Question

P-03: The wire shown in the figure carries a current of 4A. (a) What magnetic field B is produced at the center C of the semicircle by each straight segment of length 10 cm? (Positive out of page and negative into page) (b) What magnetic field B is produced at the center C of the semicircle by the semicircular segment of radius R = 15 cm? (c) Calculate magnetic field B in the whole wire. Fig: 1 Fig: 2 P-04: Figure 2 shows a cross section of a toroid - a solenoid consisting of N turns of wire bent around into a circle of radius r. A symmetry argument has already been used to show that the field lines inside the toroid are circles. a) Use Ampere's law to find the magnitude of the field inside the toroid and b) Find the magnitude of the field outside.

          P-03: The wire shown in the figure carries a current of 4A.
(a) What magnetic field B is produced at the center C of the semicircle by each straight segment of length 10 cm? (Positive out of page and negative into page) 
(b) What magnetic field B is produced at the center C of the semicircle by the semicircular segment of radius R = 15 cm? 
(c) Calculate magnetic field B in the whole wire.
Fig: 1
Fig: 2
P-04: Figure 2 shows a cross section of a toroid - a solenoid consisting of N turns of wire bent around into a circle of radius r. A symmetry argument has already been used to show that the field lines inside the toroid are circles. 
a) Use Ampere's law to find the magnitude of the field inside the toroid and 
b) Find the magnitude of the field outside.

Added by Donald G.

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