Ampere Maxwell law is applicable to all closed paths inside or outside the plates of the capacitor. Explain.

Figure 8.6 shows a capacitor made of two circular plates each of radius 12 cm, and separated by 5.0 cm. The capacitor is being charged by an external source (not shown in the figure). The charging current is constant and equal to 0.15A. Is Kirchhoffs first rule (junction rule) valid at each plate of the capacitor? Explain. :

Explain why the capacitance of capacitor increases when dielectri slab is inserted between the plates of the capacitor. Derive an expression for energy stored in a charged capacitor.

Figure shows two identical capacitors C_1 and C_2 each of 1 mu F capacitance connected to a battery of 6 V. initially switch S is closed. After sometime S is left open and dielectric slab of dielectric constant k = 3 are inserted to fill completely the space between the plates of the two capacitors. How will the potential difference between the plates of the capacitors be affected after the slabs are inserted?

Figure shows two identical capacitors C_1 and C_2 each of 1 mu F capacitance connected to a battery of 6 V. initially switch S is closed. After sometime S is left open and dielectric slab of dielectric constant k = 3 are inserted to fill completely the space between the plates of the two capacitors. How will the Charge between the plates of the capacitors be affected after the slabs are inserted?

Explain why the capacitance of capacitor increases when dieslectric slab is inserted between plates of the capacitor.

Explain why the capacitance of capacitor increases when dieslectric slab is inserted between plates of the capacitor.

Show that the force on each plate of a parallel plate capacitor has a magnitude equal to (1/2) QE, where Q is the charge on the capacitor, and E is the magnitude of electric field between the plates. Explain the origin of the factor 1/2.

Answer the following questions: Is Ohm’s law universally applicable for all conducting elements? If not, give examples of elements which do not obey Ohm’s law.