Class 12 Physics HC Verma | Chapter 34 Magnetic Field - Exercise Solved (Question 21-37) 2022-23

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✅ In this video,
✔️ Class: 12th
✔️ Subject: Physics (HC Verma)
✔️ Chapter: Magnetic Field (Chapter 34)
✔️ Topic Name: Chapter 34 (HC Verma) Magnetic Field - Exercise Solved (Question 21-37)
✔️ Topics Covered in This Video: Class 12 Physics HC Verma Chapter 34 Magnetic Field - Exercise Solved (Question 21-37)
=======================================================
0:00 00:00 Introduction: Magnetic Field (Chapter 34)
00"30 Exercise: Question - 21 to 30: Magnetic Field (Chapter 34)
21. Figure (34-E7) shows a rod PQ of length 20.0 cm and mass 200 g suspended through a fixed point O by two threads of lengths 20.0 cm each. A magnetic field of strength 0.500 T exists in the vicinity of the wire PQ as shown in the figure. The wires connecting PQ with the battery are loose and exert no force on PQ. (a) Find the tension in the threads when the swit S is open. (b) A current of 2.0 A is established when the is closed. Find the tension in the threads now.
01:45:59 Question - 31 to 37: Magnetic Field (Chapter 34)
31. A proton describes a circle of radius 1 cm in a magnetic field of strength 0.10 T. What would be the radius of the circle described by an -particle moving with the same speed in the same magnetic field?
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