question_answer

Mr. Ramcharan Jain, a 68 years old man, complained of neck pain. One day his grandson Kabir suggested that magnetic therapy is very effective in reducing such pain. Mr. Ramcharan contacted with concern medical clinic. After that, he get that therapy and felt better.

(i) What values did Kabir exhibit towards his grandfather?

(ii) Where is the magnetic field due to a current element be minimum?

Answer:

(i) Responsible behavior and concern for his grandfather?s health.

(ii) According to Biot-Savart law,

 \[dB=\frac{\mu }{4\pi }\frac{Idl}{{{r}^{2}}}\sin \theta \] Magnetic field will be zero (minimum) along the axis of a current element \[(\because \,\,\theta =0)\]