In a cyclotron, a charged particle (A) Undergoes accelaration al the time (B) Speeds up between Dees because `vec(B)` (C) Speed up in a Dee (D) Slows down with in a Dee and speeds up between Dees

If a charged particle of charge to mass ratio (q/m) = alpha centers in a magnetic field of strength B at a speed v=(2 alpha d) (B), then

If the tension in the cable supporting an elevator is equal to the weight of the elevator, the elevator may be - (a) going up with increasing speed ( b) going down with increasing speed ( c) going up with uniform speed ( d) going down with uniform speed

If a particle is accelerating it is either speeding up or speeding down. Do you agree with this statement?

Assertion:- For a particle moving along a straight line, if they velocity and acceleration have same sign, then the particle may be slowing down. Reason:- For a moving particle speeding up and slowing down does not depend upon the angle between velocity and acceleration.

Two identical charged particles enter a uniform magnetic field with same speed but at angles 30^(@) and 60^(@) with field Let a,b and c be the ratio of their time periods, radii and pitches of the helical paths than .

A cyclotron is device for accelerating ions and charged particles. It was developed by Lawerence in 1932. The heart of the appritus consists of a split metal pillbox. Figure sHOws top and front views of the halves called dees. A rapidly oscilating potential difference is applied between the Dees. This produces an oscilating electric field in the gap between the dees, the region inside each dee being essentially free of electric field. The Dees are enclosed in an evaccutaed container, and the entire unit is placed in a uniform magnetic field B whose direction is normal to the plane Of Dees, A charged particle of mass 'm' and charge 'q' in the gap between the dees, it moves with constant speed in a semi-circle. The period of uniform circular motion is T=(2pim)/(qB) and is independant of speed. If the time-period of the oscilating elctric field is equal to this time, then the charged particle will be accelerated again and again In a cyclotron resonance experiment, if we assume that maximum radius attained by any chared particles is equal to radius of dees, then minimum kinetics energy gained by the particles will be

A cyclotron is device for accelerating ions and charged particles. It was developed by Lawerence in 1932. The heart of the appritus consists of a split metal pillbox. Figure sHOws top and front views of the halves called dees. A rapidly oscilating potential difference is applied between the Dees. This produces an oscilating electric field in the gap between the dees, the region inside each dee being essentially free of electric field. The Dees are enclosed in an evaccutaed container, and the entire unit is placed in a uniform magnetic field B whose direction is normal to the plane Of Dees, A charged particle of mass 'm' and charge 'q' in the gap between the dees, it moves with constant speed in a semi-circle. The period of uniform circular motion is T=(2pim)/(qB) and is independant of speed. If the time-period of the oscilating elctric field is equal to this time, then the charged particle will be accelerated again and again Answer the following questions (consider the mass of particles remains constant during motion): A cyclotron is accelerating deutrons having mass= 2xx1.6xx10^(-27) kg and charge +e. If B=2T, then the required angular frequency of oscilating electric field is :

A cyclotron is device for accelerating ions and charged particles. It was developed by Lawerence in 1932. The heart of the appritus consists of a split metal pillbox. Figure sHOws top and front views of the halves called dees. A rapidly oscilating potential difference is applied between the Dees. This produces an oscilating electric field in the gap between the dees, the region inside each dee being essentially free of electric field. The Dees are enclosed in an evaccutaed container, and the entire unit is placed in a uniform magnetic field B whose direction is normal to the plane Of Dees, A charged particle of mass 'm' and charge 'q' in the gap between the dees, it moves with constant speed in a semi-circle. The period of uniform circular motion is T=(2pim)/(qB) and is independant of speed. If the time-period of the oscilating elctric field is equal to this time, then the charged particle will be accelerated again and again Answer the following questions (consider the mass of particles remains constant during motion): A cyclotron has been adjusted to accelereted deutrons. It is now to be adjusted to accelerate other particles , for this following changes may be made: (a) In order to keep the frequency of oscillating electric field same, the magnetic field is halved for proton (b) If the magnetic field remain unchanged, the oscillation frequency of electric field should be halved for alpha particle (c ) If the magnetic field remain unchanged, the oscillation frequency of electric field should be double for proton (d) If the frequency of oscillating electric field is kept same, the magnetic field should be kept same for alpha particle

If a particle is accelerating with acceleration of magnitude a then (a) its speed must vary if a != 0 (b) its speed may remain same even if a != 0 (c) its speed must down if a>0 (d) nothing can be said

(A) : The frequency of charge circulating in cyclotron depend upon the speed of the charge. (R) : The time which charge spends inside a dee of cyclotron is dependent on its velocity and radius of the semicircular path.