Concepts Of Physics MCQ Edition [Volume 2]
- Exam
- Concepts Of Physics MCQ Edition [Volume 2]
- Subject
- Physics
- Chapter
- Electric Current through Gases
Concepts Of Physics MCQ Edition [Volume 2] · Physics · Electric Current through Gases
Cathode rays are travelling through a discharge tube. Inside the...
Cathode rays are travelling through a discharge tube. Inside the tube, there exists
Options
- Aa magnetic field but no electric field
- Bneither an electric nor a magnetic field
- Can electric field as well as a magnetic field
- Dan electric field but no magnetic field
Correct answer
C. an electric field as well as a magnetic field
Step-by-step solution
Cathode rays are produced and accelerated by applying a high potential difference between the cathode and the anode. This applied potential difference establishes an electric field inside the discharge tube.
Cathode rays consist of a stream of moving electrons. Since moving charges constitute an electric current, they produce a magnetic field in the surrounding space inside the tube.
Therefore, both an electric field and a magnetic field exist inside the discharge tube.
Cathode rays consist of a stream of moving electrons. Since moving charges constitute an electric current, they produce a magnetic field in the surrounding space inside the tube.
Therefore, both an electric field and a magnetic field exist inside the discharge tube.