A toroidal solenoid has a radius R = 0.5 m and a cross-sectional diameter equal to 10 cm. When a current I passes through the coil of the solenoid, the magnetic field at the center of the solenoid has a magnitude B = 2 μT. What is the largest value of the magnetic field in the solenoid for the same value of the current?
A)3.5 μT
B)1.8 μT
C)2.2 μT
D)0.5 μT
E)2.8 μT

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The Answer of A toroidal solenoid has a radius R = 0.5 m and a cross-sectional diameter equal to 10 cm. When a current I passes through the coil of the solenoid, the magnetic field at the center of the solenoid has a magnitude B = 2 μT. What is the largest value of the magnetic field in the solenoid for the same value of the current?
A)3.5 μT
B)1.8 μT
C)2.2 μT
D)0.5 μT
E)2.8 μT

A Toroidal Solenoid Has a Radius R = 0