What this chapter is about
When charges move, they constitute electric current. Current flows through the copper wire connecting your battery to a lightbulb. Current flows from the generator through power lines to your home. Current flows through semiconductor transistors in your phone. Understanding current—how it flows, what determines its magnitude, how it behaves in different materials, and how it delivers energy—is essential for understanding electrical devices and power systems.
Unlike the static charges we studied in previous chapters, this chapter focuses on charges in motion. We'll explore:
Learning objectives
- 1Explain charge Flow, Resistance, Electrical Power, and Circuit Behavior
- 2Explain eLECTRIC CURRENT
- 3Explain definition of Current
- 4Explain types of Current
- 5Explain current Density
- 6Explain rESISTANCE AND OHM'S LAW
Your learning path
Key terms
electric currentOhm's lawResistanceSuperconductivityv_dEMFFusesType IType IIVoltageOhms (Ω)CircuitsChargingVolts (V)Power (P)Frequency
Connected chapters
42Concepts
34Formulae
11Minutes