15. Two perpendicular wires each carry current / in the directions as shown. Whi

Question

15. Two perpendicular wires each carry current / in the directions as shown. Which of the following is a true statement? A) The two wires are attracted to each other. B) The two wires are unaffected by each other. C) The magnetic fields generated by the currents cancel everywhere surrounding the two wires. D) The two wires repel each other. E) The net magnetic field due to the two wires is uniform everywhere A conducting loop is formed by running a wire completely around the edge of this page. A uniform magnetic field directed out of the page is decreasing at the rate of 4.0 T/s. What is the direction of the 16. current induced in the loop? A) The induced current will move counterclockwise around the edge of the page. B) The induced current will alternate between clockwise and counterclockwise. C The induced current will move clockwise around the edge of the page. D) No current will be induced because the loop and field do not have the right orientation.

Explanation / Answer

15)

OPTION (B)

The two wires ar unaffected by each other

the magnetic field produced by first wire at the location of second

wire is parallel to the current in second wire

force on second wire F = B*I2*L2*sintheta

B and L are parallel

F = 0

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16)

the magnetic flux is decreasing

the magnetic field due to induced current is out of page

the induced current is counterclock wise around the edge of the page

OPTION ( C )

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