List of top Physics Questions on Alternating current asked in JIPMER

In an AC circuit, the potential difference across an inductance and resistance joined in series are respectively 16 V and 20 V. The total potential difference across the circuit is

A transformer has $500$ primary turns and $10$ secondary turns. If the secondary has resistive load of $15 \,\Omega$, the currents in the primary and secondary respectively, are

A circuit is made up of a resistance $1\, \Omega$ and inductance $0.01\, H$. An alternating emf of $200\, V$ at $50\,Hz$ is connected, then the phase difference between the current and the emf in the circuit is

A coil of inductance 300 mH and resistance 2 $\Omega$ is connected to a source of voltage 2 V. The current reaches half of its steady state value in

The relation between an ac voltage source and time in $SI$ units is $V= 120\, sin(100 \,\pi t)cos(100\,\pi t) V$. The value of peak voltage and frequency will be respectively

In a step-up transformer, the turn ratio is 1 : 2. A Leclanche cell (emf = 1.5 V) is connected across the primary. The voltage developed in the secondary would be

A series resonant $LCR$ circuit has a quality factor ($Q$-factor) 0.4. If $R = 2\, k\Omega, C = 0.1 \, \mu F$, then the value of inductance is

A transformer is used to light a $100\, W$ and $110\, V$ lamp from a $220\, V$ mains. If the main current is $0.5\, A$, the efficiency of the transformer is approximately

When power is drawn from the secondary coil of the transformer, the dynamic resistance

220 V, 50 Hz AC source is connected to an inductance of 0.2 H and a resistance of 20 ohm in series. What is the current in the circuit:

Electric power is transmitted over long distances at high voltage because: