16569 + Interview Questions in Physics

1.	A satellite of mass m is in orbit round the earth at a distance of 2.5 R above its surface. If gravitational field strength at surface of earth is g.calculate centripetal force acting on satellite
Answer» A satellite of mass m is in orbit round the earth at a distance of 2.5 R above its surface. If gravitational field strength at surface of earth is g.calculate centripetal force acting on satellite

Discussion

2.	Gradual weakening of ciliary muscles with age causes:
Answer» Gradual weakening of ciliary muscles with age causes:

Discussion

3.	A uniform string of mass m hangs vertically from a rigid support. A wave pulse is sent from it's free end towards the fixed end . As the wave pulse moves upward
Answer» A uniform string of mass m hangs vertically from a rigid support. A wave pulse is sent from it's free end towards the fixed end . As the wave pulse moves upward

Discussion

4.	What is the specific conductance of 0.1 M HA solution, if λ∞(HA)=250 Ω−1cm2mol−1 and the dissociation constant Ka of HA is 2.25×10−5? (Assume α<<1)
Answer» What is the specific conductance of 0.1 M HA solution, if $λ^{\infty} (H A) = 250 Ω^{- 1} c m^{2} m o l^{- 1}$ and the dissociation constant $K_{a}$ of HA is $2.25 \times 10^{- 5}$ ? (Assume $α << 1)$

Discussion

5.	The Nyquist sampling rate for the signal m(t)=sin(600πt).cos(800πt)πt is ________kHz.1.4
Answer» The Nyquist sampling rate for the signal $m (t) = \frac{sin (600 π t) . cos (800 π t)}{π t}$ is ________kHz. 1.4

Discussion

6.	Find the work done to transfer 1019 electrons from point A to B which are maintained at a potential diffrence of 5 volts.
Answer» Find the work done to transfer $10^{19}$ electrons from point A to B which are maintained at a potential diffrence of 5 volts.

Discussion

7.	white light is passed through a prism of angle 10 degree. If the refractive index for red and violet colours are 1.641 and 1.659 respectively, then find the- (a) angles of deviation for violet and red colours.
Answer» white light is passed through a prism of angle 10 degree. If the refractive index for red and violet colours are 1.641 and 1.659 respectively, then find the- (a) angles of deviation for violet and red colours.

Discussion

8.	Mention the different types of representation of functions.
Answer» Mention the different types of representation of functions.

Discussion

9.	A planer loop of wire rotates in a uniform magnetic field. Initially, at t=0, the plane of the loop is perpendicular to the magnetic field. If it rotates with a period of 10 s about an axis in its plane, then the magnitude of induced emf will be maximum and minimum, respectively at:
Answer» A planer loop of wire rotates in a uniform magnetic field. Initially, at $t = 0$ , the plane of the loop is perpendicular to the magnetic field. If it rotates with a period of $10 s$ about an axis in its plane, then the magnitude of induced emf will be maximum and minimum, respectively at:

Discussion

10.	Find the energy of H Atom in first excitation state. The value of premitivity factor 4pi epsilon Not Is given as 1.11264 10-10 C 2 N-1 m-2
Answer» Find the energy of H Atom in first excitation state. The value of premitivity factor 4pi epsilon Not Is given as 1.11264 10-10 C 2 N-1 m-2

Discussion

11.	Why was the frog angry?
Answer» Why was the frog angry?

Discussion

12.	19.A solenoid has 2000 turns wound over a length of 0.3 m. The area of its cross section is 1.2 × 10^–3 m^2. Around its central section a coil of 300 turns is wound. If an initial current of 2 A is reversed in 0.25 s, the e.m.f. induced in the coil is equal to
Answer» 19.A solenoid has 2000 turns wound over a length of 0.3 m. The area of its cross section is 1.2 × 10^–3 m^2. Around its central section a coil of 300 turns is wound. If an initial current of 2 A is reversed in 0.25 s, the e.m.f. induced in the coil is equal to

Discussion

13.	62.What is the relation between angle of incidence and lateral displacement in a glass slab?
Answer» 62.What is the relation between angle of incidence and lateral displacement in a glass slab?

Discussion

14.	69.How to determine the direction of magnetic dipole moment of a closed loop if current flow is clockwise direction in the loop ?
Answer» 69.How to determine the direction of magnetic dipole moment of a closed loop if current flow is clockwise direction in the loop ?

Discussion

15.	IN CASE OF SIMPLE AND COMPOUND MICROSCOPE WHY ALWAYS IMAGE SHOULD FORM AT DISTANCE OF LEAST VISION FOR EYE?? WHY WE PREFER FORMING IMAGE AT D IN MICROSCOPE
Answer» IN CASE OF SIMPLE AND COMPOUND MICROSCOPE WHY ALWAYS IMAGE SHOULD FORM AT DISTANCE OF LEAST VISION FOR EYE?? WHY WE PREFER FORMING IMAGE AT D IN MICROSCOPE

Discussion

16.	If the mass of one object is doubled and mass of other remains the same, moreover if the distance between them is halved then how does the gravitational force change?
Answer» If the mass of one object is doubled and mass of other remains the same, moreover if the distance between them is halved then how does the gravitational force change?

Discussion

17.	By adding some amount of ice, the temperature of 500g of water at 50∘C , is lowered to 0∘C. If the specific heat capacity of water is 4.2 J g−1 K−1 and specific specific latent heat of ice is 336 J g−1, then find the mass of ice added to it.
Answer» By adding some amount of ice, the temperature of 500g of water at $50^{\circ} C$ , is lowered to $0^{\circ} C$ . If the specific heat capacity of water is 4.2 J g⁻¹ K⁻¹and specific specific latent heat of ice is 336 J g⁻¹, then find the mass of ice added to it.

Discussion

18.	An object of mass 2 kg is sliding with a constant velocity of 4 ms−1 on a frictionless horizontal table. The force required to keep the object moving with the same velocity is:
Answer» An object of mass $2 k g$ is sliding with a constant velocity of $4 m s^{- 1}$ on a frictionless horizontal table. The force required to keep the object moving with the same velocity is:

Discussion

19.	The S.I. unit of heat capacity is : (a) J kg−1 (b) J K−1 (c) J kg−1 K−1 (d) cal∘C−1
Answer» The S.I. unit of heat capacity is : (a) J k $g^{- 1}$ (b) J $K^{- 1}$ (c) J k $g^{- 1} K^{- 1}$ (d) $c a l^{\circ} C^{- 1}$

19.

The S.I. unit of heat capacity is : (a) J kg−1 (b) J K−1 (c) J kg−1 K−1 (d) cal∘C−1

Answer»

The S.I. unit of heat capacity is :

(a) J k $g^{- 1}$ (b) J $K^{- 1}$

(c) J k $g^{- 1} K^{- 1}$ (d) $c a l^{\circ} C^{- 1}$

Discussion

20.	A guitar has Strings of different thickness
Answer» A guitar has Strings of different thickness

Discussion

21.	If you could use any source of energy for heating your food, which one would you use and why? [3 MARKS]
Answer» If you could use any source of energy for heating your food, which one would you use and why? [3 MARKS]

Discussion

22.	△ fH \lbrack SF6, g\rbrack = –1100 kJ/mole △ fH \lbrack S, g\rbrack = 275 kJ/mole △ fH \lbrack F, g\rbrack = 80 kJ/mole Find S-F bond energy in SF6(g) (1) 183.33 kJ/mole (2) 309.17 kJ/mole (3) 366.37 kJ/mole (4) 345 kJ/mole
Answer» △ fH \lbrack SF6, g\rbrack = –1100 kJ/mole △ fH \lbrack S, g\rbrack = 275 kJ/mole △ fH \lbrack F, g\rbrack = 80 kJ/mole Find S-F bond energy in SF6(g) (1) 183.33 kJ/mole (2) 309.17 kJ/mole (3) 366.37 kJ/mole (4) 345 kJ/mole

Discussion

23.	Which one of the following funcions represents the Clausius Clapeyron equation for the change of phase of a pure substance?
Answer» Which one of the following funcions represents the Clausius Clapeyron equation for the change of phase of a pure substance?

Discussion

24.	A Black Body radiates heat energy at the rate of2×10^5J/sm^2atatemperatureof127^° C.Thetemperatureof
Answer» A Black Body radiates heat energy at the rate of2×10^5J/sm^2atatemperatureof127^° C.Thetemperatureof

Discussion

25.	Why is the following image called a miniature?
Answer» Why is the following image called a miniature?

25.

Why is the following image called a miniature?

Answer»

Why is the following image called a miniature?

Discussion

26.	Analyse the given statements and choose the correct option. Statement 1 : Bending a wire does not affect the electrical resistance. Statement 2 : Resistance of a wire is proportional to resistivity of the material.
Answer» Analyse the given statements and choose the correct option. Statement 1 : Bending a wire does not affect the electrical resistance. Statement 2 : Resistance of a wire is proportional to resistivity of the material.

Discussion

27.	A train is moving towards east and the car is along North both with the same speed the observed direction of car to the passenger in the train is
Answer» A train is moving towards east and the car is along North both with the same speed the observed direction of car to the passenger in the train is

Discussion

28.	A L−R circuit is connected to a battery of constant EMF E. The switch is closed at time t=0. If Eind denotes the magnitude of induced EMF across inductor and i the current in the circuit at any time t. Then which of the following graph shows the variation of Eind with i?
Answer» A $L - R$ circuit is connected to a battery of constant EMF $E$ . The switch is closed at time $t = 0$ . If $E_{i n d}$ denotes the magnitude of induced EMF across inductor and $i$ the current in the circuit at any time $t$ . Then which of the following graph shows the variation of $E_{i n d}$ with $i$ ?

Discussion

29.	how to find junction temperature when two roads connecting in serie
Answer» how to find junction temperature when two roads connecting in serie

Discussion

30.	Electricity and magnetism are said to be inter-related to each other. A current carrying conductor has a magnetic field around it. So, when a compass is brought near to it, we can observe a deflection in the compass. Similarly, a battery is the source of the electric current. What will be the deflection, when we bring a compass near a 3 V cell (battery)?
Answer» Electricity and magnetism are said to be inter-related to each other. A current carrying conductor has a magnetic field around it. So, when a compass is brought near to it, we can observe a deflection in the compass. Similarly, a battery is the source of the electric current. What will be the deflection, when we bring a compass near a 3 V cell (battery)?

Discussion

31.	Select the correct lens formula where u, v, f have standard meanings.
Answer» Select the correct lens formula where $u, v, f$ have standard meanings.

Discussion

32.	The average kinetic energy of body in one complete oscillation with respect to position is \lbrack where ω is angular frequency, A is amplitude and m is mass of oscillating body\rbrack
Answer» The average kinetic energy of body in one complete oscillation with respect to position is \lbrack where ω is angular frequency, A is amplitude and m is mass of oscillating body\rbrack

Discussion

33.	4.Whose resistance 10 ohm 5ohm,7 ohm and 3 ohm are connected so that they form the side of a rectangle AB,BC,CD and DA respectively. Another resistance of 10 ohm is connected across the diagonal AC .The equivalent resistance between A and B is
Answer» 4.Whose resistance 10 ohm 5ohm,7 ohm and 3 ohm are connected so that they form the side of a rectangle AB,BC,CD and DA respectively. Another resistance of 10 ohm is connected across the diagonal AC .The equivalent resistance between A and B is

Discussion

34.	How do scientists utilise the information about fossils?
Answer» How do scientists utilise the information about fossils?

Discussion

35.	A light ray incident at an angle of incidence i passes an equilateral glass prism such that the refracted ray inside the prism is parallel to its base and emerges at an angle of emergence 'e'. Then
Answer» A light ray incident at an angle of incidence i passes an equilateral glass prism such that the refracted ray inside the prism is parallel to its base and emerges at an angle of emergence 'e'. Then

Discussion

36.	Q8. Consider the following statements: 1. The Indian Regional Navigational Satellite System (IRNSS) is a regional satellite navigation system. 2. IRNSS was renamed Navigation Indian Constellation (NAVIC). 3. IRNSS will be an independent and autonomous regional navigation system aiming a service area of about 1500 kilometers around India. Which of the above statements are correct?
Answer» Q8. Consider the following statements: 1. The Indian Regional Navigational Satellite System (IRNSS) is a regional satellite navigation system. 2. IRNSS was renamed Navigation Indian Constellation (NAVIC). 3. IRNSS will be an independent and autonomous regional navigation system aiming a service area of about 1500 kilometers around India. Which of the above statements are correct?

36.

Q8. Consider the following statements: 1. The Indian Regional Navigational Satellite System (IRNSS) is a regional satellite navigation system. 2. IRNSS was renamed Navigation Indian Constellation (NAVIC). 3. IRNSS will be an independent and autonomous regional navigation system aiming a service area of about 1500 kilometers around India. Which of the above statements are correct?

Answer»

Q8. Consider the following statements:

1. The Indian Regional Navigational Satellite System (IRNSS) is a regional satellite navigation system.

2. IRNSS was renamed Navigation Indian Constellation (NAVIC).

3. IRNSS will be an independent and autonomous regional navigation system aiming a service area of about 1500 kilometers around India.

Which of the above statements are correct?

Discussion

37.	In a uniform circular motion the linear speed is constant but there is acceleration because the velocity is changing all the time. This statement is
Answer» In a uniform circular motion the linear speed is constant but there is acceleration because the velocity is changing all the time. This statement is

Discussion

38.	What is WaveNumber?
Answer» What is WaveNumber?

Discussion

39.	20. A charged particle of charge q is moving in a circle of radius R with a uniform speed v. The associated magnetic moment () is given by
Answer» 20. A charged particle of charge q is moving in a circle of radius R with a uniform speed v. The associated magnetic moment () is given by

Discussion

40.	How to find electric field or potential at an equatorial point of a ring.
Answer» How to find electric field or potential at an equatorial point of a ring.

Discussion

41.	What is difference between the reducing end and non -reducing end?
Answer» What is difference between the reducing end and non -reducing end?

Discussion

42.	Current I flows through solenoid of length L having N number of turns, when it is connected to DC emfcharged particle is projected along the axis of solenoid with a speed v, then the force on the charged particle in the solenoid:(1) Becomes zero(2) Decreases(3) Remains same 4) Increases
Answer» Current I flows through solenoid of length L having N number of turns, when it is connected to DC emfcharged particle is projected along the axis of solenoid with a speed v, then the force on the charged particle in the solenoid:(1) Becomes zero(2) Decreases(3) Remains same 4) Increases

Discussion

43.	12. In a 13 litre vessel initially following rn occur c solid +S2 gas ~~~~>reversible gives CS2 gas By 12g C, 64g S2,76g CS2 at 1027 degree Celsius temp then total pressure is
Answer» 12. In a 13 litre vessel initially following rn occur c solid +S2 gas ~~~~>reversible gives CS2 gas By 12g C, 64g S2,76g CS2 at 1027 degree Celsius temp then total pressure is

Discussion

44.	Name three factors on which resistance of a given wire depends and state how is it affected by the factors stated by you.
Answer» Name three factors on which resistance of a given wire depends and state how is it affected by the factors stated by you.

Discussion

45.	The given equi-convex lens is broken into four parts and rearranged as shown. If the initial focal length is f, then after rearrangement the equivalent focal length is
Answer» The given equi-convex lens is broken into four parts and rearranged as shown. If the initial focal length is $f$ , then after rearrangement the equivalent focal length is

Discussion

46.	What is the speed of gamma rays in media other than vaccum ? Is it higher than speed of light in that medium( other than vaccum)?
Answer» What is the speed of gamma rays in media other than vaccum ? Is it higher than speed of light in that medium( other than vaccum)?

Discussion

47.	What is LENZ'S LAW?Distinguish between lenz's law and FLEMING 'S RIGHT HAND RULE?
Answer» What is LENZ'S LAW?Distinguish between lenz's law and FLEMING 'S RIGHT HAND RULE?

Discussion

48.	12. A body falls freely under gravity. Its velocity is V, when it has lost potential energy equal to U. What is the mass of the body
Answer» 12. A body falls freely under gravity. Its velocity is V, when it has lost potential energy equal to U. What is the mass of the body

Discussion

49.	What is the most suitable pH range for fresh water plants and animals?
Answer» What is the most suitable pH range for fresh water plants and animals?

Discussion

50.	Find the position of an object which when placed in front of a convex mirror produces a virtual image, which is half of the size of the object .
Answer» Find the position of an object which when placed in front of a convex mirror produces a virtual image, which is half of the size of the object .

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A satellite of mass m is in orbit round the earth at a distance of 2.5 R above its surface. If gravitational field strength at surface of earth is g.calculate centripetal force acting on satellite

Gradual weakening of ciliary muscles with age causes:

A uniform string of mass m hangs vertically from a rigid support. A wave pulse is sent from it's free end towards the fixed end . As the wave pulse moves upward

What is the specific conductance of 0.1 M HA solution, if λ∞(HA)=250 Ω−1cm2mol−1 and the dissociation constant Ka of HA is 2.25×10−5? (Assume α&lt;&lt;1)

The Nyquist sampling rate for the signal m(t)=sin(600πt).cos(800πt)πt is ________kHz.1.4

Find the work done to transfer 1019 electrons from point A to B which are maintained at a potential diffrence of 5 volts.

white light is passed through a prism of angle 10 degree. If the refractive index for red and violet colours are 1.641 and 1.659 respectively, then find the- (a) angles of deviation for violet and red colours.

Mention the different types of representation of functions.

A planer loop of wire rotates in a uniform magnetic field. Initially, at t=0, the plane of the loop is perpendicular to the magnetic field. If it rotates with a period of 10 s about an axis in its plane, then the magnitude of induced emf will be maximum and minimum, respectively at:

Find the energy of H Atom in first excitation state. The value of premitivity factor 4pi epsilon Not Is given as 1.11264 10*-10 C* 2 N*-1 m*-2

Why was the frog angry?

19.A solenoid has 2000 turns wound over a length of 0.3 m. The area of its cross section is 1.2 × 10^–3 m^2. Around its central section a coil of 300 turns is wound. If an initial current of 2 A is reversed in 0.25 s, the e.m.f. induced in the coil is equal to

62.What is the relation between angle of incidence and lateral displacement in a glass slab?

69.How to determine the direction of magnetic dipole moment of a closed loop if current flow is clockwise direction in the loop ?

IN CASE OF SIMPLE AND COMPOUND MICROSCOPE WHY ALWAYS IMAGE SHOULD FORM AT DISTANCE OF LEAST VISION FOR EYE?? WHY WE PREFER FORMING IMAGE AT D IN MICROSCOPE

If the mass of one object is doubled and mass of other remains the same, moreover if the distance between them is halved then how does the gravitational force change?

By adding some amount of ice, the temperature of 500g of water at 50∘C , is lowered to 0∘C. If the specific heat capacity of water is 4.2 J g−1 K−1 and specific specific latent heat of ice is 336 J g−1, then find the mass of ice added to it.

An object of mass 2 kg is sliding with a constant velocity of 4 ms−1 on a frictionless horizontal table. The force required to keep the object moving with the same velocity is:

The S.I. unit of heat capacity is : (a) J kg−1 (b) J K−1 (c) J kg−1 K−1 (d) cal∘C−1

A guitar has Strings of different thickness

If you could use any source of energy for heating your food, which one would you use and why? [3 MARKS]

△ fH \lbrack SF6, g\rbrack = –1100 kJ/mole △ fH \lbrack S, g\rbrack = 275 kJ/mole △ fH \lbrack F, g\rbrack = 80 kJ/mole Find S-F bond energy in SF6(g) (1) 183.33 kJ/mole (2) 309.17 kJ/mole (3) 366.37 kJ/mole (4) 345 kJ/mole

Which one of the following funcions represents the Clausius Clapeyron equation for the change of phase of a pure substance?

A Black Body radiates heat energy at the rate of2×10^5J/sm^2atatemperatureof127^° C.Thetemperatureof

Why is the following image called a miniature?

Analyse the given statements and choose the correct option. Statement 1 : Bending a wire does not affect the electrical resistance. Statement 2 : Resistance of a wire is proportional to resistivity of the material.

A train is moving towards east and the car is along North both with the same speed the observed direction of car to the passenger in the train is

A L−R circuit is connected to a battery of constant EMF E. The switch is closed at time t=0. If Eind denotes the magnitude of induced EMF across inductor and i the current in the circuit at any time t. Then which of the following graph shows the variation of Eind with i?

how to find junction temperature when two roads connecting in serie

Select the correct lens formula where u, v, f have standard meanings.

The average kinetic energy of body in one complete oscillation with respect to position is \lbrack where ω is angular frequency, A is amplitude and m is mass of oscillating body\rbrack

4.Whose resistance 10 ohm 5ohm,7 ohm and 3 ohm are connected so that they form the side of a rectangle AB,BC,CD and DA respectively. Another resistance of 10 ohm is connected across the diagonal AC .The equivalent resistance between A and B is

How do scientists utilise the information about fossils?

A light ray incident at an angle of incidence i passes an equilateral glass prism such that the refracted ray inside the prism is parallel to its base and emerges at an angle of emergence 'e'. Then

In a uniform circular motion the linear speed is constant but there is acceleration because the velocity is changing all the time. This statement is

What is WaveNumber?

20. A charged particle of charge q is moving in a circle of radius R with a uniform speed v. The associated magnetic moment () is given by

How to find electric field or potential at an equatorial point of a ring.

What is difference between the reducing end and non -reducing end?

Current I flows through solenoid of length L having N number of turns, when it is connected to DC emfcharged particle is projected along the axis of solenoid with a speed v, then the force on the charged particle in the solenoid:(1) Becomes zero(2) Decreases(3) Remains same 4) Increases

12. In a 13 litre vessel initially following rn occur c solid +S2 gas ~~~~>reversible gives CS2 gas By 12g C, 64g S2,76g CS2 at 1027 degree Celsius temp then total pressure is

Name three factors on which resistance of a given wire depends and state how is it affected by the factors stated by you.

The given equi-convex lens is broken into four parts and rearranged as shown. If the initial focal length is f, then after rearrangement the equivalent focal length is

What is the speed of gamma rays in media other than vaccum ? Is it higher than speed of light in that medium( other than vaccum)?

What is LENZ'S LAW?Distinguish between lenz's law and FLEMING 'S RIGHT HAND RULE?

12. A body falls freely under gravity. Its velocity is V, when it has lost potential energy equal to U. What is the mass of the body

What is the most suitable pH range for fresh water plants and animals?

Find the position of an object which when placed in front of a convex mirror produces a virtual image, which is half of the size of the object .

What is the specific conductance of 0.1 M HA solution, if λ∞(HA)=250 Ω−1cm2mol−1 and the dissociation constant Ka of HA is 2.25×10−5? (Assume α<<1)

Find the energy of H Atom in first excitation state. The value of premitivity factor 4pi epsilon Not Is given as 1.11264 10-10 C 2 N-1 m-2