Current Electricity and Electrical InstrumentHard

Question

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 circuit is l amp, the ewsistance of the resistor will be :
         

Options

A.14 Ω
B.16 Ω
C.28 Ω
D.7 Ω

Solution

= 1 ⇒ 20 = R + 6 ⇒ R = 14 Ω

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