Question

2. A coil with N turns is placed into an electromagnet. The magnetic field increases linearly in time, reaching a value of B0 = 0.1T after time t = 10s. Then, it remains constant. The coil has a cross sectional area of A = 100cm2, and it is oriented perpendicularly to the magnetic field. (a) What voltage is induced in the coil? (b) Let the coil have a resistance of R = 0.5?. What is the magnitude of the current in the coil if the ends of the coil are closed? (c) How much energy is dissipated during the switching-on of the magnet? N turns R B Figure 2: Coil of N turns placed into an electromagnet.

          2. A coil with N turns is placed into an electromagnet. The magnetic field increases linearly in time, reaching a value of B0 = 0.1T after time t = 10s. Then, it remains constant. The coil has a cross sectional area of A = 100cm2, and it is oriented perpendicularly to the magnetic field.

(a) What voltage is induced in the coil?
(b) Let the coil have a resistance of R = 0.5?. What is the magnitude of the current in the coil if the ends of the coil are closed?

(c) How much energy is dissipated during the switching-on of the magnet?

N turns
R
B
Figure 2: Coil of N turns placed into an electromagnet.

2. A coil with N turns is placed into an electromagnet. The magnetic field increases linearly in time, reaching a value of B0 = 0.1T after time t = 10s. Then, it remains constant. The coil has a cross sectional area of A = 100cm2, and it is oriented perpendicularly to the magnetic field.

(a) What voltage is induced in the coil?
(b) Let the coil have a resistance of R = 0.5?. What is the magnitude of the current in the coil if the ends of the coil are closed?

(c) How much energy is dissipated during the switching-on of the magnet?

N turns
R
B
Figure 2: Coil of N turns placed into an electromagnet.

Added by Brian K.

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