Electronics - Voltage and Current - Discussion

Multimeter is the electronic device so used many of the electronic circuit.

Multimeteris a electronic devices. Multimeter measured current, voltage, resistance, transistor resistance.

Multimeter: Measures voltage, current, resistance and checks the continuity of problems!

Multimeter it can measure more than one parameter at a time based on the selection and probe connection.

1. Ohm.
2. Continuity (Buzzer sound when it is closed).
3. Diode check.
4. Current (milli amps to AMPs) AC and DC.
5. Voltage (milli volt to volt) AC and DC.

I said that it only measures voltage, because actually that is the only thing which CAN be measured by a digital multimeter.

When you select "OHMS" on a multimeter, voltage is measured by passing a constant current source through the resistor and measuring the VOLTAGE across the resistor. A microprocessor then calculates resistance using ohm's law, R=V/I.

When you select "CURRENT" on a multimeter, voltage is measured across a shunt resistor in series with the load, and then the microprocessor calculates current using ohm's law, I=V/R.

Hence one can argue that a multimeter only measures voltage, but rather calculates resistance and current also.

Multimeter is a device which measure Voltage, current, Power etc.