Allied & ICAR Exam Bank • ALLIED_1142 NAT • 2 Marks

Section 3: Farm Power

Farm Power

Subtopic: Tractor Battery

Question Statement:

A 12-volt lead-acid tractor battery has a rated capacity of 90 Ampere-hours (Ah). The total electrical energy stored in the fully charged battery in kilo-Joules (kJ) is:

Answer Key:

3888

Step-by-Step Solution & Explanation

Energy $= V \times I \times t = 12\text{ V} \times 90\text{ A}\cdot\text{h} = 1080\text{ Watt-hours}$. Since $1\text{ Wh} = 3600\text{ J}$: Energy $= 1080 \times 3.6\text{ kJ} = 3888\text{ kJ}$.
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