Capacitors & Dielectrics Mock Tests

A spherical conductor of radius R₁ is charged to potential V. It is connected by a thin conducting wire to another uncharged spherical conductor of radius R₂. The final common potential is:

Two capacitors of capacitance 2 μF and 4 μF are connected in series. The equivalent capacitance is:

A capacitor of capacitance 100 μF is charged to a potential difference of 100 V. The energy stored in the capacitor is:

A parallel plate capacitor is charged and then disconnected from the battery. If the plates are now pulled apart, the energy stored in the capacitor will:

A parallel plate capacitor with air between the plates has capacitance 8 pF. If the distance between plates is halved and the space is filled with a dielectric of constant K = 6, the new capacitance is:

A parallel plate capacitor has capacitance C in air. If a dielectric of constant K = 3 is inserted between the plates, the new capacitance is:

Three identical capacitors each of capacitance C are connected in parallel. Their equivalent capacitance is:

A parallel plate capacitor with air between the plates has capacitance C. If a dielectric of constant K = 4 is inserted completely between the plates, the new capacitance will be: