Current Electri...

In the given figure, when key K is opened, the reading of the ammeter A will be

In the given circuit, the potential of the point E is

Three resistance P, Q R each of 2 Ω and an unknown resistance S form the four arms of a Wheatstone bridge circuit. When a resistance of 6 Ω is connected in parallel to S the bridge gets balanced. What is the value of S?

Four wires AB, BC, CD, DA of resistance 4 ohm each and a fifth wire BD of resistance 8 ohm are joined to form a rectangle ABCD of which BD is a diagonal. The effective resistance between the points A and B is

Three resistances each of 1 ohm, are joined in parallel. Three such combinations are put in series, then theresultant resistance will be

A copper wire of resistance R is cut into ten parts of equal length. Two pieces each are joined in series and then five such combinations are joined in parallel. The new combination will have a resistance

In the circuit shown the value of I in ampere is

The effective resistance across the points A and I is

A wire of resistance R is cut into ‘n’ equal parts. These parts are then connected in parallel. The equivalentresistance of the combination will be

The resistance between the terminal points A and B of the given infinitely long circuit will be