Cathode rays enter into a uniform magnetic field perpendicular to the direction of the field. In the magnetic field their path will be
Cathode rays enter into a uniform magnetic field perpendicular to the direction of the field. In the magnetic field their path will be
- A
Straight line
- B
Circle
- C
Parabolic
- D
Ellipse
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Cathode rays consist of
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What is specific charge ? Write its standard value.
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Which one of the following devices makes use of the electrons to strike certain substances to produce fluorescence
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In a Thomson set-up for the determination of e/m, electrons accelerated by $2.5$ $kV$ enter the region of crossed electric and magnetic fields of strengths $3.6 \times {10^4}V{m^{ - 1}}$ and $1.2 \times {10^{ - 3}}T$ respectively and go through undeflected. The measured value of $e/m$ of the electron is equal to
In a Thomson set-up for the determination of e/m, electrons accelerated by $2.5$ $kV$ enter the region of crossed electric and magnetic fields of strengths $3.6 \times {10^4}V{m^{ - 1}}$ and $1.2 \times {10^{ - 3}}T$ respectively and go through undeflected. The measured value of $e/m$ of the electron is equal to