Question

if a 12 volt battery is connected to the arranged to resistances 10 ohm 20 ohm 25 ohm. calculate total effective resistance of arrangement and total current

Answer 1

Answer:

Are the resistance in series connection?

Explanation:

Net resistance in series = 10 + 20 + 25= 55 ohm

Emf = 12 V

Current = emf/ R = 12 /55 = 0.218 A

Net resistance in parallel, 1/R = 1/10 + 1/20 + 1/25 = (10 + 5 + 4)/ 100

R = 100/19 ohm

Current = emf/ R = 12/(100/19) = 12× 19/100 = 2.28 A