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3. The load across a 50.0-V battery consists of a series combination of two lamps with resistances of 125 ( Wand 225 Q. a. Find the total resistance of the circuit. b. Find the current in the circuit. c. Find the potential difference across the 125-0 Wamp. 4. The load across a 40-V battery consists of a series combination of three resistances RI, Ra, and R3. R1 is 240 0 Mand R3 is 120 Q. The potential difference across Ri is 24 V. a. Find the current in the circuit. b. Find the equivalent resistance of the circuit. c. Find the resistance of R2. 5. The load across a 12-V battery consists of a series combination of three resistances RI, Ra, and R3. R1 is 210 0, R2 is 350 0, and Rs is 120 Q. a. Find the equivalent resistance of the circuit. b. Find the current in the circuit. c. Find the potential difference across R3. 6. Two resistances, one 12 0 Mand the other 18 0, are connected in parallel. What is the equivalent resistance of the parallel combination