Resonance and Quality Factor

JEE Main Physics · Alternating Current · 16 questions, latest first

• A series LCR circuit with R=20 Ω, L=1.6 H and C=40 μ F is connected to a variable frequency a.c. source. The inductive reactance…20265 April, Shift 2 · Q48
• Using a variable frequency a.c. voltage source the maximum current measured in the given LCR circuit is 50 mA for V=5 sin (100 t)…202623 January, Shift 1 · Q46
• In a series LCR circuit, a resistor of 300 Ω, a capacitor of 25 nF and an inductor of 100 mH are used. For maximum current in the…202523 January, Shift 2 · Q49
• A series LCR circuit is connected to an alternating source of emf E. The current amplitude at resonant frequency is I_0. If the…202522 January, Shift 2 · Q39
• A LCR circuit is at resonance for a capacitor C, inductance L and resistance R. Now the value of resistance is halved keeping all…20248 April, Shift 1 · Q50
• For a given series LCR circuit it is found that maximum current is drawn when value of variable capacitance is 2.5 nF. If…20246 April, Shift 2 · Q59
• Given below are two statements: Statement I: In an LCR series circuit, current is maximum at resonance. Statement II: Current in…20246 April, Shift 1 · Q44
• In series LCR circuit, the capacitance is changed from C to 4C. To keep the resonance frequency unchanged, the new inductance…20241 February, Shift 1 · Q43
• Given below are two statements: Statement I: When the frequency of an a.c source in a series LCR circuit increases, the current…202312 April, Shift 1 · Q35
• A series combination of resistor of resistance 100 Ω, inductor of inductance 1 H and capacitor of capacitance 6.25 μ F is…20238 April, Shift 2 · Q58
• Match List I with List II: Choose the correct answer from the options given below:20231 February, Shift 1 · Q8
• A series LCR circuit is connected to an ac source of 220 V, 50 Hz. The circuit contain a resistance R=100 Ω and an inductor of…20231 February, Shift 1 · Q25
• An inductor of 0.5 mH, a capacitor of 20 μ F and resistance of 20 Ω are connected in series with a 220 V ac source. If the…202331 January, Shift 1 · Q29
• An inductor of inductance 2 μ H is connected in series with a resistance, a variable capacitor and an AC source of frequency 7…202329 January, Shift 2 · Q24
• An LCR series circuit of capacitance 62.5 nF and resistance of 50 Ω, is connected to an A.C. source of frequency 2.0 kHz. For…202325 January, Shift 1 · Q23
• In the circuit shown in the figure, the ratio of the quality factor and the band width is ____ s.202324 January, Shift 1 · Q28