Show:
static electricity
current electricity
batteries
circuits
electronics
100
what is static electricity?
what is the buildup of electric charges on the surface of objects.
100
What does electrons produce?
What is electricity
100
Device that converts chemical energy to electrical energy.
What is electrolytic cell
100
Device that limits the amount of electrical current flowing through a circuit,
What is fuse.
100
Small sandwich of two different types of semiconductors.
What is transistor
200
Which charges attract and which charges repel?
What is like charges repel and opposite charges attract.
200
Two main types of electric current
What is alternating currents and direct currents
200
Difference between wet cell and dry cell.
Wet cell contains a liquid electrolyte, which is free to flow and move. Dry cells use a combination of thick, paste-like chemicals for the electrolyte.
200
Description of parallel and series circuit.
What is the electric current flows in a single path for series circuit. Parallel circuit is that the circuit is broken into several branches so the current flows into multiple paths.
200
What is a diode used for.
To convert AC power to DC power.
300
why does some electrical prongs have three prongs?
What is it lets electrons get to and from the ground faster.
300
Much of the electricity that is transported through power grids come from _____ ______.
What is power plants.
300
Difficulties in getting rid of batteries.
The harmful metals can leak out and pollute land and water resources. Burning batteries causes air pollution.
300
The three main parts to a circuit.
What is the power source, a load or electronic device that uses current, and a conductor or wire.
300
What are the four different types of semiconductor devices?
What is diodes, solar cells, photocells, and transistors.
400
what is the Van de Graaff generator and what does it do?
It produces a static charge. Touching the aluminum globe causes all the strand of a person's hair to repel one another.
400
Define amperage, voltage, and ampere.
What is amperage is the rate at which electron flow through the wire in a given period. Voltage is what drives the elctrons through the wire. The unit for measuring the flow of electric current is the ampere.
400
Advantages and disadvantages of a single-use battery and rechargeable battery. (two answers for each)
Single-use batteries advantages: less expensive first cost, ready to use, dependable amount of charge, and less likely to explode or start a fire. disadvantages of Single-use batteries: need to keep buying, produce more waste, and contain toxic chemicals. Advantages of rechargeable batteries: long-term cost savings, produce less waste, less toxic than Single-use batteries. rechargeable batteries disadvantages: must wait for charging, lose ability to hold a charge over time, more likely to explode or start a fire.
400
what the advantage of circuit breaker?
They can be reset instead of replaced.
400
What is diodes, solar cells, and photocells used for?
Diodes are used to convert AC power to DC power.Solar cells are electronic devices that change solar radiation from the sun directly into electricity. Photocells are used to generate or control an electric current in such devices as burglar alarms and smoke detectors.
500
Explain how pollution can be controlled in a smoke stack.
dirt and smoke particles move through a smoke stack. The particles pass through a negatively charged metal plate and receive a negative charge. The charged particles are attracted to positively charged collecting plates. Collecting plates are knocked to remove the dirt and smoke particles. Clean waste gas continues through the smoke stack.
500
What things did the scientist George Ohm discover?
Shorter or thicker wires provide less resistance to charge flow. Resistance is related to the kind of material the charge flows through.
500
What do recycling centers do with the used batteries?
what is separate the batteries by chemicals in the electrolyte. After combustible material is removed, the cells are chopped into smaller pieces and the metal is heated until it melts. Some recyclers ship the solid metal in large masses to metal recovery plants for reuse in new products.
500
What are six electrical safety rule to prevent burns and shocks?
Never touch electrical outlets with your fingers or object. Never play with electrical cords, wires, or switches. If you are in the bathtub, shower, or standing on a wet floor, never touch anything electrical such as a light switch or hair dryer. When playing outdoors, never play around electrical wires or equipment. stay away from areas marked DANGER: HIGH VOLTAGE. Never climb utility poles, transmission towers, or fences around substations. Do not climb trees near power lines. Never throw objects at wires or utility poles. Only fly kites in dry weather and in open spaces, away from power lines.
500
What is a smart Home?
Everything in your home is controlled by your smartphone.