A capacitor of capacitance is connected across a (rms) domestic supply operating at
PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A capacitor of capacitance 5.0μF is connected across a 230V (rms) domestic supply operating at 60Hz. Answer the following.
(i) Calculate the capacitive reactance at 60Hz.
(ii) Determine the rms current drawn by the capacitor.
(iii) The household wishes to run the same capacitor at a frequency where its reactance drops to 200Ω. Keeping the capacitance unchanged, calculate the frequency required to obtain this reactance.