Alternating Current questions
577 published questions with worked solutions.
- A series LCR circuit is subjected to an AC signal of 200 V, 50 Hz. If the voltage across the inductor (L = 10 mH) is 31.4 V, then...
- Given below are two statements: Statement I: In an LCR series circuit, current is maximum at resonance. Statement II: Current in...
- When a dc voltage of 100V is applied to an inductor, a dc current of 5A flows through it. When an ac voltage of 200V peak value...
- A LCR circuit behaves like a damped harmonic oscillator. Comparing it with a physical spring-mass damped oscillator having...
- An inductance coil has a reactance of 100 . When an AC signal of frequency 1000 Hz is applied to the coil, the applied voltage...
- For a given series LCR circuit it is found that maximum current is drawn when value of variable capacitance is 2.5 nF. If...
- A 750 Hz, 20 V (rms) source is connected to a resistance of 100 , an inductance of 0.1803 H and a capacitance of 10 all in...
- A LCR circuit is at resonance for a capacitor C, inductance L and resistance R. Now the value of resistance is halved keeping all...
- A coil of negligible resistance is connected in series with 90 Ω resistor across 120 V, 60 Hz supply. A voltmeter reads 36 V...
- An alternating emf E = 110√2 sin 100t volt is applied to a capacitor of 2μF, the rms value of current in the circuit is ………. mA.
- An AC circuit has R = 100 , C = 2 and L = 80 mH, connected in series. The quality factor of the circuit is -
- In a series LR circuit, power of 400 W is dissipated from a source of 250 V, 50 Hz. The power factor of the circuit is 0.8. In...
- A 40 µF capacitor is connected to a 200 V, 50 Hz ac supply. The rms value of the current in the circuit is, nearly :
- A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between...
- The peak voltage of the ac source is equal to :
- A series LCR circuit with inductance 10 H, capacitance 10 , resistance 50 is connected to an ac source of voltage, V=200 (100t)...
- An inductor of 10 mH, capacitor of 0.1 μF and a resistor of 100 Ω are connected in series across an a.c power supply 220 V, 70...
- A series LCR circuit with R=20Ω, L=1.6H and C=40μF is connected to a variable frequency a.c. source. The inductive reactance at...
- An a.c. source of angular frequency ω is connected across a resistor R and a capacitor C in series. The current is observed as I....
- A LCR series circuit driven with E_rms=90 V at frequency f_d=30 Hz has resistance R=80 Ω, an inductance with inductive reactance...
Other chapters
Alcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAminesAnatomy of Flowering PlantsAncient Indian HistoryAnimal KingdomApplication of DerivativesArea Under CurveAromatic Compounds and Aryl HalidesAtomsBasic Mathematics and LogarithmBinomial TheoremBiodiversity and ConservationBiological ClassificationBiomoleculesBiotechnology and Its ApplicationsBiotechnology: Principles and ProcessesBody Fluids and CirculationBreathing and Exchange of GasesCell Cycle and Cell DivisionCell: The Unit of LifeChemical Bonding and Molecular StructureChemical Coordination and IntegrationChemical Kinetics