Show:
ELECTRICITY
MAGNETISM
RADIOACTIVITY
MATH
MISC.
100
Energy source for DC current circuits.
What is a battery
100
An iron nail wrapped with copper attached to a battery.
What is an electromagnet?
100
The reason radioactivity occurs.
What is instability in the nucleus?
100
Current is directly proportional to _________ and inversely proportional to __________. (Must have answer in correct order).
What is voltage (V); resistance (R)
100
In this type of circuit the addition of a light bulb results in the dimming of all bulbs.
What is a series circuit?
200
A circuit is made up of a load, switch, conductor and _______
What is an energy source (ex. battery)?
200
Area around a magnet where things are repelled or attracted.
What is a magnetic field?
200
Explain how chemical and nuclear reactions are the same and how they are different (in that order).
What is conservation of mass and charge; takes place between electrons (no elemental change) vs. in the nucleus (elemental change)
200
Calculate the voltage difference when R = 25 ohms and I = 0.5 A. (Include units)
What is 12.5v?
200
The build up or flow of electrons.
What is electricity?
300
A negatively charged balloon is held near, but not touching, a neutrally charged wall. This is a demonstration of what type of charging and what will happen?
What is charging through induction? The negative electrons will push the negative electrons in the wall away and create a local positively charged area.
300
Identify two changes that can be made to an electromagnet to increase magnet strength (there are more than 2 acceptable answers).
What is 1. Increase the number of coils 2. Increase the current 3. Increase the metal core
300
Why are gamma rays difficult to stop?
What is they are high energy light with no mass?
300
A calculator uses a 9V battery and draws 0.1A. How much power is the calculator using? (Include units)
What is .9w?
300
The are where magnetic force is strongest and why.
What is at the poles because this is where the lines are closest together.
400
In a parallel circuit, each device is plugged into a power source. Each device receives the same _________, but the amount of current is dependent on the _________ of that particular device (write in the proper order).
What is voltage, resistance?
400
2 ways to increase the electric current using electromagnetic induction.
What is 1) increase electric current when magnet is moved faster and 2) increase electric current with more loops of wire
400
Explain the process of fission.
What is the process by which a large nucleus splits into 2 small nuclei, releases energy, and becomes more stable?
400
A current of 0.5 amps flows in a 60 watts bulb when the voltage difference is 120 volts. What is the resistance? (Include unit)
What is 240 ohms?
400
A blender is an example of an appliance that uses a _________ to turn electrical energy into mechanical energy.
What is an electric motor?
500
Bob makes a series circuit. Susie builds the same circuit, but uses a larger diameter copper wire. Which student has a circuit with a higher current flowing through it and why?
What is Susie's circuit because thicker wire means less resistance?
500
Explain how electric motor and an electric generator are flip sides to the same coin in terms of energy transformations (keep it in that order).
What is uses electromagnetic induction to change mechanical energy into electrical energy vs. a device that converts electrical energy into mechanical energy?
500
What forms after the beta decay of Phosphorus-33?
What is Sulphur-33 (with an atomic number of 16)?
500
The half-life of carbon-14 is approximately 6,000 years. What percentage of carbon-14 will a sample have after 3 half-lives?
What is 1/8?
500
Terminology for a resistor that performs a useful task.
What is a load?