Nae Queen! Nae Laird! Nae Master!
I willna' be fooled again!
Tuesday, October 26, 2010
Making brains sprain, and doing so joyfully...
Challenged students today: Measuring resistance of a headlight bulb filament, it shows 0.4 Ohms. Given a 12 volt power supply, Ohms law states the resultant current draw will be 30 amps, yet many vehicles protect the headlight circuit with a 10 amp fuse.