6277 + Interview Questions in Physics Page 28 InterviewSolution

1351.	a mirror is inclined at an angle θ with the horizontal.if ray of light is incident at an angle θ,then the reflected raymake the angle with horizontal
Answer» a mirror is inclined at an angle θ with the horizontal.if ray of light is incident at an angle θ,then the reflected raymake the angle with horizontal

Discussion

1352.	A beam of light falls on a smooth wall. Will you observe regular reflection or diffused reflection from the wall?
Answer» A beam of light falls on a smooth wall. Will you observe regular reflection or diffused reflection from the wall?

Discussion

1353.	If 'i' represents the angle of incidence and 'r' represents the angle of reflection, then which of the following option(s) is true?
Answer» If ' $i$ ' represents the angle of incidence and ' $r$ ' represents the angle of reflection, then which of the following option(s) is true?

Discussion

1354.	If we put a green leaf under a red light what colour will it appear?
Answer» If we put a green leaf under a red light what colour will it appear?

Discussion

1355.	A three phase supply is used when the power load exceeds ___ watt.
Answer» A three phase supply is used when the power load exceeds ___ watt.

Discussion

1356.	A plane mirror is placed at a distance of 12.5 cm from the focus of a concave mirror of radius of curvature 20 cm. Find where an object can be placed between the two mirrors, so that the first image in both the mirrors coincide.
Answer» A plane mirror is placed at a distance of 12.5 cm from the focus of a concave mirror of radius of curvature 20 cm. Find where an object can be placed between the two mirrors, so that the first image in both the mirrors coincide.

Discussion

1357.	A closed organ pipe of length L and an open organ pipe contain gases of densities ρ1 and ρ2 respecticely. The compressibility of gases are eqaul in both the pipes. Both the pipes are vibrating in their first overtone with same frequency. The length of the open pipe is x3L√ρ1ρ2. Where x is (Round off to the Nearest Integer)
Answer» A closed organ pipe of length $L$ and an open organ pipe contain gases of densities $ρ_{1}$ and $ρ_{2}$ respecticely. The compressibility of gases are eqaul in both the pipes. Both the pipes are vibrating in their first overtone with same frequency. The length of the open pipe is $\frac{x}{3} L \sqrt{\frac{ρ_{1}}{ρ_{2}}}$ . Where $x$ is (Round off to the Nearest Integer)

Discussion

1358.	All kinds of ways an image can be formed by concave and convex lens
Answer» All kinds of ways an image can be formed by concave and convex lens

Discussion

1359.	charge of silicon in orthosilicate and pyrosilicate
Answer» charge of silicon in orthosilicate and pyrosilicate

Discussion

1360.	Explain hamiliton operator and schrodinger wave equation
Answer» Explain hamiliton operator and schrodinger wave equation

Discussion

1361.	Metal cap of an electric cell is__________.
Answer» Metal cap of an electric cell is__________.

Discussion

1362.	Why is it always the bulb of the thermometer that breaks?
Answer» Why is it always the bulb of the thermometer that breaks?

Discussion

1363.	What is thermal equilibrium? How are the temperature of the two bodies which are in thermal equillibrium related to each other?
Answer» What is thermal equilibrium? How are the temperature of the two bodies which are in thermal equillibrium related to each other?

Discussion

1364.	The % error in MEASUREMENT of a PHYSICAL quantity m, given by m=pie tanA is minimum when1. A=45°2. A=30°3. A=90°4. A=60°
Answer» The % error in MEASUREMENT of a PHYSICAL quantity m, given by m=pie tanA is minimum when 1. A=45° 2. A=30° 3. A=90° 4. A=60°

Discussion

1365.	A object changing its position with respect to a reference body with time is ____ with respect to the body.
Answer» A object changing its position with respect to a reference body with time is ____ with respect to the body.

Discussion

1366.	If the temperature of a uniform rod is slightly increased by At, its moment of inertia I about a line parallel to itself will increase by )(a) zero (b) (c) 2 (d) 3alM.
Answer» If the temperature of a uniform rod is slightly increased by At, its moment of inertia I about a line parallel to itself will increase by )(a) zero (b) (c) 2 (d) 3alM.

Discussion

1367.	A mass m moving horizonatally ( along the X-axix) with velocity V-collides and sticks to mass of 3 m moving vertically upward (along with y-axis) with velocity 2v. The final velocity of the combination is ?
Answer» A mass m moving horizonatally ( along the X-axix) with velocity V-collides and sticks to mass of 3 m moving vertically upward (along with y-axis) with velocity 2v. The final velocity of the combination is ?

Discussion

1368.	A hot body placed in air is cooled down according to Newton’s law of cooling, the rate of decrease of temperature being k times the temperature difference from the surrounding. Starting from t=0, the time in which the body will lose half the maximum heat it can lose is lnak. Find the value of a.
Answer» A hot body placed in air is cooled down according to Newton’s law of cooling, the rate of decrease of temperature being $k$ times the temperature difference from the surrounding. Starting from $t = 0$ , the time in which the body will lose half the maximum heat it can lose is $\frac{ln a}{k}$ . Find the value of $a$ .

Discussion

1369.	Write answers to the following questions.(a) Give a simple experiment to show that a medium is necessary for the propagation of sound.(b) How is sound produced in drums?(c) What is noise?
Answer» Write answers to the following questions. (a) Give a simple experiment to show that a medium is necessary for the propagation of sound. (b) How is sound produced in drums? (c) What is noise?

1369.

Write answers to the following questions.(a) Give a simple experiment to show that a medium is necessary for the propagation of sound.(b) How is sound produced in drums?(c) What is noise?

Answer»

Write answers to the following questions.

(a) Give a simple experiment to show that a medium is necessary for the propagation of sound.

(b) How is sound produced in drums?

(c) What is noise?

Discussion

1370.	Question 14Choose the incorrect statement regarding wind power.(a) It is expected to harness wind power to minimum in open space.(b) The potential energy content of wind blowing at high altitudes is the source of wind power.(c) Wind hitting at the blades of a windmill causes them to rotate The rotation thus achieved can be utilised further.(d) One possible method of utilising the energy of rotational motion of the blades of a windmill is to run the turbine.
Answer» Question 14 Choose the incorrect statement regarding wind power. (a) It is expected to harness wind power to minimum in open space. (b) The potential energy content of wind blowing at high altitudes is the source of wind power. (c) Wind hitting at the blades of a windmill causes them to rotate The rotation thus achieved can be utilised further. (d) One possible method of utilising the energy of rotational motion of the blades of a windmill is to run the turbine.

Discussion

1371.	65. the ratio of diameters of 2 wires of same material is n:1.the length of each wire is 4 m.on applying the same load increase in length of thin wire will be
Answer» 65. the ratio of diameters of 2 wires of same material is n:1.the length of each wire is 4 m.on applying the same load increase in length of thin wire will be

Discussion

1372.	What is thermal conductivity?
Answer» What is thermal conductivity?

Discussion

1373.	Is it important or will be benificial to learn the all SI base unit defination
Answer» Is it important or will be benificial to learn the all SI base unit defination

Discussion

1374.	Question 7ABCD is a rhombus. Show that diagonal AC bisects ∠A as well as ∠C and diagonal BD bisects ∠B as well as ∠D.
Answer» Question 7 ABCD is a rhombus. Show that diagonal AC bisects $∠ A$ as well as $∠ C$ and diagonal BD bisects $∠ B$ as well as $∠ D$ .

Discussion

1375.	A person goes from A to B at a speed of 40 m s−1 and comes back from B to A at a speed of 60 m s−1. What is his average speed?
Answer» A person goes from A to B at a speed of $40 {m s}^{- 1}$ and comes back from B to A at a speed of $60 {m s}^{- 1}$ . What is his average speed?

Discussion

1376.	Select an appropriate verb in the past tense for the blank. The trainees ______ the wrong building.
Answer» Select an appropriate verb in the past tense for the blank. The trainees ______ the wrong building.

1376.

Select an appropriate verb in the past tense for the blank. The trainees ______ the wrong building.

Answer»

Select an appropriate verb in the past tense for the blank.

The trainees ______ the wrong building.

Discussion

1377.	When the reflected rays from an object appear to meet at a point. The image formed will be:
Answer» When the reflected rays from an object appear to meet at a point. The image formed will be:

Discussion

1378.	What is the difference between conduction ,convection and tadiatic
Answer» What is the difference between conduction ,convection and tadiatic

Discussion

1379.	In diagram an object o is at distance 10cm above the water level water column in beaker is of 12cm which is kept on a plane mirror if refractive index of water is 4/3 then the distance d behind the mirror where image is formed is
Answer» In diagram an object o is at distance 10cm above the water level water column in beaker is of 12cm which is kept on a plane mirror if refractive index of water is 4/3 then the distance d behind the mirror where image is formed is

Discussion

1380.	so does it mean that as long as a force is applied to a rolling sphere its friction will be in the same direction as that of the direction of motion?
Answer» so does it mean that as long as a force is applied to a rolling sphere its friction will be in the same direction as that of the direction of motion?

Discussion

1381.	Which of the following is correct with regard to a closed circuit consisting a cell, bulb and switch in series.
Answer» Which of the following is correct with regard to a closed circuit consisting a cell, bulb and switch in series.

Discussion

1382.	Where to use w=f.s and w=rf
Answer» Where to use w=f.s and w=rf

Discussion

1383.	Take a tin can with a lid and fill it half with water. Heat the can on a candle flame till water boils. Let it boil for a few minutes and immediately put the lid tightly on the can. Pour fresh water over the can. You can see a shape change for the tin box. What is the reason for the change in shape?
Answer» Take a tin can with a lid and fill it half with water. Heat the can on a candle flame till water boils. Let it boil for a few minutes and immediately put the lid tightly on the can. Pour fresh water over the can. You can see a shape change for the tin box. What is the reason for the change in shape?

Discussion

1384.	On what principle does Electromagnet work?
Answer» On what principle does Electromagnet work?

1384.

On what principle does Electromagnet work?

Answer»

On what principle does Electromagnet work?

Discussion

1385.	82 Two springs A and B having spring constant Kand Kg (K 2K) are stretched by applying forceof equal magnitude. If energy stored in spring A isthen energy stored in B will beEA(2)(1) 2EEA(3) 2(4) 4E
Answer» 82 Two springs A and B having spring constant Kand Kg (K 2K) are stretched by applying forceof equal magnitude. If energy stored in spring A isthen energy stored in B will beEA(2)(1) 2EEA(3) 2(4) 4E

Discussion

1386.	Two metal spheres of the same material have radii r and 2r and they emit thermal radiation with maximum intensities at wavelengths λ and 2λ respectively. The respective ratio of the radiant energy emitted by them per second will be
Answer» Two metal spheres of the same material have radii $r$ and $2 r$ and they emit thermal radiation with maximum intensities at wavelengths $λ$ and $2 λ$ respectively. The respective ratio of the radiant energy emitted by them per second will be

Discussion

1387.	112.In an oscillating system, the restoring force is a must. In an LC circuit, restoring force is provided by 1) capacitor 2) inductance 3) resistance 4) both 1) and 2)
Answer» 112.In an oscillating system, the restoring force is a must. In an LC circuit, restoring force is provided by 1) capacitor 2) inductance 3) resistance 4) both 1) and 2)

Discussion

1388.	Write answers the following questions.(a) Why does an object cast a shadow on a screen?(b) What is the connection between the formation of shadows and the propagation of light?(c) Explain what is meant by umbra and penumbra with the help of diagrams.(d) When does a solar eclipse take place?
Answer» Write answers the following questions. (a) Why does an object cast a shadow on a screen? (b) What is the connection between the formation of shadows and the propagation of light? (c) Explain what is meant by umbra and penumbra with the help of diagrams. (d) When does a solar eclipse take place?

1388.

Write answers the following questions.(a) Why does an object cast a shadow on a screen?(b) What is the connection between the formation of shadows and the propagation of light?(c) Explain what is meant by umbra and penumbra with the help of diagrams.(d) When does a solar eclipse take place?

Answer»

Write answers the following questions.

(a) Why does an object cast a shadow on a screen?

(b) What is the connection between the formation of shadows and the propagation of light?

(c) Explain what is meant by umbra and penumbra with the help of diagrams.

(d) When does a solar eclipse take place?

Discussion

1389.	Definition of Joule
Answer» Definition of Joule

Discussion

1390.	to a stationary man rain is falling on his back with a velocity 6km/hr at an angle 30^0 with verticl .to make te rain velocity appear vertical the man should move 1)forward with a velocity 3km/hr HOW?
Answer» to a stationary man rain is falling on his back with a velocity 6km/hr at an angle 30^0 with verticl .to make te rain velocity appear vertical the man should move 1)forward with a velocity 3km/hr HOW?

Discussion

1391.	Can friction be eliminated completely? Explain.
Answer» Can friction be eliminated completely? Explain.

Discussion

1392.	Lightning occurs due to:
Answer» Lightning occurs due to:

Discussion

1393.	Given at 350K PA^{0 = }300torr &PB^0 =800torr ,the composition of mixture having a normal Boiling point of 350K IS X_{A=0.08 } 0.06 0.04 0.02
Answer» Given at 350K PA^{0 = }300torr &PB^0 =800torr ,the composition of mixture having a normal Boiling point of 350K IS X_{A=0.08 } 0.06 0.04 0.02

Discussion

1394.	At the time of short circuit, the current in the circuit :
Answer» At the time of short circuit, the current in the circuit :

Discussion

1395.	Phases of moon are observed because:
Answer» Phases of moon are observed because:

Discussion

1396.	if l is length of the bar magnet then the separation between the two poles is nearly
Answer» if l is length of the bar magnet then the separation between the two poles is nearly

Discussion

1397.	Carlos is practicing dance steps in front of a mirror. He suddenly realizes that the text 'PERFECT' on his T-shirt looks different in the mirror. Which of the following resembles the text in the mirror?
Answer» Carlos is practicing dance steps in front of a mirror. He suddenly realizes that the text 'PERFECT' on his T-shirt looks different in the mirror. Which of the following resembles the text in the mirror?

Discussion

1398.	An organ pipe closed at one end has a fundamental frequency of 1500 Hz. The minimum number of overtones generated by this pipe which a normal person can hear is
Answer» An organ pipe closed at one end has a fundamental frequency of $1500 Hz$ . The minimum number of overtones generated by this pipe which a normal person can hear is

Discussion

1399.	The velocity of a car is 18 ms. Express this velocity in kmh.
Answer» The velocity of a car is $18 \frac{m}{s}$ . Express this velocity in $\frac{k m}{h}$ .

Discussion

1400.	A man eats glucose and makes a block move, which then comes to rest after sliding on a rough floor. The correct order of energy changes can be:
Answer» A man eats glucose and makes a block move, which then comes to rest after sliding on a rough floor. The correct order of energy changes can be:

Discussion

Explore topic-wise InterviewSolutions in .

a mirror is inclined at an angle θ with the horizontal.if ray of light is incident at an angle θ,then the reflected raymake the angle with horizontal

A beam of light falls on a smooth wall. Will you observe regular reflection or diffused reflection from the wall?

If 'i' represents the angle of incidence and 'r' represents the angle of reflection, then which of the following option(s) is true?

If we put a green leaf under a red light what colour will it appear?

A three phase supply is used when the power load exceeds ___ watt.

A plane mirror is placed at a distance of 12.5 cm from the focus of a concave mirror of radius of curvature 20 cm. Find where an object can be placed between the two mirrors, so that the first image in both the mirrors coincide.

All kinds of ways an image can be formed by concave and convex lens

charge of silicon in orthosilicate and pyrosilicate

Explain hamiliton operator and schrodinger wave equation

Metal cap of an electric cell is__________.

Why is it always the bulb of the thermometer that breaks?

What is thermal equilibrium? How are the temperature of the two bodies which are in thermal equillibrium related to each other?

The % error in MEASUREMENT of a PHYSICAL quantity m, given by m=pie tanA is minimum when1. A=45°2. A=30°3. A=90°4. A=60°

A object changing its position with respect to a reference body with time is ____ with respect to the body.

If the temperature of a uniform rod is slightly increased by At, its moment of inertia I about a line parallel to itself will increase by )(a) zero (b) (c) 2 (d) 3alM.

A mass m moving horizonatally ( along the X-axix) with velocity V-collides and sticks to mass of 3 m moving vertically upward (along with y-axis) with velocity 2v. The final velocity of the combination is ?

A hot body placed in air is cooled down according to Newton’s law of cooling, the rate of decrease of temperature being k times the temperature difference from the surrounding. Starting from t=0, the time in which the body will lose half the maximum heat it can lose is lnak. Find the value of a.

Write answers to the following questions.(a) Give a simple experiment to show that a medium is necessary for the propagation of sound.(b) How is sound produced in drums?(c) What is noise?

65. the ratio of diameters of 2 wires of same material is n:1.the length of each wire is 4 m.on applying the same load increase in length of thin wire will be

What is thermal conductivity?

Is it important or will be benificial to learn the all SI base unit defination

Question 7ABCD is a rhombus. Show that diagonal AC bisects ∠A as well as ∠C and diagonal BD bisects ∠B as well as ∠D.

A person goes from A to B at a speed of 40 m s−1 and comes back from B to A at a speed of 60 m s−1. What is his average speed?

Select an appropriate verb in the past tense for the blank. The trainees ______ the wrong building.

When the reflected rays from an object appear to meet at a point. The image formed will be:

What is the difference between conduction ,convection and tadiatic

In diagram an object o is at distance 10cm above the water level water column in beaker is of 12cm which is kept on a plane mirror if refractive index of water is 4/3 then the distance d behind the mirror where image is formed is

so does it mean that as long as a force is applied to a rolling sphere its friction will be in the same direction as that of the direction of motion?

Which of the following is correct with regard to a closed circuit consisting a cell, bulb and switch in series.

Where to use w=f.s and w=rf

On what principle does Electromagnet work?

82 Two springs A and B having spring constant Kand Kg (K 2K) are stretched by applying forceof equal magnitude. If energy stored in spring A isthen energy stored in B will beEA(2)(1) 2EEA(3) 2(4) 4E

Two metal spheres of the same material have radii r and 2r and they emit thermal radiation with maximum intensities at wavelengths λ and 2λ respectively. The respective ratio of the radiant energy emitted by them per second will be

112.In an oscillating system, the restoring force is a must. In an LC circuit, restoring force is provided by 1) capacitor 2) inductance 3) resistance 4) both 1) and 2)

Write answers the following questions.(a) Why does an object cast a shadow on a screen?(b) What is the connection between the formation of shadows and the propagation of light?(c) Explain what is meant by umbra and penumbra with the help of diagrams.(d) When does a solar eclipse take place?

Definition of Joule

to a stationary man rain is falling on his back with a velocity 6km/hr at an angle 30^0 with verticl .to make te rain velocity appear vertical the man should move 1)forward with a velocity 3km/hr HOW?

Can friction be eliminated completely? Explain.

Lightning occurs due to:

Given at 350K PA^{0 = }300torr &PB^0 =800torr ,the composition of mixture having a normal Boiling point of 350K IS X_{A=0.08 } 0.06 0.04 0.02

At the time of short circuit, the current in the circuit :

Phases of moon are observed because:

if l is length of the bar magnet then the separation between the two poles is nearly

Carlos is practicing dance steps in front of a mirror. He suddenly realizes that the text 'PERFECT' on his T-shirt looks different in the mirror. Which of the following resembles the text in the mirror?

An organ pipe closed at one end has a fundamental frequency of 1500 Hz. The minimum number of overtones generated by this pipe which a normal person can hear is

The velocity of a car is 18 ms. Express this velocity in kmh.

A man eats glucose and makes a block move, which then comes to rest after sliding on a rough floor. The correct order of energy changes can be: