Electrostatics ...

A sphere of radius 1 m encloses a charge of 5µC. Another charge of –5µC is placed inside the sphere. The net electric flux would be

Three capacitors are connected to a d.c source of 100 V as shown in Fig. If the charge accumulated on the plates of C₁, C₂ and C₃ are q_a,q_b, q_c, q_d, q_e and q_f respectively, then

In the combination of capacitors shown in Fig., the potential difference across the plates of the capacitor A will be

A capacitor C₁ of capacitance 1 µF and capacitor C₂ of 2µF are separately charged fully by a common battery. The two capacitors are then allowed to discharge through equal resistors. Then

A thin metal plate M is inserted between the plates of a parallel plate capacitor as shown in Fig. The new capacitance in terms of initial capacitance C is

A capacitor of capacity C₁ =1µF is charged to a potential of 100 V. The charging battery is then removed and it is connected to another capacitor of capacity C₂ = 2µF. One plate of C₂ is earthed as shown in Fig. The charges on C₁ and C₂ in steady state will

A 10 µF capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt. The capacitance of second capacitor is

In the given circuit with steady current, the potential drop across the capacitor must be

Consider the situation shown in Fig. The capacitor A has a charge q on it whereas B is uncharged. The charge appearing on the capacitor B a long time after the switch is closed is