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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

A uniform magnetic field of 5000 gauss is established along the positive z-direction.A rectangular loop of side 20cm and 5cm carries a current of 10A is suspended in this magnetic field.What is the torque on the loop in the different cases shown in the following figures? What is the force in each case? Which case corresponds to stable equilibrium?

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

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

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 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?

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

what is the main difference between solenoid and toroid?

One mole of an ideal monoatomic gas undergoes a process

ABCas shown in the indicator diagram. Heat supplied to the gas during the process isans is 7pv..how solve ?

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?

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

Please give the derivation of Magnetic Field at

1: Axial Position

2: Equatorial Position

Define

dielectric constant of a mediumin terms ofbetweenforceelectric charges.an alpha particle is moving along a circle of radius 0.45m in a magnetic field of 12T.Find (i)the speed of the paticle ,(ii)the time period of the particle.(mass of alpha particle is 6.7*10^-27kg).

ans is (i)2.58*10^8m per secs,(ii)1.09*10^-8s

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.

What is the unit signifies Tm/A ?

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 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 magnetic field lines form closed curve ??

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

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)]

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

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

Band_{P}Bbe the magnetic field produced by the wire P and Q which are placed symmetrically in a rectangular loop ABCD as shown in figure. Current in wire_{Q}Pis I directed inward and inQis 21 directed outwards. If $\underset{A}{\overset{B}{\int}}{\overrightarrow{B}}_{Q}\xb7\overrightarrow{d\mathcal{l}}=2{\mu}_{0}$ tesla meter, $\underset{D}{\overset{A}{\int}}{\overrightarrow{B}}_{P}\xb7\overrightarrow{d\mathcal{l}}=-2{\mu}_{0}$ tesla meter & $\underset{A}{\overset{B}{\int}}{\overrightarrow{B}}_{P}\xb7\overrightarrow{d\mathcal{l}}=-{\mu}_{0}$ tesla meter the value of I will be:(A) 8 A (B) 4 A (C) 5 A (D) 6 A

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

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

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

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

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.

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).

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.

Q26. Work done by thermodynamic system during process AB as shown in the figure, is

(1) P

_{0}V_{0}(2) 2P_{0}V_{0}_{ }(3) 3P_{0}V_{0}_{ }(4) ZeroA proton is moving along the negative direction of x-axis in a magnetic field directed along the positive direction of y-axis. The proton will be deflected along the negative direction of?

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?Pls and fast

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

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

Q23. A proton moving towards east in a horizontal plane enters a horizontal magnetic field of 0.34 T directed towards north with speed of 2.0 × 10

^{7}ms^{–1}. Calculate (i) the magnitude and direction of the force on the proton, (ii) radius of proton's path and (iii) the lateral displacement of the proton while moving 0.20 m towards east.Ans. (i) 1.09 × 10

^{–12}N, vertically upwards,(ii) 0.625 m, (iii) 0.032 m (approx).

Sketch the graph showing variation of resistivity of carbon with temperature

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

3. A uniform magnetic field $\mathrm{B}=\left(3\hat{\mathrm{i}}+4\hat{\mathrm{j}}+\hat{\mathrm{k}}\right)$ exists in region of space. A semicircular wire of radius 1 m carrying current 1 A having its centre at (2. 2, 0) placed in x-y plane as shown in fig. The force on semicircular wire will be.

$\left(\mathrm{A}\right)\sqrt{2}\left(\hat{\mathrm{i}}+\hat{\mathrm{j}}+\hat{\mathrm{k}}\right)\left(\mathrm{B}\right)\sqrt{2}\left(\hat{\mathrm{i}}-\hat{\mathrm{j}}+\hat{\mathrm{k}}\right)\phantom{\rule{0ex}{0ex}}\left(\mathrm{C}\right)\sqrt{2}\left(\hat{\mathrm{i}}+\hat{\mathrm{j}}-\mathrm{k}\right)\left(\mathrm{D}\right)\sqrt{2}\left(\hat{-\mathrm{i}}+\hat{\mathrm{j}}+\hat{\mathrm{k}}\right)$

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?

b) What is the significance of using (i) radial magnetic field (ii) a cylindrical soft iron core inside the coil of galvanometer.

c) "Increasing the current sensitivity of a galvanometer may not necessarily increase its voltage sensitivity". Justify this statement.

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

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.

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

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

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?

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

If we unwound and rewound a coil will number of turns remain same??

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.