True or false. "Soft" iron is used for the cores of electromagnets because it is easy to magnetize.
What is "true?"
100
True or false. Step-up transformers decrease the voltage before it leaves a power plant.
What is "false?"
100
The force responsible for the repulsion between two positively-charged particles
What is "electric?"
100
The unit of electric power
What is "watt?"
100
As an astronaut travels far away from Earth, her weight...
What is "decreases?"
200
True of false. Moving a magnet inside a coil of wire will induce a voltage in a coil. Holding the magnet stationary will increase the voltage in the coil even more.
What is "false?"
200
Electric current in power lines must pass through this to ensure that it is safe for your home
What is a "step-down transformer?"
200
The force that keeps an object moving in a circle
What is "centripetal?"
200
Ohm's law
What is "V= I X R" ?
200
The further away from Earth you go, gravity...
What is "decreases?"
300
The process of generating an electric current by moving an electrical conductor relative to a magnetic field
What is "electromagnetic induction?"
300
Heat from burning fossil fuel generates electrical energy by creating steam that spins this
What is a "turbine?"
300
The weakest universal force
What is "gratitational?"
300
Type of current in your school
What is "alternating current?"
300
The number of paths through which charge can flow in a parallel circuit
What is "two or more?"
400
A device that changes mechanical energy to electrical energy by rotating a coil of wire through a magnetic field
What is a "generator?"
400
This law states that a voltage is induced in a conductor by a changing magnetic field
What is "Faraday's Law?"
400
The universal force that acts only on the protons and neutrons in a nucleus
What is "strong nuclear?"
400
Type of current produced by a battery
What is "direct current?"
400
Step-up transformers increase or decrease voltage for efficient long-distance transmission?
What is "increases?"
500
True or False. The output voltage and current of a transformer are determined by the number of turns in the primary and secondary coils.
What is "true?"
500
True or False. The strength of a solenoid's magnetic field is affected by the number of turns in the solenoid's conductor and the amount of current.
What is "true?"
500
An atom that gains electrons
What is "negatively charged ion?"
500
The force a magnet exerts on another magnet, on iron or a similar metal, or on moving charges
What is "magnetic force?"
500
The more turns in a solenoid's conductor and the greater the current, the stronger or weaker the solenoid's magnetic field will be?