Select correct statements
(a) charge cannot be isolated
(b) Repulsion is the sure test to know the presence of charge
( c) Waxed paper is dielectric in paper capacitor
(d) Variable capacitor is used in tuning circuits in ratio.

Choose the correct statements from the following for the given situation. The dielectric can be inserted into the plates of a capacitor when (i) The capacitor is connected to the battery (ii) the capacitor is disconnected from the battery (iii) the capacitor is discharging and plates are removed (iv) the capacitor is charging without the plates

consider the following statement A and B , and select the correct choice A: Repulsion is a sure test of magnetism. (B) : Magnetic induction precedes attration.

A parallel plate capacitor has a dielectric slab of dielectric constant K between its plates that covers 1//3 of the area of its plates, as shown in the figure. The total capacitance of the capacitor is C while that of the portion with dielectric in between is C_1 . When the capacitor is charged, the plate area covered by the dielectric gets charge Q_1 and the rest of the area gets charge Q_2 . The electric field in the dielectric is E_1 and that in the other portion is E_2 . Choose the correct option/options, ignoring edge effects.

A parallel plate capacitor has a dielectric slab of dielectric constant K between its plates that covers 1//3 of the area of its plates, as shown in the figure. The total capacitance of the capacitor is C while that of the portion with dielectric in between is C_1 . When the capacitor is charged, the plate area covered by the dielectric gets charge Q_1 and the rest of the area gets charge Q_2 . The electric field in the dielectric is E_1 and that in the other portion is E_2 . Choose the correct option/options, ignoring edge effects.

The capacitance of a capacitor depends on (A) Charge on the plates (B) the size of the plates (C) the shape of the plates (D) the separation between the plates

Three capacitors A , B and C are connected to a battery of 25volt as shown in the figure. The ratio of charges on capacitors A

A parallel plate capacitor filled with a material of dielectric constant K is charged to a certain voltage and is isolated. The dielectric material is removed. Then (a) The capacitance decreases by a factor K (b) The electric field reduces by a factor K (c ) The voltage across the capacitor increases by a factor K (d) The charge strored in the capacitor increases by a factor K

A parallel plate capacitor filled with a material of dielectric constant K is charged to a certain voltage and is isolated. The dielectric material is removed. Then (a) The capacitance decreases by a factor K (b) The electric field reduces by a factor K ( c) The voltage across the capacitor increases by a factor K (d) The charge stored in the capacitor increases by a factor K .

Consider the following two statements A and B and identify the correct answer. {:A) At resonance of L-C series circuit, the reactance of circuit is minimum. {:B) The reactance of a capacitor is an A.C circuit is similar to the reactance of a capacitor in a D.C circuit

The space between the rectangular plates (with sides a and b ) of a parallel-plato capacitor (the distance between the plates is l) is filled with a solid dielectric whose dielectric constant is c. The capacitor is charged to a certain potential difference and disconnected from the voltage source. After that the dielectric is slowly moved out of the capacitor, which lTIOanS that the section x not filled with the dielectric gradually increases in size. How wi ll the potential difference between the plates and the surface charge densities on both parts of the capacitor (with and without the dielectric) change in the process?