During a thunderstorm which of the following actions might not be a safe practice?
Using Telephone having cord
Switching on / off electric lights
None of the above
Thunder and lightning usually occur at the same time, light travels faster than sound so lightning is seen before thunder can be heard. Thunder is the rumbling sound that is heard during thunderstorms.
Lightning and thunderstrom can strike telephone cords, electrical wires and metal pipes, therefore contact with these should be avoided. Bathing should be avoided during thunderstorms to avoid contact with running water.
Electrical appliances such as computers, TVs, etc. should be unplugged.
It is safe to use mobile phones and cordless phones.