Connecting sources and resistors
Answers are for parents and teachers.
1
Five 1.2 V rechargeable cells are in series. The battery voltage in V?
6
2
100 Ω and 400 Ω in parallel. Total resistance in ohms?
80
3
6 V is applied to 120 Ω and 180 Ω in series. The current in mA?
20
4
Write in 3 steps how to measure a battery’s voltage with a multimeter.
Set DCV mode; touch the red lead to “+” and the black to “–”; read the display.
5
Why does connecting cells in series give a higher voltage?
Each cell adds its own push to the charges, so the voltages add.