### RLC Circuits Objectives PART 06

**101 . ** The shape of impedance versus frequency curve for a parallel resonance circuit is of the

shape as shown in figure A.

**102 . ** The capacitive reactance of a capacitor 1/2Pi F at 10000 H is1/2pi*10000 ohms.

**103 . ** The inductive reactance of an inductance of 1/Pi H at50 H is 100 ohms.

**104 . ** Questions 104 to 110 refer to figure below : For the circuit shown in figure, Q is nearly20.

**105. ** The bandwidth is 80 Hz.

**106 . **The bandwidth of the circuit can be doubled, while maintaining resonance frequency

unaltered, by increasing R to 100.

**107 .** In the circuit what will happen when L is increased? Resonance frequency will decrease.

**108 . ** In the circuit what will happen when C is de creased? Q will increase.

**109 . ** Which of the following will not change when input frequency is changed? Bandwidth

,Resonance frequency and Q.

**110 . ** Any reduction in the value ofR will not change Resonance frequency.

**111 . ** Which of the following will not change when E is increased to 24 volts ?Q, Bandwidth and

Resonance frequency.

**112 . ** A parallel resonance circuit consists of a coil with L= 200 mH and R= 60 ohms and a 130 pF

capacitor. The circuit is connected to a 50 mV source. A) The resonance frequency will be 1

MHz.

**113 . ** Q will be 21.

**114 . ** The current from the source, IT will be1.9μA.

**115 . **The current through conductor will be 40μA.

**116 . ** The value of inductance necessary to produce series resonance at 100 kHz with a capacitor of 0.001μF is2.5 mH.

**117** . A 200 1±H coil has a Q of 250 at resonance frequency of 800 kHz. The effective resistance of coil is4 ohms.

**118 .** An alternating e.m.f. is applied to a pure inductance such that inductive reactance is 10f2. If the frequency of a.c. is doubled, the reactance will become20 ohms

**119 . ** An alternating e.m.f. is applied to a pure capacitance such that the capacitive reactance is 10 Q. If the frequency of a.c. is doubled, the reactance will become5 ohms.

**20 . ** An inductor allows both ac and dc to pass.