9478 + Interview Questions in Physics Page 91 InterviewSolution

4501.	A match box measures 4 cm×2.5 cm×1.5 cm. Volume of a packet containing 12 such boxes (no space is left in the packet) is ____________.
Answer» A match box measures $4 cm \times 2.5 cm \times 1.5 cm .$ Volume of a packet containing 12 such boxes (no space is left in the packet) is ____________.

Discussion

4502.	I-V graph for a mettallic wire at two different temperatures, T1 and T2 is as shown in the figure.Which of the two temperature is lower and why?
Answer» I-V graph for a mettallic wire at two different temperatures, $T_{1}$ and $T_{2}$ is as shown in the figure. Which of the two temperature is lower and why?

Discussion

4503.	Write the uses of horse cart and donkey cart in one sentence each.
Answer» Write the uses of horse cart and donkey cart in one sentence each.

Discussion

4504.	A square column of size 400mm is subjected to ultimate concentric axial force of 1200kN. The grade of material used are M25 and Fe415. The area of steel to be provided assuming zero eccentricity is:
Answer» A square column of size $400 m m$ is subjected to ultimate concentric axial force of $1200 k N$ . The grade of material used are $M 25$ and $F e 415$ . The area of steel to be provided assuming zero eccentricity is:

Discussion

4505.	Why is the opening of a dropper very narrow?
Answer» Why is the opening of a dropper very narrow?

Discussion

4506.	Three charges equal to -Q are placed at the three corners of a equilateral triangle of side a and a charge q at its centre.if the system is in equilibrium find the value o q
Answer» Three charges equal to -Q are placed at the three corners of a equilateral triangle of side a and a charge q at its centre.if the system is in equilibrium find the value o q

Discussion

4507.	Two inductors of equal inductance 10 mH are connected together in a series combination so that their magnetic fields aid each other. Their mutual inductance is given as 5 mH. Calculate the total inductance of the series combination.
Answer» Two inductors of equal inductance $10 mH$ are connected together in a series combination so that their magnetic fields aid each other. Their mutual inductance is given as $5 mH$ . Calculate the total inductance of the series combination.

Discussion

4508.	The diameter of the smallest hole that can be punched in a 20 mm thick plate with ultimate shear strength of material is 152 MPa, and allowable crushing stress in the punch is 450 MPa is________.(Correct upto two decimal place)26.67
Answer» The diameter of the smallest hole that can be punched in a 20 mm thick plate with ultimate shear strength of material is 152 MPa, and allowable crushing stress in the punch is 450 MPa is________. (Correct upto two decimal place) 26.67

Discussion

4509.	On heating the rod, the length of the rod increases. On what factors do the increase in length depends on?
Answer» On heating the rod, the length of the rod increases. On what factors do the increase in length depends on?

Discussion

4510.	A mouse is at a distance of d from a cat. Both starte running with constant equal speed v in such a waythat mouse moves in a straight line perpendicular toinitial line joining cat and mouse, and cat alwaysmoves aiming at mouse. Separation between themwhen both move on the same line is
Answer» A mouse is at a distance of d from a cat. Both starte running with constant equal speed v in such a waythat mouse moves in a straight line perpendicular toinitial line joining cat and mouse, and cat alwaysmoves aiming at mouse. Separation between themwhen both move on the same line is

Discussion

4511.	A body moving around the sun in a circular orbit with constant speed. Is the motion accelerated?
Answer» A body moving around the sun in a circular orbit with constant speed. Is the motion accelerated?

Discussion

4512.	ntThe length of a pendulum is measured as 20.0 cm. The time interval for 100 oscillations is measured as 90s with a stopwatch of 1s resolutions. Find the approximate % change (in g)n
Answer» ntThe length of a pendulum is measured as 20.0 cm. The time interval for 100 oscillations is measured as 90s with a stopwatch of 1s resolutions. Find the approximate % change (in g)n

Discussion

4513.	A stone of 2 kg is thrown with a velocity of 20 ms−1 across the frozen surface of a lake and comes to rest after travelling a distance of 100 m. Calculate the frictional force between the stone and the ice.
Answer» A stone of 2 kg is thrown with a velocity of 20 ${m s}^{- 1}$ across the frozen surface of a lake and comes to rest after travelling a distance of 100 m. Calculate the frictional force between the stone and the ice.

Discussion

4514.	Unwanted, unpleasant and very loud sounds are called:
Answer» Unwanted, unpleasant and very loud sounds are called:

Discussion

4515.	A thrust of 20 N is acting on an area of 2 m2. How much pressure is acting on the surface?
Answer» A thrust of 20 N is acting on an area of 2 $m^{2}$ . How much pressure is acting on the surface?

Discussion

4516.	imagine that you are jumping up and down on a trampoline (a) name the store of energy when you are pressing downwards on the strretchy skin of the trampoline (b) name the store of energy when you are high up in yhe air
Answer» imagine that you are jumping up and down on a trampoline (a) name the store of energy when you are pressing downwards on the strretchy skin of the trampoline (b) name the store of energy when you are high up in yhe air

4516.

imagine that you are jumping up and down on a trampoline (a) name the store of energy when you are pressing downwards on the strretchy skin of the trampoline (b) name the store of energy when you are high up in yhe air

Answer»

imagine that you are jumping up and down on a trampoline

(a) name the store of energy when you are pressing downwards on the strretchy skin of the trampoline

(b) name the store of energy when you are high up in yhe air

Discussion

4517.	Compression and rarefaction is related to which of these waves?
Answer» Compression and rarefaction is related to which of these waves?

Discussion

4518.	A wooden block is floating in water contained in a beaker . If the beaker is placed in free falling elevator during the free fall the upthrust on the block will be?
Answer» A wooden block is floating in water contained in a beaker . If the beaker is placed in free falling elevator during the free fall the upthrust on the block will be?

Discussion

4519.	What do you understand by the term 'point of incidence'?
Answer» What do you understand by the term 'point of incidence'?

Discussion

4520.	What is wind energy
Answer» What is wind energy

Discussion

4521.	A six pole generator with fixed field excitation develops an emf of 100 V, when operating at 1500 rpm. At what speed it must rotate to develop 120 V?
Answer» A six pole generator with fixed field excitation develops an emf of 100 V, when operating at 1500 rpm. At what speed it must rotate to develop 120 V?

Discussion

4522.	Two small dense stars rotate about their common centre of mass as a binary system with the period 1 year for each.One star is of double the mass of the other and the mass of the lighter one is one third of the mass of the sun.Find the distance between the stars if the distance between thecearth and sun is R.
Answer» Two small dense stars rotate about their common centre of mass as a binary system with the period 1 year for each.One star is of double the mass of the other and the mass of the lighter one is one third of the mass of the sun.Find the distance between the stars if the distance between thecearth and sun is R.

Discussion

4523.	specific charge
Answer» specific charge

Discussion

4524.	A ring of diameter R and mass m is pivoted at its rim and is set to perform small oscillations in the vertical plane. If a simple pendulum has same time period as that of the ring then length of the pendulum is A ring of diameter R and mass m is pivoted at its rim and is set to perform small oscillations in the vertical plane. If a simple pendulum has same time period as that of the ring then length of the pendulum is
Answer» A ring of diameter R and mass m is pivoted at its rim and is set to perform small oscillations in the vertical plane. If a simple pendulum has same time period as that of the ring then length of the pendulum is A ring of diameter R and mass m is pivoted at its rim and is set to perform small oscillations in the vertical plane. If a simple pendulum has same time period as that of the ring then length of the pendulum is

Discussion

4525.	50. The density of liquid Butane is 0.8 mgml . 1450mL of this will require how many oxygen molecules for complete burning into CO2 and H2O
Answer» 50. The density of liquid Butane is 0.8 mgml . 1450mL of this will require how many oxygen molecules for complete burning into CO2 and H2O

Discussion

4526.	On adding the salt , what will be the effect on the conductance of solution?
Answer» On adding the salt , what will be the effect on the conductance of solution?

Discussion

4527.	How is the position of image formed by a plane mirror related to the position of the object?
Answer» How is the position of image formed by a plane mirror related to the position of the object?

Discussion

4528.	In an electric field, potential at a point with position vector \overrightarrow r is given as V=(343/mod \overrightarrow{r.} The electric field at \overrightarrow r=3i+2j+6k is
Answer» In an electric field, potential at a point with position vector \overrightarrow r is given as V=(343/mod \overrightarrow{r.} The electric field at \overrightarrow r=3i+2j+6k is

Discussion

4529.	Choose the term to fill in the blanks.(a) ...... has to be applied to change the ..... of a ...... object.(moving, direction, force)(b) When an elephant drags a wooden log over the land, the forces that are applied on the log are ...... , ....... and ........ .(muscular force, mechanical force, gravitational force, frictional force)(c) A ball was set rolling on a large table. If its ...... is to be changed, a ........ will have to be applied on it.(force, motion, gravitation)(d) The force of friction always acts ........ the motion.(along, against)
Answer» Choose the term to fill in the blanks. (a) ...... has to be applied to change the ..... of a ...... object. (moving, direction, force) (b) When an elephant drags a wooden log over the land, the forces that are applied on the log are ...... , ....... and ........ . (muscular force, mechanical force, gravitational force, frictional force) (c) A ball was set rolling on a large table. If its ...... is to be changed, a ........ will have to be applied on it. (force, motion, gravitation) (d) The force of friction always acts ........ the motion. (along, against)

Discussion

4530.	What causes friction between two surfaces in contact when they try to slide past each other?
Answer» What causes friction between two surfaces in contact when they try to slide past each other?

Discussion

4531.	The SI unit of temperature is________.
Answer» The SI unit of temperature is________.

Discussion

4532.	Which device was used to measure the speed of light?
Answer» Which device was used to measure the speed of light?

Discussion

4533.	what is difference between macroscopic and mesoscopic physics
Answer» what is difference between macroscopic and mesoscopic physics

Discussion

4534.	Explain how you can locate the Pole Star with the help of Ursa Major.
Answer» Explain how you can locate the Pole Star with the help of Ursa Major.

Discussion

4535.	Position time graph of a particle moving alongstraight line is shown which is in the form of semi-circle starting from t 2 to t 8 s. Select correctstatement(w)x- s)(0, 0) 2(1) Velocity of particle between tpositive0 to t 2 s is(2) Velocity of particle is opposite to accelerationbetween t 2 to t = 5 s(3) Velocity of particle is opposite to accelerationbetween t 5 to t 8 s(4) Acceleration of particle is positive betweent = 2 s to t, = 5 s while it is negativebetween t, 5 s to t, 8 s1
Answer» Position time graph of a particle moving along straight line is shown which is in the form of semi- circle starting from t 2 to t 8 s. Select correct statement (w)x - s) (0, 0) 2 (1) Velocity of particle between t positive 0 to t 2 s is (2) Velocity of particle is opposite to acceleration between t 2 to t = 5 s (3) Velocity of particle is opposite to acceleration between t 5 to t 8 s (4) Acceleration of particle is positive between t = 2 s to t, = 5 s while it is negative between t, 5 s to t, 8 s 1

Discussion

4536.	A large rope having linear mass density x is being pulled by a horizontal force so that the lower portion of rope is at rest and the upper portion is moving with cons†an t velocity v. The value of the force is?
Answer» A large rope having linear mass density x is being pulled by a horizontal force so that the lower portion of rope is at rest and the upper portion is moving with cons†an t velocity v. The value of the force is?

Discussion

4537.	How does the sun produce light?
Answer» How does the sun produce light?

Discussion

4538.	ntIn a case of two unlike charges on a straight line, why can't the third charge be present between the two charges?n
Answer» ntIn a case of two unlike charges on a straight line, why can't the third charge be present between the two charges?n

Discussion

4539.	<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->Consider the following in the context of Sounding rockets:1. Used for upper atmospheric research satellites.2. Generally consist of two or three stages propulsion.3. Costlier than other launchers.Select the correct statement:
Answer» <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Consider the following in the context of Sounding rockets: 1. Used for upper atmospheric research satellites. 2. Generally consist of two or three stages propulsion. 3. Costlier than other launchers. Select the correct statement:

Discussion

4540.	A charge +q is kept inside the cavity present in a solid conducting sphere, as shown in figure.If the sphere is given a charge Q, then total charge appearing on outer surface of sphere will be:
Answer» A charge $+ q$ is kept inside the cavity present in a solid conducting sphere, as shown in figure. If the sphere is given a charge $Q$ , then total charge appearing on outer surface of sphere will be:

Discussion

4541.	If an object is placed between two parallel plane mirrors, then the number of images formed will be:
Answer» If an object is placed between two parallel plane mirrors, then the number of images formed will be:

Discussion

4542.	When static, sliding and rolling frictional forces are to be arranged in an increasing order, which one of the following options would be correct?
Answer» When static, sliding and rolling frictional forces are to be arranged in an increasing order, which one of the following options would be correct?

Discussion

4543.	A light string passes over a frictionless pulley. To one of its ends a mass of 6 kg is attached. To its other end a mass of 10 kg is attached. The tension in the thread will be [RPET 1996; JIPMER 2001, 02]
Answer» A light string passes over a frictionless pulley. To one of its ends a mass of 6 kg is attached. To its other end a mass of 10 kg is attached. The tension in the thread will be [RPET 1996; JIPMER 2001, 02]

4543.

A light string passes over a frictionless pulley. To one of its ends a mass of 6 kg is attached. To its other end a mass of 10 kg is attached. The tension in the thread will be [RPET 1996; JIPMER 2001, 02]

Answer»

A light string passes over a frictionless pulley. To one of its ends a mass of 6 kg is attached. To its other end a mass of 10 kg is attached. The tension in the thread will be

[RPET 1996; JIPMER 2001, 02]

Discussion

4544.	A spring, which is initially in its unstretched condition is first stretched by length d and then again by a further length . The work done in the first case is W1 and work done in second case is W2. Then, relation between W1 and W2 is
Answer» A spring, which is initially in its unstretched condition is first stretched by length d and then again by a further length . The work done in the first case is W1 and work done in second case is W2. Then, relation between W1 and W2 is

Discussion

4545.	A box of mass 50kg is kept on a horizontal floor.when it is pushed by a horizontal force H,it moves with a constant velocity.If it is pushed by a horizontal force 1.5H,it moves with an acceleration of 0.1metre/ second square.Find the value of H
Answer» A box of mass 50kg is kept on a horizontal floor.when it is pushed by a horizontal force H,it moves with a constant velocity.If it is pushed by a horizontal force 1.5H,it moves with an acceleration of 0.1metre/ second square.Find the value of H

Discussion

4546.	30. Find the tension required to hold the cart in equilibrium if all the surfaces are frictionless
Answer» 30. Find the tension required to hold the cart in equilibrium if all the surfaces are frictionless

Discussion

4547.	How can we decrease FRICTION? give 2 example
Answer» How can we decrease FRICTION? give 2 example

Discussion

4548.	The density of water will ___ with temperature.
Answer» The density of water will ___ with temperature.

Discussion

4549.	Draw the following diagram in your answer-book and show the formation of an image with the help of suitable rays.What will be the size of image relative to the size of the object?
Answer» Draw the following diagram in your answer-book and show the formation of an image with the help of suitable rays. What will be the size of image relative to the size of the object?

Discussion

4550.	72.Three sound waves of equal amplitudes have frequencies (n-1), n, (n+1). They superimpose to give beats. The number of beats produced per second will be (I) 1 (II) 4 (III) 3 (IV) 2
Answer» 72.Three sound waves of equal amplitudes have frequencies (n-1), n, (n+1). They superimpose to give beats. The number of beats produced per second will be (I) 1 (II) 4 (III) 3 (IV) 2

Discussion

Explore topic-wise InterviewSolutions in .

A match box measures 4 cm×2.5 cm×1.5 cm. Volume of a packet containing 12 such boxes (no space is left in the packet) is ____________.

I-V graph for a mettallic wire at two different temperatures, T1 and T2 is as shown in the figure.Which of the two temperature is lower and why?

Write the uses of horse cart and donkey cart in one sentence each.

A square column of size 400mm is subjected to ultimate concentric axial force of 1200kN. The grade of material used are M25 and Fe415. The area of steel to be provided assuming zero eccentricity is:

Why is the opening of a dropper very narrow?

Three charges equal to -Q are placed at the three corners of a equilateral triangle of side a and a charge q at its centre.if the system is in equilibrium find the value o q

Two inductors of equal inductance 10 mH are connected together in a series combination so that their magnetic fields aid each other. Their mutual inductance is given as 5 mH. Calculate the total inductance of the series combination.

The diameter of the smallest hole that can be punched in a 20 mm thick plate with ultimate shear strength of material is 152 MPa, and allowable crushing stress in the punch is 450 MPa is________.(Correct upto two decimal place)26.67

On heating the rod, the length of the rod increases. On what factors do the increase in length depends on?

A mouse is at a distance of d from a cat. Both starte running with constant equal speed v in such a waythat mouse moves in a straight line perpendicular toinitial line joining cat and mouse, and cat alwaysmoves aiming at mouse. Separation between themwhen both move on the same line is

A body moving around the sun in a circular orbit with constant speed. Is the motion accelerated?

ntThe length of a pendulum is measured as 20.0 cm. The time interval for 100 oscillations is measured as 90s with a stopwatch of 1s resolutions. Find the approximate % change (in g)n

A stone of 2 kg is thrown with a velocity of 20 ms−1 across the frozen surface of a lake and comes to rest after travelling a distance of 100 m. Calculate the frictional force between the stone and the ice.

Unwanted, unpleasant and very loud sounds are called:

A thrust of 20 N is acting on an area of 2 m2. How much pressure is acting on the surface?

imagine that you are jumping up and down on a trampoline (a) name the store of energy when you are pressing downwards on the strretchy skin of the trampoline (b) name the store of energy when you are high up in yhe air

Compression and rarefaction is related to which of these waves?

A wooden block is floating in water contained in a beaker . If the beaker is placed in free falling elevator during the free fall the upthrust on the block will be?

What do you understand by the term 'point of incidence'?

What is wind energy

A six pole generator with fixed field excitation develops an emf of 100 V, when operating at 1500 rpm. At what speed it must rotate to develop 120 V?

specific charge

50. The density of liquid Butane is 0.8 mgml . 1450mL of this will require how many oxygen molecules for complete burning into CO2 and H2O

On adding the salt , what will be the effect on the conductance of solution?

How is the position of image formed by a plane mirror related to the position of the object?

In an electric field, potential at a point with position vector \overrightarrow r is given as V=(343/mod \overrightarrow{r.} The electric field at \overrightarrow r=3i+2j+6k is

What causes friction between two surfaces in contact when they try to slide past each other?

The SI unit of temperature is________.

Which device was used to measure the speed of light?

what is difference between macroscopic and mesoscopic physics

Explain how you can locate the Pole Star with the help of Ursa Major.

A large rope having linear mass density x is being pulled by a horizontal force so that the lower portion of rope is at rest and the upper portion is moving with cons†an t velocity v. The value of the force is?

How does the sun produce light?

ntIn a case of two unlike charges on a straight line, why can't the third charge be present between the two charges?n

A charge +q is kept inside the cavity present in a solid conducting sphere, as shown in figure.If the sphere is given a charge Q, then total charge appearing on outer surface of sphere will be:

If an object is placed between two parallel plane mirrors, then the number of images formed will be:

When static, sliding and rolling frictional forces are to be arranged in an increasing order, which one of the following options would be correct?

A light string passes over a frictionless pulley. To one of its ends a mass of 6 kg is attached. To its other end a mass of 10 kg is attached. The tension in the thread will be [RPET 1996; JIPMER 2001, 02]

A spring, which is initially in its unstretched condition is first stretched by length d and then again by a further length . The work done in the first case is W1 and work done in second case is W2. Then, relation between W1 and W2 is

A box of mass 50kg is kept on a horizontal floor.when it is pushed by a horizontal force H,it moves with a constant velocity.If it is pushed by a horizontal force 1.5H,it moves with an acceleration of 0.1metre/ second square.Find the value of H

30. Find the tension required to hold the cart in equilibrium if all the surfaces are frictionless

How can we decrease FRICTION? give 2 example

The density of water will ___ with temperature.

Draw the following diagram in your answer-book and show the formation of an image with the help of suitable rays.​What will be the size of image relative to the size of the object?

72.Three sound waves of equal amplitudes have frequencies (n-1), n, (n+1). They superimpose to give beats. The number of beats produced per second will be (I) 1 (II) 4 (III) 3 (IV) 2

Draw the following diagram in your answer-book and show the formation of an image with the help of suitable rays.What will be the size of image relative to the size of the object?