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A capacitor is made with a polymeric dielectric having an εr of 2.26 and a dielectric breakdown strength of 50 kV/cm. The permittivity of free space is 8.85 pF/m. If the rectangular plates of the capacitor have a width of 20 cm and a length of 40 cm, then the maximum electric charge in the capacitor is
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- 2μC
- 4μC
- 8μC
- 10μC
Correct Option: C
q = CV
| = | × V | |
| d |
| = ε.A |  |  | ||
| d |
= εrε0A × E
= 2.26 × 8.85 × 10–14 × 50 × 10³ × 20 × 40
= 8μC
