Based on what you have seen, what must be true for a circuit to light a bulb? There has to be a lightbulb and conductor (wires). There has to be an energy source (a battery). … Conductors are materials with easily moveable charges, allowing current to occur.
How does a bulb light up in a circuit?
When a light bulb connects to an electrical power supply, an electrical current flows from one metal contact to the other. As the current travels through the wires and the filament, the filament heats up to the point where it begins to emit photons, which are small packets of visible light.
Why do we need a complete circuit for the bulb to light?
A wire must then connect the other part of the bulb to the positive terminal of the cell.
|Charge Flow: No Explanation: The switch is in the open position, so there is no closed conducting loop.||Charge Flow: No Explanation: There is no closed conducting loop from + to – terminal.|
What are the two requirements for an electric circuit?
There must be an energy source (battery) capable of doing work on charge to move it from a low energy location to a high energy location. This establishes a potential between the two ends of an electric circuit. 2. There must be a closed conducting loop that connects from the high potential to the low potential.
In which circuit will the bulb light up?
When the wires in the circuit are connected to the metal casing and metal tip of the bulb, there is a closed (or complete) circuit with the bulb. Electricity will be able to flow through the filament, causing the bulb to light up.
What will be the condition of the bulb?
(i) There should be an electrical source, i.e., one or more electric cells connected to a circuit. (ii) There should not be any gaps or discontinuity in the wires connected to the circuit. (iii) The switch connected to the circuit should be kept closed.