Advertisements
Advertisements
प्रश्न
An electric current in an LC – circuit at resonance is called - ______
विकल्प
The wattless current
The displacement current
The idle current
The apparent current
उत्तर
An electric current in an LC – circuit at resonance is called - The wattless current.
APPEARS IN
संबंधित प्रश्न
Choose the correct option.
In a circuit L, C and R are connected in series with an alternating voltage of frequency f. the current leads the voltage by 45°. The value of C is ______.
An electric lamp is connected in series with a capacitor and an AC source is glowing with a certain brightness. How does the brightness of the lamp change on increasing the capacitance?
If AC voltage is applied to a pure capacitor, then the voltage across the capacitor ______
An electric bulb operates 10 V d.c. If this bulb is connected to an a.c. source and gives normal brightness, then the peak value of the source is ______
A coil of resistance 300Ω and inductance 1.0 H is connected across an alternating voltage of frequency `300/(2pi)` Hz, therefore phase difference between the voltage and current in the circuit is ______
Define capacitive reactance.
State the equation for impedance Z in an A.C. circuit.
If the peak value of an alternating emf is 15V, what is its mean value over half cycle?
Explain term impedance and state the formula for it in the case of an LCR series circuit.
A series LCR circuit has resistance 10Ω and reactance is `7sqrt2` Ω. What is the impedance of the circuit?
Find the current in a circuit consisting of a coil and a capacitor in series with an A.C source of 110V (r.m.s.), 60Hz. The inductance of a coil is 0.80 H and its resistance is 50Ω. The capacitance of a capacitor is 8µF.
A 0.5µF capacitor is discharged through a 10 millihenry inductor. Find the frequency of discharge.
Explain the term inductive reactance. State its unit and dimensions.
Obtain the expression for the applied emf and the effective resistance of the circuit when alternating emf is applied to an LR circuit.
Obtain the expression for the applied emf and the effective resistance of the circuit when alternating emf is applied to a CR circuit.
The standard voltage of A.C. mains in India is ______
For circuit shown in figure IE = 4 mA, IB = 40 µA. What are the values of ex, and le respectively?
In amplitude modulation. the amplitude of carrier wave is Ac and that of the modulating signal is Am· In practice, the ratio of Am to Ac is kept less than or equal to one, to avoid ______.
An RC Circuit as shown in the figure is driven by a AC source generating a square wave. The output wave pattern monitored by CRO would look close to:
A telegraph line of length 100 km has a capacity of 0.01 µF/ km and it carries an alternating current at 0.5 kilo cycle per second. If minimum impedance is required, then the value of the inductance that needs to be introduced in series is ______ mH. (if π = `sqrt10`)
