A transformer which can produce 8V from a 240v a.c. supply, has an efficiency of 80%. If the current in the secondary coil is 15A, calculate the current in ...

In the AC circuit diagram above, the resonance frequency is

Electricity is supplied to a school along a cable of total resistance \(0.5\,\Omega\) with the maximum current drawn from the mains as \(100\text{ A}\). The ...

A body on the ground is acted on by a force of 10N at a point P as shown in the fig above. What force is needed to stop the body from moving eastwards

A parallel plate capacitor has a common plate area of \(5 \times 10^{-8}\,\mathrm{m}^2\) and plate separation of \(2 \times 10^3\,\mathrm{m}\), Assuming free...

The total resistance measured at PQ in the diagram above is

In photoelectric effect, electrons will leave the metal surface when illuminated by light of appropriate frequency if the photon energy is

The iron core of an induction coil is made from bundles of wire so as to

In a nuclear fusion experiment, the loss of mass amounts to 1.0 x 10-6kg. The amount of energy obtained from the fusion is