50278 + Interview Questions in Physics Page 25 InterviewSolution

1201.	A particle is moving with speed 6 m/s along the direction of →A=2^i+2^j−^k, find the velocity (in m/s).
Answer» A particle is moving with speed $6 m / s$ along the direction of $\to A = 2^i + 2^j -^k$ , find the velocity (in $m / s$ ).

Discussion

1202.	81.The speed of a projectile at its maximum height is \sqrt{}3/2 times of its initial speed 'u' of projection.its range on the horizontal plane is
Answer» 81.The speed of a projectile at its maximum height is \sqrt{}3/2 times of its initial speed 'u' of projection.its range on the horizontal plane is

Discussion

1203.	A circular wire loop of radius R is placed in the xy-plane centred at the origin O. A square loop of side a(a<<R) having two turns is placed with its centre 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 respect to the z-axis. If the mutual inductance between the loops is given by μ0a22ρ2R, then the value of ρ is(integer only)
Answer» A circular wire loop of radius $R$ is placed in the $x y$ -plane centred at the origin $O$ . A square loop of side $a (a << R)$ having two turns is placed with its centre 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 respect to the $z$ -axis. If the mutual inductance between the loops is given by $\frac{μ_{0} a^{2}}{2^{\frac{ρ}{2}} R}$ , then the value of $ρ$ is(integer only)

Discussion

1204.	The velocity-time graph of a particle is shown below. What is the acceleration of the particle?
Answer» The velocity-time graph of a particle is shown below. What is the acceleration of the particle?

1204.

The velocity-time graph of a particle is shown below. What is the acceleration of the particle?

Answer»

The velocity-time graph of a particle is shown below. What is the acceleration of the particle?

Discussion

1205.	A cyclic wheel with 64 spokes is rotating with N rotations per second at right angles to horizontal component of earth’s magnetic field. The induced emf generated between its axle and rim is E. If the number of spokes is reduced to 32 and makes N rotations per second then the value of induced emf will be
Answer» A cyclic wheel with 64 spokes is rotating with N rotations per second at right angles to horizontal component of earth’s magnetic field. The induced emf generated between its axle and rim is E. If the number of spokes is reduced to 32 and makes N rotations per second then the value of induced emf will be

Discussion

1206.	A Volume V of a viscous liquid flow per a unit time due to pressure head △ P ,along a pipe Of diameter d and length l instead of this pipe ,a set of four pipe each ofdiameter d/2 and length 2l is connected to same pressure head △ P . Now the liquid flow per unit time is 1. V/4 2.V/8 3. V/16 4. V
Answer» A Volume V of a viscous liquid flow per a unit time due to pressure head △ P ,along a pipe Of diameter d and length l instead of this pipe ,a set of four pipe each ofdiameter d/2 and length 2l is connected to same pressure head △ P . Now the liquid flow per unit time is 1. V/4 2.V/8 3. V/16 4. V

Discussion

1207.	Differentiate between break and continue statements using examples.
Answer» Differentiate between break and continue statements using examples.

Discussion

1208.	A body initially moving with a velocity of 5 ms–1, attains a velocity of 25 ms–1 in 5 s. The acceleration of the body is: (Assume constant acceleration)
Answer» A body initially moving with a velocity of $5 {ms}^{- 1}$ , attains a velocity of $25 {ms}^{- 1}$ in $5 s$ . The acceleration of the body is: (Assume constant acceleration)

Discussion

1209.	A solid copper cube of edge 10 cm is subjected to a hydraulic pressure of 7×106 Pa. If compressibility of copper is 1140 GPa−1, then contraction in its volume will be
Answer» A solid copper cube of edge $10 cm$ is subjected to a hydraulic pressure of $7 \times 10^{6} Pa$ . If compressibility of copper is $\frac{1}{140} {GPa}^{- 1}$ , then contraction in its volume will be

Discussion

1210.	Write the charachteristics of a fuse.
Answer» Write the charachteristics of a fuse.

Discussion

1211.	Find the magnetic moment of a divalent ion in aqueous solution if its atomic no is 25?
Answer» Find the magnetic moment of a divalent ion in aqueous solution if its atomic no is 25?

Discussion

1212.	A charge q is distributed uniformly on the surface of a solid sphere of radius R. It is covered by a concentric hollow conducting sphere of radius 2R. The charge on outer surface of hollow sphere if it is earthed is
Answer» A charge $q$ is distributed uniformly on the surface of a solid sphere of radius $R$ . It is covered by a concentric hollow conducting sphere of radius $2 R$ . The charge on outer surface of hollow sphere if it is earthed is

Discussion

1213.	The bob of a simple pendulum (mass m and length l) dropped from a horizontal position strikes a block of the same mass elastically placed on a horizontal frictionless table. The K.E. of the block will be
Answer» The bob of a simple pendulum (mass m and length l) dropped from a horizontal position strikes a block of the same mass elastically placed on a horizontal frictionless table. The K.E. of the block will be

Discussion

1214.	146. A parallel monochromatic beam of light isincident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of incident beam. At the first maximum of the diffraction pattern, the phase difference between the rays coming from the edges of the slit is0/22
Answer» 146. A parallel monochromatic beam of light isincident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of incident beam. At the first maximum of the diffraction pattern, the phase difference between the rays coming from the edges of the slit is0/22

Discussion

1215.	P, Q and R are in a vertical line such that PQ QR. A ball at P is allowed tofall freely. What is the ratio of the times of descent through PQ and QR?
Answer» P, Q and R are in a vertical line such that PQ QR. A ball at P is allowed tofall freely. What is the ratio of the times of descent through PQ and QR?

Discussion

1216.	Why conservation laws other than the law of conservation of angular momentum don't have isotropy of space underlying them?
Answer» Why conservation laws other than the law of conservation of angular momentum don't have isotropy of space underlying them?

Discussion

1217.	An object moving at a speed of 5m/s towards a concave mirror of focal length 1m is at a dis†an ce of 9m.The average speed of the image i
Answer» An object moving at a speed of 5m/s towards a concave mirror of focal length 1m is at a dis†an ce of 9m.The average speed of the image i

Discussion

1218.	A capacitor of capacitance, C=25 μF is fully charged to 300 V. It is then connected across a 10 mH inductor. The resistance in the circuit is negligible. Find the frequency of oscillation of the current in the circuit.
Answer» A capacitor of capacitance, $C = 25 μ F$ is fully charged to $300 V$ . It is then connected across a $10 mH$ inductor. The resistance in the circuit is negligible. Find the frequency of oscillation of the current in the circuit.

Discussion

1219.	When a photon is emitted by a hydrogen atom, the photon carries a momentum with it. (a) Calculate the momentum carried by the photon when a hydrogen atom emits light of wavelength 656.3 nm. (b) With what speed does the atom recoil during this transition ? Take the mass of the hydrogen atom = 1.67×10−27 kg. (c) Find the kinetic energy of recoil of the atom.
Answer» When a photon is emitted by a hydrogen atom, the photon carries a momentum with it. (a) Calculate the momentum carried by the photon when a hydrogen atom emits light of wavelength 656.3 nm. (b) With what speed does the atom recoil during this transition ? Take the mass of the hydrogen atom = $1.67 \times 10^{- 27}$ kg. (c) Find the kinetic energy of recoil of the atom.

1219.

When a photon is emitted by a hydrogen atom, the photon carries a momentum with it. (a) Calculate the momentum carried by the photon when a hydrogen atom emits light of wavelength 656.3 nm. (b) With what speed does the atom recoil during this transition ? Take the mass of the hydrogen atom = 1.67×10−27 kg. (c) Find the kinetic energy of recoil of the atom.

Answer»

When a photon is emitted by a hydrogen atom, the photon carries a momentum with it.

(a) Calculate the momentum carried by the photon when a hydrogen atom emits light of wavelength 656.3 nm.

(b) With what speed does the atom recoil during this transition ? Take the mass of the hydrogen atom = $1.67 \times 10^{- 27}$ kg.

(c) Find the kinetic energy of recoil of the atom.

Discussion

1220.	A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r and resistance R one of the axisAB of the ring subtense and angle theta at the centre the value of magnetic field at the centre due to the current in the ring is Proportional to 2(180-thita) 1r Zero only if thita=180 Zero for all the values f thita
Answer» A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r and resistance R one of the axisAB of the ring subtense and angle theta at the centre the value of magnetic field at the centre due to the current in the ring is Proportional to 2(180-thita) 1r Zero only if thita=180 Zero for all the values f thita

Discussion

1221.	Three blocks, each of same mass m, are connected with wires w1and w2 of same cross-sectional area a Young's modulus Y. Neglecting friction the strain developed in wire w2 is
Answer» Three blocks, each of same mass m, are connected with wires $w_{1}$ and $w_{2}$ of same cross-sectional area a Young's modulus Y. Neglecting friction the strain developed in wire $w_{2}$ is

1221.

Three blocks, each of same mass m, are connected with wires w1and w2 of same cross-sectional area a Young's modulus Y. Neglecting friction the strain developed in wire w2 is

Answer»

Three blocks, each of same mass m, are connected with wires $w_{1}$ and $w_{2}$ of same cross-sectional area a Young's modulus Y. Neglecting friction the strain developed in wire $w_{2}$ is

Discussion

1222.	The moment of inertia of a body about a given axis is 1.2 kg−m2. Initially, the body is at rest. In order to produce a rotational kinetic energy of 1500 J, an angular acceleration of 25 rad/s2 must be applied about that axis for a duration of
Answer» The moment of inertia of a body about a given axis is $1.2 kg - m^{2}$ . Initially, the body is at rest. In order to produce a rotational kinetic energy of $1500 J$ , an angular acceleration of $25 {rad/s}^{2}$ must be applied about that axis for a duration of

Discussion

1223.	Three points masses each of mass m rotate in a circle of radius r with constant angular velocity ω due to their mutual gravitational attraction. If at any instant, the masses are on the vertex of an equilateral triangle of side a, then the value of ω is
Answer» Three points masses each of mass m rotate in a circle of radius r with constant angular velocity $ω$ due to their mutual gravitational attraction. If at any instant, the masses are on the vertex of an equilateral triangle of side a, then the value of $ω$ is

Discussion

1224.	The percentage increase in the impedance of an a.c circuit, when its power factor changes form 0.866 to 0.5 is (if resistance of the circuit remains constant)
Answer» The percentage increase in the impedance of an a.c circuit, when its power factor changes form $0.866$ to $0.5$ is (if resistance of the circuit remains constant)

Discussion

1225.	43. A particle is thrown with kinetic energy 100J straight up on a rough inclined plane of inclination 45 degree and coefficient of friction is 0.2. The work done against friction before particle comes to rest is 16.6J 100J 13J 33.3J
Answer» 43. A particle is thrown with kinetic energy 100J straight up on a rough inclined plane of inclination 45 degree and coefficient of friction is 0.2. The work done against friction before particle comes to rest is 16.6J 100J 13J 33.3J

Discussion

1226.	The maximum tension that an inextensible ring of radius 1 m and mass density 0.1 kgm−1 can bear is 40 N. The maximum angular velocity with which it can be rotated in a circular path is
Answer» The maximum tension that an inextensible ring of radius $1 m$ and mass density $0.1 {kgm}^{- 1}$ can bear is $40 N$ . The maximum angular velocity with which it can be rotated in a circular path is

Discussion

1227.	A container contains two immiscible liquids of density ρ1 and ρ2 (ρ2>ρ1). A capillary of radius r is inserted in the liquids so that its bottom reaches upto denser liquid. Denser liquid rises in capillary and attains a height h which is also equal to column length of lighter liquid. Assuming zero contact angle, find surface tension of heavier liquid.
Answer» A container contains two immiscible liquids of density $ρ_{1}$ and $ρ_{2}$ $(ρ_{2} > ρ_{1})$ . A capillary of radius $r$ is inserted in the liquids so that its bottom reaches upto denser liquid. Denser liquid rises in capillary and attains a height $h$ which is also equal to column length of lighter liquid. Assuming zero contact angle, find surface tension of heavier liquid.

Discussion

1228.	A cubical block of side L and mass m rests on a rough horizontal surface with coefficient of friction u. A horizontal force is applied on the block.If coefficient of friction is sufficiently high so that the block does not slide before toppling, then the minimum force required to topple the block is
Answer» A cubical block of side L and mass m rests on a rough horizontal surface with coefficient of friction u. A horizontal force is applied on the block.If coefficient of friction is sufficiently high so that the block does not slide before toppling, then the minimum force required to topple the block is

Discussion

1229.	A nucleus of mass number A originally at rest emits α-particle with speed v. What will be recoil speed of the daughter nucleus? (correct answer + 1, wrong answer - 0.25)
Answer» A nucleus of mass number $A$ originally at rest emits $α$ -particle with speed $v$ . What will be recoil speed of the daughter nucleus? (correct answer + 1, wrong answer - 0.25)

Discussion

1230.	A ball takes t second to fall from a height h1 and 2t seconds to fall from a height h2. Then h1h2 is:
Answer» A ball takes $t$ second to fall from a height $h_{1}$ and $2 t$ seconds to fall from a height $h_{2}$ . Then $\frac{h_{1}}{h_{2}}$ is:

Discussion

1231.	A projectile is fired horizontally with a velocity 98 m/s from the top of a hill 490 m high. Find the coordinates of the projectile at time t=10 sec. Take origin at the top of hill and vertically downwards as positive y-direction, positive x-direction along the direction of horizontal projection.[g=9.8 m/s2]
Answer» A projectile is fired horizontally with a velocity $98 m/s$ from the top of a hill $490 m$ high. Find the coordinates of the projectile at time $t = 10 sec$ . Take origin at the top of hill and vertically downwards as positive $y$ -direction, positive $x$ -direction along the direction of horizontal projection. $[g = 9.8 {m/s}^{2}]$

Discussion

1232.	A proton is fired perpendicular into the magnetic field B with kinetic energy E and then it revolves in a circular path of radius R. If the proton is fired perpendicular to the magnetic field of 4B and in both case, radius of circular path is same, then the kinetic energy of proton in second case should be ?
Answer» A proton is fired perpendicular into the magnetic field B with kinetic energy E and then it revolves in a circular path of radius R. If the proton is fired perpendicular to the magnetic field of 4B and in both case, radius of circular path is same, then the kinetic energy of proton in second case should be ?

Discussion

1233.	A professor reads a greeting card received on his 50th birthday with +2.5 D glass keeping the card 25 cm away. Ten years later, when he reads his farewell letter with the same glasses, he has to keep the letter 50 cm away. The power of lens the professor should use now is
Answer» A professor reads a greeting card received on his $50^{t h}$ birthday with $+ 2.5 D$ glass keeping the card $25 cm$ away. Ten years later, when he reads his farewell letter with the same glasses, he has to keep the letter $50 cm$ away. The power of lens the professor should use now is

Discussion

1234.	A current carrying circular loop is placed in a uniform magnetic field B, the potential energy is minimum when the magnetic moment of the loop is
Answer» A current carrying circular loop is placed in a uniform magnetic field $B$ , the potential energy is minimum when the magnetic moment of the loop is

Discussion

1235.	Explain why paramagnetic materials and ferromagnetic materials are attracted and strongly attracted by external magnetic field?
Answer» Explain why paramagnetic materials and ferromagnetic materials are attracted and strongly attracted by external magnetic field?

Discussion

1236.	Question 11Two identical bullets are fired one by a light rifle and another by a heavy rifle with the same force. Which rifle will hurt the shoulder more and why?
Answer» Question 11 Two identical bullets are fired one by a light rifle and another by a heavy rifle with the same force. Which rifle will hurt the shoulder more and why?

Discussion

1237.	If the Force is zero will the work done be also zero? OR If the s(displacement) is zero will the work done be zero? In which case the Work done will always be zero?
Answer» If the Force is zero will the work done be also zero? OR If the s(displacement) is zero will the work done be zero? In which case the Work done will always be zero?

Discussion

1238.	Figure given below shows an ultrasound flow meter with the transducers separated by a distance 100 mm with the line joining the transducers making an angle 60o with the direction of the flow. The transit time difference between upstream and downstream measurements is 20 ns with the sound velocity in the medium being 1000 m/s. Assuming that the size of the transducers is very small as compared to the diameter of the pipe, the flow velocity is
Answer» Figure given below shows an ultrasound flow meter with the transducers separated by a distance $100 m m$ with the line joining the transducers making an angle $60^{o}$ with the direction of the flow. The transit time difference between upstream and downstream measurements is $20 n s$ with the sound velocity in the medium being $1000 m / s$ . Assuming that the size of the transducers is very small as compared to the diameter of the pipe, the flow velocity is

Discussion

1239.	The planet Jupiter has an atmosphere composed mainly of methane at a temperature of −130∘C Find the velocity of sound on the planet. Assume γ of the gas inside Jupiter to be 1.3. (R=8.36 J mol−1 K−1)
Answer» The planet Jupiter has an atmosphere composed mainly of methane at a temperature of $- 130^{\circ} C$ Find the velocity of sound on the planet. Assume $γ$ of the gas inside Jupiter to be 1.3. $(R = 8.36 J m o l^{- 1} K^{- 1})$

Discussion

1240.	Image is formed for the short sighted person at [AFMC 1988]
Answer» Image is formed for the short sighted person at [AFMC 1988]

1240.

Image is formed for the short sighted person at [AFMC 1988]

Answer»

Image is formed for the short sighted person at

[AFMC 1988]

Discussion

1241.	The first emission line of Balmer series for H-spectrum has the wave number equal to........ cm−1.
Answer» The first emission line of Balmer series for H-spectrum has the wave number equal to........ $c m^{- 1}$ .

Discussion

1242.	The motion of a charged particle can be used to distinguish between a magnetic field and electric field in a certain region by firing the charge??1 Perpendicular to field2 Parallel to field3 From opposite directions 4 With different speed
Answer» The motion of a charged particle can be used to distinguish between a magnetic field and electric field in a certain region by firing the charge?? 1 Perpendicular to field 2 Parallel to field 3 From opposite directions 4 With different speed

Discussion

1243.	What are the conditions for the potential energy acting between two particles be decreased
Answer» What are the conditions for the potential energy acting between two particles be decreased

Discussion

1244.	IR 40 mA particle of mass m is released from rest and follows a parabolic path as shown. Assuming that thedisplacement of the mass from the origin is small, which graph correctly depicts the position of the particle[AIPMT (Prelims)-2011]as a function of time?E0A(4)(3)(2)(1)At
Answer» IR 40 m A particle of mass m is released from rest and follows a parabolic path as shown. Assuming that the displacement of the mass from the origin is small, which graph correctly depicts the position of the particle [AIPMT (Prelims)-2011] as a function of time? E0A (4) (3) (2) (1) At

Discussion

1245.	Paragraph for below questionनीचे दिए गए प्रश्न के लिए अनुच्छेदA constant horizontal force F acts on top of a uniform disc (M, R) placed on rough horizontal surface as shown. If there is no slippage at point of contact, then answer the following question.दर्शाए अनुसार खुरदरे क्षैतिज पृष्ठ पर रखी एक समरूप डिस्क (M, R) के शीर्ष पर एक नियत क्षैतिज बल F कार्य करता है। यदि सम्पर्क बिन्दु पर कोई फिसलन नहीं है, तब निम्नलिखित प्रश्न का उत्तर दीजिए।Q. Acceleration of centre of mass isप्रश्न - द्रव्यमान केन्द्र का त्वरण है
Answer» Paragraph for below question नीचे दिए गए प्रश्न के लिए अनुच्छेद A constant horizontal force F acts on top of a uniform disc (M, R) placed on rough horizontal surface as shown. If there is no slippage at point of contact, then answer the following question. दर्शाए अनुसार खुरदरे क्षैतिज पृष्ठ पर रखी एक समरूप डिस्क (M, R) के शीर्ष पर एक नियत क्षैतिज बल F कार्य करता है। यदि सम्पर्क बिन्दु पर कोई फिसलन नहीं है, तब निम्नलिखित प्रश्न का उत्तर दीजिए। Q. Acceleration of centre of mass is प्रश्न - द्रव्यमान केन्द्र का त्वरण है

Discussion

1246.	If the door of a refrigerator is kept open, then which of the following is true?
Answer» If the door of a refrigerator is kept open, then which of the following is true?

Discussion

1247.	Find iind for the ring of radius R if B=∝t2. The resistance/length is λ.
Answer» Find $i_{i n d}$ for the ring of radius R if $B =\propto t^{2}$ . The resistance/length is $λ$ .

Discussion

1248.	The parabolic path of projectile is Y= x√3−x260 its maximum height is
Answer» The parabolic path of projectile is Y= $\frac{x}{\sqrt{3}} - \frac{x^{2}}{60}$ its maximum height is

Discussion

1249.	Relation between Angular ve Linear velocity and Linearvelocity.
Answer» Relation between Angular ve Linear velocity and Linearvelocity.

Discussion

1250.	9. If we move upper side from central maxima of wgite light then which colour will be first
Answer» 9. If we move upper side from central maxima of wgite light then which colour will be first

Discussion

Explore topic-wise InterviewSolutions in .

A particle is moving with speed 6 m/s along the direction of →A=2^i+2^j−^k, find the velocity (in m/s).

81.The speed of a projectile at its maximum height is \sqrt{}3/2 times of its initial speed 'u' of projection.its range on the horizontal plane is

The velocity-time graph of a particle is shown below. What is the acceleration of the particle?

Differentiate between break and continue statements using examples.

A body initially moving with a velocity of 5 ms–1, attains a velocity of 25 ms–1 in 5 s. The acceleration of the body is: (Assume constant acceleration)

A solid copper cube of edge 10 cm is subjected to a hydraulic pressure of 7×106 Pa. If compressibility of copper is 1140 GPa−1, then contraction in its volume will be

Write the charachteristics of a fuse.

Find the magnetic moment of a divalent ion in aqueous solution if its atomic no is 25?

A charge q is distributed uniformly on the surface of a solid sphere of radius R. It is covered by a concentric hollow conducting sphere of radius 2R. The charge on outer surface of hollow sphere if it is earthed is

The bob of a simple pendulum (mass m and length l) dropped from a horizontal position strikes a block of the same mass elastically placed on a horizontal frictionless table. The K.E. of the block will be

P, Q and R are in a vertical line such that PQ QR. A ball at P is allowed tofall freely. What is the ratio of the times of descent through PQ and QR?

Why conservation laws other than the law of conservation of angular momentum don't have isotropy of space underlying them?

An object moving at a speed of 5m/s towards a concave mirror of focal length 1m is at a dis†an ce of 9m.The average speed of the image i

A capacitor of capacitance, C=25 μF is fully charged to 300 V. It is then connected across a 10 mH inductor. The resistance in the circuit is negligible. Find the frequency of oscillation of the current in the circuit.

Three blocks, each of same mass m, are connected with wires w1and w2 of same cross-sectional area a Young's modulus Y. Neglecting friction the strain developed in wire w2 is

The moment of inertia of a body about a given axis is 1.2 kg−m2. Initially, the body is at rest. In order to produce a rotational kinetic energy of 1500 J, an angular acceleration of 25 rad/s2 must be applied about that axis for a duration of

Three points masses each of mass m rotate in a circle of radius r with constant angular velocity ω due to their mutual gravitational attraction. If at any instant, the masses are on the vertex of an equilateral triangle of side a, then the value of ω is

The percentage increase in the impedance of an a.c circuit, when its power factor changes form 0.866 to 0.5 is (if resistance of the circuit remains constant)

43. A particle is thrown with kinetic energy 100J straight up on a rough inclined plane of inclination 45 degree and coefficient of friction is 0.2. The work done against friction before particle comes to rest is 16.6J 100J 13J 33.3J

The maximum tension that an inextensible ring of radius 1 m and mass density 0.1 kgm−1 can bear is 40 N. The maximum angular velocity with which it can be rotated in a circular path is

A nucleus of mass number A originally at rest emits α-particle with speed v. What will be recoil speed of the daughter nucleus? (correct answer + 1, wrong answer - 0.25)

A ball takes t second to fall from a height h1 and 2t seconds to fall from a height h2. Then h1h2 is:

A professor reads a greeting card received on his 50th birthday with +2.5 D glass keeping the card 25 cm away. Ten years later, when he reads his farewell letter with the same glasses, he has to keep the letter 50 cm away. The power of lens the professor should use now is

A current carrying circular loop is placed in a uniform magnetic field B, the potential energy is minimum when the magnetic moment of the loop is

Explain why paramagnetic materials and ferromagnetic materials are attracted and strongly attracted by external magnetic field?

Question 11Two identical bullets are fired one by a light rifle and another by a heavy rifle with the same force. Which rifle will hurt the shoulder more and why?

If the Force is zero will the work done be also zero? OR If the s(displacement) is zero will the work done be zero? In which case the Work done will always be zero?

The planet Jupiter has an atmosphere composed mainly of methane at a temperature of −130∘C Find the velocity of sound on the planet. Assume γ of the gas inside Jupiter to be 1.3. (R=8.36 J mol−1 K−1)

Image is formed for the short sighted person at [AFMC 1988]

The first emission line of Balmer series for H-spectrum has the wave number equal to........ cm−1.

The motion of a charged particle can be used to distinguish between a magnetic field and electric field in a certain region by firing the charge??1 Perpendicular to field2 Parallel to field3 From opposite directions 4 With different speed

What are the conditions for the potential energy acting between two particles be decreased

IR 40 mA particle of mass m is released from rest and follows a parabolic path as shown. Assuming that thedisplacement of the mass from the origin is small, which graph correctly depicts the position of the particle[AIPMT (Prelims)-2011]as a function of time?E0A(4)(3)(2)(1)At

If the door of a refrigerator is kept open, then which of the following is true?

Find iind for the ring of radius R if B=∝t2. The resistance/length is λ.

The parabolic path of projectile is Y= x√3−x260 its maximum height is

Relation between Angular ve Linear velocity and Linearvelocity.

9. If we move upper side from central maxima of wgite light then which colour will be first