KCET · Physics · Electrostatics
A point charge is placed in a moving train. A passenger A sitting in the train and person B on the ground observe the fields due to this charge. Then
- A A observes both electric and magnetic fields
- B B observes both electric and magnetic fields
- C A observes only magnetic field
- D B observes only electric field
Answer & Solution
Correct Answer
(B) B observes both electric and magnetic fields
Step-by-step Solution
Detailed explanation
For observer A sitting in the train, the point charge is at rest. A stationary charge produces only an electric field. Thus, A observes only an electric field.
For observer B standing on the ground, the point charge is moving with the velocity of the train. A moving charge produces both an electric field and a magnetic field. Thus, B observes both electric and magnetic fields.
Answer: B observes both electric and magnetic fields
For observer B standing on the ground, the point charge is moving with the velocity of the train. A moving charge produces both an electric field and a magnetic field. Thus, B observes both electric and magnetic fields.
Answer: B observes both electric and magnetic fields
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