Current Electricity and Electrical InstrumentHard
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
Find potential of J with : - respect to G -...In the electric network shown, when no current flows through the 4Ω resistor in the arm EB, the potential differenc...A time varying i is speed through a resistance R as shown in figure. The total generated in the resistance is...In the given circuit, with steady current, the potential difference across the capacitor must be...Three copper worse have their lengths in the ratio 5: 3: 1 and their masses are in the ratio 1: 3: 5. Their electrical r...