1. **Problem Statement:** You want to learn how to solve ammeter questions, which typically involve finding current, voltage, or resistance in electrical circuits using ammeters. 2. **Key Formula:** The basic formula used is Ohm's Law: $$I = \frac{V}{R}$$ where $I$ is current, $V$ is voltage, and $R$ is resistance. 3. **Important Rules:** - An ammeter is connected in series to measure current. - It ideally has very low resistance to avoid affecting the circuit. - Use Kirchhoff's laws for complex circuits. 4. **Step-by-step approach:** - Identify the circuit configuration and where the ammeter is connected. - Use Ohm's Law to relate voltage, current, and resistance. - Apply Kirchhoff's Voltage Law (sum of voltages in a loop is zero) and Kirchhoff's Current Law (sum of currents at a junction is zero) if needed. - Calculate the current flowing through the ammeter using these laws. 5. **Example:** If a resistor of $10\ \Omega$ is connected to a $20$ volt battery and an ammeter is in series, current is $$I = \frac{20}{10} = 2\ \text{amperes}$$. This is the current the ammeter will read. Final answer: Use Ohm's Law and Kirchhoff's laws to find the current through the ammeter in the circuit.