Voltage of power supply: V- = 30 ( V); Current across resistor R: I = 6 ( A); [See Module 7 on Canvas for V. and I values] Measured magnetic field at the center of the solenoid: B. _ = 249.47 Gauss Calculated magnetic field at the center of the solenoid: 5,, = (4piE-7*570*6)=252.81 Gauss % diff. of B. = 1.31%