Capacitance and Capacitors
Physics ⇒ Electricity and Magnetism
Capacitance and Capacitors starts at 11 and continues till grade 12.
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See sample questions for grade 12
A capacitor is charged to a potential difference V and then disconnected from the battery. If the plates are pulled apart to double their separation, what happens to the energy stored in the capacitor?
Describe one practical application of capacitors in electronic circuits.
Explain the effect of inserting a dielectric slab between the plates of a capacitor.
Explain why a capacitor blocks direct current (DC) after being fully charged but allows alternating current (AC) to pass through.
If a capacitor is connected to a battery and then disconnected, what happens to the charge on the capacitor if the dielectric is removed?
State one difference between a fixed capacitor and a variable capacitor.
State the relationship between charge (Q), capacitance (C), and voltage (V) for a capacitor.
What is the SI unit of capacitance?
A capacitor is connected to a battery and reaches steady state. If the battery is then removed and the separation between the plates is halved, what happens to the voltage across the capacitor?
A capacitor of 6 μF is charged to 120 V. It is then connected in series with an uncharged 3 μF capacitor. What is the final voltage across the 3 μF capacitor?
Explain why the energy stored in a capacitor increases when a dielectric is inserted between the plates while the capacitor is connected to a constant voltage source.
