Two resistors of resistance 5Ω and 15Ω are connected in parallel to a 15 volt battery. Find the current across 5Ω resistor.
3A
1A
4A
2A
Potential across 5Ω is 15 volts
So using ohm’s law
V = IR
15 = I*5
I = 3A
Two resistors of resistor 2Ω and 5Ω are connected in series with a 7V battery. Find the potential difference across the 5Ω resistor.