Calculating Charge Flow in a Circuit

Introduction

• Objective: Ability to calculate the charge flow in a circuit.
• Recent topics: Electric current, series, and parallel circuits.

Key Concepts

Electric Charge

• Measured in coulombs (C).
• A current of 1 ampere equals 1 coulomb of charge flowing per second.
• Electric Current: Rate of flow of electric charge.

Calculating Charge Flow

• Equation: ( \text{Charge flow (C)} = \text{Current (A)} \times \text{Time (s)} )
• Note: This equation is not provided in exams; must be memorized.

Example Problem 1

• Given:
  • Current: 0.3 amperes
  • Time: 20 seconds
• Solution:
  • Using equation: ( \text{Charge flow} = 0.3 \times 20 )
  • Result: Charge flow = 6 coulombs

Example Problem 2

• Given:
  • Charge flow: 360 coulombs
  • Time: 400 seconds
• Find: Current
• Steps:
  • Rearrange the equation: ( \text{Current (A)} = \frac{\text{Charge flow (C)}}{\text{Time (s)}} )
  • Using values: ( \text{Current} = \frac{360}{400} )
  • Result: Current = 0.9 amperes

Additional Resources

• More practice problems available in the revision workbook.

Conclusion

• By understanding these concepts and practicing, you should be able to calculate charge flow in circuits confidently.