posted by queen .
the headlamp and 2 identical tail lamp are conected in paralel to batery with unknown internal resistancs.headlamp resistance wth 2.4 ohm controld by switch s1.the tail lamps are controled by s2.the resistance of the connection wired may be ignored. questions:1.determine the emf of battery. 2.with switch s1 closed,calculate:current through the headlamp.3.internal resistance,r,of the battery.4.both switch are closed.the battery delivers a current of 6A during this period.calculate the resistance of each tail lamp
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