1.

A battery of 20 cells (each having e.m.f 1.8Vand internal resistance 0.1ohm) is chargedby 220 volts and the charging current is 15A.The resistance to be put in the circuit isQ.29) 10.27 ohnm(C) 8.62 ohms(B) 12.27 ohm(D) 16.24 ohms

Answer»

Using Kirchoff'sVoltage Law the following eqn results220 = 20x1.8 + 15x20x0.1 + 15xR (where R is the external resistance required)or 15R = 220 - 36 -30.or 15R = 154or R = 10.3 ohms.



Discussion

No Comment Found

Related InterviewSolutions