Q2/ The current through a 100-μF capacitor is given. Find the sinusoidal expression for the voltage across the capacitor. i = 40 sin(500t+60°)

A parallel-plate capacitor has plates of area 124.0 cm² and a separation of 1.00 cm. A battery charges the plates to a potential difference of 121.0 Vand is then disconnected. A dielectric slab of thickness 4.60 mm and dielectric constant 6.40 is then placed symmetrically between the plates. Find the capacitance before the slab is inserted. 1.098

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R 1. Measure the internal resistance of the 1mH inductor. Set up the given circuit with R = 270n and L = 1mH. Apply a sinusoidal voltage as input. Adjust V, = 4Vpp and set the frequency as 20kHz. Observe the input voltage and the V, L voltage across the inductor simultaneously using an ocilloscope and plot both signals. Find the phase difference between these signals and comment on the results.