Ls 12 Pt.1 Flashcards
What happens when the circuit of a bulb is broken?
No electric current will pass through it, hence the bulb doesn’t glow.
What is a switch?
An arrangement to close or open (break) a circuit.
What is the purpose of a switch in a circuit?
To allow or stop the flow of electricity.
True or False: A bulb will glow when the safety pin is not in contact with the circuit.
False.
What are the internal parts of a torch-light?
Bulb, cells, switch, and a hollow cylindrical barrel.
Fill in the blank: The switch cuts off the flow of electricity when it is _______.
OFF
What materials are typically found in electric wires?
Conductive materials, often copper.
Why are we advised to wear rubber chappals while working with electricity?
Rubber is an insulator and prevents electric shock.
What is the role of the safety pin in the circuit activity?
To close/open the circuit.
What happens when cells are placed in a torch in a particular position?
The bulb glows only when cells are correctly positioned.
List some materials to test as conductors or insulators.
- Safety pin
- Plastic scale
- Metal bangle
- Glass bangle
- Paper clip
What is the result of inserting different objects between A and B in the circuit?
Check whether the bulb glows or not.
What happens when the lid of the torch is closed?
The circuit is completed and current flows.
How does the position of cells affect the functioning of a torch?
It determines whether the circuit is closed and the bulb glows.
Fill in the blank: The flow of electricity in a circuit is _______ when the switch is ON.
allowed
True or False: All parts of a torch-light are solid.
False.
Substances that allow electric current to pass through them
Conductors
Substances that don’t allow electric current to pass through them
Insulators
