What is Magnetism?
___________ attract iron and materials that contain iron.
What are magnets?
The area of magnetic force around a magnet is known as its ____ ____.
What is magnetic force?
The relationship between electricity and magnetism is called _______.
What is electromagnetism?
When a wire with a current is placed in a magnetic field, electrical energy is transformed into ____ ____.
What is mechanical energy?
Generating electric current from the motion of a conductor through a magnetic field is called ______.
What is electromagnetic induction?
One end of a magnet will always point ______ when allowed to swing freely.
What is North?
_____ _____ ____ spread out from one pole, curve around the magnet, and return to the other pole.
What are magnetic field lines?
The magnetic field produced by a current has a _____ and a _______.
What is a strength and a direction?
An ___ ___ turns the pointer of a galvanometer.
What is an electric current?
A battery produces _______ _______ when it is placed in a circuit and charges flow in one direction.
What is direct current?
Magnetic poles that are unlike will _____ each other, and magnetic poles that are alike will ______ each other.
What is 1) attract and 2) repel ?
Just like bar magnets, _____ has a magnetic field around it and two magnetic poles.
What is Earth?
Both solenoids and electromagnets use ___ ___ and ___ ___ to produce strong magnetic fields.
What is electric current and coiled wires?
A _________ is a device used to measure small currents.
A _______ uses motion in a magnetic field to produce current.
A magnet always has both a ___ ___ and a ___ ___.
What is a North Pole and a South Pole?
Different magnetic pole arrangements will produce different ____ ____.
What are magnetic fields?
A solenoid with a ____ ____ is called an electromagnet.
What is ferromagnetic core?
An ____ ____ is a device that uses an electric current to turn an axle.
What is an electric motor?
A ______ is a device that increases or decreases voltage.
What is a transformer?
The ____ or _____ between magnetic poles is magnetic force.
What is attraction or repulsion?
The angle between geographic North and the North to which a compass needle points is called ___ ___.
You can increase the strength of an electromagnet in four ways.
What are
1. Increase the current in the solenoid
2. Add more loops of wire to the solenoid
3. Wind the coils of the solenoid closer together.
4. Use a material that is more magnetic than iron for the core.
An electric motor transforms ____ ____ into ___ ___.
What is 1) electrical energy and 2) mechanical energy?
In step-up transformers the primary coil has ______ loops, while in step-down transformers the primary coil has ______ loops.
What is 1) fewer and 2) more?