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In an experiment to measure the charge to mass ratio e / m of the electron by Thomson's method, the values of the deflecting electric field and the accelerating potential are 6 × 106 N/C (newton per coulomb) and 150 V, respectively. The magnitude of the magnetic field that leads to zero deflection of the electron beam is closest to
  • a)
    0.6 T
  • b)
    1.2 T
  • c)
    0.4 T
  • d)
    0.8 T
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
In an experiment to measure the charge to mass ratio e / m of the elec...
CONCEPT:
The kinetic energy is written as;

and K.E =eV
Therefore,

CALCULATION:
Given: Electric field,E=6×106N/C
Vo=150V
As we know;
F=e(v×B)
Here v and B are perpendicular to each other, therefore,
F=e(vBsin(90o))
⇒ F=e(vB)
and Force, F = eE
eE=e(vB)
⇒ E = vB

The kinetic energy is written as;

Now, putting equation 2) into 1) we have;

⇒ B = 0.8 T
Hence, option D) is the correct answer.
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In an experiment to measure the charge to mass ratio e / m of the elec...
In Thomson's method, the charge to mass ratio (e/m) of the electron can be determined by measuring the deflection of electrons in an electric field and an accelerating potential. However, you have not provided the values of the deflecting electric field and the accelerating potential. Please provide the values so that we can proceed with the calculation.
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In an experiment to measure the charge to mass ratio e / m of the electron by Thomsons method, the values of the deflecting electric field and the accelerating potential are 6× 106N/C (newton per coulomb) and 150 V, respectively. The magnitude of the magnetic field that leads to zero deflection of the electron beam is closest toa)0.6 Tb)1.2 Tc)0.4 Td)0.8 TCorrect answer is option 'D'. Can you explain this answer?
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In an experiment to measure the charge to mass ratio e / m of the electron by Thomsons method, the values of the deflecting electric field and the accelerating potential are 6× 106N/C (newton per coulomb) and 150 V, respectively. The magnitude of the magnetic field that leads to zero deflection of the electron beam is closest toa)0.6 Tb)1.2 Tc)0.4 Td)0.8 TCorrect answer is option 'D'. Can you explain this answer? for UGC NET 2024 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about In an experiment to measure the charge to mass ratio e / m of the electron by Thomsons method, the values of the deflecting electric field and the accelerating potential are 6× 106N/C (newton per coulomb) and 150 V, respectively. The magnitude of the magnetic field that leads to zero deflection of the electron beam is closest toa)0.6 Tb)1.2 Tc)0.4 Td)0.8 TCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for UGC NET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In an experiment to measure the charge to mass ratio e / m of the electron by Thomsons method, the values of the deflecting electric field and the accelerating potential are 6× 106N/C (newton per coulomb) and 150 V, respectively. The magnitude of the magnetic field that leads to zero deflection of the electron beam is closest toa)0.6 Tb)1.2 Tc)0.4 Td)0.8 TCorrect answer is option 'D'. Can you explain this answer?.
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