📅 NSB Round Robin 2020🎓 HS🔄 Round 17#️⃣ Question 1❓ TOSS-UP✍️ Short Answer
Andrew measures the strength of a magnetic field, B, caused by a current- carrying wire at a distance R from the wire. If he measures it again from 3R, B would be multiplied by what number?
✔️Answer:1/3
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