Which of the following statements correctly defines electric current?
Answer
The rate of flow of charge through a cross‑section of a conductor
The correct answer is The rate of flow of charge through a cross‑section of a conductor — Select option B as the correct definition.
Step-by-step solution
- Read each option carefully.
- Current is defined as the rate at which charge passes a point, i.e., charge per unit time.
- Option B matches this definition, while others describe different quantities.
- Select option B as the correct definition.
Common mistake: Confusing current with the speed of electrons or voltage
Concept tested: Definition of electric current
Published · How this solution was prepared and checked
Related questions
- 1 Explain the working principle of a fuse in a domestic electric circuit and describe how it protects electrical appliances from damage.
- 2 A resistor of resistance 8 Ω carries a current of 0.5 A. Calculate the potential difference across the resistor.
- 3 A heater is connected to a 240 V mains supply and draws a current of 10 A. Calculate the resistance of the heater and the electrical power it consumes.
- 4 Explain how a circuit breaker differs from a fuse in providing protection to a domestic electric circuit.
- 5 A resistor of resistance 5 Ω carries a current of 2 A. What is the potential difference across the resistor?
- 6 Write the expression for electrical power and state the unit of each quantity in the formula.