In an electromagnetic wave, the direction of the magnetic field induction B is:
Correct answer: B. Perpendicular to electric field E
- A. Parallel to electric field E
- B. Perpendicular to electric field E
- C. Antiparallel to Pointing vector S
- D. Random
Explanation
In an electromagnetic wave, the direction of the magnetic field induction B perpendicular to electric field E.
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Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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