Current Electricity and Electrical InstrumentHard

Question

Three equal resistance each of R ohm are connected as shown in figure. A battery of 2 volts of internal resistance 0.1 ohm is connected across the circuit. Calculate the value of R for which the heat generated in the exeternal circuit is maximum.                   

Options

A.0.1 Ω
B.0.2 Ω
C.0.3 Ω
D.0.4 Ω

Solution

For Pmax     ⇒    r = Req ,    Req = R/3
0.1 = R/3     ⇒    R = 0.3 Ω

Create a free account to view solution

View Solution Free
Topic: Current Electricity and Electrical Instrument·Practice all Current Electricity and Electrical Instrument questions

More Current Electricity and Electrical Instrument Questions

At time t = 0, terminal A in the circuit shown in the figure is connected to B by a key and an alternating current I(t) ...In the standard post office box setup...P, Q is a uniform wire of resistance 2000 Ω and M the mid point of PQ. A voltmeter of resistance 1000 Ω is con...Figure shows an infinitely long wire carrying an outward current I1. The current is along Z axis. There is a curved wire...Two bulbs rated (25Ω - 220Ω) and (100Ω - 220Ω) are connected in series to a 440V line. Which one is ...