50278 + Interview Questions in Physics

1.	Youmay have seen in a circus a motorcyclist driving in vertical loopsinside a ‘death-well’ (a hollow spherical chamber withholes, so the spectators can watch from outside). Explain clearly whythe motorcyclist does not drop down when he is at the uppermostpoint, with no support from below. What is the minimum speed requiredat the uppermost position to perform a vertical loop if the radius ofthe chamber is 25 m?
Answer» You may have seen in a circus a motorcyclist driving in vertical loops inside a ‘death-well’ (a hollow spherical chamber with holes, so the spectators can watch from outside). Explain clearly why the motorcyclist does not drop down when he is at the uppermost point, with no support from below. What is the minimum speed required at the uppermost position to perform a vertical loop if the radius of the chamber is 25 m?

Discussion

2.	Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross-sectional area A=10 cm2 and length 20 cm. It one of the solenoid has 300 turns and the other 400 turns, their mutual inductance is
Answer» Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross-sectional area $A = 10 {cm}^{2}$ and length $20 cm$ . It one of the solenoid has $300$ turns and the other $400$ turns, their mutual inductance is

Discussion

3.	A particle of mass m is moving in a horizontal circle of radius r with a centripetal force where k = 1 F=−kr2^r unit. The total energy of the particle is
Answer» A particle of mass m is moving in a horizontal circle of radius r with a centripetal force where k = 1 $F = - \frac{k}{r^{2}}^r$ unit. The total energy of the particle is

Discussion

4.	a stone is thrown with a speed of 10m/s at an angle of projection 60 degree.find its height above the point of projection when it is at a horizontal dis†an ce 3m from the thrower?
Answer» a stone is thrown with a speed of 10m/s at an angle of projection 60 degree.find its height above the point of projection when it is at a horizontal dis†an ce 3m from the thrower?

Discussion

5.	A 10μ F capacitor is fully charged to a potential difference of 50 V. After removing the source voltage it is connected to an uncharged capacitor in parallel. Now the potential difference across them becomes 20 V. The capacitance of the second capacitor is
Answer» $A 10 μ F$ capacitor is fully charged to a potential difference of $50 V$ . After removing the source voltage it is connected to an uncharged capacitor in parallel. Now the potential difference across them becomes $20 V$ . The capacitance of the second capacitor is

Discussion

6.	which of the following graph correctly represents the variation of C = -dV/V dP . with pressure P for an ideal gas at cons†an t temperature ?
Answer» which of the following graph correctly represents the variation of C = -dV/V dP . with pressure P for an ideal gas at cons†an t temperature ?

Discussion

7.	In a semiconductor, the number density of intrinsic charge carriers at 27∘C is 1.5×1016 m−3. If the semiconductor is doped with impurity atom, the hole density increases to 4.5×1022 m−3. The electron density in the doped semiconductor is ×109 m−3.
Answer» In a semiconductor, the number density of intrinsic charge carriers at $27^{\circ} C$ is $1.5 \times 10^{16} m^{- 3}$ . If the semiconductor is doped with impurity atom, the hole density increases to $4.5 \times 10^{22} m^{- 3}$ . The electron density in the doped semiconductor is $\times 10^{9} m^{- 3}$ .

Discussion

8.	A water pipe has an internal diameter of 10 cm. Water flows through it at the rate of 20 m/sec. The water jet strikes normally on a wall and falls dead. Find the force on the wall (in newtons). (round off to the nearest integer)[ρw=1000 kg/m3]
Answer» A water pipe has an internal diameter of $10 cm$ . Water flows through it at the rate of $20 m/sec$ . The water jet strikes normally on a wall and falls dead. Find the force on the wall (in $newtons$ ). (round off to the nearest integer) [ $ρ_{w} = 1000 {kg/m}^{3}$ ]

Discussion

9.	A long infinite current carrying wire is bent right angles as shown in figure. Find the magnetic field at point P which is equidistant from both wires at L.
Answer» A long infinite current carrying wire is bent right angles as shown in figure. Find the magnetic field at point $P$ which is equidistant from both wires at $L .$

Discussion

10.	Two tuning forks A and B vibrating simultaneously produce 5 beats. Frequency of B is 512. It is seen that if one arm of A is filed, then the number of beats increases. Frequency of A will be
Answer» Two tuning forks A and B vibrating simultaneously produce 5 beats. Frequency of B is 512. It is seen that if one arm of A is filed, then the number of beats increases. Frequency of A will be

Discussion

11.	A small telescope has an objective lens of focal length 150 cm and an eye-piece of focal length 5 cm. What is the magnifying power of the telescope for viewing distant objects in normal adjustment? If this telescope is used to view a 100 m tall tower 3 km away, what is the height of the image of the tower formed by the objective lens?
Answer» A small telescope has an objective lens of focal length 150 cm and an eye-piece of focal length 5 cm. What is the magnifying power of the telescope for viewing distant objects in normal adjustment? If this telescope is used to view a 100 m tall tower 3 km away, what is the height of the image of the tower formed by the objective lens?

Discussion

12.	a semicircular ring of radius 0.5 m is uniformly charged with a total charge of 1.4 * 10^-9 C. The electric field intensity at the centre of this ring is
Answer» a semicircular ring of radius 0.5 m is uniformly charged with a total charge of 1.4 * 10^-9 C. The electric field intensity at the centre of this ring is

Discussion

13.	In Bohr's model of hydrogen atom, the ratio of the period of revolution of an electron in the first orbit to that in the second orbit, is,
Answer» In Bohr's model of hydrogen atom, the ratio of the period of revolution of an electron in the first orbit to that in the second orbit, is,

Discussion

14.	91.A positively charged pendulum is oscillating in a uniform electric field pointing upwards.Its time period as compared to that when it oscillates without electric field is more or less.
Answer» 91.A positively charged pendulum is oscillating in a uniform electric field pointing upwards.Its time period as compared to that when it oscillates without electric field is more or less.

Discussion

15.	A circular road of radius 1000 m has banking angle 45∘. The maximum safe speed of a car having mass 2000 kg will be, if the coefficient of friction between tyre and road is 0.5
Answer» A circular road of radius 1000 m has banking angle $45^{\circ}$ . The maximum safe speed of a car having mass 2000 kg will be, if the coefficient of friction between tyre and road is 0.5

Discussion

16.	In Young's double – slit experiment, the y – coordinates of central maxima and 10th maxima are 2cm and 5cm, respectively. When the YDSE apparatus is immersed in a liquid of refractive index 1.5, the corresponding y – coordinates will be
Answer» In Young's double – slit experiment, the y – coordinates of central maxima and $10^{t h}$ maxima are 2cm and 5cm, respectively. When the YDSE apparatus is immersed in a liquid of refractive index 1.5, the corresponding y – coordinates will be

Discussion

17.	A sphere of mass 50 g is suspended by a string in an electric field of intensity 5 NC−1 acting vertically upward. If the charge on the sphere is 4×10−3 C then the tension in the string is (g=10 ms−2)
Answer» A sphere of mass $50 g$ is suspended by a string in an electric field of intensity $5 {NC}^{- 1}$ acting vertically upward. If the charge on the sphere is $4 \times 10^{- 3} C$ then the tension in the string is $(g = 10 {ms}^{- 2})$

Discussion

18.	If potential at the surface of earth is assigned zero value, then potential at the centre of earth will be ( mass M, radius R)
Answer» If potential at the surface of earth is assigned zero value, then potential at the centre of earth will be ( mass M, radius R)

Discussion

19.	Two small blocks slide without losing contact with the surface along two frictionless tracks 1 & 2, starting at the same time with same initial velocity v. Track 1 is perfectly horizontal while track 2 has a dip in the middle as shown in the figure. Which body will reach the finish line first?
Answer» Two small blocks slide without losing contact with the surface along two frictionless tracks 1 & 2, starting at the same time with same initial velocity v. Track 1 is perfectly horizontal while track 2 has a dip in the middle as shown in the figure. Which body will reach the finish line first?

Discussion

20.	what is rigid body mechanics and is it compulsory that in it the direction of friction is same as the direction of motio
Answer» what is rigid body mechanics and is it compulsory that in it the direction of friction is same as the direction of motio

Discussion

21.	If a man of mass M jumps to the ground from a height h and his centre of mass moves a distance of x during the impact, the average force acting on him (assuming his retardation to be constant during his impact with the ground) is
Answer» If a man of mass M jumps to the ground from a height h and his centre of mass moves a distance of x during the impact, the average force acting on him (assuming his retardation to be constant during his impact with the ground) is

Discussion

22.	A wheel of radius 1 meter rolls forward half a revolution on a horizontal ground. The magnitude of the displacement of the point of the wheel initially in contact with the ground is
Answer» A wheel of radius 1 meter rolls forward half a revolution on a horizontal ground. The magnitude of the displacement of the point of the wheel initially in contact with the ground is

Discussion

23.	Find the total torque acting on the body shown in the figure about the point O
Answer» Find the total torque acting on the body shown in the figure about the point $O$

Discussion

24.	A uniform rod of length L and weight W is suspended horizontally by two vertical ropes as shown. The first rope is attached to the left end of the rod while the second rope is attached a distance from the right end. The tension in the second rope is
Answer» A uniform rod of length L and weight W is suspended horizontally by two vertical ropes as shown. The first rope is attached to the left end of the rod while the second rope is attached a distance from the right end. The tension in the second rope is

24.

A uniform rod of length L and weight W is suspended horizontally by two vertical ropes as shown. The first rope is attached to the left end of the rod while the second rope is attached a distance from the right end. The tension in the second rope is

Answer»

A uniform rod of length L and weight W is suspended horizontally by two vertical ropes as shown. The first rope is attached to the left end of the rod while the second rope is attached a distance from the right end. The tension in the second rope is

Discussion

25.	Two equal charges of magnitude Q each are placed at a distance d apart. Their electrostatic energy is E. A third charge −Q2 is brought midway between these two charges. The electrostatic energy of the system is now
Answer» Two equal charges of magnitude Q each are placed at a distance d apart. Their electrostatic energy is E. A third charge $- \frac{Q}{2}$ is brought midway between these two charges. The electrostatic energy of the system is now

Discussion

26.	A proton moves along horizontal line and towards observer, the pattern of concentric circular field lines of magnetic field which produced due to its motion: 1. ACW, in horizontal plane 2. ACW, in vertical plane 3. CW, in horizontal plane 4. CW, in vertical plane Explain also
Answer» A proton moves along horizontal line and towards observer, the pattern of concentric circular field lines of magnetic field which produced due to its motion: 1. ACW, in horizontal plane 2. ACW, in vertical plane 3. CW, in horizontal plane 4. CW, in vertical plane Explain also

Discussion

27.	What is the magnitude of the gravitational force exerted by a 15 kg mass on a 25 kg mass separated by a distance of 25 cm. What is the acceleration produced in each mass?
Answer» What is the magnitude of the gravitational force exerted by a $15 k g$ mass on a $25 k g$ mass separated by a distance of $25 c m$ . What is the acceleration produced in each mass?

Discussion

28.	If the threshold wavelength for sodium is 5420 ∘A, then the work function of sodium is
Answer» If the threshold wavelength for sodium is $5420 \circ A$ , then the work function of sodium is

Discussion

29.	A particle was thrown with a speed of 20m/s at an angle of 30 degree with horizontal. Find its position along 'x' and 'y' axis at 1 second.
Answer» A particle was thrown with a speed of 20m/s at an angle of 30 degree with horizontal. Find its position along 'x' and 'y' axis at 1 second.

Discussion

30.	Two discs are rotating about the same axis passing through their centres and perpendicular to both discs' planes. If disc 1 has mass 5 kg and 30 cm radius and disc 2 has mass 7 kg and 60 cm radius, then find the moment of intertia about an axis OO'.
Answer» Two discs are rotating about the same axis passing through their centres and perpendicular to both discs' planes. If disc $1$ has mass $5 kg$ and $30 cm$ radius and disc $2$ has mass $7 kg$ and $60 cm$ radius, then find the moment of intertia about an axis $OO'$ .

Discussion

31.	The ratio of height of image produced by concave lens to a height of object is 0.5.Assume focal length of the lens is 10 cm.find the distance of image from the lens
Answer» The ratio of height of image produced by concave lens to a height of object is 0.5.Assume focal length of the lens is 10 cm.find the distance of image from the lens

Discussion

32.	Explain why a car does not move when the force is applied on it by a person present inside the car?
Answer» Explain why a car does not move when the force is applied on it by a person present inside the car?

Discussion

33.	Which of the following is true for photon
Answer» Which of the following is true for photon

Discussion

34.	38.Rain is falling at the speed of 25root three m/s vertically. The wind blows west to east at a speed of 25 m/s . Find the velocity of rain w.r.t wind
Answer» 38.Rain is falling at the speed of 25root three m/s vertically. The wind blows west to east at a speed of 25 m/s . Find the velocity of rain w.r.t wind

Discussion

35.	Determine the volume contraction of a solid copper cube, 10 cm on an edge, when subjected to a hydraulic pressure of 7.0 × 10⁶ Pa.
Answer» Determine the volume contraction of a solid copper cube, 10 cm on an edge, when subjected to a hydraulic pressure of 7.0 × 10⁶ Pa.

Discussion

36.	A box of mass 70 kg is being lifted by a helicopter with the help of a rope, which can bear a maximum tension of 100 kg wt. The maximum acceleration with which helicopter should rise so that the rope does not break will be (Given g=9.8 m/s2)
Answer» A box of mass $70 k g$ is being lifted by a helicopter with the help of a rope, which can bear a maximum tension of $100 k g$ wt. The maximum acceleration with which helicopter should rise so that the rope does not break will be (Given $g = 9.8 m / s^{2}$ )

Discussion

37.	A body of mass m1 collides head on elastically with a stationary body of mass m2. If velocities of m1 before and after the collision are v and –v/3 respectively then the value of m1/m2 is
Answer» A body of mass $m_{1}$ collides head on elastically with a stationary body of mass $m_{2}$ . If velocities of $m_{1}$ before and after the collision are $v$ and $- v / 3$ respectively then the value of $m_{1} / m_{2}$ is

Discussion

38.	For velocity – time graph of given figure The acceleration – time graph of the motion of the body is
Answer» For velocity – time graph of given figure The acceleration – time graph of the motion of the body is

Discussion

39.	If the resultant of the two forces has a magnitude smaller than the magnitude of larger force, the two forces must be
Answer» If the resultant of the two forces has a magnitude smaller than the magnitude of larger force, the two forces must be

Discussion

40.	What is si unit of sound?
Answer» What is si unit of sound?

Discussion

41.	the position coordinates of a projectile thrown from ground are given by y=(12t-5t^2)m and x=5tm. the initial speed of throw
Answer» the position coordinates of a projectile thrown from ground are given by y=(12t-5t^2)m and x=5tm. the initial speed of throw

Discussion

42.	A circular wire loop of radius R is placed inthe x -y plane centered at the origin O . A square loop of side a(a<R) having two turns is placed with its center at z=√3R along the axis of the circular wire loop, as shown in figure. The plane of the square loop makes an angle of 45∘ with the positive z -axis. If the mutual inductance between the loops is given by μ0a22p/2R, then value of p is (Answer upto two digit after decimal places)
Answer» A circular wire loop of radius $R$ is placed in the x -y plane centered at the origin $O$ . A square loop of side $a (a < R)$ having two turns is placed with its center at $z = \sqrt{3} R$ along the axis of the circular wire loop, as shown in figure. The plane of the square loop makes an angle of $45^{\circ}$ with the positive $z$ -axis. If the mutual inductance between the loops is given by $\frac{μ_{0} a^{2}}{2^{p / 2} R},$ then value of p is (Answer upto two digit after decimal places)

Discussion

43.	Find the derivative of xsinnx, where n is an integer.
Answer» Find the derivative of $\frac{x}{{sin}^{n} x}$ , where $n$ is an integer.

Discussion

44.	A capacitor is connected across a battery, which delivers a current of 1 A at an instant in the capacitor. The displacement current through the capacitor at that instant is
Answer» A capacitor is connected across a battery, which delivers a current of $1 A$ at an instant in the capacitor. The displacement current through the capacitor at that instant is

Discussion

45.	Four particles each of mass 2 kg are kept at the four corners of a square of edge length 2 m. The moment of inertia of the system about an axis which is perpendicular to the plane of the square and passing through centre of square isA 4 kg m2B 8 kg m2C 16 kg m2D 8√2 kg m2
Answer» Four particles each of mass 2 kg are kept at the four corners of a square of edge length 2 m. The moment of inertia of the system about an axis which is perpendicular to the plane of the square and passing through centre of square is A 4 kg m2 B 8 kg m2 C 16 kg m2 D 8√2 kg m2

Discussion

46.	Two signal x1(t) and x2(t) are given as x1(t)=6sinc(100t)cos(200t) and x2(t)=10sinc2(100t). If the Nyquist sampling rate are N1 and N2 respectively, then the value of N1N2 is ______(Upto 1 decimal place) 1.5
Answer» Two signal $x_{1} (t) a n d x_{2} (t)$ are given as $x_{1} (t) = 6 s i n c (100 t) c o s (200 t) a n d x_{2} (t) = 10 s i n c^{2} (100 t)$ . If the Nyquist sampling rate are $N_{1}$ and $N_{2}$ respectively, then the value of $\frac{N_{1}}{N_{2}}$ is ______(Upto 1 decimal place) 1.5

Discussion

47.	An ideal gas heat engine operates in a Carnot's cycle between 227∘C and 127∘C. It absorbs 6×104J at high temperature. The amount of heat converted into work is ....
Answer» An ideal gas heat engine operates in a Carnot's cycle between $227^{\circ}$ C and $127^{\circ}$ C. It absorbs $6 \times 10^{4} J$ at high temperature. The amount of heat converted into work is ....

Discussion

48.	Four capacitors with capacitance C1= 1 micro F,C2 =1.5 micro F, C3 =2.5 micro F and C4= 5 micro F are connected as shown and are connected to a 30 V source. The potential difference between points a and ''b'' is :
Answer» Four capacitors with capacitance C1= 1 micro F,C2 =1.5 micro F, C3 =2.5 micro F and C4= 5 micro F are connected as shown and are connected to a 30 V source. The potential difference between points a and ''b'' is :

Discussion

49.	OCH3 gives which effect +I or _ I effec
Answer» OCH3 gives which effect +I or _ I effec

Discussion

50.	A body of mass 0.05 kg travelling with a velocity of 5 m/s make angle of 300 with the wall as shown. The body rebounds with the same speed making an angle of 300 with the wall. Find the change in momentum of the body.
Answer» A body of mass $0.05 k g$ travelling with a velocity of $5 m / s$ make angle of $30^{0}$ with the wall as shown. The body rebounds with the same speed making an angle of $30^{0}$ with the wall. Find the change in momentum of the body.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross-sectional area A=10 cm2 and length 20 cm. It one of the solenoid has 300 turns and the other 400 turns, their mutual inductance is

A particle of mass m is moving in a horizontal circle of radius r with a centripetal force where k = 1 F=−kr2^r unit. The total energy of the particle is

a stone is thrown with a speed of 10m/s at an angle of projection 60 degree.find its height above the point of projection when it is at a horizontal dis†an ce 3m from the thrower?

A 10μ F capacitor is fully charged to a potential difference of 50 V. After removing the source voltage it is connected to an uncharged capacitor in parallel. Now the potential difference across them becomes 20 V. The capacitance of the second capacitor is

which of the following graph correctly represents the variation of C = -dV/V dP . with pressure P for an ideal gas at cons†an t temperature ?

In a semiconductor, the number density of intrinsic charge carriers at 27∘C is 1.5×1016 m−3. If the semiconductor is doped with impurity atom, the hole density increases to 4.5×1022 m−3. The electron density in the doped semiconductor is ×109 m−3.

A water pipe has an internal diameter of 10 cm. Water flows through it at the rate of 20 m/sec. The water jet strikes normally on a wall and falls dead. Find the force on the wall (in newtons). (round off to the nearest integer)[ρw=1000 kg/m3]

A long infinite current carrying wire is bent right angles as shown in figure. Find the magnetic field at point P which is equidistant from both wires at L.

Two tuning forks A and B vibrating simultaneously produce 5 beats. Frequency of B is 512. It is seen that if one arm of A is filed, then the number of beats increases. Frequency of A will be

a semicircular ring of radius 0.5 m is uniformly charged with a total charge of 1.4 * 10^-9 C. The electric field intensity at the centre of this ring is

In Bohr's model of hydrogen atom, the ratio of the period of revolution of an electron in the first orbit to that in the second orbit, is,

91.A positively charged pendulum is oscillating in a uniform electric field pointing upwards.Its time period as compared to that when it oscillates without electric field is more or less.

A circular road of radius 1000 m has banking angle 45∘. The maximum safe speed of a car having mass 2000 kg will be, if the coefficient of friction between tyre and road is 0.5

In Young's double – slit experiment, the y – coordinates of central maxima and 10th maxima are 2cm and 5cm, respectively. When the YDSE apparatus is immersed in a liquid of refractive index 1.5, the corresponding y – coordinates will be

A sphere of mass 50 g is suspended by a string in an electric field of intensity 5 NC−1 acting vertically upward. If the charge on the sphere is 4×10−3 C then the tension in the string is (g=10 ms−2)

If potential at the surface of earth is assigned zero value, then potential at the centre of earth will be ( mass M, radius R)

Two small blocks slide without losing contact with the surface along two frictionless tracks 1 & 2, starting at the same time with same initial velocity v. Track 1 is perfectly horizontal while track 2 has a dip in the middle as shown in the figure. Which body will reach the finish line first?

what is rigid body mechanics and is it compulsory that in it the direction of friction is same as the direction of motio

If a man of mass M jumps to the ground from a height h and his centre of mass moves a distance of x during the impact, the average force acting on him (assuming his retardation to be constant during his impact with the ground) is

A wheel of radius 1 meter rolls forward half a revolution on a horizontal ground. The magnitude of the displacement of the point of the wheel initially in contact with the ground is

Find the total torque acting on the body shown in the figure about the point O

A uniform rod of length L and weight W is suspended horizontally by two vertical ropes as shown. The first rope is attached to the left end of the rod while the second rope is attached a distance from the right end. The tension in the second rope is

Two equal charges of magnitude Q each are placed at a distance d apart. Their electrostatic energy is E. A third charge −Q2 is brought midway between these two charges. The electrostatic energy of the system is now

A proton moves along horizontal line and towards observer, the pattern of concentric circular field lines of magnetic field which produced due to its motion: 1. ACW, in horizontal plane 2. ACW, in vertical plane 3. CW, in horizontal plane 4. CW, in vertical plane Explain also

What is the magnitude of the gravitational force exerted by a 15 kg mass on a 25 kg mass separated by a distance of 25 cm. What is the acceleration produced in each mass?

If the threshold wavelength for sodium is 5420 ∘A, then the work function of sodium is

A particle was thrown with a speed of 20m/s at an angle of 30 degree with horizontal. Find its position along 'x' and 'y' axis at 1 second.

Two discs are rotating about the same axis passing through their centres and perpendicular to both discs' planes. If disc 1 has mass 5 kg and 30 cm radius and disc 2 has mass 7 kg and 60 cm radius, then find the moment of intertia about an axis OO'.

The ratio of height of image produced by concave lens to a height of object is 0.5.Assume focal length of the lens is 10 cm.find the distance of image from the lens

Explain why a car does not move when the force is applied on it by a person present inside the car?

Which of the following is true for photon

38.Rain is falling at the speed of 25root three m/s vertically. The wind blows west to east at a speed of 25 m/s . Find the velocity of rain w.r.t wind

Determine the volume contraction of a solid copper cube, 10 cm on an edge, when subjected to a hydraulic pressure of 7.0 × 10⁶ Pa.

A box of mass 70 kg is being lifted by a helicopter with the help of a rope, which can bear a maximum tension of 100 kg wt. The maximum acceleration with which helicopter should rise so that the rope does not break will be (Given g=9.8 m/s2)

A body of mass m1 collides head on elastically with a stationary body of mass m2. If velocities of m1 before and after the collision are v and –v/3 respectively then the value of m1/m2 is

For velocity – time graph of given figure The acceleration – time graph of the motion of the body is

If the resultant of the two forces has a magnitude smaller than the magnitude of larger force, the two forces must be

What is si unit of sound?

the position coordinates of a projectile thrown from ground are given by y=(12t-5t^2)m and x=5tm. the initial speed of throw

Find the derivative of xsinnx, where n is an integer.

A capacitor is connected across a battery, which delivers a current of 1 A at an instant in the capacitor. The displacement current through the capacitor at that instant is

Four particles each of mass 2 kg are kept at the four corners of a square of edge length 2 m. The moment of inertia of the system about an axis which is perpendicular to the plane of the square and passing through centre of square isA 4 kg m2B 8 kg m2C 16 kg m2D 8√2 kg m2

Two signal x1(t) and x2(t) are given as x1(t)=6sinc(100t)cos(200t) and x2(t)=10sinc2(100t). If the Nyquist sampling rate are N1 and N2 respectively, then the value of N1N2 is ______(Upto 1 decimal place) 1.5

An ideal gas heat engine operates in a Carnot's cycle between 227∘C and 127∘C. It absorbs 6×104J at high temperature. The amount of heat converted into work is ....

Four capacitors with capacitance C1= 1 micro F,C2 =1.5 micro F, C3 =2.5 micro F and C4= 5 micro F are connected as shown and are connected to a 30 V source. The potential difference between points a and ''b'' is :

OCH3 gives which effect +I or _ I effec

A body of mass 0.05 kg travelling with a velocity of 5 m/s make angle of 300 with the wall as shown. The body rebounds with the same speed making an angle of 300 with the wall. Find the change in momentum of the body.