Home › CBSE Class 12 (Science) › Physics › Alternating Current › A capacitor is connected to an ac source whose f…
A capacitor is connected to an ac source whose frequency is then doubled. The rms current
AIs halved
BIs doubled
CStays the same
DBecomes zero
Answer & Solution
Correct answer: B. Is doubled
Doubling frequency halves the reactance, so with the same voltage the current doubles.
Related questions
A 10 A rms alternating current has a peak value of about:In a series RC circuit with R equal to XC, the phase angle is:A 10 ohm resistor carries a current of peak value 2 A. Mean power is:A circuit has V = 200 V rms, I = 2 A rms and power factor 0.5. Average power is:The peak value of a mains voltage is 311 V. Its rms value is about:A 10 microfarad capacitor is used at w = 1000 rad/s. Its reactance is:An inductor of 0.1 H is connected to a 50 Hz ac source. Take pi = 3.14. XL is about:If the tuning capacitance of a resonant circuit is made four times, the resonant frequency