### 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.