Veda Bites are swipeable micro-lessons — each one teaches exactly one
idea. Here's a taste from this kit; the app has the full deck.
💡 Key Idea
Electric Current: The Flow of Charge
Current is charge in motion.
Electric current is the flow of electric charge through a conductor. In metals, this charge is carried by electrons. The SI unit of current is the ampere (A). Current flows from the positive terminal to the negative terminal of a battery in a conventional circuit, but...
↳ Current is the rate of charge flow, measured in amperes.
💡 Key Idea
The Torchlight Switch Controls the Circuit
Why does the torch glow only in one switch position?
A torchlight has a lamp, a switch, and cells inside. The switch has two positions: 'on' and 'off'. When the switch is in the 'on' position, the lamp glows; when in the 'off' position, it does not...
↳ The switch controls the lamp by completing or breaking the circuit.
📖 Definition
Electric Circuit: A Closed Loop
A path for current to flow.
An electric circuit is a closed path through which electric current flows. It typically includes a source (like a battery), conducting wires, and a load (like a bulb). For current to flow, the circuit must be complete—no breaks in the path.
↳ A circuit must be closed for current to flow.