Current Electricity and Electrical InstrumentMedium
Question
The effective resistance between points P and Q of the electrical circuit shown in the figure is
Options
A.
B.
C.2r + 4R
D.
+ 2r
+ 2rSolution
The circuit is symmetrical about axis POQ. Therefore the equivalent circuit is drawn
⇒ RPQ =
If a poential difference is applied across P and Q, there will be no currents in arms AO and OB. So these resistance will be ineffective
⇒ RPQ =
If a poential difference is applied across P and Q, there will be no currents in arms AO and OB. So these resistance will be ineffective
Create a free account to view solution
View Solution FreeTopic: Current Electricity and Electrical Instrument·Practice all Current Electricity and Electrical Instrument questions
More Current Electricity and Electrical Instrument Questions
In the circuit diagram each resistor of resistance 5Ω. The points A and B are connected to the terminals of a cell ...Resistance of an ideal voltmeter is :...Two identical batteries, each of emf 2V and internal resistance r = 1Ω are connected as shown. The maximum powe...A conducting square frame of side ′a′ and a long straight wire carrying current I are located in the same pl...A potential divider is used to give outputs of 2V and 3V from a 5Vsource, as shown in figure. which combination of resis...