RLC Circuits Objectives PART 4
61 ; The current drawn by the circuit at resonance frequency will be 0.1A.
62 ; Questions 62 to 65 refer to data given below:A series circuit consists ofR .47 C= 10 p.F, and
an ac supply of 100 V with f = 300 Hz. The current through R is1.41A.
63 ; The voltage across R is66.3V.
64 ; The voltage across C is 74.9V.
65 ; The phase angle of the current with respect to Al supply voltage is (A) 56.5′ (B) 48.5°(C) 40.5°
66 ; Questions 66 to 70 refer to data given : below : A series RLC circuit has R = 33 SI, L= 50
mH and C= 10 p.F. The supply voltage is 73 V with a frequency of 200 Hz.The circuit
impedance is 33 -j 16.8. 67.
67 ; The current through the circuit is 2.03 A.
68 ; The maximum voltage will appear acrossCapacitance.
69 ; The minimum voltage will appear across Resistance.
70 ; The voltage across inductance will be 127V.
- Questions 71 to 73 refer to data given below:A parallel RLC circuit shown in figure has
R=1000,L=20mHandC =10A. The supply voltage is 35 volts with the frequency of 500 Hz.The supplycurrent is 646 mA.
72 ; The maximum current will pass through capacitance.
73 ; The least current will pass through resistance.
74 ; Questions 74 and 75 refer to data given: A low-pass filter has L= 20 mH and C = 0.12 micro
F. The input signal amplitude is 2V peak-to-peak and its frequency is 5 kHz. An unwanted
noise input is also present with an amplitude of 0.2 V peak-to-peak and a frequency of 50
Hz. The signal-to-noise ratio at the input is 10.
75 ; The signal-to-noise ratio at the output is 1700.
76 ; Questions 76 and 77 refer to data given: A high-pass filter has a resistance R = 2k ohm. The
lowest input frequency to be passed is7.5 kHz. The value of suitable coupling capacitor must
be 0.1micro F.
77 ; The attenuation of the filter for 60-Hz frequencies will be 0.075.
78 ; Questions 78 to 80 refer to data given below : A 100 W electric lamp is 115 V, 60 Hz source.
The current flowing is 870 mA.
79 ; The resistance of the filament is 132 ohms.
80 ; The peak instantaneous power dissipated in a lamp filament is 200W.