear motion and an object B is in curvilinear motion. Which of these is in translatory motion? Give reasons.
Answer» An object A is in rectilinear motion and an object B is in curvilinear motion. Which of these is in translatory motion? Give reasons.

Discussion

2945.	a moter vehicle travelled the first third of a distance s at a speed of v1=10kmph, the second third at a speed of v2= 20 kmps and the last third at a speed of v3=60kmph.determine the mean speed of the vehicle over the entire distances.
Answer» a moter vehicle travelled the first third of a distance s at a speed of v1=10kmph, the second third at a speed of v2= 20 kmps and the last third at a speed of v3=60kmph.determine the mean speed of the vehicle over the entire distances.

Discussion

2946.	A body moving along streight line covers a distance in three equal parts with speed 2m/s,3m/s,4m/s,then its avarage speed is(a)12(b)13/12(c)36/13(d)12/13
Answer» A body moving along streight line covers a distance in three equal parts with speed 2m/s,3m/s,4m/s,then its avarage speed is (a)12 (b)13/12 (c)36/13 (d)12/13

Discussion

2947.	a particle has a vel u towards east at t=0 . its acc is towards west & is cons†an t . Let xa & xB be the magnitude of displacements in the 1st 10 sec & the next 10 sec a. xa xb d. the information is insufficient to decide the relation of xa with x
Answer» a particle has a vel u towards east at t=0 . its acc is towards west & is cons†an t . Let xa & xB be the magnitude of displacements in the 1st 10 sec & the next 10 sec a. xa xb d. the information is insufficient to decide the relation of xa with x

Discussion

2948.	In which of the following case(s) can we say that the object is moving?
Answer» In which of the following case(s) can we say that the object is moving?

Discussion

2949.	y=4+2 sin (6t-3x); calculate the amplitude of the given equation of wave motion.
Answer» y=4+2 sin (6t-3x); calculate the amplitude of the given equation of wave motion.

Discussion

2950.	Two infinitely long charged rod having same charge per unit length of a 3×10^(-8) C/cm are 2cm apart. Calculate the electric force per unit length om each rod, and work done in bringing them closer by 1 cm.
Answer» Two infinitely long charged rod having same charge per unit length of a 3×10^(-8) C/cm are 2cm apart. Calculate the electric force per unit length om each rod, and work done in bringing them closer by 1 cm.

Discussion

Explore topic-wise InterviewSolutions in .

four charges are placed at corners of square having side 10 cm if q is 1 "mu"c then what will be the electric field at centre of square step by step

A particle moves along straight line for 10sec with uniform acceleration a =2 then for next 10sec moves with acceleration a =4 what is its total displacement

In which of the cases in physics we can apply the formula work done= change in kinetic energy and work energy theorm?

What happens to the shape of a thin hot tin can if it is closed and cold water is poured on it?

ntA simple pendulum of a certain clock has time period 2.04sec. How fast or slow does the clock run during 12 hours?n nt1) 11.4 min slown nt2) 12.4 min slown nt3) 14.4 min slown nt4) 15.2 min slown

Which of these are better absorbers of radiant heat–dark-coloured or light-coloured objects?

the enthalpy of vapourisation of liquid is 40 kJ/mol and entropy of vapoursation is 64 kJ mol^{-1} K^{-1 }.the boiling point of liquid is 1) 625^° C 2) 352^° C 3) 400^° C 4) 254^° C

If a ball of mass 1 kg is falling from a height 10 m what will be the kinetic energy of the ball when it hits the ground?( take g = 10 m/s2) neglect air drag?

17.A uniform thin constantan wire of ressistance R is bent like acircle. P&Q r two points on the wire such that the arc PQ subtends an angle 'THETA' at the centre. Effective resistance b/w P&Q is

What is meant by lateral inversion? Explain it with the help of a diagram.

Question 3Why does an object float or sink when placed on the surface of water?

Question 10 A capsule of medicine is in the shape of a sphere of diameter 3.5 mm. How much medicine in mm3 is needed to fill this capsule? [Assume π=227]

Thermal expansion is the tendency of objects to change ___.

Statement 1: Dams are constructed to produce hydro electricity. Statement 2: Dam obstruct the flow of water and water level rises thereby increasing the potential energy which is further converted to kinetic and then to electric energy.

What is centre of curvature?

Why doesn't lightning occur on a bright sunny day?

If kinetic energy of a gas molecule at 1atm pressure and 300 K is x KJ the kinetic energy of a gas molecule at 2 atm pressure and same temperature would be

What is one wavelength? The length of one wave or the dis†an ce between two consecutive troughs

Milk has a density of 1.03 g/ml at 25∘C and 1 atm pressure. Calculate the mass of 1 l of milk.

6. A uniform disc of mass M radius R, is resting on a table on its rim. The coefficient of friction between disc and table is mew. Now the disc is pulled elwith a force F as shown in the figure. What is the maximum value of F for which the disc rolls without slipping

If a rod moved in magnetic field then current will be produced in it or not

A wire placed along NS direction carries a current of 8 A from south to north. The magnetic field due to 10 cm piece of wire at a point 250 cm north east from the piece is

Question 19What is the role of a plane mirror and a glass sheet in a solar cooker?

With the help of a distance-time graph, find out whether the motion by the object is uniform motion or non-uniform motion.

51.A car moving along a straight line with a speed of 126km/hr is brought to stop within a distance of 200m.What is the retardation of the car(assume that the retardation is uniform) and show how long does it take for the car to stop?

State the properties of electric charge.

A conductor has 14.4×10^{-19 }C positive charge. The conductor has (charge on electron = 1.6×10^{-19}C) (1) 9 electron in excess (2) 27 electron in short. (3) 27 electron in excess (4) 9 electron in short .

43. A cone and a cylinder having same base area and height are placed on a horizontal surface . What is the ratio of the height of centre of gravity of the cone and the cylinder from the surface?

how to calculate no. of images formed by two mirrors inclied at some angle

Calculate the distance travelled by the object at a speed of 15 ms−1 for 2 seconds.

Why there is no charge in Gaussian surface when r

Which of the following is/are properties of a wave?

Determine the number of seconds there in a day.

Write two different vectors having same direction.

19. Explain :- A square lead slab of side 50cm and thickness 10cm is subject to a shearing force(on its narrow face) of 90000N.the lower edge is riveted to the floor.how much will the upper edge be displaced?

70.A cylindrical wire of resistance 100 ohm is stretched so that its length increases by 2 percent.the new resistance of d wire will b?

A block of wood measuring 5 m long, 4 m wide and 0.5 m thick is placed on a table such that its face with the maximum area is in contact with the table surface. Find the pressure exerted on the table due to the block if the mass of the block is 4000 kg.

Suppose gravity of earth suddenly becomes zero, then in which direction will the moon begin to move if no other celestial body affects it?

find the number of coulombs required to evolve 5.6 litre of O_2 gas at stp

Pair the cards with images that are symmetrical to each other.

The frequency of a sound wave is 20Hz. What will be its time period ?

what is rolling friction and angle of repose?

An object A is in rectilinear motion and an object B is in curvilinear motion. Which of these is in translatory motion? Give reasons.

a moter vehicle travelled the first third of a distance s at a speed of v1=10kmph, the second third at a speed of v2= 20 kmps and the last third at a speed of v3=60kmph.determine the mean speed of the vehicle over the entire distances.

A body moving along streight line covers a distance in three equal parts with speed 2m/s,3m/s,4m/s,then its avarage speed is(a)12(b)13/12(c)36/13(d)12/13

a particle has a vel u towards east at t=0 . its acc is towards west & is cons†an t . Let xa & xB be the magnitude of displacements in the 1st 10 sec & the next 10 sec a. xa xb d. the information is insufficient to decide the relation of xa with x

In which of the following case(s) can we say that the object is moving?

y=4+2 sin (6t-3x); calculate the amplitude of the given equation of wave motion.

Two infinitely long charged rod having same charge per unit length of a 3×10^(-8) C/cm are 2cm apart. Calculate the electric force per unit length om each rod, and work done in bringing them closer by 1 cm.