NEET Physics Alternating Current MCQs

A series LCR circuit with a 5.0 H inductor, an $80 \mu F$ capacitor, and a $40 \Omega$ resistor is connected to a 230V variable frequency AC source. Find the angular frequencies of the source at which the power transferred to the circuit is half the power at the resonant angular frequency.

In a series LCR circuit with L = 2.5 H, C = $40 \mu F$, and R = $20 \Omega$ connected to a 115V variable frequency AC source, determine the angular frequencies at which the power transferred is half the power at resonance.

A radio receiver uses a series LCR circuit with L = 10 mH, C = $100 pF$, and R = $50 \Omega$. If the input signal voltage is 1 mV, find the angular frequencies at which the power absorbed by the circuit is half the power at resonance.

In a series LCR circuit, the half-power frequencies are 45 rad/s and 55 rad/s. If the resistance is $40 \Omega$, what is the inductance if the capacitance is $80 \mu F$?

A series LCR circuit with R = $60 \Omega$ has half-power frequencies of 200 rad/s and 300 rad/s. If the inductance is 0.1 H, what is the capacitance?

For optimal performance in a communication circuit utilizing an $L-C-R$ configuration, which of the following combinations offers the most effective tuning?

An $L-C-R$ circuit is used for communication purposes. To maximize the circuit's sensitivity to a specific frequency, which combination of $L$, $C$, and $R$ values should be chosen?

In an $L-C-R$ circuit designed for communication, minimizing the bandwidth of the received signal is crucial. Which of the following combinations of $L$, $C$, and $R$ values would best achieve this narrow bandwidth?

To achieve sharp resonance in an $L-C-R$ circuit used for communication, what should be the ideal combination of inductance ($L$), capacitance ($C$), and resistance ($R$) values?

Which of the following combinations of $L$, $C$, and $R$ values would lead to a higher quality factor ($Q$) in an $L-C-R$ circuit used in a communication system?