A) Greater than at Q
B) Same as at Q
C) less than at Q
D) Greater or less than at Q depending upon the strength of the current
Correct Answer: A
Solution :
\[{{B}_{W}}=B\] due to wire |
\[{{B}_{E}}=\]Magnetic field due to earth |
\[{{B}_{Net\,\,Q}}={{B}_{W}}-{{B}_{E}}\] |
\[{{B}_{Net\,\,P}}={{B}_{W}}+{{B}_{E}}\] |
\[\therefore \,\,\,\,{{B}_{Net\,\,P}}>{{B}_{Net\,\,Q}}\] |
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