Which of these effects does not depend on the direction of current?
Correct answer: B. Heating effect
- A. Chemical effect
- B. Heating effect
- C. Magnetic effect
- D. None
Explanation
The heating effect (P = I²R) depends on the square of the current, making it independent of direction. The chemical effect (electrolysis) and magnetic effect (field direction) both depend on the direction of current flow.
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About Alternating Current
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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