Question

My physics class is working on Ohm's law and we did a lab about series and parallel circuits. While doing the lab report I got stuck on this question below. Please help!

"For the same amount voltage, when do we have more current flowing from/to the voltage source? When resistors are connected in series or when they are connected in parallel?"

This is my data:

Part I

Voltage (V)	Current (A)	Resistance (Ω) R = V/I	% diff.
33	0.33A	100	0
45	0.45A	100	0
60	0.60A	100	0
75	0.75A	100	0
90	0.90A	100	0
120	1.20A	100	0

Part II

Voltage (V)	Current (A)	Resistance (Ω) R = V/I	% diff.
33	0.12A	275	5%
45	0.17A	264.7	5.3%
60	0.22A	272.7	2.7%
75	0.28A	267.8	2.2%
90	0.33A	272.7	2.7%
120	0.44A	272.7	2.7%

Part III:

Voltage (V)	Current (A)	Resistance (Ω) R =V/I	% diff.
33	1.11A	29.7	2.3%
45	1.51A	29.8	2.2%
60	2.02A	29.7	2.3%
75	2.52A	29.7	2.3%
90	3.02A	29.8	2.2%
120	4.03A	29.7	2.3%

Answer 1

If resistors are connected in series the voltage will drop across the series connected resistors.Here voltage is different for each type of resistor.But the current through the series connected resistors is same.so if you have to find out voltage across each resistor we can use ohms law.

V=IR.

If resistors are connected in parallel then the voltage drop across each resistor is same.But current is different in each resistor.Here also we can use ohms law for calculating voltage and current.