Read the following text and answer the following questions on the basis of the same:
Electric Toaster : Small Industries Service Institute Takyelpat Industrial Estate Imphal has designed an Electric toaster which is operated at 220 volts A.C., single phase and available in four different rated capacity such as 600 W, 750 W, 1000 W and 1250 W. The heating element is made of nichrome 80/20 (80% nickel, 20% chromium), since Nichrome does not get oxidise readily at high temperature and have higher resistivity, so it produces more heat.
The element, is wound separately on Mica sheets and fitted with body of toaster with the help of ceramic terminals.
Insulating materials used in the device are:

Options

A. Mica
B. Ceramic
C. Mica, ceramic, Nichrome
D. Mica, ceramic

Explanation

To solve the question regarding the insulating materials used in the electric toaster, we can follow these steps:

### Step 1: Identify the Context
The question refers to an electric toaster designed by the Small Industries Service Institute in Imphal, which operates at 220 volts AC and has various rated capacities.

**Hint:** Focus on the details provided about the materials used in the toaster.

### Step 2: Read the Relevant Information
From the provided text, we learn that the heating element of the toaster is made of nichrome 80/20, which is known for its high resistivity and resistance to oxidation at high temperatures.

**Hint:** Pay attention to the materials mentioned in relation to the heating element and its insulation.

### Step 3: Identify the Insulating Materials
The text specifies that the nichrome heating element is wound on mica sheets and that ceramic terminals are used to fit the element to the body of the toaster.

**Hint:** Look for specific mentions of materials that serve to insulate the heating element from the toaster's body.

### Step 4: List the Insulating Materials
From the information gathered:
- **Mica Sheets**: The nichrome wire is wound on mica sheets, which serve as an insulator.
- **Ceramic Terminals**: These are used to connect the heating element to the toaster's body and also act as an insulator.

**Hint:** Make sure to note down all materials that are explicitly stated as insulating.

### Step 5: Conclusion
Based on the information, the two insulating materials used in the electric toaster are:
1. Mica sheets
2. Ceramic terminals

Thus, the correct answer is that the insulating materials used are mica sheets and ceramic terminals.

**Final Answer:** Mica sheets and ceramic terminals.