Problem 1: An electric current I= 0.45 A is flowing in an infinitely long wire. Randomized Variables A I= 0.45 A Part (a) Write an equation for the magnetic field vector B generated by the current at an arbitrary point in terms of I, the length element dl, and the vector for the distance R from dl to the point. dl x R Rx dl Hol SRx dl B = - B = Hol. B = R3 Hol R3 R3 R3 Hol s dl x R В — 4n Hol B = - Hol s dl x R R3 dl x RB = R3 Submit Hint Feedback I give up! Part (b) If the distance from point A to the wire is a as in the figure, write an equation for the magnitude of the magnetic field B| generated by the current at A in terms of I and a. 1-----c 与一

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4n J dl x RB :
Problem 1: An electric current I = 0.45 A is flowing in an infinitely long wire.
Randomized Variables
A
I= 0.45 A
I
Part (a) Write an equation for the magnetic field vector B generated by the current at an arbitrary point in terms of I, the length element dl, and the
vector for the distance R from dl to the point.
dl x R
Rx dl
Hol SRx dl
B =
B = -
В —
R3
R3
R3
Ho.
Hol
Hol
B = -
R3
dl x R
Hol
B =
47
dl x R
4) ai x RB = -
R3
R3
Submit
Hint
Feedback
I give up!
IL
Part (b) If the distance from point A to the wire is a as in the figure, write an equation for the magnitude of the magnetic field [B| generated by the
current at A in terms of I and a.
Part (c) If a = 0.035 m, calculate the numerical value of B in tesla.
Transcribed Image Text:4n J dl x RB : Problem 1: An electric current I = 0.45 A is flowing in an infinitely long wire. Randomized Variables A I= 0.45 A I Part (a) Write an equation for the magnetic field vector B generated by the current at an arbitrary point in terms of I, the length element dl, and the vector for the distance R from dl to the point. dl x R Rx dl Hol SRx dl B = B = - В — R3 R3 R3 Ho. Hol Hol B = - R3 dl x R Hol B = 47 dl x R 4) ai x RB = - R3 R3 Submit Hint Feedback I give up! IL Part (b) If the distance from point A to the wire is a as in the figure, write an equation for the magnitude of the magnetic field [B| generated by the current at A in terms of I and a. Part (c) If a = 0.035 m, calculate the numerical value of B in tesla.
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