6277 + Interview Questions in Physics Page 30 InterviewSolution

1451.	A person travels 30 m towards North then 20 m towards east and then 30√2 m towards south west.What is the displacement from origin?
Answer» A person travels 30 m towards North then 20 m towards east and then 30√2 m towards south west. What is the displacement from origin?

Discussion

1452.	94.the string of a simple pendulum is replaced by a thin uniform rod of mass M and length L if mass of bob is m . if its allowed to oscillate with small amplitude the period of oscillation is
Answer» 94.the string of a simple pendulum is replaced by a thin uniform rod of mass M and length L if mass of bob is m . if its allowed to oscillate with small amplitude the period of oscillation is

Discussion

1453.	32.A point charge +q moves from point P to origin 0 along the path PQRO in a uniform electric field E.Find thr work done by the field
Answer» 32.A point charge +q moves from point P to origin 0 along the path PQRO in a uniform electric field E.Find thr work done by the field

Discussion

1454.	The compressibility of water is 4×10−5 per unit atmospheric pressure. The decrease in volume of 100 cm3 of water under a pressure of 100 atmosphere will be
Answer» The compressibility of water is $4 \times 10^{- 5}$ per unit atmospheric pressure. The decrease in volume of $100 c m^{3}$ of water under a pressure of 100 atmosphere will be

Discussion

1455.	position x of a particle in straight line motion as a function of time is given as x^2= (1+t^2) its acceleration is equal to
Answer» position x of a particle in straight line motion as a function of time is given as x^2= (1+t^2) its acceleration is equal to

Discussion

1456.	Question 5 From the given v – t graph (Fig.), it can be inferred that the object is (a) in uniform motion (b) at rest (c) in non-uniform motion (d) moving with uniform acceleration
Answer» Question 5 From the given v – t graph (Fig.), it can be inferred that the object is (a) in uniform motion (b) at rest (c) in non-uniform motion (d) moving with uniform acceleration

Discussion

1457.	A black body emits heat at the rate of 20 W .When its temperature is 727 degrees C.Another black body emits heat at the rate of 15 W,when its temperature is 227 degrees C.Compare the area of the surface of the two bodies,if the surrounding is at NTP
Answer» A black body emits heat at the rate of 20 W .When its temperature is 727 degrees C.Another black body emits heat at the rate of 15 W,when its temperature is 227 degrees C.Compare the area of the surface of the two bodies,if the surrounding is at NTP

Discussion

1458.	what is a super conducto
Answer» what is a super conducto

Discussion

1459.	1 kg ice at -10 degree celsius is mixed with 1 kg water at 100 degree celsius. Then find equilibrium temperature and mixture content
Answer» 1 kg ice at -10 degree celsius is mixed with 1 kg water at 100 degree celsius. Then find equilibrium temperature and mixture content

Discussion

1460.	I am in a dark room where there's no light ( which is very dark) and a mirror. As known mirror needs light for reflection but how is it possible to reflect our shadows on the mirror even though there's no light?
Answer» I am in a dark room where there's no light ( which is very dark) and a mirror. As known mirror needs light for reflection but how is it possible to reflect our shadows on the mirror even though there's no light?

Discussion

1461.	Heating effect of current and it's relations and application
Answer» Heating effect of current and it's relations and application

Discussion

1462.	Why is a shadow black in colour?
Answer» Why is a shadow black in colour?

Discussion

1463.	What's the difference between tangent galvanometer and a voltmeter? what is the difference between measuring the strength of the electric current and measuring the electric current?
Answer» What's the difference between tangent galvanometer and a voltmeter? what is the difference between measuring the strength of the electric current and measuring the electric current?

Discussion

1464.	If the radius of the earth shrinks by 4% and there is no change in its mass, the value of g increases by ___ %.
Answer» If the radius of the earth shrinks by 4% and there is no change in its mass, the value of g increases by ___ %.

Discussion

1465.	A body moves along the curved path of a quarter circle. Calculate the ratio of distance to displacement : 1) 11 : 72) 7 : 113) 11 : √2 × 74) 7 : 11 √2
Answer» A body moves along the curved path of a quarter circle. Calculate the ratio of distance to displacement : 1) 11 : 7 2) 7 : 11 3) 11 : √2 × 7 4) 7 : 11 √2

Discussion

1466.	The vector OA where O is origin is given byOA=2i+2. Now it is rotated by 45^° clockwise aboutO. What willbe the new vector?2j(1) 22(2)2/2i(4)
Answer» The vector OA where O is origin is given byOA=2i+2. Now it is rotated by 45^° clockwise aboutO. What willbe the new vector?2j(1) 22(2)2/2i(4)

Discussion

1467.	Statement 1: Atmospheric pressure is a huge pressure which is equivalent to the weight of ten cars pressing on us every square meter. Statement 2: We are getting crushed by this huge pressure and that's why we are feeling muscle pain.
Answer» Statement 1: Atmospheric pressure is a huge pressure which is equivalent to the weight of ten cars pressing on us every square meter. Statement 2: We are getting crushed by this huge pressure and that's why we are feeling muscle pain.

1467.

Statement 1: Atmospheric pressure is a huge pressure which is equivalent to the weight of ten cars pressing on us every square meter. Statement 2: We are getting crushed by this huge pressure and that's why we are feeling muscle pain.

Answer»

Statement 1: Atmospheric pressure is a huge pressure which is equivalent to the weight of ten cars pressing on us every square meter.

Statement 2: We are getting crushed by this huge pressure and that's why we are feeling muscle pain.

Discussion

1468.	What should be the weight of the Bob in pendulum to complete one oscillation in one minute?
Answer» What should be the weight of the Bob in pendulum to complete one oscillation in one minute?

Discussion

1469.	The Young's modulus of a wire is Y. If the energy per unit volume is E, then the strain will be
Answer» The Young's modulus of a wire is Y. If the energy per unit volume is E, then the strain will be

Discussion

1470.	A person moves away from a mirror at a constant speed of 5 ms−1. At what speed would his image move with respect to the mirror?
Answer» A person moves away from a mirror at a constant speed of $5 m s^{- 1}$ . At what speed would his image move with respect to the mirror?

Discussion

1471.	A boy is playing with a tire of radius 0.5m. He accelerates it from 5rpm to 25 rpm in 15 seconds. The linear acceleration of tire is
Answer» A boy is playing with a tire of radius 0.5m. He accelerates it from 5rpm to 25 rpm in 15 seconds. The linear acceleration of tire is

Discussion

1472.	there is a sphere rotatung with w . i keep it gently on a rough surface then what will be its vel.when it does pure rolling . tell both momentum conservation (how? ext force is present)and kinematic
Answer» there is a sphere rotatung with w . i keep it gently on a rough surface then what will be its vel.when it does pure rolling . tell both momentum conservation (how? ext force is present)and kinematic

Discussion

1473.	Question 3 Paheli and Boojho measured their body temperature. Paheli found her’s to be 98.6∘F and Boojho recorded 37∘C. Which of the followng statement is true? (a) Paheli has a higher body temperature than boojho. (b) Paheli has a lower body temperature than boojho (c) Both have normal body temperature. (d) Both are suffering from fever.
Answer» Question 3 Paheli and Boojho measured their body temperature. Paheli found her’s to be ${98.6}^{\circ} F$ and Boojho recorded $37^{\circ} C$ . Which of the followng statement is true? (a) Paheli has a higher body temperature than boojho. (b) Paheli has a lower body temperature than boojho (c) Both have normal body temperature. (d) Both are suffering from fever.

1473.

Question 3 Paheli and Boojho measured their body temperature. Paheli found her’s to be 98.6∘F and Boojho recorded 37∘C. Which of the followng statement is true? (a) Paheli has a higher body temperature than boojho. (b) Paheli has a lower body temperature than boojho (c) Both have normal body temperature. (d) Both are suffering from fever.

Answer»

Question 3

Paheli and Boojho measured their body temperature. Paheli found her’s to be ${98.6}^{\circ} F$ and Boojho recorded $37^{\circ} C$ . Which of the followng statement is true?

(a) Paheli has a higher body temperature than boojho.

(b) Paheli has a lower body temperature than boojho

(c) Both have normal body temperature.

(d) Both are suffering from fever.

Discussion

1474.	Why does Oxygen Dissociation Curve move towards right with increase in temperature ?
Answer» Why does Oxygen Dissociation Curve move towards right with increase in temperature ?

Discussion

1475.	When two identical non-metals are placed in an electric field, the magnitude of induced charge on them will be:1) Zero2) Unequal3) Equal4) Cannot be determined.
Answer» When two identical non-metals are placed in an electric field, the magnitude of induced charge on them will be: 1) Zero 2) Unequal 3) Equal 4) Cannot be determined.

Discussion

1476.	After two balloons were rubbed with the silk saree, it was found that the balloons repelled away from each other. Which of the following explains the observation?
Answer» After two balloons were rubbed with the silk saree, it was found that the balloons repelled away from each other. Which of the following explains the observation?

Discussion

1477.	27 The electrostatic potential difference between points A and B, V-V Which are distances r=2.0 m and1.0 m from an infinitely long thin wire 1.0 pC/m is4-11 NC(1) 12.47 x 103 V(2-12.47 103 VX(3) 18 x 103 V(4)-18 x 103 V28. In the above situation (i.e., Q. 27), if an electron is released from rest at point A, it's speed at point B will-be(1) 6.6 x 107 m/s(2) 3.3x 107 m/ls(3) 1.1 x 107 m/s(4) 2.2x107 m/s
Answer» 27 The electrostatic potential difference between points A and B, V-V Which are distances r=2.0 m and1.0 m from an infinitely long thin wire 1.0 pC/m is4-11 NC(1) 12.47 x 103 V(2-12.47 103 VX(3) 18 x 103 V(4)-18 x 103 V28. In the above situation (i.e., Q. 27), if an electron is released from rest at point A, it's speed at point B will-be(1) 6.6 x 107 m/s(2) 3.3x 107 m/ls(3) 1.1 x 107 m/s(4) 2.2x107 m/s

Discussion

1478.	Between displacement wave and pressure wave which one leads?
Answer» Between displacement wave and pressure wave which one leads?

Discussion

1479.	Which is the component that makes an electric circuit open in case of an excess current?
Answer» Which is the component that makes an electric circuit open in case of an excess current?

Discussion

1480.	Is hollow bricks an absorber of heat?
Answer» Is hollow bricks an absorber of heat?

Discussion

1481.	Three dimensional objects have __ as they occupy some air space when placed on the ground.
Answer» Three dimensional objects have __ as they occupy some air space when placed on the ground.

Discussion

1482.	State all the types of motion involved in the following scenarios.1. Earth's motion around the sun2. Rolling ball on the ground
Answer» State all the types of motion involved in the following scenarios. 1. Earth's motion around the sun 2. Rolling ball on the ground

Discussion

1483.	A 20.0 g copper ring at 0.000∘ has an inner diameter of D=2.54000 cm. An aluminum sphere at 100.0∘C has a diameter of d=2.54508 cm. The sphere is put on top of the ring and the two are allowed to come to thermal equilibrium, with no heat lost to the surroundings. The sphere just passes through the ring at the equilibrium temperature. What is the mass of the sphere?
Answer» A 20.0 g copper ring at ${0.000}^{\circ}$ has an inner diameter of $D = 2.54000$ cm. An aluminum sphere at ${100.0}^{\circ}$ C has a diameter of $d = 2.54508$ cm. The sphere is put on top of the ring and the two are allowed to come to thermal equilibrium, with no heat lost to the surroundings. The sphere just passes through the ring at the equilibrium temperature. What is the mass of the sphere?

Discussion

1484.	A candle of height 10 cm is kept 5 cm away from a plane mirror. The height of the image is ___ cm.
Answer» A candle of height 10 cm is kept 5 cm away from a plane mirror. The height of the image is ___ $c m$ .

Discussion

1485.	What are the necessary items required to build an electric torch?
Answer» What are the necessary items required to build an electric torch?

Discussion

1486.	What are the units of period of oscillation and of frequency?
Answer» What are the units of period of oscillation and of frequency?

Discussion

1487.	What is the kinetic energy of a body of mass 10 kg moving at a speed of 10 m/s?
Answer» What is the kinetic energy of a body of mass 10 kg moving at a speed of 10 m/s?

Discussion

1488.	what will be the work when initial kinetic energy is higher than final energy? negative or positive
Answer» what will be the work when initial kinetic energy is higher than final energy? negative or positive

Discussion

1489.	How gravitational force play a role in formation of stars??
Answer» How gravitational force play a role in formation of stars??

Discussion

1490.	An electron is moving in a circular path of radius 0.25 m with the period of time 10^-19 sec. The current constituted by moving electron is
Answer» An electron is moving in a circular path of radius 0.25 m with the period of time 10^-19 sec. The current constituted by moving electron is

Discussion

1491.	In a new system of units the units of length and time are respectively bm and Cs what is the magnitude of 6W in this system
Answer» In a new system of units the units of length and time are respectively bm and Cs what is the magnitude of 6W in this system

Discussion

1492.	Which type of motion do the wheels of a moving car exhibit?
Answer» Which type of motion do the wheels of a moving car exhibit?

Discussion

1493.	One end of a uniform rod of mass M and cross-sectional area A is suspended from a rigid support and an equal mass M is suspended from the other end. The stress at the mid-point of the rod will be
Answer» One end of a uniform rod of mass M and cross-sectional area A is suspended from a rigid support and an equal mass M is suspended from the other end. The stress at the mid-point of the rod will be

Discussion

1494.	Will the magnitude of avg. Velocity be equal to the magnitude of avg. Speed when distance travelled by an object is equal to the displacement of the object?
Answer» Will the magnitude of avg. Velocity be equal to the magnitude of avg. Speed when distance travelled by an object is equal to the displacement of the object?

Discussion

1495.	A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
Answer» A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?

Discussion

1496.	1. Magnetic field lines around a magnet cannot intersect.2. When magnetic field lines intersect, the compass at the point of intersection can point in two different directions.Choose the correct option.
Answer» 1. Magnetic field lines around a magnet cannot intersect. 2. When magnetic field lines intersect, the compass at the point of intersection can point in two different directions. Choose the correct option.

Discussion

1497.	Which among the following on the Richter scale is of the highest magnitude?
Answer» Which among the following on the Richter scale is of the highest magnitude?

Discussion

1498.	Ratio of kinetic energy of a particle projected from ground at highest point to point of projection is 1/4. Angle of projection with horizontal is?
Answer» Ratio of kinetic energy of a particle projected from ground at highest point to point of projection is 1/4. Angle of projection with horizontal is?

Discussion

1499.	Matt has a magnetic compass which is pointing in the north-south direction. He brings a large magnet close to it. In which direction would the magnetic needle align?
Answer» Matt has a magnetic compass which is pointing in the north-south direction. He brings a large magnet close to it. In which direction would the magnetic needle align?

Discussion

1500.	48. A body cools down from 45degree celsius to 40 degree celsius in 5 min . and to 35degree celsius in another 8 min . Find the temperature of surrounding
Answer» 48. A body cools down from 45degree celsius to 40 degree celsius in 5 min . and to 35degree celsius in another 8 min . Find the temperature of surrounding

Discussion

Explore topic-wise InterviewSolutions in .

A person travels 30 m towards North then 20 m towards east and then 30√2 m towards south west.What is the displacement from origin?

94.the string of a simple pendulum is replaced by a thin uniform rod of mass M and length L if mass of bob is m . if its allowed to oscillate with small amplitude the period of oscillation is

32.A point charge +q moves from point P to origin 0 along the path PQRO in a uniform electric field E.Find thr work done by the field

The compressibility of water is 4×10−5 per unit atmospheric pressure. The decrease in volume of 100 cm3 of water under a pressure of 100 atmosphere will be

position x of a particle in straight line motion as a function of time is given as x^2= (1+t^2) its acceleration is equal to

Question 5 From the given v – t graph (Fig.), it can be inferred that the object is (a) in uniform motion (b) at rest (c) in non-uniform motion (d) moving with uniform acceleration

A black body emits heat at the rate of 20 W .When its temperature is 727 degrees C.Another black body emits heat at the rate of 15 W,when its temperature is 227 degrees C.Compare the area of the surface of the two bodies,if the surrounding is at NTP

what is a super conducto

1 kg ice at -10 degree celsius is mixed with 1 kg water at 100 degree celsius. Then find equilibrium temperature and mixture content

I am in a dark room where there's no light ( which is very dark) and a mirror. As known mirror needs light for reflection but how is it possible to reflect our shadows on the mirror even though there's no light?

Heating effect of current and it's relations and application

Why is a shadow black in colour?

What's the difference between tangent galvanometer and a voltmeter? what is the difference between measuring the strength of the electric current and measuring the electric current?

If the radius of the earth shrinks by 4% and there is no change in its mass, the value of g increases by ___ %.

A body moves along the curved path of a quarter circle. Calculate the ratio of distance to displacement : 1) 11 : 72) 7 : 113) 11 : √2 × 74) 7 : 11 √2

The vector OA where O is origin is given byOA=2i+2. Now it is rotated by 45^° clockwise aboutO. What willbe the new vector?2j(1) 22(2)2/2i(4)

Statement 1: Atmospheric pressure is a huge pressure which is equivalent to the weight of ten cars pressing on us every square meter. Statement 2: We are getting crushed by this huge pressure and that's why we are feeling muscle pain.

What should be the weight of the Bob in pendulum to complete one oscillation in one minute?

The Young's modulus of a wire is Y. If the energy per unit volume is E, then the strain will be

A person moves away from a mirror at a constant speed of 5 ms−1. At what speed would his image move with respect to the mirror?

A boy is playing with a tire of radius 0.5m. He accelerates it from 5rpm to 25 rpm in 15 seconds. The linear acceleration of tire is

there is a sphere rotatung with w . i keep it gently on a rough surface then what will be its vel.when it does pure rolling . tell both momentum conservation (how? ext force is present)and kinematic

Why does Oxygen Dissociation Curve move towards right with increase in temperature ?

When two identical non-metals are placed in an electric field, the magnitude of induced charge on them will be:1) Zero2) Unequal3) Equal4) Cannot be determined.

After two balloons were rubbed with the silk saree, it was found that the balloons repelled away from each other. Which of the following explains the observation?

Between displacement wave and pressure wave which one leads?

Which is the component that makes an electric circuit open in case of an excess current?

Is hollow bricks an absorber of heat?

Three dimensional objects have __ as they occupy some air space when placed on the ground.

State all the types of motion involved in the following scenarios.1. Earth's motion around the sun2. Rolling ball on the ground

A candle of height 10 cm is kept 5 cm away from a plane mirror. The height of the image is ___ cm.

What are the necessary items required to build an electric torch?

What are the units of period of oscillation and of frequency?

What is the kinetic energy of a body of mass 10 kg moving at a speed of 10 m/s?

what will be the work when initial kinetic energy is higher than final energy? negative or positive

How gravitational force play a role in formation of stars??

An electron is moving in a circular path of radius 0.25 m with the period of time 10^-19 sec. The current constituted by moving electron is

In a new system of units the units of length and time are respectively bm and Cs what is the magnitude of 6W in this system

Which type of motion do the wheels of a moving car exhibit?

One end of a uniform rod of mass M and cross-sectional area A is suspended from a rigid support and an equal mass M is suspended from the other end. The stress at the mid-point of the rod will be

Will the magnitude of avg. Velocity be equal to the magnitude of avg. Speed when distance travelled by an object is equal to the displacement of the object?

A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?

1. Magnetic field lines around a magnet cannot intersect.2. When magnetic field lines intersect, the compass at the point of intersection can point in two different directions.Choose the correct option.

Which among the following on the Richter scale is of the highest magnitude?

Ratio of kinetic energy of a particle projected from ground at highest point to point of projection is 1/4. Angle of projection with horizontal is?

Matt has a magnetic compass which is pointing in the north-south direction. He brings a large magnet close to it. In which direction would the magnetic needle align?

48. A body cools down from 45degree celsius to 40 degree celsius in 5 min . and to 35degree celsius in another 8 min . Find the temperature of surrounding