Name the instrument used to measure (i) electric current in a circuit, (ii) potential difference between two points in a circuit.

Explanation

To answer the question, we need to identify the instruments used for measuring electric current and potential difference in a circuit.

### Step-by-Step Solution:

1. **Identify the Instrument for Electric Current:**
- The instrument used to measure electric current in a circuit is called an **Ammeter**.
- An ammeter is connected in series with the circuit to measure the current flowing through it.

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