Electricity Tes...

If $${ R }_{ 1 },{ R }_{ 2 },{ R }_{ 3 }$$ are all connected in parallel, the effective resistance will be:

Two wire of same metal have same length but their cross-sections are in the ratio 3:1. They are joined in series. The resistance of thick wire is $$10\Omega$$. The total resistance of combination will be

Three equal resistors connected in series across a source of emf together dissipate $$10$$ watt. If the same resistors are connected in parallel across the same emf, then the power dissipated will be:

For a circuit shown in the figure, the total current in the circuit is:

A wire of resistance $$12\Omega$$ per metre is bent to form a complete circle of radius $$10\ cm$$. The resistance between its two diametrically opposite points $$A$$ and $$B$$ as shown in the figure is

The equivalent resistance between points $$A$$ and $$B$$ is

Calculate the potential difference between, points A and B current flowing in $$10\Omega $$ resistor in the part of the network below:-                                 

A wire of resistance R divided in 10 equal parts. These parts are connected in parallel. Then resistance equivalent is 

A metal wire of resistance R is cut into three equal pieces which are then connected side by side to form a new wire, the length of which is equal to one third of the original length. The resistance of this new wire is:-

Find the potential differences  across the $$24\Omega $$