16569 + Interview Questions in Physics

1.	Calculate the amount of force P which will just lift the total weight of 200 N acting on the wheelbarrow as shown in figure.
Answer» Calculate the amount of force P which will just lift the total weight of 200 N acting on the wheelbarrow as shown in figure.

1.

Calculate the amount of force P which will just lift the total weight of 200 N acting on the wheelbarrow as shown in figure.

Answer»

Calculate the amount of force P which will just lift the total weight of 200 N acting on the wheelbarrow as shown in figure.

Discussion

2.	Describe the layers of the forest in detail.
Answer» Describe the layers of the forest in detail.

Discussion

3.	Electric supply of a house is through a 10 A fuse. When a 2000 W heater is used in this house, how many 100 W bulbs can be used simultaneously? The supply is at 220 V, and the heater and the bulbs are rated for 220 V.
Answer» Electric supply of a house is through a $10 A$ fuse. When a $2000 W$ heater is used in this house, how many $100 W$ bulbs can be used simultaneously? The supply is at $220 V$ , and the heater and the bulbs are rated for $220 V$ .

Discussion

4.	State Fleming's left-hand rule. Explain it with the help of labeled diagrams.
Answer» State Fleming's left-hand rule. Explain it with the help of labeled diagrams.

Discussion

5.	Question 2An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.
Answer» Question 2 An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.

Discussion

6.	What is the orientation of a current carrying conductor relative to the direction of a magnetic field for: (a) Maximum magnetic force (b) Minimum magnetic force
Answer» What is the orientation of a current carrying conductor relative to the direction of a magnetic field for: (a) Maximum magnetic force (b) Minimum magnetic force

Discussion

7.	in an apparatus E=21V/m then oscillating magnetic field is
Answer» in an apparatus E=21V/m then oscillating magnetic field is

Discussion

8.	A uniform metre rule of mass 100gf is balanced on a fulcrum at mark 40cm by suspending an unknown mass m at the mark 20 cm. (I) Find the value of m. (II) To which side the rule will tilt if the mass m is moved to the 10 cm mark? (III) What is the resultant moment now? (IIII) How can it be balanced by another mass of 50 g?
Answer» A uniform metre rule of mass 100gf is balanced on a fulcrum at mark 40cm by suspending an unknown mass m at the mark 20 cm. (I) Find the value of m. (II) To which side the rule will tilt if the mass m is moved to the 10 cm mark? (III) What is the resultant moment now? (IIII) How can it be balanced by another mass of 50 g?

8.

A uniform metre rule of mass 100gf is balanced on a fulcrum at mark 40cm by suspending an unknown mass m at the mark 20 cm. (I) Find the value of m. (II) To which side the rule will tilt if the mass m is moved to the 10 cm mark? (III) What is the resultant moment now? (IIII) How can it be balanced by another mass of 50 g?

Answer»

A uniform metre rule of mass 100gf is balanced on a fulcrum at mark 40cm by suspending an unknown mass m at the mark 20 cm.

(I) Find the value of m.

(II) To which side the rule will tilt if the mass m is moved to the 10 cm mark?

(III) What is the resultant moment now?

(IIII) How can it be balanced by another mass of 50 g?

Discussion

9.	What is the correct form of Newton’s second law of motion?
Answer» What is the correct form of Newton’s second law of motion?

Discussion

10.	What is common among the following images?
Answer» What is common among the following images?

Discussion

11.	The equivalent circuit of a 250/2500 V transformer referred to the low voltage side is given below:A load of (350+j210) Ω is connected. For a primary side input voltage of 250 V, the input power factor is _______0.81
Answer» The equivalent circuit of a 250/2500 V transformer referred to the low voltage side is given below: A load of $(350 + j 210) Ω$ is connected. For a primary side input voltage of 250 V, the input power factor is _______ 0.81

Discussion

12.	29. A particle is projected with initial velocity v equal to 2i+3j initially in xy plane. (Where X is taken horizontal and y is vertical). The equation of trajectory of the particle will be (g=-10m/s2)
Answer» 29. A particle is projected with initial velocity v equal to 2i+3j initially in xy plane. (Where X is taken horizontal and y is vertical). The equation of trajectory of the particle will be (g=-10m/s2)

Discussion

13.	Write the word AMBULANCE as it would appear when reflected in a plane mirror. Why is it sometimes written in this way (as its mirror image) on the front of an ambulance ?
Answer» Write the word AMBULANCE as it would appear when reflected in a plane mirror. Why is it sometimes written in this way (as its mirror image) on the front of an ambulance ?

Discussion

14.	If a person is reading a novel, then his ciliary muscles___.
Answer» If a person is reading a novel, then his ciliary muscles___.

Discussion

15.	Which of the following graphs correctly represents the variation of angle of deviation (δ) versus angle of incidence (i) for a light ray travelling from a denser to rarer medium?
Answer» Which of the following graphs correctly represents the variation of angle of deviation $(δ)$ versus angle of incidence $(i)$ for a light ray travelling from a denser to rarer medium?

Discussion

16.	find the expression for a round object to roll over the inclined plane and hence find the condition for coefficient of friction
Answer» find the expression for a round object to roll over the inclined plane and hence find the condition for coefficient of friction

Discussion

17.	Which unit is used to express reactance in conductors and capacitors?
Answer» Which unit is used to express reactance in conductors and capacitors?

Discussion

18.	Question 17Which of the following ray diagram is correct for the ray of light incident on a lens as shown in figure 1?(a) Fig. A.(b) Fig. B.(c) Fig. C.(d) Fig. D.
Answer» Question 17 Which of the following ray diagram is correct for the ray of light incident on a lens as shown in figure 1? (a) Fig. A. (b) Fig. B. (c) Fig. C. (d) Fig. D.

Discussion

19.	Explain the use of coal and its products. [5 MARKS]
Answer» Explain the use of coal and its products. [5 MARKS]

Discussion

20.	a long horizontal rod with length along north-south direction falls under gravity. the potential diff across two ends is (inclide earths field) a)be zero b)be cons†an t c)increase with time d)decrease woth tim
Answer» a long horizontal rod with length along north-south direction falls under gravity. the potential diff across two ends is (inclide earths field) a)be zero b)be cons†an t c)increase with time d)decrease woth tim

Discussion

21.	The percentage of methane in natural gas is_____.
Answer» The percentage of methane in natural gas is_____.

Discussion

22.	Question 4Why do you think there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?
Answer» Question 4 Why do you think there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?

Discussion

23.	Prateek's mother decided to cook food in a solar cooker but she found that food cannot be cooked in that solar cooker. What might be the reason for the same?
Answer» Prateek's mother decided to cook food in a solar cooker but she found that food cannot be cooked in that solar cooker. What might be the reason for the same?

Discussion

24.	Two lamps, one rated 40 W at 220 V and the other 60 W at 220 V, are connected in parallel to the electric supply at 220 V.(a) Draw a circuit diagram to show the connections.(b) Calculate the current drawn from the electric supply.(c) Calculate the total energy consumed by the two lamps together when they operate for one hour.
Answer» Two lamps, one rated 40 W at 220 V and the other 60 W at 220 V, are connected in parallel to the electric supply at 220 V. (a) Draw a circuit diagram to show the connections. (b) Calculate the current drawn from the electric supply. (c) Calculate the total energy consumed by the two lamps together when they operate for one hour.

Discussion

25.	In the case of a rectangular or a square lamina, what is the location of the center of gravity?
Answer» In the case of a rectangular or a square lamina, what is the location of the center of gravity?

Discussion

26.	A particle of mass 1 kg was sliding with a velocity of 10 m/s on a rough floor. It comes to rest after 5 s. Find the power at which energy is dissipated due to frictional force.
Answer» A particle of mass 1 kg was sliding with a velocity of 10 m/s on a rough floor. It comes to rest after 5 s. Find the power at which energy is dissipated due to frictional force.

Discussion

27.	A naturally occurring magnet that can attract iron and other substances which have magnetic properties is called as a ___ .
Answer» A naturally occurring magnet that can attract iron and other substances which have magnetic properties is called as a ___ .

Discussion

28.	if attach voltmeter in series and found ammeter reading is always showing zero explain
Answer» if attach voltmeter in series and found ammeter reading is always showing zero explain

Discussion

29.	Derik recently found that electricity is the movement of electrons in the wire and he already know that everything is made up of atoms but he couldn't understand how this process can give off light like in case of a bulb how will you explain it to him at the atomic scale
Answer» Derik recently found that electricity is the movement of electrons in the wire and he already know that everything is made up of atoms but he couldn't understand how this process can give off light like in case of a bulb how will you explain it to him at the atomic scale

Discussion

30.	A wire of resistance 12 Ω is cut into three identical parts. Each part is now stretched to double its length. Now resistance of each part will be
Answer» A wire of resistance 12 Ω is cut into three identical parts. Each part is now stretched to double its length. Now resistance of each part will be

Discussion

31.	Let P represent radiation pressure, c represent speed of light and I represent radiation energy striking a unit area per second, then P^xI^yc^{z } will be dimensionless for 1) x=0, y=z 2)x=y=z 3)x=z=-y
Answer» Let P represent radiation pressure, c represent speed of light and I represent radiation energy striking a unit area per second, then P^xI^yc^{z } will be dimensionless for 1) x=0, y=z 2)x=y=z 3)x=z=-y

Discussion

32.	How much positive or negative charge is there in a cup of water?
Answer» How much positive or negative charge is there in a cup of water?

Discussion

33.	State the factor on which the position of center of gravity of a body depends on. Explain using an example
Answer» State the factor on which the position of center of gravity of a body depends on. Explain using an example

Discussion

34.	A tuning fork gives 5 beats with another tuning fork of frequency 100 Hz. When the first tuning fork is loaded with wax, then the number of beats remains unchanged, then what will be the frequency of the first tuning fork [MP PMT 1985]
Answer» A tuning fork gives 5 beats with another tuning fork of frequency 100 Hz. When the first tuning fork is loaded with wax, then the number of beats remains unchanged, then what will be the frequency of the first tuning fork [MP PMT 1985]

34.

A tuning fork gives 5 beats with another tuning fork of frequency 100 Hz. When the first tuning fork is loaded with wax, then the number of beats remains unchanged, then what will be the frequency of the first tuning fork [MP PMT 1985]

Answer»

A tuning fork gives 5 beats with another tuning fork of frequency 100 Hz.

When the first tuning fork is loaded with wax, then the number of beats

remains unchanged, then what will be the frequency of the first tuning fork

[MP PMT 1985]

Discussion

35.	difference between gravity and gravitational G AND g
Answer» difference between gravity and gravitational G AND g

Discussion

36.	Why does a small rotation of the coil produce a torque which brings it back to its original when magnetic moment and magnetic field are parallel to each other whereas the opposite happens when they're antiparallel to each other.
Answer» Why does a small rotation of the coil produce a torque which brings it back to its original when magnetic moment and magnetic field are parallel to each other whereas the opposite happens when they're antiparallel to each other.

Discussion

37.	6. Explain Spontaneity
Answer» 6. Explain Spontaneity

Discussion

38.	An object is placed 10 cm from a diverging lens which forms an image 6.5 cm from the lens. What is the focal length of the lens?
Answer» An object is placed 10 cm from a diverging lens which forms an image 6.5 cm from the lens. What is the focal length of the lens?

Discussion

39.	A magnetic dipole of dipole moment M is placed in a mutually perpendicular uniform magnetic field B1 and B2 respectively. If the magnetic dipole comes to stable equilibrium at an angle 30∘ with B1. Find the magnitude of B2 ?[B1=3×10−5 T]
Answer» A magnetic dipole of dipole moment $M$ is placed in a mutually perpendicular uniform magnetic field $B_{1}$ and $B_{2}$ respectively. If the magnetic dipole comes to stable equilibrium at an angle $30^{\circ}$ with $B_{1}$ . Find the magnitude of $B_{2}$ ? $[B_{1} = 3 \times 10^{- 5} T]$

Discussion

40.	The electric field associated with an electromagnetic wave in vacuum is given by E=i40 co(kz-6 x 10^8t), where E, z and t are in volt/m, metre and second respectively. The value of wave vector k is?
Answer» The electric field associated with an electromagnetic wave in vacuum is given by E=i40 co(kz-6 x 10^8t), where E, z and t are in volt/m, metre and second respectively. The value of wave vector k is?

Discussion

41.	For refraction of light form air to rock salt, water and diamond if:V-Velocity of light in airVI - Velocity of light in rock saltV2 - Velocity of light in waterV3 - Velocity of light in diamond, thenChoose the correct alternativea) V> Vi> V2V_b) V>V2 > V, > Vc) V >V1> V2> V3d) V,>V>V3> VWhen light is refracted into a medium
Answer» For refraction of light form air to rock salt, water and diamond if:V-Velocity of light in airVI - Velocity of light in rock saltV2 - Velocity of light in waterV3 - Velocity of light in diamond, thenChoose the correct alternativea) V> Vi> V2V_b) V>V2 > V, > Vc) V >V1> V2> V3d) V,>V>V3> VWhen light is refracted into a medium

Discussion

42.	India receives 5000 trillion KWH / year which means______________________
Answer» India receives 5000 trillion KWH / year which means______________________

Discussion

43.	Light is incident on a glass surface at polarizing angle of 57.5∘. Then the angle between the incident ray and the refracted ray is,
Answer» Light is incident on a glass surface at polarizing angle of ${57.5}^{\circ}$ . Then the angle between the incident ray and the refracted ray is,

Discussion

44.	In the following figure, grade the bulb in order of their brightness.
Answer» In the following figure, grade the bulb in order of their brightness.

Discussion

45.	A 10 D lens is used as a magnifier, where should the object be placed to obtain maximum angular magnification for a normal eye? (near point =25 cm)
Answer» A $10 D$ lens is used as a magnifier, where should the object be placed to obtain maximum angular magnification for a normal eye? (near point $= 25 cm$ )

Discussion

46.	A proton beam enters a magnetic field of 10−4 Wb m−2 normally. If the specific charge of the proton is 1011 C kg−1 and its velocity is 109ms−1, then the radius of the circle described will be
Answer» A proton beam enters a magnetic field of 10 $^{- 4}$ Wb $m^{- 2}$ normally. If the specific charge of the proton is $10^{11}$ C $k g^{- 1}$ and its velocity is $10^{9} m s^{- 1}$ , then the radius of the circle described will be

Discussion

47.	What does this mean 'isotropy of space underlies the law of conservation of angular momentum'?
Answer» What does this mean 'isotropy of space underlies the law of conservation of angular momentum'?

Discussion

48.	4. 12 capacitors of capacitances 1 microfarad each are arranged along the edge of circle . The equivalent capacitance along the diagonal of the cube is
Answer» 4. 12 capacitors of capacitances 1 microfarad each are arranged along the edge of circle . The equivalent capacitance along the diagonal of the cube is

Discussion

49.	In a certain gas, the ratio of the velocity of sound and root mean square velocity of gas molecules is √59. If the gas obeys polytopic process PT= constant, then the molar heat capacity of the gas is(where R= universal gas constant)
Answer» In a certain gas, the ratio of the velocity of sound and root mean square velocity of gas molecules is $\sqrt{\frac{5}{9}}$ . If the gas obeys polytopic process $P T =$ constant, then the molar heat capacity of the gas is (where $R =$ universal gas constant)

Discussion

50.	What is the far point of a person suffering from myopia (or long-sightedness) ?
Answer» What is the far point of a person suffering from myopia (or long-sightedness) ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Calculate the amount of force P which will just lift the total weight of 200 N acting on the wheelbarrow as shown in figure.

Describe the layers of the forest in detail.

Electric supply of a house is through a 10 A fuse. When a 2000 W heater is used in this house, how many 100 W bulbs can be used simultaneously? The supply is at 220 V, and the heater and the bulbs are rated for 220 V.

State Fleming's left-hand rule. Explain it with the help of labeled diagrams.

Question 2An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.

What is the orientation of a current carrying conductor relative to the direction of a magnetic field for: (a) Maximum magnetic force (b) Minimum magnetic force

in an apparatus E=21V/m then oscillating magnetic field is

What is the correct form of Newton’s second law of motion?

What is common among the following images?

The equivalent circuit of a 250/2500 V transformer referred to the low voltage side is given below:A load of (350+j210) Ω is connected. For a primary side input voltage of 250 V, the input power factor is _______0.81

29. A particle is projected with initial velocity v equal to 2i+3j initially in xy plane. (Where X is taken horizontal and y is vertical). The equation of trajectory of the particle will be (g=-10m/s2)

Write the word AMBULANCE as it would appear when reflected in a plane mirror. Why is it sometimes written in this way (as its mirror image) on the front of an ambulance ?

If a person is reading a novel, then his ciliary muscles___.

Which of the following graphs correctly represents the variation of angle of deviation (δ) versus angle of incidence (i) for a light ray travelling from a denser to rarer medium?

find the expression for a round object to roll over the inclined plane and hence find the condition for coefficient of friction

Which unit is used to express reactance in conductors and capacitors?

Question 17Which of the following ray diagram is correct for the ray of light incident on a lens as shown in figure 1?(a) Fig. A.(b) Fig. B.(c) Fig. C.(d) Fig. D.

Explain the use of coal and its products. [5 MARKS]

a long horizontal rod with length along north-south direction falls under gravity. the potential diff across two ends is (inclide earths field) a)be zero b)be cons†an t c)increase with time d)decrease woth tim

The percentage of methane in natural gas is_____.

Question 4Why do you think there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?

Prateek's mother decided to cook food in a solar cooker but she found that food cannot be cooked in that solar cooker. What might be the reason for the same?

In the case of a rectangular or a square lamina, what is the location of the center of gravity?

A particle of mass 1 kg was sliding with a velocity of 10 m/s on a rough floor. It comes to rest after 5 s. Find the power at which energy is dissipated due to frictional force.

A naturally occurring magnet that can attract iron and other substances which have magnetic properties is called as a ___ .

if attach voltmeter in series and found ammeter reading is always showing zero explain

Derik recently found that electricity is the movement of electrons in the wire and he already know that everything is made up of atoms but he couldn't understand how this process can give off light like in case of a bulb how will you explain it to him at the atomic scale

A wire of resistance 12 Ω is cut into three identical parts. Each part is now stretched to double its length. Now resistance of each part will be

Let P represent radiation pressure, c represent speed of light and I represent radiation energy striking a unit area per second, then P^xI^yc^{z } will be dimensionless for 1) x=0, y=z 2)x=y=z 3)x=z=-y

How much positive or negative charge is there in a cup of water?

State the factor on which the position of center of gravity of a body depends on. Explain using an example

A tuning fork gives 5 beats with another tuning fork of frequency 100 Hz. When the first tuning fork is loaded with wax, then the number of beats remains unchanged, then what will be the frequency of the first tuning fork [MP PMT 1985]

difference between gravity and gravitational G AND g

Why does a small rotation of the coil produce a torque which brings it back to its original when magnetic moment and magnetic field are parallel to each other whereas the opposite happens when they're antiparallel to each other.

6. Explain Spontaneity

An object is placed 10 cm from a diverging lens which forms an image 6.5 cm from the lens. What is the focal length of the lens?

A magnetic dipole of dipole moment M is placed in a mutually perpendicular uniform magnetic field B1 and B2 respectively. If the magnetic dipole comes to stable equilibrium at an angle 30∘ with B1. Find the magnitude of B2 ?[B1=3×10−5 T]

The electric field associated with an electromagnetic wave in vacuum is given by E=i40 co(kz-6 x 10^8t), where E, z and t are in volt/m, metre and second respectively. The value of wave vector k is?

India receives 5000 trillion KWH / year which means______________________

Light is incident on a glass surface at polarizing angle of 57.5∘. Then the angle between the incident ray and the refracted ray is,

In the following figure, grade the bulb in order of their brightness.

A 10 D lens is used as a magnifier, where should the object be placed to obtain maximum angular magnification for a normal eye? (near point =25 cm)

A proton beam enters a magnetic field of 10−4 Wb m−2 normally. If the specific charge of the proton is 1011 C kg−1 and its velocity is 109ms−1, then the radius of the circle described will be

What does this mean 'isotropy of space underlies the law of conservation of angular momentum'?

4. 12 capacitors of capacitances 1 microfarad each are arranged along the edge of circle . The equivalent capacitance along the diagonal of the cube is

In a certain gas, the ratio of the velocity of sound and root mean square velocity of gas molecules is √59. If the gas obeys polytopic process PT= constant, then the molar heat capacity of the gas is(where R= universal gas constant)

What is the far point of a person suffering from myopia (or long-sightedness) ?