⇦ | ![]() | ⇨ |
In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential V and then made to describe semicircular path of radius R using a magnetic field B. If V and B are kept constant, the ratio ( charge on the ion / mass of the ion) will be proportional to
Options
(a) 1/R²
(b) R²
(c) R
(d) 1/R
Correct Answer:
1/R²
Explanation:
In mass spectrometer, when ions are accelerated through potential V
1/2 mv² = qV …..(i)
As the magnetic field curves the path of the ions in a semiciruclar orbit
Bqv = mv² / R v = BqR / m ….(ii)
Substituting (ii) and (i)
1/2 m[ BqR / m]² = qv or q/m = 2V / B²R²
Since V and B are constants, q/m ∞ 1/R²
Related Questions: - An electron is moving in a circular path under the influence of a transverse magnetic
- The power supplied by a force acting on a particle moving in a straight line
- A p-n photodiode is made of a material with a band gap of 2.0 eV
- To demonstrate the phenomenon of interference, we require two sources which emit
- Two charges each equal to 2µ C are 0.5m apart. If both of them exist inside vacuum
Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An electron is moving in a circular path under the influence of a transverse magnetic
- The power supplied by a force acting on a particle moving in a straight line
- A p-n photodiode is made of a material with a band gap of 2.0 eV
- To demonstrate the phenomenon of interference, we require two sources which emit
- Two charges each equal to 2µ C are 0.5m apart. If both of them exist inside vacuum
Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply