What is an electric tester used to measure?

A fuse is an equipment to prevent home circuits from_____?

In a home circuit, there are three wires, hot wire, ground wire and ______?

In a home circuit, a(n) ________ follows the lead-in wire to measure how much energy has been consumed by this residential or business.

How many metal rods does an electrial tester have?

Look at the socket. The upper pin is connected to ________.

Look at the socket. The left pin is connected to ________.

Look at the socket. The right pin is connected to ________.

If you are standing on the ground and one part of your body is touching ________, you will experience a single-line electric shock, which is extremely dangerous.