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Syllabus

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

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.

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

what is the proper statement forbiot savart's law?a long solenoid with closely wound turn has n turns per unit of its length.a steady current/flow through this solenoid.use ampere circuital law to obtain an expression for the magnetic field at point on its axis and closed to its midpoint.

construction and working of moving coil galvanometer

^{o}C and sink 27^{o}C is nearly(1) 0.1 (2) 0.2 (3) 0.3 (4) 0.4

17. A carnot engine working between 300 K and 600 K has work output of 800 J per cycle . What is amount of heat energy supplied to the engine from source per cycle

(1) 1800 J/cycle (2) 1000 J/cycle (3) 2000 J/Cycle (4) 1600 J/cycle

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

The magnitude of velocities at point A, B and C respectively during the motion is :

(1) Maximum at A and C

(2) Maximum at B

(3) Minimum at A and C

(4) Equal at A, B and C

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.$\left(a\right)\frac{{\mu}_{0}I}{\sqrt{2}\mathrm{\pi a}}\phantom{\rule{0ex}{0ex}}\left(\mathrm{b}\right)2\sqrt{2}\frac{{\mathrm{\mu}}_{0}\mathrm{I}}{\mathrm{\pi a}}\phantom{\rule{0ex}{0ex}}\left(\mathrm{c}\right)\frac{2{\mathrm{\mu}}_{0}\mathrm{I}}{\mathrm{\pi a}}\phantom{\rule{0ex}{0ex}}\left(\mathrm{d}\right)\mathrm{zero}$

what is cyclotron and how it works?

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

An electron of 40 eV energy is revolving in a circular path in a magnetic field of 9*10^-5T.Determine (i)speed of the electron (ii)radius of the circular path .

ans is (i03.75*10^6m s^-1,(ii)23.7cm

what is the main difference between solenoid and toroid?

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.

Q.14. Rods AB, BC, CD & DA for a square loop having current i, mass and length of each rod is m and l respectivety, issituated in a uniform magnetic field B as shown in the figure andit can rotate about axis ${P}_{1}{P}_{2}$, Then, find the angular acceleration of the square loop at t = 0 in $rad/se{c}^{2}$.

(where B = 10 Tesla, i = 2 amp, m = 5 kg).

what r the limitations of cyclotron?

No links please

Please give the derivation of Magnetic Field at

1: Axial Position

2: Equatorial Position

Define

dielectric constant of a mediumin terms ofbetweenforceelectric charges.(1) a proton

(2) an alpha particle

(3) an electron

(4) a neutron

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.

4. Five parallel infinite wires are placed at vertices of a regular pentagon. Four wires carry current I

_{0}each while the fifth wire carries current 3I0 shown. The resultant magnetic field at the centre O is :$\left(\mathrm{A}\right)\mathrm{Zero}\left(\mathrm{B}\right)\frac{{\mathrm{\mu}}_{0}{\mathrm{I}}_{0}}{2\mathrm{\pi a}}\left(\mathrm{C}\right)\frac{{\mathrm{\mu}}_{0}{\mathrm{I}}_{0}}{\mathrm{\pi a}}\left(\mathrm{D}\right)\mathrm{Infinite}$

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?

Bat the centre of the are. (a) What is the magnetic field due to the straight segments? (b) In what way the contribution toBfrom the semicircle differs from that of a circular loop and in what way does it resemble? (c) Would your answer be different if the wire were bent into a semi-circular arc of the same radius but in the opposite way as shown in Fig. 4.13(b)?defnation of ampere's circuital law

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

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......

hence define Bohr magneton.

why magnetic field lines form closed curve ??

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 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.

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

_{0}/ 4pi?1. 0.1V/M 2. 1.0V/M 3. 10.0 V/M 4. 100 V/M

find the torque on 100 turns rectangular coil of

size 40cm*20cm,carrying a current of 10A and placed at an angle of 60 degree with the magnetic field of 5.0T.

answer is 200N

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.

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

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).

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(A) $\sqrt[3]{2}$

(B) $\frac{1}{\sqrt[3]{2}}$

(C) $2\sqrt{2}$

(D) $\sqrt[3/2]{2}$

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

is the net force on the loop?

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.

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?Find x & y component of velocity of particle at time t & tell the particle and is radius

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?

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 ?

Solve this :47. A cyclotron accelerating protons has dees of 0.4 m radius and a radio-frequency supply of megacycles/seconds at 5000 volt maximum value. Calculate the magnitude of the required magnetic field, the energy and velocity acquired by the protons. Take protons mass 1.67 * 10

^{-27}kg.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 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?

Solve this:The coil of a galvanometer is 0.02 m * 0.08 m. It consists of 200 turns of fine wire and is in a magnetic field of 0.2 tesla. The restoring torque constant of the suspension fibre is 10

^{-6}Nm deg^{-1}. Assuming the magnetic field to be radial, (a) what is the maximum current that can be measured by this galvanometer, if the scale can accommodate 30^{o}deflection ? (b) what is the smallest current that can be detected, if the minimum observable deflection is 0.1 degree ?how to find refractive index of aliquid using plane mirror and convex lens

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:-

State two factors on which sensitivity of a moving coil galvanometer depends?

What torque acts on a 40 turn coil of 100 cm

^{2}area carrying a current of 10 A held with its axis at right angles to magnetic field of flux density 0.2 T and plane of the coil parallel to the field ???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.