NCERT Class XII Chapter <br>Moving Charges and Magnetism <br> Questions With Solutions

NCERT Class XII Chapter
Moving Charges and Magnetism
Questions With Solutions

Question : 2

Total: 28

A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 cm from the wire?

Solution:

Magnetic field due to a long straight wire
B =

µ0

4π

or B = 10−7×

2×35

20×10−2

= 3.5 × 10−5 T

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