NEET Physics Alternating Current Questions Solved

(i) An a.c. source of voltage V=V0 sin ωt is connected to a series combination

of L,C and R. Use the phasor diagram to obtain expressions for impedance of

the circuit and phase angle between voltage and current. Find the condition 

when current will be in place with the voltage. What is the circuit in this 

condition called?

(ii) In a series LR circuit XL=R and power factor of the circuit is P1. When 

capacitor with capacitance C such that XL=XC is put in series, the power 

factor becomes P2. Calculate P1/P2.                                          (5 marks)

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