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Syllabus

Explain the principle ,working and construction of moving coil galvanometer.

Explain the working and principle of CYCLOTRON!!!WITH DIAGRAM!!

Q - Write the expression for the force acting on a charged particle of charge

(q)moving with a velocity(v) in the presence of magnetic field(B). show that in presence of this force :(i) the Kinetic Energy of particle does not change.

(ii) Instantaneous power is zero.

what is the proper statement forbiot savart's law?construction and working of moving coil galvanometer

why does a moving charge experience a force in a magnetic field?

why do we need a radial field in moving coil galvanometer??

what is current sensitivity nd voltage sensitivity...define maximum

A CYCLOTRON,S OSCILLATOR FREQUENCY IS 10 MHz. WHAT SHOULD BE THE OPERATING MAGNETIC FIELD FOR ACCELERATING PROTONS? IF THE RADIUS OF ITS DEES IS 60cm, WHAT IS THE KINETIC ENERGY OF THE PROTON BEAM PRODUCED BY THE ACCELERATOR? EXPRESS YOUR ANSWER IN MeV.what is cyclotron and how it works?

Define magnetic inclination and horizontal component os earth's magnetic field at a place.Establish relaation b/w the two with the help of diagram.

What is resonance condition in cyclotron? How is it used to accelerate the charged particles ?

Which one will experience maximum force when projected with the same velocity 'v' perpendicular to the magnetic field B, alpha particle or beta particle?

what is the main difference between solenoid and toroid?

A) 5.75 × 10−5 T B) 6.88 × 10−5 T C) 7.25 × 10−5 T D) 8.08 × 10−5 T

17 (a) an infinitely long positively charged straight wire has a linear charge density of lamda cm(inverse). and electron is revolving around the wire as its centre with a constant velocity in a circular plane perpendicular to the wire. deduce the expression for its kinetic energy.

(b) plot a graph of the kinetic energy as a function of charge density lamda.

A circular coil of 25 turns and radius 6 cm, carrying a current of 10 A, is suspended vertically in a uniform magnetic field of magnitude 1.2 T. The field lines run horizontally in the plane of the coil. Calculate the force and torque on the coil due to the magnetic field.

In which direction, should a balancing torque be applied to prevent the coil from turning?what r the limitations of cyclotron?

a current of 10 A is flowing east to west in a long wire kept horizontally in east west direction. find magnetic field and its direction in the horizontal plane at a distance of

(i)10 cm north

(ii) 20 cm south from the wire.

and in the verical plane at a distance of

(i)40 cm downward

(ii)50 cm upward.

Please give the derivation of Magnetic Field at

1: Axial Position

2: Equatorial Position

What is the unit signifies Tm/A ?

Define

dielectric constant of a mediumin terms ofbetweenforceelectric charges.the horizontal component of earth's magnetic field at a place is 0.4 x 10

^{-4}wb/m^{2}and angle of dip is 30 degrees.caluclate the veritical component and the total intensity of earth's magnetic field- independent magnetic field, is pulled out with constant velocity as shown

in the figure.

a) Sketch the variation of magnetic flux, the induced current, and

power dissipated as Joule heat as function of time.

b) If instead of rectangular loop, circular loop is pulled out; do you

expect the same value of induced current? Justify your answer.

Sketch the variation of flux in this case with time.?

State Ampere's Circuital Law. Use it to derive the magnetic field along the axis of a current carrying solenoid of length 'l' having 'n' number of turns.

a straight long thick wire of uniform cross section of radius 'a' is carrying a steady current I.use ampere's circuital law to obtain a relation showing the variation of magnetic field (B) inside the wire with distance r , (r<=a) and(r>a) of the field point from the center of its cross section .Plot a graph showing the nature of this variation.

Calculate the ratio of the magnetic field at a point a/2 above the surface of the wire to that at a point a/2 below its surface.What is the max value of the field of this wire?

defnation of ampere's circuital law

what is the function of the soft iron core in a moving coil galvanometer

A charged particle, having a charge q is moving with a speed v along the x-axis. It enters a region of space where an electric field E(=Ej) and a magnetic field B are both present. The particle on emerging from this region, is observed to be moving along the x-axis only. Obtain an expression for the magnitude of B in terms of v and E. Give the direction of B.

A weight Mg is suspended from the middle of a rope whose ends are at the same level. The rope is no longer horizontal. The minimum tension required to completely straighten the rope is ????(1) Mg/2 ......(2) Mgcos (theta).......(3) 2Mgcos ( theta) ....(4) Infinitely large......

A proton moving in a straight line enters a strong magnetic field along the field line direction. How will its path and velocity change?

why magnetic field lines form closed curve ??

41.If a charge particle is projected at angle $\theta $ with direction of parallel electric and magnetic field as shown in figure then path of particle will be (1) Circular(2) Helical with constant pitch

(3) Helical with increasing pitch

(4) Helical with decreasing pitch

If the current sensitivity of a moving coil galvanometer is increased by 20%, its resistance also increases by 1.5 times.How will the voltage sensitivity of galvanometer be affected?

1) 2v/B

^{2}R^{2}2)v/2BR

pl show the method.[the ans- (1)]

A coil of wire has an area of 600 sq. cm and has 500 turns. If it carries 1.5 A current, its magnetic dipole moment is:-

A coil of N turns and radius R carries a current I. It is unwound and rewound to make another

coil of radius R/2, current remaining the same. Calculate the ratio of the magnetic moment of the

new coil and original coil.

Two point charges, q1 and q2, are located at points (a, o, o) and (o, b, o)

respectively. Find the electric field, due to both these charges, at the point,

(o, o, c).

magnetic field lines can be entirely confined within the core of a toroid but not within a straight solenoid. Why?

Please explain me first the meaning of the question and then the answer

1. 0.1V/M 2. 1.0V/M 3. 10.0 V/M 4. 100 V/M

state amperes circuital law??????????????

Two identical circular loops, P and Q, each of radius r and carrying currents I and 2I respectively are lying in parallel plans such that they have a common axis.

The direction of current in both the loops is clockwise as seen from center . Find the magnitude of the net magnetic field at the center.

what is the relation between between the current and the magnetic moment of a current carrying circular loop ? use this expression derive the relation between the magnetic moment of an electron moving in a circle and its related angular momentum?

placed with its longer side parallel to a long straight conductor 2cm apart carrying of 25A. What

is the net force on the loop?

11. A conductor when thermally heated possess large number offreely moving electron,even then no magnetic field is

An electron after being accelerated through a potential difference of 10

^{4}_{ }Volt enters a uniform magnetic field of 0.04T perpendicular to its direction of motion.Calculate the radius of curvature of its trejectory?A long wire is bent into a circular coil of one turn and then into a circular coil of smaller radius having 'n' turns. If the same current passes in both the cases, find the ratio of the magnetic field produced at the centres in the two cases

what are the application and limitation of ampere's circuital law

Sketch the graph showing variation of resistivity of carbon with temperature

what is the SI unit of current sensitivity in moving coil galvanometer?

Answer is pi R^2 B0 / root 2 (i cap - j cap)

A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that B vector is in plane of the coil. if due to a current i in the triangle a torque torque acts on it, the side l of the triangle is

How to Convert, Galvanometer into a Voltmeter?

What is pitch of the helical path followed by a charged particle moving along and making an angle θ with the magnetc field ?

velocity v towards East. The vertical component of

earth magnetic field is B and angle of dip is θ. The

induced e.m.f. in rod is

(1) Blv cot θ (2) Blv sin θ

(3) Blv tan θ (4) Blv cos θ

A magnetic dipole of dipole moment 10 $\left(\hat{i}+\hat{j}+\hat{k}\right)$ is placed in a magnetic field $0.6\hat{i}+0.4\hat{j}+0.5\hat{k}$, force

Q.44. If diffraction occurs through a single slit then intensity of first secondary maxima become ............... of central maxima :-

(1) 4%

(2) 25%

(3) 75%

(d) 50%

A beam of alpha particles projected along +x axis, experience a force due to magnitic field along the +y axis. What is the direction of the magnetic field?

how to find refractive index of aliquid using plane mirror and convex lens

what is the radius of the path of an electron (mass=9 x 10

^{-31}KG and charge 1.6 x 10^{-19}C ) moving at a speed of 3 x 10^{7}m/s in a magnetic field of 6 x 10^{-4}T perpendicular to it ?? what is its frequency ?? calculate its energy in KeV. ( 1 eV = 1.6 x 10^{-19}J ) .State two factors on which sensitivity of a moving coil galvanometer depends?

an alpha particle and a proton are released from the centre of the cyclotron and made to accelerate 1. can both be accelerated at the same cyclotron frequency give reason 2.when they are accelerated in turn which of the two will have higher velocity at the exit of the dees.

A set of 4 cells each of emf 2V and internal resistance 1.5 ohm are connected across external load of 10 ohm with two raw cells in each branch. Calculate the current in each branch and potential difference across 10 ohm.