Topic 4-6 Flashcards
What’s an electrode?
The metals at the end of the battery. (Must be different in order to work)
What’s an electrolyte?
It’s the substance that is in between the two metal electrodes
What’s a primary cell?
A cell that can’t be recharged
What’s a secondary cell?
A cell that can be recharged
What’s a wet cell?
Cell with a liquid electrolyte
What’s a dry cell?
A cell with a paste, plastic or ceramic solid electrolyte
What has more voltage:
3 cells connected in parallel or
3 cells connected in series ?
3 cells connected in series. They work together (in a way)
What’s a generator ?
It converts -
magnetism (motion) to electricity
What’s a DC generator ?
A DC generator is a generator that has a split ring commutator and only produces electricity in one way. It produces electricity by using a magnet and a copper wire
What’s an AC generator?
An AC generator, goes in 2 directions and and uses a slip ring commutator. It produces electricity by using magnets and copper wire
What’s a motor?
A motor converts:
Electricity to magnetism (motion)
What’s a DC motor?
It uses an armature (what the copper wire is on and it spins in the magnet) , a commutator (where the ring is that spins the armature) and a permanent magnet (magnet + copper) to create motion.
Usually used in small appliances
What’s an AC motor?
An AC motor uses a stator and rotor (toilet bowl washer in the toilet bowl washer holder) usually used in larger appliances
What’s an electromagnet?
An electromagnet is when a iron core is inserted in between copper wire with an electric charge and creates a magnet .
What is an electrochemical cell?
It contain electrodes and electrolytes
Name 6 ways electricity can be transferred
- Electricity to heat
- Heat to electricity
- Electricity to motion
- Motion to electricity
- Electricity to light
- light to electricity
Sorry for the double one
What are thermocouples ?
Thermocouples are decided that convert heat to electricity by heating up metal that sends out electricity
What’s the piezoelectric effect?
This is when current is passed through a crystal creating a vibration or sound
Ex. Those talking cards
(Motion - electricity )
Explain the piezoelectric crystal in reverse
That’s when you compress the crystal to create a vibration that then sends electricity out
Ex. A BBQ lighter
(Motion to electricity )
Explain how electricity can be turned into lights + give examples
The electricity travels through a resistor which then gets really hot creating a glow to form light :)
Ex. Incase cent bulbs and LED lights
What’s a photovoltaic cell?
A photovoltaic cell takes light and breaks it down and turns it into electricity
Ex. Solar panels and calculators
(Light to electricity )
What’s an electrochemical cell?
A battery that works because of w chemical reaction causing electricity
