Can you use an electric appliance rated 120v 240v in Europe without a converter?

No, you cannot use an electric appliance rated for 120V in Europe without a voltage converter, as European electrical systems typically use 230V. Plugging a 120V appliance directly into a 230V outlet can damage the appliance or create a fire hazard. However, appliances rated for dual voltage (120V/240V) can be used in Europe with the proper plug adapter. Always check the appliance's rating before use.