Aim:

To learn how to check a circuit using a digital multimeter.

Requirements:

• Digital multimeter

• Simple LED circuit (battery, switch, LED, wires)

• Safety gloves (optional for beginners)

Working:

Step 1: Continuity Test of the Multimeter

• Turn the multimeter dial to continuity mode (diode/beep symbol).

• Touch the red and black probes together.

• You should hear a beep or see a small reading – this confirms the meter is working.

Step 2: Check Wire Connections

• Place probes on two ends of a wire or joint.

• If connected properly → beep sound.

• If broken → no beep.

Step 3: Test the Battery Voltage

• Switch dial to DC Voltage (V— symbol).

• Place red probe on + terminal, black probe on – terminal of the battery.

• The display should show ~1.5V (for AA battery) or 9V (for 9V battery).

Step 4: Check the LED Circuit

• With switch ON, measure voltage across the LED.

• If voltage is correct (~2V for red LED), LED should glow.

If not, check continuity to find the fault.