**Exercise4**

**1.**Suppose a coil has an inductance of 0.500 H, and the frequency of the ac passing through it is 60.0Hz. What is the inductive reactance?

**2.**What will be the inductive reactance of a coil (inductance of 0.500 H) if the supply is a battery that supplies pure dc?

**3.**If a coil has an inductive reactance of 100 ohms at a frequency of 5.00 MHz, what is its inductance?

**4.**Suppose an

*RL*circuit operates at a frequency of 1.0 MHz with a resistance of 10 ohms and an inductance of 90 mH. What is the phase angle?

**5.**Suppose the inductive reactance in an

*RL*circuit is 680 ohms and the resistance is 840 ohms. What is the phase angle?

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