Three identical lamps are connected in series to each other and to a voltage source. If another identical lamp is added in series connection (all four connected in series), what happens to the brightness of the first three lamps? O Increases O Decreases O Stays the same O Not enough information Which of the following will decrease the capacitance between the plates of a parallel plate capacitor filled with air? I. Decrease the charge on the plates II. Increase the potential difference between the plates III. Increase the separation between the plates IV. Decrease the area of the plates
V. Introduce a dielectric material between the plates O all of them O I, II and IV III O III and IV O III, IV, V