A beam of electrons at rest is accelerated by a potential V . This beam experiences a force F in a uniform magnetic field. The accelerating field is increased to V ' and the force experienced by the electrons in the same field is ' 2 F ' .

Question

A beam of electrons at rest is accelerated by a potential V . This beam experiences a force F in a uniform magnetic field. The accelerating field is increased to V ' and the force experienced by the electrons in the same field is ' 2 F ' . The ratio is V V^

Quantrex Academy · Accepted Answer

Correct answer: C. 1: 4

aligned & K.E. 1 2 m v^2=e V & v= 2 e V m & F=e V B=e 2 e V m B & Given F^ =2 F=2 e 2 e V m B & 1 2 e 2 e V^ m B=e 2 e V m B & V^ =4 V aligned

A beam of electrons at rest is accelerated by a potential V . This beam experiences a force F in a uniform magnetic field. The accelerating field is increased to V ' and the force experienced by the electrons in the same field is ' 2 F ' . The ratio is V V^

Options

Correct answer

Step-by-step solution

More from Magnetic Effects of Current