Use BeV=eE
62) An electron beam is subjected to a magnetic field of 2??10?3T and an electric field of 3.4??104Vm?1?perpendicular to magnetic field. If the deviation of electrons is zero, the velocity of the beam is
Answer is:
1.7??107ms?1
Explanation:
Related Dual Nature of Radiation MCQ with Answers
Answer is:
the velocity of electron decreases
Explanation:
Use BeV=eE
Answer is:
Parallel and separate
Explanation:
In Thomson?s method for finding specific charge of positive rays, the electric and magnetic fields are Parallel and separate
Answer is:
their masses are very large
Explanation:
The specific charge for positive rays is much less than that for cathode rays. This is because their masses are very large
Answer is:
4V
Explanation:
Use 1/2mv2max=hv??? and W=hVo