Q1. Choose the correct answer of the following questions: 1. A voltage is applied to an R-C circuit with variable resistance, the admittance locus are half circle with radius: (A) 1/2R (B) 1/28 2. In a series circuit on resonance, the following will occur: (A) XL=XC (B) ZT-C (C) V/R (C) VR=0 volts (D) V/XC (D) All choices 3. At resonance to convert the serial branch to parallel. The Parallel resistance finding as: (A) Rp = Rs(1+Q3) (C) Rp = Rs(1+Qs) (B) Rp = Rs(1+7) (D) Rp = Rs(1+++) 4. RC is the time constant of resistance-capacitance circuit and unit is: (A) Ohm-Farad (B) Sec. (C) Unit Less (D) Sec² 5. The value of capacitance is needed to resonate at 0.5KHz with an inductance of 8.443 mH is: (C) 12nF (A) 120μF (D) 12µF 6. The period of one cycle of sinusoidal waveform is 0.0166 sec, what will be frequency of the waveform? (A) 50 Hz (B) 1.2μF (B) 60 Hz 7. The expression for energy stored in a capacitor is: (A) C.V (B) C dv/dt. (C) 6 Hz (C) C/v (D) 100 Hz (D) (1/2) cv2 (C) Zero (D) infinity the voltage across inductor. (D) Equal to 8. In RLC series circuit, at resonance condition the value of current is: (B) Minimum (A) Maximum 9. At resonant frequency, the voltage across capacitor is (A) Greater than (B) Less Than (C) Greater than or equal to