Electricity - Current, Potential Difference and Resistance

Question 1

When resistors are in series what happens to current, potential difference and resistance?

Answer 1

Current: I(supply)=I1=I2=I3
Voltage: V(supply)=V1+V2+V3
Resistance: R(supply)=R1+R2+R3

Question 2

When resistors are in parallel what happens to current, potential difference, and resistance?

Answer 2

Current: I(supply)=I1+I2+I3
Voltage: V(supply)=V1=V2=V3
Resistance : 1/R(total)=1/R1+1/R2+1/R3

Question 3

What are voltage dividers used for?

Answer 3

Use 2 resistors in series to split the voltage in the ratio of resistors