The voltage across the external 2 Ω load when the battery delivers 10 A is:

The voltage across the external 2 Ω load when the battery delivers 10 A is:

• A. 20 V
• B. 25.2 V
• C. 10 V
• D. 5 V

Answer: (A)

Voltage across a component follows Ohm’s law: V = I × R. The external load has a resistance of 2 Ω and carries 10 A. Multiply to get the voltage drop across it: 10 A × 2 Ω = 20 V. So the voltage across the external load is 20 V. Even if there’s internal resistance in the battery, the drop across the 2 Ω load depends only on the current through it and its resistance, which here gives 20 V. The other numbers would require different current or resistance, which isn’t given.

Voltage across a component follows Ohm’s law: V = I × R. The external load has a resistance of 2 Ω and carries 10 A. Multiply to get the voltage drop across it: 10 A × 2 Ω = 20 V. So the voltage across the external load is 20 V. Even if there’s internal resistance in the battery, the drop across the 2 Ω load depends only on the current through it and its resistance, which here gives 20 V. The other numbers would require different current or resistance, which isn’t given.