Fill in the following blanks with suitable words :
The safety device based on the heating effect of electric current is called _________.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a safety device that operates on the heating effect of electric current.

2. **Identifying the Concept**: The heating effect of electric current refers to the phenomenon where electric current passing through a conductor generates heat. This effect is utilized in various electrical devices for safety.

3. **Recalling Relevant Devices**: One of the most common safety devices that uses the heating effect of electric current is a fuse.

4. **Explaining the Function of a Fuse**: A fuse consists of a metal wire that has a low melting point. When excessive current flows through the fuse, the wire heats up due to the heating effect and eventually melts. This breaks the circuit and prevents further current from flowing, thereby protecting electrical appliances from damage.

5. **Filling in the Blank**: Based on the above understanding, we can fill in the blank in the question: "The safety device based on the heating effect of electric current is called **fuse**."

**Final Answer**: The safety device based on the heating effect of electric current is called **fuse**.

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