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NEET PHYSICSMedium

A 10 μ\muF capacitor is connected to a 210 V, 50 Hz source. The peak current in the circuit is nearly (π=3.14\pi = 3.14):

A

0.93 A

B

1.20 A

C

0.35 A

D

0.58 A

Step-by-Step Solution

To find the peak current (imi_m), we first calculate the peak voltage (VmV_m) and the capacitive reactance (XCX_C).

  1. Peak Voltage (VmV_m): The given source voltage is the RMS value (Vrms=210V_{rms} = 210 V). According to the sources, Vm=Vrms2=210×1.414296.94V_m = V_{rms}\sqrt{2} = 210 \times 1.414 \approx 296.94 V .
  2. Capacitive Reactance (XCX_C): XC=1ωC=12πfCX_C = \frac{1}{\omega C} = \frac{1}{2\pi f C}. Substituting the values: XC=12×3.14×50×10×106=1314×105318.47 ΩX_C = \frac{1}{2 \times 3.14 \times 50 \times 10 \times 10^{-6}} = \frac{1}{314 \times 10^{-5}} \approx 318.47 \ \Omega .
  3. Peak Current (imi_m): im=VmXC=VmωC=296.94×(314×105)0.932i_m = \frac{V_m}{X_C} = V_m \omega C = 296.94 \times (314 \times 10^{-5}) \approx 0.932 A. Thus, the peak current is nearly 0.93 A.
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