Chapter 28.5, Problem 28.5TYU

(a)

To determine

The components of $\overrightarrow{dB}$ at point P due to current element $dl$ at the negative y axis.

(i) $d{B}_x>0,d{B}_y>0,d{B}_z=0$

(ii) $d{B}_x>0,d{B}_y<0,d{B}_z=0$

(iii) $d{B}_x<0,d{B}_y>0,d{B}_z=0$

(iv) $d{B}_x<0,d{B}_y<0,d{B}_z=0$

(v) none of these

(b)

To determine

The components of $\overrightarrow{dB}$ at point P due to current element $dl$ at the negative z axis.

(i) $d{B}_x>0,d{B}_y>0,d{B}_z=0$

(ii) $d{B}_x>0,d{B}_y<0,d{B}_z=0$

(iii) $d{B}_x<0,d{B}_y>0,d{B}_z=0$

(iv) $d{B}_x<0,d{B}_y<0,d{B}_z=0$

(v) none of these