Alternating Cur...

A broadcasting centre broadcasts at 300 metre band. A capacitor of capacitance 2.5$$\mu$$F is available. The value of the inductance required for resonant circuit is nearly

If in a series L-C-R ac circuit, the voltages across L, C and R are $$V_1, V_2$$ and $$V_3$$ respectively, then the voltage of the source is always

An ac source producing emf  $$\displaystyle e = E_0[cos  (100 \pi t) + cos (500 \pi t)]$$ is connected in series with a capacitor and a resistor. The steady state current in the circuit is found to be $$\displaystyle i = I_1  cos  (100 \pi t + \varphi_1) + I_2  cos  (500 \pi t + \varphi_2)$$

In an electric circuit the applied alternating emf is given by $$\displaystyle E = 100\sin(314t) $$ volts and current flowing $$\displaystyle  I =  \sin  \left(314t + \dfrac{\pi}{3}\right)$$, Then, the impedance of the circuit is $$(in\ \Omega)$$

An $$AC$$ voltmeter in an $$L-C-R$$ circuit reads 30 volt across resistance, 80 volt across inductance and 40 volt across capacitance. The value of applied voltage will be

A coil of 10 mH and 10 $$\Omega$$ resistance is connected in parallel to a capacitance of $$0.1 \mu F$$. The impedance of the

The reactance of a condenser of capacity 50 $$\mu$$F for an $$AC$$ of frequency $$2 \times 10^3$$ Hertz will be

The capacitive reactance of a condenser of capacity 25$$\mu$$F for an AC of frequency 4000 Hz will be

In the figure two identical bulbs, each with filament resistance $$100\ \Omega$$ are connected to a resistor $$R = 100\ \Omega$$, and an inductor $$\displaystyle (X_L = 100 \Omega)$$ as shown in the Figure. Then, which bulb glows more

In an ac circuit, the resistance of R $$\Omega$$ is connected in series with an inductance $$I$$. If phase angle between voltage and current be $$\displaystyle 45^{\circ}$$, the value of inductive reactance will be: