Question detail
A circuit has a current of 5 A flowing for 10 seconds. Calculate the work done by the electrical energy in the circuit if the voltage is 12 V.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
A circuit has a current of 5 A flowing for 10 seconds. Calculate the work done by the electrical energy in the circuit if the voltage is 12 V.
Answer
600 J
Explanation
This question tests the ability to apply the formula for electrical work done, which is calculated using the formula W = V × I × t. The student must understand how to manipulate the formula and substitute the correct values. This answer is linked to Energy stores and systems because it applies the learning objective: Calculate changes in energy when a system is changed by work done as current flows.. It shows the Physics relationship clearly and keeps energy, power, work done and efficiency terms distinct where they appear.
Common mistake
Common Mistake in Energy Calculation
Students often confuse the work done by current flowing with the energy transferred, leading to incorrect calculations.
Ensure to use the correct formula for calculating energy changes, specifically relating work done to the energy transferred in the system.
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