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Physics Class 12
Solutions to CBSE Sample Paper - Physics Class 12

Two concentric and coplanar circular loops P and Q have their radii in the ratio 2:3. Loop Q carries a current 9 A in the anticlockwise direction. For the magnetic field to be zero at the common centre, loop P must carry


  1. 3A in clockwise direction
  2. 9A in clockwise direction
  3. 6 A in anti-clockwise direction
  4. 6 A in the clockwise direction.



(iv) 6A in the clockwise direction

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.