Home
Class 12
PHYSICS
For an LCR circuit, the power transferre...

For an LCR circuit, the power transferred from the driving source to the driven oscillator is `P=I^2Z cos phi`.

A

(a) Here, the power factor `cos phi ge 0, P ge 0`.

B

(b) The driving force can give no energy to the oscillator (P = 0) in some cases.

C

(c) the driving force cannot syphon out (P lt 0) the energy out of Oscillator

D

(d) All of these.

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

A series LCR circuit with L=0.12H, C = 480 nF, R= 23 Omega is connected to a 230 V variable frequency supply. For which frequencies of the source is the power transferred to the circuit half the power at resonant frequency? What is the current amplitude at these frequencies?

A series LCR circuit with R = 20Omega (Ohm), L = 1,5H (Henry) and C= 35muF (Micro farad) is connected to a variable frequency 200 V (Volt) a.c. supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle ?

A series LCR circuit with R= 20 Omega ,L=1.5H and C = 35 muF is connected to a variable-frequency 200 V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?

In an a.c. circuit, the votlage applied is E = E_0 sin omegat . The resultig current in the circuit is I = I_0 sin (omegat - pi//2) . The power consumption in the circuit will be

In an LCR-circuit, capacitance is changed from C to 2 C. For the resonant frequency to remain unchanged, the inductance should be changed form L to

If p and q are respectively the perpendiculars from the origin upon the striaght lines, whose equations are x sec theta + y cosec theta =a and x cos theta -y sin theta = a cos 2 theta , then 4p^(2) + q^(2) is equal to

If p and q are the lengths of perpendicular from origin to the lines x cos theta-y sin theta=k cos 2 theta and x sec theta +y "cosec" theta =k respectively. Prove that p^(2)+4q^(2)=k^(2) .

In a series LCR circuit R = 200 Omega and the voltage and the frequency of the main supply is 220 V and 50 Hz respectively. On taking out the capacitance from the circuit the current lags behind the voltage by 30^@ . On taking out the inductor from the circuit the current leads the voltage by 30^@ . The power dissipated in the LCR circuit is

The given circuit diagram shows a series LCR circuit connected to a variable frequency 230 V source. Determine the source frequency which drives the circuit in resonance.