List of top Physics Questions on Alternating current asked in TS EAMCET

An LC circuit with negligible resistance containing a 20 mH inductor and a 50 \(\mu F\) capacitor with an initial charge of 10 mC is closed at \(t=0\). Then the minimum time taken (in \(\mu s\)) for the total energy to be shared equally between the inductor and capacitor is:

A series RC circuit has R = $\frac{125}{\sqrt{3}}\ \Omega$, C = $\frac{40}{\pi}\ \mu F$, and f = 100 Hz. Find phase difference between current and voltage.}

The quality factor of a series LCR circuit with $L=0.12 H$, $C=480$ nF and $R=25 \Omega$ connected to a 220 V variable frequency supply is

When an inductor is connected to a $200\text{ V}$ dc supply, the current through it is $5\text{ A}$ and when the same inductor is connected to a $200\text{ V}$ ac supply of angular frequency $300\text{ rad s}^{-1}$, the current through it is $4\text{ A}$. The inductance of the inductor is:

The small energy losses in transformers due to eddy currents can be reduced by

A capacitor and a resistor of resistance $100\sqrt{3}\Omega$ are connected in series to an ac source of voltage $100\sin(200t)$ V, where 't' is time in second. If the phase difference between the voltage and the current in the circuit is 30$^\circ$, then the capacitance of the capacitor is

In an LCR series circuit, if $\frac{1}{\omega C}<\omega L$, then the incorrect option among the following is ($\omega$-angular frequency, C-capacitance and L-inductance)

A 132 V ac source is connected to a pure inductor of inductance 140 mH. If the frequency of the ac source is 50 Hz, then the current passing through the inductor is

A resistor of resistance 160 $\Omega$, an inductor of 280 mH, and a capacitor are connected in series to an AC source of 80 V, 50 Hz. If the circuit is in resonance, the potential difference across the capacitor is:

An electric bulb, an open coil inductor, an ac source and a key are all connected in series to form a closed circuit. The key is closed and after some time an iron rod is inserted into the interior of the inductor, then