In power loss in a capacitor in A.C circuit is:
Correct answer: D. <P>= zero
- A. P > V°l°
- B. <P>= V°I° sinθl°
- C. <P>= V°I° Cos θl
- D. <P>= zero
Explanation
In purely inductive or purely capacitive circuit, power loss is zero.
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
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Alternating current through a resistor, capacitor and inductor involves phase relationships between voltage and current, reactance, impedance and energy transfer. A resistor keeps voltage and current in phase, while a capacitor and inductor produce opposite phase shifts, a distinction used in circuit diagrams and numerical calculations.
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