50278 + Interview Questions in Physics Page 11 InterviewSolution

501.	Lift A is going up with velocity 20m/s and acceleration as 8m/s2 in the downward direction. While lift B is going down with 10m/s and acceleration of +2m/s2 in upward direction. At this moment a bolt in the ceiling of lift A gets loose and falls. Height of the lift is 16 m.What is the velocity of bolt relative to lift B when it hits the floor of A.?
Answer» Lift A is going up with velocity 20m/s and acceleration as $8 m / s^{2}$ in the downward direction. While lift B is going down with 10m/s and acceleration of $+ 2 m / s^{2}$ in upward direction. At this moment a bolt in the ceiling of lift A gets loose and falls. Height of the lift is 16 m. What is the velocity of bolt relative to lift B when it hits the floor of A.?

Discussion

502.	The mean radius of the earth is R, its angular speed on its own axis is ω and the acceleration due to gravity at earth's surface is g. The cube of the radius of the orbit of a geostationary satellite will be
Answer» The mean radius of the earth is R, its angular speed on its own axis is $ω$ and the acceleration due to gravity at earth's surface is g. The cube of the radius of the orbit of a geostationary satellite will be

Discussion

503.	In a certain material for which μ=4 the magnetic field is given by,¯¯¯¯¯H=2δx+4δy−8δzA/m The corresponding magnetic energy density is ___ μJ/m2211
Answer» In a certain material for which $μ = 4$ the magnetic field is given by, $¯ ¯¯¯ ¯ H = 2 δ_{x} + 4 δ_{y} - 8 δ_{z} A / m$ The corresponding magnetic energy density is ___ $μ J / m^{2}$ 211

Discussion

504.	Two fixed solid spheres of charges Q and kQ are separated by a distance 6R. A charge -q is to be projected along the line joining their centres, so that it can reach the surface of other solid sphere of charge kQ.ii) if we do not want to give any velocity what should be minimum value of k
Answer» Two fixed solid spheres of charges Q and kQ are separated by a distance 6R. A charge -q is to be projected along the line joining their centres, so that it can reach the surface of other solid sphere of charge kQ. ii) if we do not want to give any velocity what should be minimum value of k

Discussion

505.	Two semi-infinitely long straight current carrying conductors are in form of an L−shape as shown in figure. The common end is at the origin. What is the value of magnetic field at a point (a, b), if both the conductors carrying same current I?
Answer» Two semi-infinitely long straight current carrying conductors are in form of an $L -$ shape as shown in figure. The common end is at the origin. What is the value of magnetic field at a point $(a, b)$ , if both the conductors carrying same current $I$ ?

Discussion

506.	What will be work done in supplying 400 calories of heat to a system?
Answer» What will be work done in supplying $400 calories$ of heat to a system?

Discussion

507.	In case of metal carbonyls, why does the bond order of CO decreases if the number of d electrons increases?
Answer» In case of metal carbonyls, why does the bond order of CO decreases if the number of d electrons increases?

Discussion

508.	A very long thin charged rod is placed along x-axis with its midpoint at the origin. The charge per unit length of the rod is +lambda, the electric field vector at y = – a on y-axis is
Answer» A very long thin charged rod is placed along x-axis with its midpoint at the origin. The charge per unit length of the rod is +lambda, the electric field vector at y = – a on y-axis is

Discussion

509.	When the object is placed beyond 2F in front of convex lens, the image is formed
Answer» When the object is placed beyond 2F in front of convex lens, the image is formed

Discussion

510.	9.Is all reversible cycles has same efficiency. And reversible cycles have more efficiency than irreversible one.
Answer» 9.Is all reversible cycles has same efficiency. And reversible cycles have more efficiency than irreversible one.

Discussion

511.	A liquid flows in the tube from left to right as shown in figure. A1 and A2 are the area of cross - sections of the portions of the tube as shown. If speed of liquid in these portions be V1 & V2 respectively . The ratio of speeds V1V2 will be
Answer» A liquid flows in the tube from left to right as shown in figure. $A_{1}$ and $A_{2}$ are the area of cross - sections of the portions of the tube as shown. If speed of liquid in these portions be $V_{1} & V_{2}$ respectively . The ratio of speeds $\frac{V_{1}}{V_{2}}$ will be

Discussion

512.	The position of a particle is given by r = 3.0t ˆi − 2.0t 2 ˆj + 4.0 kˆ m where t is in seconds and the coefficients have the proper units for r to be in metres. (a) Find the v and a of the particle? (b) What is the magnitude and direction of velocity of the particle at t = 2.0 s ?
Answer» The position of a particle is given by r = 3.0t ˆi − 2.0t 2 ˆj + 4.0 kˆ m where t is in seconds and the coefficients have the proper units for r to be in metres. (a) Find the v and a of the particle? (b) What is the magnitude and direction of velocity of the particle at t = 2.0 s ?

Discussion

513.	An alternating current is given by i=4cos50t−3sin50t. The rms current is given by
Answer» An alternating current is given by $i = 4 cos 50 t - 3 sin 50 t$ . The rms current is given by

Discussion

514.	Suggest a suitable physical situation for each of the following graphs (Fig 3.22):
Answer» Suggest a suitable physical situation for each of the following graphs (Fig 3.22):

Discussion

515.	The net capacity between the points A and B in the following circuit will be
Answer» The net capacity between the points $A$ and $B$ in the following circuit will be

Discussion

516.	An object travels from A with initial velocity of 0 m/s and takes time t1 to move from A to B and time T2 TO MOVE FROM B TO C . If the acceleration remains constant throughout the journey , then find t1:t2
Answer» An object travels from A with initial velocity of 0 m/s and takes time t1 to move from A to B and time T2 TO MOVE FROM B TO C . If the acceleration remains constant throughout the journey , then find t1:t2

Discussion

517.	From a disc of radius R and mass M ,a circular hole of diameter R whose rim passes through the centre is cut what is the moment of inertia of the remaining part of the disc about a perpendicular axis passing through the centre?
Answer» From a disc of radius R and mass M ,a circular hole of diameter R whose rim passes through the centre is cut what is the moment of inertia of the remaining part of the disc about a perpendicular axis passing through the centre?

Discussion

518.	A string vibrates in 5 segments to a frequency of 480 Hz. The frequency that will cause it to vibrate in 2 segments will be
Answer» A string vibrates in $5$ segments to a frequency of $480 Hz$ . The frequency that will cause it to vibrate in $2$ segments will be

Discussion

519.	42.why are dibromides and dichlorides of selenium not stable?
Answer» 42.why are dibromides and dichlorides of selenium not stable?

Discussion

520.	The figure shows a square loop, each side of 10 cm in the xy−plane, with its centre at the origin. An infinite wire is at z=12 cm above y−axis. If the torque on loop due to magnetic force is expressed as x×10−7 N-m, fill the value of x.
Answer» The figure shows a square loop, each side of $10 cm$ in the $x y -$ plane, with its centre at the origin. An infinite wire is at $z = 12 cm$ above $y -$ axis. If the torque on loop due to magnetic force is expressed as $x \times 10^{- 7} N-m$ , fill the value of $x$ .

Discussion

521.	6.A point moves rectilinearly. Its displacement xat time t is given byx2 t + 1. Its accelerationat time t is(1)(2)13(3)(t)-
Answer» 6.A point moves rectilinearly. Its displacement xat time t is given byx2 t + 1. Its accelerationat time t is(1)(2)13(3)(t)-

Discussion

522.	The kinetic energy of one electron is 2.8*10-13j .what is the de broglie wavelength
Answer» The kinetic energy of one electron is 2.8*10-13j .what is the de broglie wavelength

Discussion

523.	The given figure shows three long straight wires carrying identical current i and kept parallel at equally spaced distance. The direction of current in each wire has been shown in figure.The magnetic force experienced by the wire a, b and c are Fa, Fb and Fc respectively. The forces experienced by the wire will have the order of strength as:
Answer» The given figure shows three long straight wires carrying identical current $i$ and kept parallel at equally spaced distance. The direction of current in each wire has been shown in figure.The magnetic force experienced by the wire $a$ , $b$ and $c$ are $F_{a}$ , $F_{b}$ and $F_{c}$ respectively. The forces experienced by the wire will have the order of strength as:

Discussion

524.	The unit of length,velocity and force are doubled. which of the following is the correct change in the other units? A) unit of time is doubledB) unit of mass is doubled C) Unit of momentum is doubled D) unit of energy is doubled
Answer» The unit of length,velocity and force are doubled. which of the following is the correct change in the other units? A) unit of time is doubled B) unit of mass is doubled C) Unit of momentum is doubled D) unit of energy is doubled

Discussion

525.	For a black body, the absorptive power is -
Answer» For a black body, the absorptive power is -

Discussion

526.	3 A of current is flowing in a linear conductor having a length of 40 cm. The conductor is placed in a magnetic field of strength 500 gauss and makes an angle of with the direction of the field. It experiences a force of magnitude [MP PET 1993]
Answer» 3 A of current is flowing in a linear conductor having a length of 40 cm. The conductor is placed in a magnetic field of strength 500 gauss and makes an angle of with the direction of the field. It experiences a force of magnitude [MP PET 1993]

Discussion

527.	Why is the shape of rainbow spherical?
Answer» Why is the shape of rainbow spherical?

Discussion

528.	In an LRC circuit, the power factor changes from 12 to 14 then, what is the increase in impedance (the resistance of the resistor in the circuit is constant) ?
Answer» In an $L R C$ circuit, the power factor changes from $\frac{1}{2}$ to $\frac{1}{4}$ then, what is the increase in impedance (the resistance of the resistor in the circuit is constant) ?

Discussion

529.	An ideal gas has adiabatic exponent γ. If it expands according to law P=α V where α is cons†an t. For this process the bulk modulus of the gas
Answer» An ideal gas has adiabatic exponent γ. If it expands according to law P=α V where α is cons†an t. For this process the bulk modulus of the gas

Discussion

530.	Three girls skating on a circular ice ground of radius 200 m start from a point P on the edge of the ground and reach a point Q diametrically opposite to P following different paths as shown in Fig. 4.20. What is the magnitude of the displacement vector for each ? For which girl is this equal to the actual length of path skate ?
Answer» Three girls skating on a circular ice ground of radius 200 m start from a point P on the edge of the ground and reach a point Q diametrically opposite to P following different paths as shown in Fig. 4.20. What is the magnitude of the displacement vector for each ? For which girl is this equal to the actual length of path skate ?

Discussion

531.	1. What is the law of conservation of linear momentum? 2. What is the law of conservation of angular momentum?
Answer» 1. What is the law of conservation of linear momentum? 2. What is the law of conservation of angular momentum?

Discussion

532.	At a certain section at a distance 'x' from one of the supports of a simply supported beam, the intensity of loading bending moment and shear force are wx,Mx and Vx respectively. If the intensity of loading is varying continuously along the length of the beam then the invalid relation is
Answer» At a certain section at a distance 'x' from one of the supports of a simply supported beam, the intensity of loading bending moment and shear force are $w_{x}, M_{x}$ and $V_{x}$ respectively. If the intensity of loading is varying continuously along the length of the beam then the invalid relation is

Discussion

533.	A capacitor of capacitance C0 is charged to a potential V0 and then isolated. A small capacitor C is then charged from C0, discharged and charged again; the process being repeated n times. Due to this, potential of the larger capacitor is decreased to V. The value of C is
Answer» A capacitor of capacitance $C_{0}$ is charged to a potential $V_{0}$ and then isolated. A small capacitor $C$ is then charged from $C_{0}$ , discharged and charged again; the process being repeated n times. Due to this, potential of the larger capacitor is decreased to $V$ . The value of $C$ is

Discussion

534.	how to know the direction of induced current in a circular loop
Answer» how to know the direction of induced current in a circular loop

Discussion

535.	For the case of an ideal gas, find the equation of the process in which the molar heat capacity varies as C=Cv+αT2, where α is constant. Take V0 to be the initial volume of the gas.
Answer» For the case of an ideal gas, find the equation of the process in which the molar heat capacity varies as $C = C_{v} + α T^{2}$ , where $α$ is constant. Take $V_{0}$ to be the initial volume of the gas.

Discussion

536.	If the sum of all forces is zero, what are the magnitudes of the unknown forces x and y?
Answer» If the sum of all forces is zero, what are the magnitudes of the unknown forces $x$ and $y$ ?

Discussion

537.	A 12.5 eV electron beam is used to bombard gaseous hydrogen atroom temperature. What series of wavelengths will be emitted?
Answer» A 12.5 eV electron beam is used to bombard gaseous hydrogen atroom temperature. What series of wavelengths will be emitted?

Discussion

538.	In the figure shown, find the force exerted by the pulley at the support. Take g=10 m/s2 and assume that all surfaces are smooth.
Answer» In the figure shown, find the force exerted by the pulley at the support. Take $g = 10 {m/s}^{2}$ and assume that all surfaces are smooth.

Discussion

539.	Figure shows an adiabatic cylindrical tube of volume Vo divided in two parts by a frictionless adiabatic seperator. Initially, the seperator is kept in the middle, an ideal gas at pressure P1 and temperature T1 is injected into the left part and another ideal gas at pressure P2 and temperature T2 is injecteed into the right part. Cp/Cv=γ is the same for both the gases. The seperator is slid slowely and is released at a position where it can stay in equlibrium. Find (a) The volumes of the two parts. (b) The heat given to the gas in the left part and (c) The final common pressure of the gases.
Answer» Figure shows an adiabatic cylindrical tube of volume $V_{o}$ divided in two parts by a frictionless adiabatic seperator. Initially, the seperator is kept in the middle, an ideal gas at pressure $P_{1}$ and temperature $T_{1}$ is injected into the left part and another ideal gas at pressure $P_{2}$ and temperature $T_{2}$ is injecteed into the right part. $C_{p} / C_{v} = γ$ is the same for both the gases. The seperator is slid slowely and is released at a position where it can stay in equlibrium. Find (a) The volumes of the two parts. (b) The heat given to the gas in the left part and (c) The final common pressure of the gases.

539.

Figure shows an adiabatic cylindrical tube of volume Vo divided in two parts by a frictionless adiabatic seperator. Initially, the seperator is kept in the middle, an ideal gas at pressure P1 and temperature T1 is injected into the left part and another ideal gas at pressure P2 and temperature T2 is injecteed into the right part. Cp/Cv=γ is the same for both the gases. The seperator is slid slowely and is released at a position where it can stay in equlibrium. Find (a) The volumes of the two parts. (b) The heat given to the gas in the left part and (c) The final common pressure of the gases.

Answer»

Figure shows an adiabatic cylindrical tube of volume $V_{o}$ divided in two parts by a frictionless adiabatic seperator. Initially, the seperator is kept in the middle, an ideal gas at pressure $P_{1}$ and temperature $T_{1}$ is injected into the left part and another ideal gas at pressure $P_{2}$ and temperature $T_{2}$ is injecteed into the right part. $C_{p} / C_{v} = γ$ is the same for both the gases. The seperator is slid slowely and is released at a position where it can stay in equlibrium. Find

(a) The volumes of the two parts.

(b) The heat given to the gas in the left part and

(c) The final common pressure of the gases.

Discussion

540.	how velocity changes with speed and didection or with both?
Answer» how velocity changes with speed and didection or with both?

Discussion

541.	Assuming potential energy ′U′ at ground level to be zero. All objects are made up of same material. Up= Potential energy of solid sphere UQ= Potential energy of solid cube UR= Potential energy of solid cone US= Potential energy of solid cylinder
Answer» Assuming potential energy $^{'} U^{'}$ at ground level to be zero. All objects are made up of same material. $U_{p} =$ Potential energy of solid sphere $U_{Q} =$ Potential energy of solid cube $U_{R} =$ Potential energy of solid cone $U_{S} =$ Potential energy of solid cylinder

Discussion

542.	8.Two simple harmonic motions are represented by the equations y1=0.1sin(100πt + π/3) and y2=0.1cos100πt. The phase difference of the velocity of particle 1, with respect to the velocity of particle 2 will be?
Answer» 8.Two simple harmonic motions are represented by the equations y1=0.1sin(100πt + π/3) and y2=0.1cos100πt. The phase difference of the velocity of particle 1, with respect to the velocity of particle 2 will be?

Discussion

543.	STATEMENT-1: The formula connecting u, and f for a sphericalmirror is valid only for those mirrors whose sizes are very smallcompared to their radii of curvature.STATEMENT-2: The laws of reflection are strictly valid for planesurfaces but not for large spherical surfaces.(a) Statement-1 is True, Statement-2 is True; Statement-2 is acorrect explantion for Statement-1(b) Statement-1 is True, Statement-2 is True; Statement-2 isnot a correct explanation for Statement-1.(c) Statement-1 is True, Statement-2 is False.(d) Statement-1 is False, Statement-2 is True.
Answer» STATEMENT-1: The formula connecting u, and f for a sphericalmirror is valid only for those mirrors whose sizes are very smallcompared to their radii of curvature.STATEMENT-2: The laws of reflection are strictly valid for planesurfaces but not for large spherical surfaces.(a) Statement-1 is True, Statement-2 is True; Statement-2 is acorrect explantion for Statement-1(b) Statement-1 is True, Statement-2 is True; Statement-2 isnot a correct explanation for Statement-1.(c) Statement-1 is True, Statement-2 is False.(d) Statement-1 is False, Statement-2 is True.

Discussion

544.	20. The average force necessary to stop a hammer with momentum p Ns in 0.5 s isan(2) pN(1) 2p NPN(4)(3) 4p NFRAME OFQl2
Answer» 20. The average force necessary to stop a hammer with momentum p Ns in 0.5 s isan(2) pN(1) 2p NPN(4)(3) 4p NFRAME OFQl2

Discussion

545.	1.If X is the total no. of collision which a gas molecule register with others per unit time under particular conditions, then the collision frequency of the gas containing N molecule per unit volume is
Answer» 1.If X is the total no. of collision which a gas molecule register with others per unit time under particular conditions, then the collision frequency of the gas containing N molecule per unit volume is

Discussion

546.	Two men (A & B) of mass 50 kg and 100 kg are standing at the two opposite ends of a boat of mass 200 kg and length L=20 m. A travels a distance 5 m right relative to the boat towards the centre and B moves a distance 15 m left relative to the boat and meets A. Find the distance travelled by the boat in the water when they meet.
Answer» Two men $(A$ & $B)$ of mass $50 kg$ and $100 kg$ are standing at the two opposite ends of a boat of mass $200 kg$ and length $L = 20 m$ . $A$ travels a distance $5 m$ right relative to the boat towards the centre and $B$ moves a distance $15 m$ left relative to the boat and meets $A$ . Find the distance travelled by the boat in the water when they meet.

Discussion

547.	A positive charge q is carried from a point x to y in an electric field of point charge Q. the work done by the field in SI unit is
Answer» A positive charge q is carried from a point x to y in an electric field of point charge Q. the work done by the field in SI unit is

Discussion

548.	A wire bent as shown in figure carries a current i and is placed in a uniform field of magnetic induction →B that emerges out from the plane of the figure.The magnetic force acting on the wire is:
Answer» A wire bent as shown in figure carries a current $i$ and is placed in a uniform field of magnetic induction $\to B$ that emerges out from the plane of the figure.The magnetic force acting on the wire is:

Discussion

549.	Let f=50 Hz, and C=100 μF in an AC circuit containing a capacitor only. If the peak value of the current in the circuit is 1.57 A at t = 0. The expression for the instantaneous voltage across the capacitor will be
Answer» Let $f = 50 Hz$ , and $C = 100 μ F$ in an AC circuit containing a capacitor only. If the peak value of the current in the circuit is 1.57 A at t = 0. The expression for the instantaneous voltage across the capacitor will be

Discussion

550.	Which of these is a correct distance-time graph for the motion of the body?
Answer» Which of these is a correct distance-time graph for the motion of the body?

550.

Which of these is a correct distance-time graph for the motion of the body?

Answer»

Which of these is a correct distance-time graph for the motion of the body?

Discussion

Explore topic-wise InterviewSolutions in .

The mean radius of the earth is R, its angular speed on its own axis is ω and the acceleration due to gravity at earth's surface is g. The cube of the radius of the orbit of a geostationary satellite will be

In a certain material for which μ=4 the magnetic field is given by,¯¯¯¯¯H=2δx+4δy−8δzA/m The corresponding magnetic energy density is ___ μJ/m2211

Two fixed solid spheres of charges Q and kQ are separated by a distance 6R. A charge -q is to be projected along the line joining their centres, so that it can reach the surface of other solid sphere of charge kQ.ii) if we do not want to give any velocity what should be minimum value of k

Two semi-infinitely long straight current carrying conductors are in form of an L−shape as shown in figure. The common end is at the origin. What is the value of magnetic field at a point (a, b), if both the conductors carrying same current I?

What will be work done in supplying 400 calories of heat to a system?

In case of metal carbonyls, why does the bond order of CO decreases if the number of d electrons increases?

A very long thin charged rod is placed along x-axis with its midpoint at the origin. The charge per unit length of the rod is +lambda, the electric field vector at y = – a on y-axis is

When the object is placed beyond 2F in front of convex lens, the image is formed

9.Is all reversible cycles has same efficiency. And reversible cycles have more efficiency than irreversible one.

A liquid flows in the tube from left to right as shown in figure. A1 and A2 are the area of cross - sections of the portions of the tube as shown. If speed of liquid in these portions be V1 &amp; V2 respectively . The ratio of speeds V1V2 will be

The position of a particle is given by r = 3.0t ˆi − 2.0t 2 ˆj + 4.0 kˆ m where t is in seconds and the coefficients have the proper units for r to be in metres. (a) Find the v and a of the particle? (b) What is the magnitude and direction of velocity of the particle at t = 2.0 s ?

An alternating current is given by i=4cos50t−3sin50t. The rms current is given by

Suggest a suitable physical situation for each of the following graphs (Fig 3.22):

The net capacity between the points A and B in the following circuit will be

An object travels from A with initial velocity of 0 m/s and takes time t1 to move from A to B and time T2 TO MOVE FROM B TO C . If the acceleration remains constant throughout the journey , then find t1:t2

From a disc of radius R and mass M ,a circular hole of diameter R whose rim passes through the centre is cut what is the moment of inertia of the remaining part of the disc about a perpendicular axis passing through the centre?

A string vibrates in 5 segments to a frequency of 480 Hz. The frequency that will cause it to vibrate in 2 segments will be

42.why are dibromides and dichlorides of selenium not stable?

The figure shows a square loop, each side of 10 cm in the xy−plane, with its centre at the origin. An infinite wire is at z=12 cm above y−axis. If the torque on loop due to magnetic force is expressed as x×10−7 N-m, fill the value of x.

6.A point moves rectilinearly. Its displacement xat time t is given byx2 t + 1. Its accelerationat time t is(1)(2)13(3)(t)-

The kinetic energy of one electron is 2.8*10-13j .what is the de broglie wavelength

The unit of length,velocity and force are doubled. which of the following is the correct change in the other units? A) unit of time is doubledB) unit of mass is doubled C) Unit of momentum is doubled D) unit of energy is doubled

For a black body, the absorptive power is -

3 A of current is flowing in a linear conductor having a length of 40 cm. The conductor is placed in a magnetic field of strength 500 gauss and makes an angle of with the direction of the field. It experiences a force of magnitude [MP PET 1993]

Why is the shape of rainbow spherical?

In an LRC circuit, the power factor changes from 12 to 14 then, what is the increase in impedance (the resistance of the resistor in the circuit is constant) ?

An ideal gas has adiabatic exponent γ. If it expands according to law P=α V where α is cons†an t. For this process the bulk modulus of the gas

1. What is the law of conservation of linear momentum? 2. What is the law of conservation of angular momentum?

At a certain section at a distance 'x' from one of the supports of a simply supported beam, the intensity of loading bending moment and shear force are wx,Mx and Vx respectively. If the intensity of loading is varying continuously along the length of the beam then the invalid relation is

A capacitor of capacitance C0 is charged to a potential V0 and then isolated. A small capacitor C is then charged from C0, discharged and charged again; the process being repeated n times. Due to this, potential of the larger capacitor is decreased to V. The value of C is

how to know the direction of induced current in a circular loop

For the case of an ideal gas, find the equation of the process in which the molar heat capacity varies as C=Cv+αT2, where α is constant. Take V0 to be the initial volume of the gas.

If the sum of all forces is zero, what are the magnitudes of the unknown forces x and y?

A 12.5 eV electron beam is used to bombard gaseous hydrogen atroom temperature. What series of wavelengths will be emitted?

In the figure shown, find the force exerted by the pulley at the support. Take g=10 m/s2 and assume that all surfaces are smooth.

how velocity changes with speed and didection or with both?

Assuming potential energy ′U′ at ground level to be zero. All objects are made up of same material. Up= Potential energy of solid sphere UQ= Potential energy of solid cube UR= Potential energy of solid cone US= Potential energy of solid cylinder

8.Two simple harmonic motions are represented by the equations y1=0.1sin(100πt + π/3) and y2=0.1cos100πt. The phase difference of the velocity of particle 1, with respect to the velocity of particle 2 will be?

20. The average force necessary to stop a hammer with momentum p Ns in 0.5 s isan(2) pN(1) 2p NPN(4)(3) 4p NFRAME OFQl2

1.If X is the total no. of collision which a gas molecule register with others per unit time under particular conditions, then the collision frequency of the gas containing N molecule per unit volume is

A positive charge q is carried from a point x to y in an electric field of point charge Q. the work done by the field in SI unit is

A wire bent as shown in figure carries a current i and is placed in a uniform field of magnetic induction →B that emerges out from the plane of the figure.The magnetic force acting on the wire is:

Let f=50 Hz, and C=100 μF in an AC circuit containing a capacitor only. If the peak value of the current in the circuit is 1.57 A at t = 0. The expression for the instantaneous voltage across the capacitor will be

Which of these is a correct distance-time graph for the motion of the body?

A liquid flows in the tube from left to right as shown in figure. A1 and A2 are the area of cross - sections of the portions of the tube as shown. If speed of liquid in these portions be V1 & V2 respectively . The ratio of speeds V1V2 will be