The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagatting in vacuum is equal to

In a coil of resistance 10 $$\Omega $$, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through the coil in weber is

The instantaneous values of alternating current and voltage in a circuit are given as

$$i = {1 \over {\sqrt 2 }}$$ sin (100 $$\pi $$t) ampere

$$e = {1 \over {\sqrt 2 }}\sin \left( {100\pi t + {\pi \over 3}} \right)$$ Volt

The average power in watts consumed in the circuit is

A magnetic needle suspended parallel to a magnetic field requires $$\sqrt 3 J$$ of work to turn it through 60^o. The torque needed to maintain the needle in this position will be