A 24V battery having internal resistor of XΩ is connected to a 4Ω resistor, causing a current of 5A. Find out the value of X?
Circuit diagram shows that resistors 2Ω, 4Ω and RΩ connected to a battery of e.m.f. 2 V and internal resistance 3Ω. A main current of 0.25 A flows through the circuit. What is the p.d. across the 4Ω resistor?