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Syllabus

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

wire. The ratio of electric field on the spheres is

(1) 3 : 2

(2) 2 : 3

(3) 9 : 4

(4) 4 : 9

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

(1) $\frac{3}{4}$ C

(2) $\frac{9}{16}$C

(3) $\frac{4}{9}$ C

(4) $\frac{9}{4}$ C

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

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.^{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 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?

What is the unit signifies Tm/A ?

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

what r the limitations of cyclotron?

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 fieldPlease give the derivation of Magnetic Field at

1: Axial Position

2: Equatorial Position

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) ZeroDefine

dielectric constant of a mediumin terms ofbetweenforceelectric charges.202. A thin bar magnet when suspended freely has a time

period of 2 second. It is cut into two equal

parts along the perpendicular bisector. The two

parts are placed one over the other such that their

dipole moments are pointing in the same direction.

Now if this assembly is suspended freely its time-period will be

(1) 1 s (2) 2 s

(3) 4 s (4) 8 s

A SHORT CONDUCTOR OF LENGTH 5 cm IS PLACED PARALLEL TO A LONG CONDUCTOR OF LENGTH 1.5m NEAR ITS CENTRE.THE CONDUCTOR CARRY CURRENT 4.0A AND 5.0A RESPECTIVELY IN SAME DIRECTION .WHAT IS TOTAL FORCE EXPERIENCED BY LONG CONDUCTOR WHEN THEY ARE 3.0 cm APART ?

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.

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

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?

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:-

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......

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)]

2. Two particles of masses 2 kg and 4 kg are thrown from the top of a tower such that first is vertically upward and second is at angle 45

^{o}above horizontal. Acceleration of the centre of mass of two particle system is.$\left(1\right)g\left(2\right)\frac{g}{6}\left(3\right)\frac{2g}{3}\left(4\right)\frac{g}{3}$

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

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

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

Q.24. A solenoid of length 20 cm and radius 2 cm is closely wound with 200 turns. The magnetic field intensity at either end of the solenoid when the current in the winding is 5 amp. is

1 ) 2500 Amp/m

2) 2000 Amp/m

3) 1750 Amp/m

4) 2940 Amp/m

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

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%

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.

5.The magnetic field at the centre of circular loop in the circuit shown below isTwo 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).

32. A cyclotron in which protons are accelerated has a flux density of 1.57T. The variation of frequency of electric field is ( in Hz)

1) 4.8 x 10

^{8}2) 8.4 x 10^{8}(3) 2.5 x 10

^{7}4) 4.8 x 10^{6}33. Cyclotron is adjusted to give proton beam, magnetic induction is 0.15 wbm

^{-2}and the extreme radius is 1.5 m. The energy of emergent proton in MeV will be.1) 34.2 2) 3.42 3) 2.43 4) 24.3

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

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

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

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.

Sketch the graph showing variation of resistivity of carbon with temperature

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

38.A proton moving with a velocity of (6i + 8j) $\times $ 10^{5}ms^{$-$1}enters uniform magnetic field of induction 5 $\times $ 10^{$-$3}$\hat{k}$ tesla. The magnitude of the force acting on the proton is (i, j and k are unit vectors along X, Y, Z directions respectively)1) zero 2) 8 $\times $ 10

^{$-$16}N 3) 3 $\times $ 10^{$-$16}N 4) 4 $\times $ 10^{$-$16}NA 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) in an iron box

(2) in wooden box

(3) in plastic box

(4) none of these

How to Convert, Galvanometer into a Voltmeter?

work done to move a charge along a closed path inside an electric path inside an electric field is always zero using this fact prove that it is impossible to produce an electric field in which all field lines would be parallel and density of their distirbution would constantly increase in a direction perpendicular to the field line

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

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

And how is electric field present only in between the dees to accelerate the charged particle ?

Please Explain

Thanks In Advance

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

^{-5}N, when kept at a separation of 20 cm in air. Calculate the pole strengths of the two poles.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

Q=A particle having charge q=1C and mass m=1kg is released from rest at origin .There is an electric fieldE=(10 i^)N/C for 1.8 m and magentic fieldB=(-5 k^)T for 1.8 m(a)=Find the time spent by the particle in the magnetic field region (in sec)

.ans=(pie)/30 secState two factors on which sensitivity of a moving coil galvanometer depends?

please explain right hand palm rule?///

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.