Current Electri...

A conductor of resistance $$3 \Omega$$ is stretched uniformly till its length is doubled. The wire is now bent in the form of an equilateral triangle. The effective resistance between the ends of any side of the triangle in $$\Omega$$

Current l in the network shown in figure is :-

In the situation shown, the currents through $$3\Omega$$ and $$2\Omega$$ resistances are in the ratio 

Kirchhoff's junction law is equivalent to 

Equivalent resistance between A and B is.

In the given circuit diagram , the currents , $${ I }_{ 1 }=-0.3\quad A,{ I }_{ 4 }=0.8\quad A,and\quad { I }_{ 5 }=0.4\quad A,$$ are flowing as shown . the currents $${ I }_{ 2 }$$,$${ I }_{ 3 }$$

What is the minimum resistance which can be made using five resistors each of $$\dfrac{1}{5} \Omega$$?

A particular ohmmeter uses a battery to provide a potential difference across an unknown resistance whose value resistance is to be measured. The meter measures the resulting current through this resistor and is calibrated to read out corresponding value of resistance. Suppose that this ohmmeter is used to measure he resistance of a typical incandescent tungsten-filament light bulb. The value of the resistance of the light bulb will be:

A potential gradient is created in the wire by standard cell for the comparision of emf's of two cells in a potentiometer experiment. Which possibility of the following will cause failure of the experiment. 

The magnitude and direction of current I (in A) indicated in the following circuit is