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Syllabus

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

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

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

Q. Write the expression for time period of oscillation of small compass needle in a uniform magnetic field and explain the terms. In this case if the magnitude of the magnetic field is reduced to 1/4th , how does the time period change?

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

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

how to find magnetic field is inward or outward at a point from right hand thumb rule?

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 the unit signifies Tm/A ?

what is cyclotron and how it works?

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

what is the main difference between solenoid and toroid?

The upper end of the thread is suddenly pulled vertically upwards with a constant acceleration ${a}_{0}$. If the bead does not leave the floor, find magnitude of its acceleration immediately after the upper end of the thread is pulled.

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.

what r the limitations of cyclotron?

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

Please give the derivation of Magnetic Field at

1: Axial Position

2: Equatorial Position

Define

dielectric constant of a mediumin terms ofbetweenforceelectric charges.second vessel is expanded adiabatically the sarne extent, then :

(1) In the second vessel, both pressure and work done are more

(2) In the second vessel, pressure in more, but the work done is less.

(3) In the first vessel, both pressure & work done are more.

(4) In the first vessel, pressure is more, but work done is less

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%

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?

1) The capacitor remains connected to the same battery

2) The capacitor is disconnected from the battery

defnation of ampere's circuital law

magnetic field due to 1 cm piece of a wire at a point 2m north east from the piece of wire.

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

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

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......

why No force is exerted by the magnetic field on the arms AD and BC.? inrectangular loop.?

why magnetic field lines form closed curve ??

plzz help !!

a circular coil of wire of radius 5cm having 500 turns carries a current of 1 ampere. calculate the magnetic field

1) at the centre of the coil and

2) ar a point at a distance of 12 cm fron the centre along the X axis of the coil.

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?

Why Biot-Savart Law is only applicable for a symmetrical current distribution?

1) 2v/B

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

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

Calculate the Magnetic field induction at the centre of a coil bent in the form of square of side 10cm carrying current of 10A.

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.

A current of 5 mili amps passing through a coil of 10 turns produce a magnetic field of 6.28*10

^{-8}Tesla at the center 0f the coil calculate the radius of 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

what is the reason why a galvanometer cannot be used as such to measure the current in a given circuit.

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

(1) ACW, In horizontal plane

(2) ACW, In vertical plane

(3) CW, In horizontal plane

(4) CW, In vertical plane

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.

^{7}ms^{-1}enters midway between two horizontal plates in a direction parallel to plates. plates r 5cm long, 2cm apart & have a p.d V applied between them. cal the value of V if beam is deflected so that it jst grazes the edge of lower plate ? e/m=1.8x10^{11}Ckg^{-1}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).

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

an electron accelerated by a potential difference of 300V ,is moving at a distance of 4mm from a long staight wire.If current of 5A flows through the wire,what will be the force acting on the electron?

ans is 4*10^-16N

V

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

is the net force on the loop?

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

field of induction 2x10-2 Wb/m2 . When a current of 5 mA is passed through the coil, it deflects through 60. Find the torsional constant of the suspension fibre.

Sketch the graph showing variation of resistivity of carbon with temperature

why magnetic susceptibility has no unit explain how u have decided bismuth , antimony ,water, n2 are diamgnetic while pt, al , ca etc r para u have to speak the reason of this in phy becaz in che up e concept work in phy which work explain

2- why diamegnetic subs has small negative value of magnetism and susceptibility and low value of relative permeability and vice versa for paramagnetic subs explain the reasons

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

Q33. A liquid of surface tension S is kept in a cylindrical container of radius $\frac{2}{\mathrm{\pi}}$m. Force exerted by liquid on the container is

(1) 2S (2) 4S (3) S (4) 5S

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

1) at a point on d axis of d coil at a distance of 40 cm frm its centre n

2) at d centre of d coil

How to Convert, Galvanometer into a Voltmeter?

18. A posotivley charged particle falling freely under gravity enters a region having a uniform horizontal magnetc field pointing north to south. The paticle will be deflected towards which direction?

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

Diamagnetic ferromagnetic and paramagnetic

Are respectively

Zero zero zero

Zero non zero zero

Zero zero non zero

Zero nonzero non zero

Pls explain this

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

guys help... Two parallel coaxial circular coils of eaul radius 'R' and equal number of turns 'N'. carry equal currents 'I' in the same direction and are separated by a distance '2R'. Find the magnitude of the net magnetic field produced at the mid-point of the line joining the centres.why will it not be 0?the magnetic field due to a current carrying circular loop of radius 3cm at a pt on the axis at a distance of 4cm from the center is 54micro T. what will b its value at center of loop?

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

The electric field inside the dees of a cyclotron is zero. How is a charge particle accelerated?

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 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