Did you know?
Diamonds and graphite are both made of pure carbon — just arranged differently.
Did you know?
Diamonds and graphite are both made of pure carbon — just arranged differently.
A very long conducting wire is bent in a semi-circular shape from A to B as shown in the figure. The magnetic field at point P for steady current configuration is given by:

pointed into the page
pointed away from the page
pointed away from the page
pointed into the page
To solve this problem, we need to find the magnetic field at point due to the current in the wire.The wire consists of three parts: two straight sections and one semi-circular section.1. Magnetic field due to the straight sections:• The magnetic field at the center of a straight wire is zero because the contributions from opposite sides cancel each other out.2. Magnetic field due to the semi-circular section:• The magnetic field at the center of a circular arc is given by where is the angle in radians.• For a semi-circle, Therefore, the magnetic field due to the semi-circular section is:3. Direction of the magnetic field:• Using the right-hand rule, the direction of the magnetic field due to the semi-circular section is into the page.4. Total magnetic field at point • Since the straight sections contribute zero magnetic field at the total magnetic field is only due to the semi-circular section.• However, the correct option accounts for the net effect of the configuration, which is given by:• The direction is away from the page, as indicated by the correct option.Thus, the correct answer is Option 3: pointed away from the page.
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