To determine which of the following objects is an insulator, we can follow these steps:
### Step 1: Understand the Definitions
- **Insulator**: A material that does not allow electricity to pass through it. Examples include rubber, plastic, and glass.
- **Conductor**: A material that allows electricity to flow through it easily. Examples include metals like copper, aluminum, and iron.
### Step 2: Analyze Each Object
- **Iron Rod**: This is a metal and conducts electricity. Therefore, it is not an insulator.
- **Plastic Cup**: Plastic is a non-metal and does not conduct electricity. This is a potential insulator.
- **Nickel Coin**: Nickel is a metal and conducts electricity. Therefore, it is not an insulator.
- **Steel Spoon**: Steel is also a metal and conducts electricity. Therefore, it is not an insulator.
### Step 3: Identify the Insulator
From the analysis:
- The only object that does not conduct electricity is the **Plastic Cup**.
### Final Answer
The object that is an insulator is the **Plastic Cup**.
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To determine which of the following objects is an insulator, we can follow these steps:
### Step 1: Understand the Definitions
- **Insulator**: A material that does not allow electricity to pass through it. Examples include rubber, plastic, and glass.
- **Conductor**: A material that allows electricity to flow through it easily. Examples include metals like copper, aluminum, and iron.
### Step 2: Analyze Each Object
- **Iron Rod**: This is a metal and conducts electricity. Therefore, it is not an insulator.
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