Current Electricity and Electrical InstrumentHard
Question
For a particular resistance X in the figure shown the thermal power generated in ′Y′ is maximum when Y = 4Ω. Then X is:


Options
A.2Ω
B.3Ω
C.1 Ω
D.6 Ω
Solution
For maximum power req = Req ⇒ 2 +
= 4 ⇒
= 4
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
The resistance of hot tungsten filament is about 10 times the cold resistance. What will be the resistance of 100 W and ...When a resistance of 2 ohm is connected across the terminals of a cell, the current is 0.5 A. When the resistance is inc...Consider the following two statements. (A) Kirchhoff′s junction law follows from the conservation of charge (B) Ki...A better of e.m.f.20 V and internal resistance 6Ω is connected to a resister as shown in figure. If current in the c...A potentiometer circuit is set up as shown. the potential gradient, across the potentiometer wire, is k volt/cm and the ...