(10) A circular loop of wire of radius r 5.0 cm is in a uniform magnetic field B
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Question
(10) A circular loop of wire of radius r 5.0 cm is in a uniform magnetic field B 05 Tesla 5 pts (a) Calculate the magnetic flux in the loop, when B is perpendicular to the face of the loop. Answer- 5 pts. (b) Calculate the magnetic flux in the loop, when B is at an angle of 40 degrees to the area of the loop. Answer 5 pts. (c) Calculate the magnetic flux in the loop, when B is parallel to the face of the loop. Answer 10 pts. (12) A rectangular coil of area 0.50 m by 0.80 m is positioned so that its cross- sectional area is perpendicular to the direction of a magnetic field. The coil has 80 turns and a total resistance of 12.0 ?, and the field increases at a rate of 8.0 Tesla/second. Calculate the magnitude of the induced current in the coil. Answer- (13) An ideal transformer has a primary with 75.0 turn and a secondary with 200.0 tur The load resistance is 50.0 Ohms and the source voltage is 90.0 volts. 5 pts (a) Calculate the electric potential (voltage) across the 50.0 Ohm resistor. (This problem is continued on the next page.) AnswerExplanation / Answer
A) Area of loop, A = pi x 0.05^2 = 0.00785 m^2
Magnetic flux, phi = B A = 0.5 x 0.00785 = 0.004 T m^2
B) flux= BA dos 40= 0.004 cos 40= 3.064*10^-3 Tm^2
C) flux= BA cos90= 0 Tm^2
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