True /False Questions Capacitor is a circuit element and can store electric char

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True /False Questions

Capacitor is a circuit element and can store electric charge A capacitor consists of two or three conductors. Capacitance is a capacity. Just like the capacity of a milk-bottle is the volume of milk it can store. The capacitance of a capacitor is the amount of maximum charge the capacitor can store Capacitance is a capacity. The amount of charge stored in a capacitor is proportional to the voltage difference between the two conductors of the capacitor. The capacitance is the amount of charge the capacitor can store per unit of voltage difference. When there are two capacitors, the one with more charges stored has a higher capacitance. When there are two capacitors, if they have the same potential difference, the one with more charges stored has a higher capacitance. When there are two capacitors, the one with less potential difference has a higher capacitance When there are two capacitors which stored the same amount of charges, the one with less potential difference has a higher capacitance You can increase the capacitance of a capacitor by adding more charges on it You cannot increase the capacitance of a capacitor by adding more charges on it. Because when it stores more charges, the potential difference (voltage difference) between the two conductors also increases, the ratio between Q and AV will not change u cannot increase the capacitance of a capacitor by adding more charges on it, because the capacitance of a conductor is determined by its shape and the separation between the two conductors Consider the definition equation of capacitance: C QAV, its SI unit is equal to (relating it to to Coulomb and Volt) Typical capacitors have a capacitance ranging from pF to KF, which means when it is connected to a battery of 1 Volt, it will only store a "small" amount of charge ranging from 10-12 C to 10 GC When an uncharged capacitor is connected to a battery (that means each plate is connected to one terminal of the battery) charges start to flow to "charge" the capacitor, until the voltage difference between the two plates are equal to the potential difference between the battery's terminals The two plates will have the same amount of charges with opposite sign uick Quiz 26.1 A capacitor stores charge Qat a potential difference AV What happens if the voltage applied to the capacitor by a battery is doubled to 2 AV? (a) The capacitance falls to half its initial value, and the charge remains the same. (b) The capacitance and the charge both fall to half their initial values (c) The capacitance and the charge both double. (d) The capacitance remains the same, and the charge double

Explanation / Answer

1. True

2. False ( it contains only two conductors or single conductor )

3. True

4. True

5 False

6. False ( capacitance is independent of the charge and potential difference between the plates)

7. False

8. False

9. false

10 True

11. True

12 SI unit is Farad is equals to 1C/V

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