Problem 20.49 Two long, straight, parallel wires are 10.0 cm apart and carry 3.2

Question

Problem 20.49

Two long, straight, parallel wires are 10.0 cm apart and carry 3.20 A currents in the same direction

I <-------------------------------> I

10 cm

Part A

Find the direction of the magnetic field at point P1, midway between the wires.

Please Choose

The field is directed down.

The field is directed up.

The field is directed to the right.

The field is zero.

The field is directed to the left.

Part B

Find the magnitude of the magnetic field at point P1, midway between the wires.

Express your answer in telsas to three significant figures.

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Part C

Find the direction of the magnetic field at point P2, 28.0 cm to the right of P1.

Please ChooseThe field is directed up. The field is zero. The field is directed down. The field is directed to the right. The field is directed to the left.

SubmitMy AnswersGive Up

Part D

Find the magnitude of the magnetic field at point P2, 28.0 cm to the right of P1.

Express your answer in telsas to three significant figures.

Problem 20.49

Two long, straight, parallel wires are 10.0 cm apart and carry 3.20 A currents in the same direction

I <-------------------------------> I

10 cm

Part A

Find the direction of the magnetic field at point P1, midway between the wires.

Please Choose

The field is directed down.

The field is directed up.

The field is directed to the right.

The field is zero.

The field is directed to the left.

Part B

Find the magnitude of the magnetic field at point P1, midway between the wires.

Express your answer in telsas to three significant figures.

B1= T

SubmitMy AnswersGive Up

Part C

Find the direction of the magnetic field at point P2, 28.0 cm to the right of P1.

Please ChooseThe field is directed up. The field is zero. The field is directed down. The field is directed to the right. The field is directed to the left.

SubmitMy AnswersGive Up

Part D

Find the magnitude of the magnetic field at point P2, 28.0 cm to the right of P1.

Express your answer in telsas to three significant figures.

B2= T

Explanation / Answer

a)

Answer is The field is zero

since the currents from both wires are in same direction at point P1 midway between the wires .the magnetic field from each wire is in opposite direction to each other.

b)

B1=0

c)

the field is directed striaght up.

d)

B2=(uoI/2pi)[1/r1+1/r2]

B2=[(4pi*10-7)*3.2/2pi](1/(0.28+0.05) - 1/(0.28-0.05)]

B2=4.72*10-6T

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