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Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
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16.13 | Energy Stored in a Magnetic Field. Energy Density of a Magnetic Field. Mutual Induction |
1) What is the magnetic energy stored in the inductor shown in the figure? The inductor is 12 cm long, 4 cm2 thick and it contain 120 turns. The battery produces 24 V and the resistor has a resistance of 0.4Ω. Take μ0 = 4π × 10-7 N/A2.
Correct Answer: C
2) What is the energy density of the magnetic field stored in the inductor shown in the figure?
Correct Answer: B
3) The rheostat in the figure switches between two values, r1 = 6 Ω and r2 = 2 Ω in one second. As a result, a 3V emf is induced in the second coil (on the left). What is the change in the magnetic flux Φ21 produced by the second coil on the inner surface of the fist (single) coil?
Correct Answer: B
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