The maximum kinetic energy of the positive ion of charge q and mass m in the cyclotron of radius \(r_o\) in which applied magnetic field is B, is:
1.
2.
3.
4.
Cyclotron cannot be used to accelerate
(1) Electrons
(2) Neutrons
(3) Positive ions
(4) Both (1) and (2)
A charge is moving in a circular path of radius 'r' with speed v in a transverse magnetic field B. Specific charge of the particle is
1.
2.
3. Bvr
4.
An completes 40,000 revolutions in a cyclotron before exiting from it. If potential difference between the Dees is 5000 V, then the energy gained by the particle is
1. 8 MeV
2. 800 MeV
3. 4 MeV
4. 400 MeV
To compensate the relativistic variation of mass at high speed of charge in cyclotron. Adjustments can be made is :
1. Frequency of a.c is decreased
2. Magnetic field is increased
3. Peak value of a.c is increased
4. Both (1) & (2)
A cyclotron cannot be used to accelerate
1. Deutrons
2. Protons
3. Neutrons
4. Both (1) & (3)
Cyclotron frequency does not depend upon
1. Specific charge
2. Speed of revolving particle
3. Magnetic induction
4. Charge
The maximum kinetic energy of an coming out of a cyclotron accelerator is 20 MeV. The maximum kinetic energy of a proton that can be obtained from this accelerator is
1. 20 MeV
2. 40 MeV
3. 10 MeV
4. 5 MeV
A monoenergetic electron beam with an electron speed of 5.20 x 106 m/s is subject to a magnetic field of 1.30 x 10-4 T normal to the beam velocity. What is the radius of the circle traced by the beam, given e/m for electron equals 1.76 x 1011 C kg-1?
1. 22.7 cm
2. 21.3 cm
3. 20.0 cm
4. 21.9 cm
An electron gun with its collector at a potential of 100 V fires out electrons in a spherical bulb containing hydrogen gas at low pressure A magnetic field of curves the path of the electrons in a circular orbit of radius 12.0 cm. (The path can be viewed because the gas ions in the path focus the beam by attracting electrons, and emitting light by electron capture; this method is known as the 'fine beam tube' method. Specific charge ratio (e/m) is:
1. \(1.21 \times 10^{11} \mathrm{C}~ \mathrm{kg}^{-1}\)
2. \(1.73 \times 10^{11} \mathrm{C}~\mathrm{kg}^{-1}\)
3. \(2.53 \times 10^{11} \mathrm{C}~\mathrm{kg}^{-1}\)
4. \(3.02 \times 10^{11} \mathrm{C}~\mathrm{kg}^{-1}\)