AIEEE 2005 Physics Question Paper Mock Test

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

The self inductance of the motor of an electric fan is $10\text{ H}$. In order to impart maximum power at $50\text{ Hz}$, it should be connected to a capacitance of:

An energy source will supply a constant current into the load if its internal resistance is:

A circuit has a resistance of $12\Omega$ and an impedance of $15\Omega$. The power factor of the circuit will be:

The phase difference between the alternating current and emf is $\pi /2$. Which of the following cannot be the constituent of the circuit?