The other side of the switch is attached to the positive terminal on the battery.

The holes in the P-type silicon are repelled by the positive terminal.

The Voltmeter is placed in parallel between the positive and negative terminals of the battery.

The negative electrons in the N-type silicon get attracted to the positive terminal of the battery.

The corona wire is usually, but not necessarily, connected to the positive terminal of the high voltage power supply.

Now, hold the black lead to the negative terminal of the battery and the red lead to the positive terminal.

Category 3: Cylindrical cells with flat positive and negative terminals.

The cell casing is in connection with the positive terminal.

When there is a path that goes from the negative to the positive terminal, you have a circuit, and electrons can flow through the wire.

Attach one exposed end of wire to the positive terminal of the battery.