The diagram above depicts a wire composed of 3 Segments that are connected. The

Question

The diagram above depicts a wire composed of 3 Segments that are connected. The wire is carrying a current of i. Consider the situation as shown and the following statements. If the statement is true, answer 'T', if it is false, answer 'F', and if the answer cannot be determined from the information provided, answer 'C'.

Part a)

A)The magnetic field at P due to Segment 1 of the wire does not equal zero.
B)If the direction of the current were reversed, the direction of the magnetic field at P would be out of page.
C)If the magnitude of the current were doubled, the magnitude of the magnetic field at P would quadruple.
D)The magnetic field at P due to Segment 3 of the wire does not equal zero.
E)The direction of the magnetic field at P is downwards.

Part b)

If a = 16.5 cm, = 19.5°, and i = 3.70 A, what is the magnitude of the magnetic field at point P due to this wire?

Explanation / Answer

Part a
a) F
b) T
c) F
d) F
e) F... it is inside the page.

the explanations to these questions are cotained in part B.
Part b
Magnetic field, B = 0I(Sin + Sin)/4R

here, = = and R distance b/w the point and the wire. R = a/tan = 0.465 m

therefore, B due to segment 2 is 5.312 * 10^-7 T

to find the direction of the field, align the thumb of ur right hand in the direction of current and the thrust of ur palm will give the direction. here it is inside the page.

the magnetic fields due to segment 1 and 3 will be 0 because it is 0 for the points lying on the axis of the wire.

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