Two long parallel wires each carry 2.0 A in the same direction, with their cente

ID: 1423991 • Letter: T

Question

Two long parallel wires each carry 2.0 A in the same direction, with their centers 2.0 cm apart.

Part A

Find the magnitude of the magnetic field halfway between the wires.

Express your answer to two significant figures and include the appropriate units.

Part B

Find the magnitude of the magnetic field at a point in the same plane as the wires, 2.0 cm from one wire and 4.0 cm from the other.

Express your answer to two significant figures and include the appropriate units.

Part C

Find the magnitude of the force of interaction (per length) between the wires.

Express your answer to two significant figures and include the appropriate units.

Part D

Tell whether the force is attractive or repulsive.

a.attractivere

B.pulsive

Magnetic field due a wire => B = U0I/2*pi*r

A) Using thumb rule to find the direction of magnetic field gives that they are opposite to each other. => the net field is zero.

B) The field is additive in this case with B = U0I/2*pi (1/0.02 + 1/0.04) = 3*10-5 Tesla

C) F = U0I1I2/2*pi*d = 4*10-5 N/m

D) Wires carrying current in same direction attract each other.

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