Which of the following materials has no free charge?
Correct answer: A. Metals
- A. Metals
- B. Dielectrics
- C. Conductors
- D. Semi-conductors
Explanation
The correct answer is Metals because they have free charges that can move easily. Dielectrics do not have free charges and are insulators. Conductors like metals have free charges. Semiconductors have some free charges but less than metals.
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About Capacitors
Capacitors store electric charge and energy in an electric field between conductors. Work includes capacitance, the relation Q = CV, dielectric materials, charging and discharging, energy formulas, and combinations of capacitors in series and parallel. Electric potential difference is needed to understand why charge and stored energy change.
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