In the figure a compass sits 1.1 cm above a wire in a circuit containing a 1.0F

Question

In the figure a compass sits 1.1cm above a wire in a circuit containing a 1.0F capacitor charged to 4.8V , a 1.0? resistor, and an open switch. The compass is lined up with the earth's magnetic field. The switch is closed, so that there is a current in the circuit, and the switch remains closed until the capacitor has completely discharged.

a) What is magnitude of the magnetic field due to the current in the wire right after the switch is closed? Answer in T

b) How does this compare with the magnitude of the field of the earth (B earth?5

Explanation / Answer

i=1 amp

B=munot*1/2*pie*0.011=1.818*10^-5 T

total b = 6.1818*10^-5 T

b) 80.88%

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