50278 + Interview Questions in Physics

1.	If velocity (v) of a particle varies with time (t) as shown in the figure below, then acceleration (a) varies with time as
Answer» If velocity (v) of a particle varies with time (t) as shown in the figure below, then acceleration (a) varies with time as

Discussion

2.	A ball is projected upwards from the ground with an initial speed u . The ball is at a height of 160 m twice within the time internal of 4 sec , then initial speed u is ... Ans is 60 m/s
Answer» A ball is projected upwards from the ground with an initial speed u . The ball is at a height of 160 m twice within the time internal of 4 sec , then initial speed u is ... Ans is 60 m/s

2.

A ball is projected upwards from the ground with an initial speed u . The ball is at a height of 160 m twice within the time internal of 4 sec , then initial speed u is ... Ans is 60 m/s

Answer»

A ball is projected upwards from the ground with an initial speed u . The ball is at a height of 160 m twice within the time internal of 4 sec , then initial speed u is ...

Ans is 60 m/s

Discussion

3.	The RMS value of the electric field of the light coming from the sun is 720 N/C. The average total energy density of the electromagnetic wave is,
Answer» The $R M S$ value of the electric field of the light coming from the sun is $720 N/C$ . The average total energy density of the electromagnetic wave is,

Discussion

4.	A solid sphere rolling on a rough horizontal surface with a linear speed v collides elastically with a fixed, smooth, vertical wall. Find the speed of the sphere after it has started pure rolling in the backward direction.
Answer» A solid sphere rolling on a rough horizontal surface with a linear speed v collides elastically with a fixed, smooth, vertical wall. Find the speed of the sphere after it has started pure rolling in the backward direction.

Discussion

5.	An aluminium measuring rod, which is correct at 5∘C measures the length of a line as 80 cm at 45∘C. If thermal coefficient of linear expansion of aluminium is 2.50×10−5/∘C, the correct length of the line is
Answer» An aluminium measuring rod, which is correct at $5^{\circ} C$ measures the length of a line as $80 cm$ at $45^{\circ} C$ . If thermal coefficient of linear expansion of aluminium is $2.50 \times 10^{- 5} /^{\circ} C$ , the correct length of the line is

Discussion

6.	A cylindrical conductor of radius R is carrying a constant current i. The plot of the magnitude of the magnetic field B with distance d from the centre of the conductor is correctly represented by the figure
Answer» A cylindrical conductor of radius $R$ is carrying a constant current $i$ . The plot of the magnitude of the magnetic field $B$ with distance $d$ from the centre of the conductor is correctly represented by the figure

Discussion

7.	54.Explain Triangle and Parallelogram Law of vector addition.
Answer» 54.Explain Triangle and Parallelogram Law of vector addition.

Discussion

8.	A person standing on a tower of height H wishes to hit a target placed on incline plane by throwing projectile horizontally as shown in figure. If H = 11 m and L = 10 m, then speed required for projectile is m/s. ( g = 10 m/s2)
Answer» A person standing on a tower of height H wishes to hit a target placed on incline plane by throwing projectile horizontally as shown in figure. If H = 11 m and L = 10 m, then speed required for projectile is m/s. $(g = 10 m / s^{2})$

Discussion

9.	In the figure shown, find the acceleration (in m/s2) of the blocks if the wedge is fixed. (String is massless and inextensible)
Answer» In the figure shown, find the acceleration (in $m / s^{2}$ ) of the blocks if the wedge is fixed. (String is massless and inextensible)

Discussion

10.	Find electric dipole moment of the system in which -q charge is distributed on the circumference of the semicircular ring and +q is placed at the center of the ring
Answer» Find electric dipole moment of the system in which -q charge is distributed on the circumference of the semicircular ring and +q is placed at the center of the ring

Discussion

11.	Three equal point masses of 1.5kg each are fixed at the vertices of equilateral triangle of side 1 m. What is the force acting on a particle of mass 1 kg place at its centroid
Answer» Three equal point masses of 1.5kg each are fixed at the vertices of equilateral triangle of side 1 m. What is the force acting on a particle of mass 1 kg place at its centroid

Discussion

12.	Two identical containers A and B each of volume V0 are joined by a small pipe. The containers contain identical gases at temperature T0 and pressure P0. Container A is heated to temperature 2T0 while maintaining B at the same temperature. If the common pressure of the gas is P and n1 and n2 are the number of moles of the gas in A and B respectively, then choose the correct option(s):
Answer» Two identical containers $A$ and $B$ each of volume $V_{0}$ are joined by a small pipe. The containers contain identical gases at temperature $T_{0}$ and pressure $P_{0}$ . Container $A$ is heated to temperature $2 T_{0}$ while maintaining $B$ at the same temperature. If the common pressure of the gas is $P$ and $n_{1}$ and $n_{2}$ are the number of moles of the gas in $A$ and $B$ respectively, then choose the correct option(s):

Discussion

13.	What physical quantity is the same for X-rays of wavelength 10−10 m, red light of wavelength 6800 Å and radiowaves of wavelength 500 m?
Answer» What physical quantity is the same for X-rays of wavelength 10⁻¹⁰ m, red light of wavelength 6800 Å and radiowaves of wavelength 500 m?

Discussion

14.	18. Find relation of size of I-,Br-,Cl-,H-?
Answer» 18. Find relation of size of I-,Br-,Cl-,H-?

Discussion

15.	A black body radiates energy at the rate of E W/m2 at a high temperature TK. When the temperature is reduced to T2K, the radiant energy will be
Answer» A black body radiates energy at the rate of E $W / m^{2}$ at a high temperature TK. When the temperature is reduced to $\frac{T}{2} K$ , the radiant energy will be

Discussion

16.	68. Assertion :A negative acceleration of a body can be associated with a 'speeding up' of the body. Reason :Increase in speed of a moving body is independent of its direction of motion.
Answer» 68. Assertion :A negative acceleration of a body can be associated with a 'speeding up' of the body. Reason :Increase in speed of a moving body is independent of its direction of motion.

Discussion

17.	The water level in a small aquarium reaches up to a mark A. After a large ice cube is dropped into the water, the cube floats and the water level rises to a new mark B. What will happen to the water level as the ice melts? Explain.
Answer» The water level in a small aquarium reaches up to a mark A. After a large ice cube is dropped into the water, the cube floats and the water level rises to a new mark B. What will happen to the water level as the ice melts? Explain.

Discussion

18.	An X-ray tube operates at 40 kV. Suppose the electron converts 70% of its energy into a photon at each collision. Find the lowest three wavelengths emitted from the tube. Neglect the energy imparted to the atom with which the electron collides.(hc=1242 eV-nm)
Answer» An X-ray tube operates at $40 kV$ . Suppose the electron converts $70 %$ of its energy into a photon at each collision. Find the lowest three wavelengths emitted from the tube. Neglect the energy imparted to the atom with which the electron collides. $(h c = 1242 eV-nm)$

Discussion

19.	the escape velocity from the equlibrium point of a uniform ring of mass M and radius R is OPTIONS ROOT 2GM/R ROOT GM/R ROOT GM/2R 2ROOT GM/R
Answer» the escape velocity from the equlibrium point of a uniform ring of mass M and radius R is OPTIONS ROOT 2GM/R ROOT GM/R ROOT GM/2R 2ROOT GM/R

Discussion

20.	A weight Mg is suspended from the middle of a rope whose ends are at the same level. The minimum tension required to completely straighten the rope is
Answer» A weight Mg is suspended from the middle of a rope whose ends are at the same level. The minimum tension required to completely straighten the rope is

Discussion

21.	Simplify: (4-2)(2+1/2)
Answer» Simplify: (4-2)(2+1/2)

Discussion

22.	Answer the following questions based on the P – T phase diagram of CO2: (a) CO2 at 1 atm pressure and temperature – 60 °C is compressed isothermally. Does it go through a liquid phase ? (b) What happens when CO2 at 4 atm pressure is cooled from room temperature at constant pressure ? (c) Describe qualitatively the changes in a given mass of solid CO2 at 10 atm pressure and temperature –65 °C as it is heated up to room temperature at constant pressure. (d) CO2 is heated to a temperature 70 °C and compressed isothermally. What changes in its properties do you expect to observe ?
Answer» Answer the following questions based on the P – T phase diagram of CO2: (a) CO2 at 1 atm pressure and temperature – 60 °C is compressed isothermally. Does it go through a liquid phase ? (b) What happens when CO2 at 4 atm pressure is cooled from room temperature at constant pressure ? (c) Describe qualitatively the changes in a given mass of solid CO2 at 10 atm pressure and temperature –65 °C as it is heated up to room temperature at constant pressure. (d) CO2 is heated to a temperature 70 °C and compressed isothermally. What changes in its properties do you expect to observe ?

Discussion

23.	An object is placed 15 cm in front of a lens. The lens forms a real image three times magnified. Find out the image distance and the focal length of a lens?
Answer» An object is placed $15 c m$ in front of a lens. The lens forms a real image three times magnified. Find out the image distance and the focal length of a lens?

Discussion

24.	A point charge q1=2 μC is placed at the origin of coordinates. A second charge, q2=−3 μC, is placed on the x− axis at x=100 cm. For what positive x−coordinate of a point on the x−axis, the absolute potential at it is zero?
Answer» A point charge $q_{1} = 2 μ C$ is placed at the origin of coordinates. A second charge, $q_{2} = - 3 μ C$ , is placed on the $x -$ axis at $x = 100 cm$ . For what positive $x -$ coordinate of a point on the $x -$ axis, the absolute potential at it is zero?

Discussion

25.	. A positively charged thin metal ring of radius R is fixed in x-y plane with its centre at the originA negatively charged particle P is released from rest at the point (0,0,Z.). Then the motion of Pis(a) periodic for all values of Z,(b) SHM for all values of Z, satisfying 0 > R(d) None of the above
Answer» . A positively charged thin metal ring of radius R is fixed in x-y plane with its centre at the originA negatively charged particle P is released from rest at the point (0,0,Z.). Then the motion of Pis(a) periodic for all values of Z,(b) SHM for all values of Z, satisfying 0 > R(d) None of the above

Discussion

26.	If a ball of mass 10gm strikes perpendicular on a hard floor with speed 5 m/sec and rebounces with the same speed and remains in contact with floor for 1sec, then the force applied on the ball by the floor is how much
Answer» If a ball of mass 10gm strikes perpendicular on a hard floor with speed 5 m/sec and rebounces with the same speed and remains in contact with floor for 1sec, then the force applied on the ball by the floor is how much

Discussion

27.

Figure shows three concentric conducting spherical shells with inner and outer shells earthed and the middle shell is given a charge q . Let, q1 be the charge accumulated on sphere 1 and q3 be the charge accumulated on sphere 3, then match the column 1 with column 2 (where, K is Coulomb's constant) S.No Column 1 S.No Column 2 1. q1 a. 0 2. q3 b. −425q 3. Electrostatic energy of the system stored in the region II. c. −2125q d. −q e. 2K(q)235r f. 2K(q1+q)235r

Answer»

Figure shows three concentric conducting spherical shells with inner and outer shells earthed and the middle shell is given a charge $q$ . Let, $q_{1}$ be the charge accumulated on sphere 1 and $q_{3}$ be the charge accumulated on sphere 3, then match the column 1 with column 2 (where, $K$ is Coulomb's constant)

S.No	Column 1	S.No	Column 2
1.	$q_{1}$	a.	0
2.	$q_{3}$	b.	$\frac{- 4}{25} q$
3.	Electrostatic energy of the system stored in the region II.	c.	$\frac{- 21}{25} q$
		d.	$- q$
		e.	$\frac{2 K {(q)}^{2}}{35 r}$
		f.	$\frac{2 K {(q_{1} + q)}_{1}^{2}}{35 r}$

Discussion

28.	In 6th properties of reflection at plane surface, how "angle of deviation net = angle of deviation 1 + angle of deviation 2" ?
Answer» In 6th properties of reflection at plane surface, how "angle of deviation net = angle of deviation 1 + angle of deviation 2" ?

Discussion

29.	What is free falling?
Answer» What is free falling?

Discussion

30.	ChoosecorrectA force of 10 N is applied on a 5 kg mass at rest.The work done by the force in first two second1.will be(1) 20 J(2) 40 J(4) ZeroPAJ(3) 30 J
Answer» ChoosecorrectA force of 10 N is applied on a 5 kg mass at rest.The work done by the force in first two second1.will be(1) 20 J(2) 40 J(4) ZeroPAJ(3) 30 J

Discussion

31.	a stone is thrown vertically upwards with initial velocity of 40 m/s. Taking g=10 m/s2, find the maximum height reached by the stone.What is the net displacement and the total dis†an ce covered by the stone
Answer» a stone is thrown vertically upwards with initial velocity of 40 m/s. Taking g=10 m/s2, find the maximum height reached by the stone.What is the net displacement and the total dis†an ce covered by the stone

Discussion

32.	To get the formula of electric field due to a ring at the centre from the formula of electric field due to an arc at centre, replace θ with .
Answer» To get the formula of electric field due to a ring at the centre from the formula of electric field due to an arc at centre, replace $θ$ with .

Discussion

33.	A particle moves on a straight line, and its v - t graph is shown. List - I gives some quantites, and List - II gives some possible magnitudes of quantites, then correct match is List - IList - III) Average velocity of 4 secP) 0II) Average acceleration of 4 secQ) 5III) Displacement in 4 secR) 10IV) Velocity at t = 4 secS) 20T) 40U) 50
Answer» A particle moves on a straight line, and its v - t graph is shown. List - I gives some quantites, and List - II gives some possible magnitudes of quantites, then correct match is $\begin{matrix} List - I & List - II I) Average velocity of 4 sec & P) 0 II) Average acceleration of 4 sec & Q) 5 III) Displacement in 4 sec & R) 10 IV) Velocity at t = 4 sec & S) 20 T) 40 U) 50 \end{matrix}$

Discussion

34.	Two masses 6 kg and 4 kg are connected by massless flexible and inextensible string passing over massless and frictionless pulley. The magnitude of acceleration of centre of mass is (g = 10 ms–2)
Answer» Two masses 6 kg and 4 kg are connected by massless flexible and inextensible string passing over massless and frictionless pulley. The magnitude of acceleration of centre of mass is (g = 10 ms–2)

Discussion

35.	6.Tension T in the string connecting 10 kg and 5 kg blocks (as shown in the figure) is [g = 10 m/s]
Answer» 6.Tension T in the string connecting 10 kg and 5 kg blocks (as shown in the figure) is [g = 10 m/s]

Discussion

36.	A light ray is incident on a glass sphere at an angle of incidence 60∘ as shown in the figure. The amount of total deviation suffered by the light ray when it comes out of the glass sphere will be
Answer» A light ray is incident on a glass sphere at an angle of incidence $60^{\circ}$ as shown in the figure. The amount of total deviation suffered by the light ray when it comes out of the glass sphere will be

Discussion

37.	The equivalent resistance of the series combination of two resistors is ′s′. When they are connected in parallel, the equivalent resistance is ′p′. If s=np, then the minimum value for n is ______.(Round off to the nearest integer)
Answer» The equivalent resistance of the series combination of two resistors is $^{'} s^{'}$ . When they are connected in parallel, the equivalent resistance is $^{'} p^{'}$ . If $s = n p$ , then the minimum value for $n$ is ______. $($ Round off to the nearest integer $)$

Discussion

38.	An enemy plane is flying horizontally at an altitude of 2 km with a speed of 300 ms−1. An armyman with an anti-aircraft gun on the ground sights the enemy plane when it is directly overhead and fires a shell with a muzzle speed of 600 ms−1. At what angle with the vertical should the gun be fired so as to hit the plane?
Answer» An enemy plane is flying horizontally at an altitude of 2 km with a speed of 300 $m s^{- 1} .$ An armyman with an anti-aircraft gun on the ground sights the enemy plane when it is directly overhead and fires a shell with a muzzle speed of 600 $m s^{- 1}$ . At what angle with the vertical should the gun be fired so as to hit the plane?

Discussion

39.	A thin ring of radius Rhas a charge Q non-uniformly distributed on it. The electrostatic potential at the center of the ring will be
Answer» A thin ring of radius Rhas a charge Q non-uniformly distributed on it. The electrostatic potential at the center of the ring will be

Discussion

40.	The electric field due to a point charge makes an angle of with the tangent drawn at the equipotential surface at any point is1. 02. 60 3. 1804. 90
Answer» The electric field due to a point charge makes an angle of with the tangent drawn at the equipotential surface at any point is 1. 0 2. 60 3. 180 4. 90

Discussion

41.	A thermally insulated rigid container contains an ideal gas at 27oC. It is fitted with a heating coil of resistance 50Ω. A current is passed through the coil for 10 minutes by connecting it to a d.c. source of 10 V. The change in the internal energy is
Answer» A thermally insulated rigid container contains an ideal gas at $27^{o} C$ . It is fitted with a heating coil of resistance 50 $Ω$ . A current is passed through the coil for 10 minutes by connecting it to a d.c. source of 10 V. The change in the internal energy is

Discussion

42.	If the radius of curvature of the path of two particles having same speed are in the ratio of 1:√2, then in order to have masses in the ratio of 2:1, their centripetal forces should be in the ratio of
Answer» If the radius of curvature of the path of two particles having same speed are in the ratio of $1 : \sqrt{2}$ , then in order to have masses in the ratio of $2 : 1$ , their centripetal forces should be in the ratio of

Discussion

43.	The Bat Life: Such a process where the gas is taken from one state to another through infinitely small changes is called
Answer» The Bat Life: Such a process where the gas is taken from one state to another through infinitely small changes is called

Discussion

44.	The instantaneous potential difference between points A and B is :
Answer» The instantaneous potential difference between points $A$ and $B$ is :

Discussion

45.	A man standing in a valley between two parallel mountains fires a gun and hears echo at an interval of 2 s and 3.5s. What is a) the distance between two mountains? b) the location of the man with respect to the mountain?
Answer» A man standing in a valley between two parallel mountains fires a gun and hears echo at an interval of 2 s and 3.5s. What is a) the distance between two mountains? b) the location of the man with respect to the mountain?

Discussion

46.	At some location on earth the horizontal component of earth's magnetic field is 18×10−6 T. At this location, magnetic needle of length 0.12 m and pole strength 1.8 Am is suspended from its mid-point using a thread, it makes 45∘ angle with horizontal in equilibrium.To keep this needle horizontal,the vertical force that should be applied at one of its ends is
Answer» At some location on earth the horizontal component of earth's magnetic field is $18 \times 10^{- 6} T$ . At this location, magnetic needle of length $0.12 m$ and pole strength $1.8 Am$ is suspended from its mid-point using a thread, it makes $45^{\circ}$ angle with horizontal in equilibrium.To keep this needle horizontal,the vertical force that should be applied at one of its ends is

Discussion

47.	Twelve resistors each of resistance r are connected together so that each lies along the edge of the cube as shown in the figure. The equivalent resistance between points 1 and 3 is
Answer» Twelve resistors each of resistance $r$ are connected together so that each lies along the edge of the cube as shown in the figure. The equivalent resistance between points $1$ and $3$ is

Discussion

48.	What is the formula for the radius of a particle in a parabolic path at any instant, making an angle with the horizontal, if the instantaneous velocity has to be considered?
Answer» What is the formula for the radius of a particle in a parabolic path at any instant, making an angle with the horizontal, if the instantaneous velocity has to be considered?

Discussion

49.	31. A projectile has been thrown up at initial velocity 10 m/s making 60^° with the horizontal. Taking g=10 m/s², the radius of curvature of the trajectory at the point of projection is (1) 10 m10(2)m(3) 20 m20(4)nm
Answer» 31. A projectile has been thrown up at initial velocity 10 m/s making 60^° with the horizontal. Taking g=10 m/s², the radius of curvature of the trajectory at the point of projection is (1) 10 m10(2)m(3) 20 m20(4)nm

Discussion

50.	Calculate the torque developed by an airplane engine whose output is 3200 HP at an angular velocity of 2400 rev/min. (1 HP=746 J/s)
Answer» Calculate the torque developed by an airplane engine whose output is $3200 HP$ at an angular velocity of $2400 rev/min$ . $(1 HP = 746 J/s)$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If velocity (v) of a particle varies with time (t) as shown in the figure below, then acceleration (a) varies with time as

A ball is projected upwards from the ground with an initial speed u . The ball is at a height of 160 m twice within the time internal of 4 sec , then initial speed u is ... Ans is 60 m/s

The RMS value of the electric field of the light coming from the sun is 720 N/C. The average total energy density of the electromagnetic wave is,

A solid sphere rolling on a rough horizontal surface with a linear speed v collides elastically with a fixed, smooth, vertical wall. Find the speed of the sphere after it has started pure rolling in the backward direction.

An aluminium measuring rod, which is correct at 5∘C measures the length of a line as 80 cm at 45∘C. If thermal coefficient of linear expansion of aluminium is 2.50×10−5/∘C, the correct length of the line is

A cylindrical conductor of radius R is carrying a constant current i. The plot of the magnitude of the magnetic field B with distance d from the centre of the conductor is correctly represented by the figure

54.Explain Triangle and Parallelogram Law of vector addition.

A person standing on a tower of height H wishes to hit a target placed on incline plane by throwing projectile horizontally as shown in figure. If H = 11 m and L = 10 m, then speed required for projectile is m/s. ( g = 10 m/s2)

In the figure shown, find the acceleration (in m/s2) of the blocks if the wedge is fixed. (String is massless and inextensible)

Find electric dipole moment of the system in which -q charge is distributed on the circumference of the semicircular ring and +q is placed at the center of the ring

Three equal point masses of 1.5kg each are fixed at the vertices of equilateral triangle of side 1 m. What is the force acting on a particle of mass 1 kg place at its centroid

What physical quantity is the same for X-rays of wavelength 10−10 m, red light of wavelength 6800 Å and radiowaves of wavelength 500 m?

18. Find relation of size of I-,Br-,Cl-,H-?

A black body radiates energy at the rate of E W/m2 at a high temperature TK. When the temperature is reduced to T2K, the radiant energy will be

68. Assertion :A negative acceleration of a body can be associated with a 'speeding up' of the body. Reason :Increase in speed of a moving body is independent of its direction of motion.

The water level in a small aquarium reaches up to a mark A. After a large ice cube is dropped into the water, the cube floats and the water level rises to a new mark B. What will happen to the water level as the ice melts? Explain.

An X-ray tube operates at 40 kV. Suppose the electron converts 70% of its energy into a photon at each collision. Find the lowest three wavelengths emitted from the tube. Neglect the energy imparted to the atom with which the electron collides.(hc=1242 eV-nm)

the escape velocity from the equlibrium point of a uniform ring of mass M and radius R is OPTIONS ROOT 2GM/R ROOT GM/R ROOT GM/2R 2ROOT GM/R

A weight Mg is suspended from the middle of a rope whose ends are at the same level. The minimum tension required to completely straighten the rope is

Simplify: (4-2)(2+1/2)

An object is placed 15 cm in front of a lens. The lens forms a real image three times magnified. Find out the image distance and the focal length of a lens?

A point charge q1=2 μC is placed at the origin of coordinates. A second charge, q2=−3 μC, is placed on the x− axis at x=100 cm. For what positive x−coordinate of a point on the x−axis, the absolute potential at it is zero?

If a ball of mass 10gm strikes perpendicular on a hard floor with speed 5 m/sec and rebounces with the same speed and remains in contact with floor for 1sec, then the force applied on the ball by the floor is how much

In 6th properties of reflection at plane surface, how "angle of deviation net = angle of deviation 1 + angle of deviation 2" ?

What is free falling?

ChoosecorrectA force of 10 N is applied on a 5 kg mass at rest.The work done by the force in first two second1.will be(1) 20 J(2) 40 J(4) ZeroPAJ(3) 30 J

a stone is thrown vertically upwards with initial velocity of 40 m/s. Taking g=10 m/s2, find the maximum height reached by the stone.What is the net displacement and the total dis†an ce covered by the stone

To get the formula of electric field due to a ring at the centre from the formula of electric field due to an arc at centre, replace θ with .

Two masses 6 kg and 4 kg are connected by massless flexible and inextensible string passing over massless and frictionless pulley. The magnitude of acceleration of centre of mass is (g = 10 ms–2)

6.Tension T in the string connecting 10 kg and 5 kg blocks (as shown in the figure) is [g = 10 m/s]

A light ray is incident on a glass sphere at an angle of incidence 60∘ as shown in the figure. The amount of total deviation suffered by the light ray when it comes out of the glass sphere will be

The equivalent resistance of the series combination of two resistors is ′s′. When they are connected in parallel, the equivalent resistance is ′p′. If s=np, then the minimum value for n is ______.(Round off to the nearest integer)

A thin ring of radius Rhas a charge Q non-uniformly distributed on it. The electrostatic potential at the center of the ring will be

The electric field due to a point charge makes an angle of with the tangent drawn at the equipotential surface at any point is1. 02. 60 3. 1804. 90

A thermally insulated rigid container contains an ideal gas at 27oC. It is fitted with a heating coil of resistance 50Ω. A current is passed through the coil for 10 minutes by connecting it to a d.c. source of 10 V. The change in the internal energy is

If the radius of curvature of the path of two particles having same speed are in the ratio of 1:√2, then in order to have masses in the ratio of 2:1, their centripetal forces should be in the ratio of

The Bat Life: Such a process where the gas is taken from one state to another through infinitely small changes is called

The instantaneous potential difference between points A and B is :

A man standing in a valley between two parallel mountains fires a gun and hears echo at an interval of 2 s and 3.5s. What is a) the distance between two mountains? b) the location of the man with respect to the mountain?

Twelve resistors each of resistance r are connected together so that each lies along the edge of the cube as shown in the figure. The equivalent resistance between points 1 and 3 is

What is the formula for the radius of a particle in a parabolic path at any instant, making an angle with the horizontal, if the instantaneous velocity has to be considered?

31. A projectile has been thrown up at initial velocity 10 m/s making 60^° with the horizontal. Taking g=10 m/s², the radius of curvature of the trajectory at the point of projection is (1) 10 m10(2)m(3) 20 m20(4)nm

Calculate the torque developed by an airplane engine whose output is 3200 HP at an angular velocity of 2400 rev/min. (1 HP=746 J/s)