In an L-C-R circuit, capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be..
A 50 V AC is applied across an R-C (series) network. The rms voltage across the resistance is 40 V, then the potential across the ..
The maximum value of AC voltage in a circuit is 707 V. Its rms value is
The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is
The peak value of an alternating current is 5 A and its frequency is 60 Hz. Find its rms value and time taken to reach the peak va..
The maximum voltage in DC circuit is 282V.The effective voltage in AC circuit will be
In an L-C-R series AC circuit, the voltage across each of the components L, C and R is 50 V. The voltage across the L-C combinatio..
An inductance 1 H is connected in series with an AC source of 220 V and 50 Hz. The inductive reactance (in ohm) is
A telephone wire of length 200 km has a capacitance of 0.014 uF per km. If it carries an AC frequency 5 kHz, what should be the va..
Same current is flowing in two alternating circuits. The first circuit contains only inductance and the other contains only a capa..
A pure inductive coil of 30 mH is connected to an AC source of 220 V, 50 Hz. The rms current in the coil is
In an AC circuit, the current lags behind the voltage by pie/3. The components of the circuit are
An ideal choke draws a current of 8 A when connected to an AC supply of 100 V, 50 Hz. A pure resistor draws a current of 10 A when..
A hot wire ammeter reads 10 A in an AC circuit. The peak value of the current will be
Average power in the L - Câ€“R circuit depends upon the
In a circuit, the current lags behind the voltage by a phase difference of pie/ 2, the circuit will contains which of the followin..
In an a.c. circuit the instantaneous e.m.f. and current
In Colpitt oscillator the feedback network consists of
Alternating current cannot be measured by DC ammeter because
What is the average value of the AC voltage over one complete cycle?
A choke is preferred to a resistance for limiting current in AC circuit, because
In L-C-R circuit if resistance increases, quality factor
If an alternating voltage is represented as E= 141 sin (628 t), then the rms value of the voltage and the frequency are respective..
An LCR circuit is equivalent to a demand pendulum
An arc lamp requires a direct current of 10 A
For an RLC circuit driven with voltage of amptitude
In a series LCR circuit R=200 ohm and the voltage
In the LCR circuit as shown below both switches
A fully charged capacitor C with initial charge
The current voltage relation of diode is given by I = (e^l000V/T - 1) mA, where the applied voltage V is in volt and the temperatu..
Alternative emf of E = 220 root 2 sin 100 t is applied on a capacitor 1 u then current is
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