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 11
A capacitor is charged to a potential difference V and then disconnected from the battery. If the plate separation is increased, what happens to the charge on the plates?
A capacitor is connected to a battery and then disconnected. If a dielectric is inserted between the plates, what happens to the voltage across the plates?
Describe the effect of connecting a capacitor to a DC battery for a long time.
Describe the process of charging a capacitor through a resistor.
A capacitor is charged to a potential difference V and then disconnected from the battery. If the plate separation is increased, what happens to the charge on the plates?
A capacitor is connected to a battery and then disconnected. If a dielectric is inserted between the plates, what happens to the voltage across the plates?
A parallel plate capacitor has a capacitance of 5 μF. If the distance between the plates is doubled, what will be the new capacitance?
A parallel plate capacitor has plates of area 0.02 m2 separated by 1 mm. If the dielectric constant is 5, calculate its capacitance. (ε0 = 8.85 × 10-12 F/m)
The capacitance of a parallel plate capacitor is directly proportional to which of the following? (1) Area of plates (2) Distance between plates (3) Permittivity of the medium (4) Both 1 and 3
Which of the following arrangements will give the maximum capacitance? (1) Series (2) Parallel (3) Mixed (4) None of these
Which of the following best describes a capacitor? (1) A device that stores charge (2) A device that stores energy (3) Both 1 and 2 (4) None of these
Which of the following is a correct unit for the dielectric constant? (1) Farad (2) No unit (3) Volt (4) Coulomb
A capacitor is said to be fully charged when the potential difference across its plates is equal to the ________ applied to it.
Fill in the blank: The capacitance of a parallel plate capacitor increases if the ________ between the plates is filled with a dielectric material of relative permittivity greater than 1.
Fill in the blank: The energy stored in a capacitor is given by U = ________.
Fill in the blank: The reciprocal of the equivalent capacitance of capacitors in series is equal to the ________ of the reciprocals of their individual capacitances.
If a capacitor is connected to an AC source, does it allow current to pass through?
True or False: Inserting a dielectric between the plates of a charged, isolated capacitor increases its capacitance.
True or False: The capacitance of a capacitor depends on the potential difference applied across its plates.
True or False: The energy stored in a capacitor is given by the formula U = 1/2 CV2.
