phy - Electric currents and it's affect Flashcards
What is electric current ?
Current is the flow of electricity through a conductor
What happens if we handle electric current carelessly ?
U might get burned or die
What is current ?
It is the flow of charged particles called “electrons” in a conductor
What is a circuit ?
I t is a continuous conducting path between the two terminals of a cell or battery along which an electric current flows
What are the different reasons a bulb does not glow ?
- Because the is no electricity
- because the bulb is fused
- because there is a lose connection
What is a circuit diagram ?
It is a diagram which tells us how the various components in a circuit are connected by using the electric symbols
What is the proper way of keeping two batteries together ?
You have to make sure the second batterie positive side is touching the negative side of the first batterie
What are the three effects electric current can produce ?
- Heating effect
- Magnetic affect
- Chemical effect
What is resistance ?
It is the degree of which a material opposes the passage of current through itself
What is the heating effect of current?
it is when an electric current is passed through high resistance wire, the resistance wire becomes hot and produces heat
What happens if the magnitude of current is great ?
The heat will also be great
Which part of the lightbulb produces heat and light, and what is it made up of ?
The part which heats up to give light is the filament and it is made up of tungsten
what is a fuse ?
it is a safety device which prevents electrical fires and damage to electrical appliances due to the excessive flow of current
What is the magnetic effect on current ?
it is when electric current passes through a wire, the current- carrying wire behaves like a magnet
What is an electromagnet ?
Is the magnet made by using electric current
