# Self-induction

Electricity and Magnetism Level 2

[A] is a circuit connected in series with resistor of resistance $$R,$$ coil of self-inductance $$L,$$ and power supply of voltage $$V$$. If we turn on the switch at $$t_0$$ and turn it off at $$t_2$$, the intensity of the current flowing through the resistor changes with time as in [B]. Which of the following statements is correct?

a) The direction of the current between $$t_0$$ and $$t_1$$ is the b direction in [A].

b) The resistance effect of the coil is maximized between $$t_1$$ and $$t_2.$$

c) The intensity of internal magnetic field inside the coil is constant between $$t_2$$ and $$t_3.$$

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