You are using a multimeter to troubleshoot a problem with a circuit. What should you do before measuring resistance?
1. Connect the device to a power source.
2. Touch the red probe to ground.
3. Touch the black probe to ground.
4. >>Disconnect the device from its power source.
Explanation : You should disconnect a device from its power source before measuring resistance. If the device is connected to the power source, the multimeter might be damaged when you attempt to measure resistance.
You should not touch the black probe to ground when measuring resistance. Resistance is measured across a circuit, so you should touch the leads to each end of the circuit you are measuring. You touch the black probe to ground when measuring voltage.
You should not touch the red probe to ground when measuring resistance. You should touch the leads to each end of the circuit you are measuring.
You should not connect the device to a power source. You must connect the device to the power source when measuring voltage, but you should not do so when measuring resistance.
Objective: Personal Computer Components
