Question

An infinitely long conductor PQR is bent to form a right angle as shown. A current I flows through PQR The magnetic field due to this current at the point M is H₁. Now another infinitely long straight conductor QS is connected at Q so that the current is I/2 in QR as well as in QS, The current in PQ remaining unchanged. The magnetic field at M is now H₂.The ratio H₁/H₂ is given by

A) 12  

B)  1  

C)  23  

D)  2

Comments

please type compleat question.

Answer 1

Correct Answer: C  

Explanation : Magnetic field at any point lying on the current carrying straight conductor is zero. 

Here H1 = Magnetic field at M due to current in PQ.         

H2 = Magnetic field at M due to QR + magnetic field at M due to QS + magnetic field at M due to PQ =0+H₁/2+H₁= 3/2 H₁ 

H₁/H₂ = 2/3