Electricity Tes...

If you are provided three resistances $$2 \Omega, 3 \Omega$$ and $$6 \Omega$$. How will you connect them so as to obtain the equivalent resistance of $$4\Omega$$

A nichrome wire $$50\ cm$$ long and one square millimeter cross-section carries a current of $$4A$$ when connected to a $$2V$$ battery. The resistivity of nichrome wire in ohm meter is

The resistors of resistances $$2\ \Omega, 4\ \Omega$$ and $$8\ \Omega$$ are connected in parallel, then the equivalent resistance of the combination will be:

There are $$n$$ similar conductor each of resistance $$R$$. The resultant resistance comes out to be $$x$$ when connected in parallel. If they are connected in series, the resistance comes out to be

Two bulbs, one of 50 watt and another of 25 watt are connected in series to the mains. The ratio of the currents through them is

An electric iron draws 5 amp, a TV set draws 3 amp and refrigerator drawn 2 amp from a 220 volt main line. The three appliances are connected in parallel. If all the three are operating at the same time, The fuse may be of

Two bulbs of $$100 W$$ and $$200 W$$ working at $$220$$ volt are joined in series with 220 volt supply. Total power consumed wll be approximately.

If a high power heater is connected to electric mains then the bulbs in the house become dim, becuase there is a 

A $$60 \ Watt$$ bulb operates on $$220 \ V$$ supply. The current flowing through the bulb is

Electric radiator which operates at 225 volts has resistance of 50 ohms. Power of the radiator is approximately