In `LCR` circuit at resonance current in the circuit is `10 sqrt(2) A`. If tnow frequency of the source is changed such that now current lags by `45^(@)` that applied voltage in the circuit . Which of the following is correct.
A
Frequency must be increased and current after the change is 10 A
B
Frequency must be decreased and current after the change is 10 A
C
Frequency must be decreased and current is same as that of initial value
D
The given information is insufficient to conclude anything
In a circuit, the current lags behind the voltage by a phase difference of pi//2 , the circuit will contain which of the following ?
Resonance occures in a series LCR circuit when the frequency of the applied emf is 1000 Hz.
An a.c. source of angular frequency omega is fed across a resistor R and a capacitor C in series. The current registered is I. If now the frequency of the source is changed to omega//3 (but maintaining the same voltage), the current in the circuit is found to be halved. calculate the ratio of reactance to resistance at the original frequency omega .
In a series LCR circuit, the frequency of the source is more than resonance frequency. The current in the circuit leads the voltage in phases(True/false).
In a series LCR circuit resonance of frequency is the half of the frequency of source.The nature of the circuit is
An AC voltage source is applied across an R-C circuit. Angular frequency of the source is omega , resistance is R and capacitance is C. The current registered is I. If now the frequency of source is changed to omega/2 (but maintaining the same voltage), the current in the circuit is found to be two third. calculate the ratio of reactance to resistance at the original frequency omega .
In an ac circuit, the current lags behind the voltage by pi//3 . The components in the circuit are
In a circuit L, C and R are connected in series with an alternating voltage source of frequency f . The current lead the voltages by 45^(@) . The value of C is :
In a circuit L, C and R are connected in series with an alternating voltage source of frequency f . The current lead the voltages by 45^(@) . The value of C is :
In a circuit L, C and R are connected in series with an alternating voltage source of frequency f . The current lead the voltages by 45^(@) . The value of C is :
