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Physics CBSE Live product
Class 10 (2025-26)
Magnetic effects of electric current
Annual Revision II - Magnetic effects of current
4.
Strength of magnetic field and direction of force
Question:
2
m.
Select the best answer:
The strength of the magnetic field at a point distance 10 cm from a long straight current carrying wire is B. The field at a distance 5 cm will be
\(\frac{B}{4}\)
\(\frac{B}{2}\)
\(2B\)
\(4B\)
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