Electricity Basics
What is the unit of electric charge?
What is the Coulomb?
What are the two poles of a magnet?
What are the north pole and south pole?
What is the purpose of a battery in a circuit?
What is to provide the energy needed for the flow of electrons?
What happens to the strength of an electromagnet if you increase the number of coils of wire?
What is the strength of the electromagnet increases?
What type of force occurs between two objects with opposite charges?
What is attraction?
What type of charge do electrons have?
What is a negative charge?
What happens when you bring a north pole of one magnet and the south pole of another magnet together?
What is they attract each other?
Two objects are placed at the same distance from a test charge. Object A causes the test charge to move twice as far as Object B. What can you conclude about the charges of Objects A and B?
What is Object A likely has a charge twice as large as Object B
What is the term for a magnet created by a current flowing through a coil of wire?
What is an electromagnet?
True or False: Only objects that are touching each other can exert an electric force.
What is false?
What happens when two objects with like charges (both positive or both negative) are brought together?
What is they repel each other?
What happens to the force between two magnets when they are brought closer together?
What is the force increases?
What happens if you disconnect one lightbulb in a series circuit?
What is all the lights in the circuit go out?
How can you increase the strength of an electromagnet?
What is increase the current or use more coils of wire?
What is the effect of distance on the strength of a magnetic force between two magnets?
What is the force decreases as the magnets are moved farther apart?
What is the name of the flow of electric charge?
What is current?
What happens when you break a magnet in half?
What is each piece will form a new north and south pole?
What is the difference between a series circuit and a parallel circuit?
What is a series circuit has one path for current, while a parallel circuit has multiple paths?
In a solenoid, how does the direction of the current affect the magnetic field?
What is the direction of the magnetic field reverses when the current reverses?
How does the amount of charge on two objects affect the strength of the electric force between them?
What is the greater the charge, the stronger the electric force?
If the voltage in a circuit is 10 volts and the resistance is 5 ohms, what is the current?
Answer: What is 2 amps? (Use Ohm’s Law: V = IR, so I = V/R)
If the distance between two magnets doubles, what happens to the force between them?
What is the force is reduced by a factor of four? (Inverse square law)
What happens to the total resistance in a parallel circuit as more resistors are added?
What is the total resistance decreases
How does the presence of an iron core affect an electromagnet's strength?
What is the iron core increases the strength of the electromagnet by concentrating the magnetic field?
What is the relationship between the force of gravity and the mass of two objects?
What is the greater the mass of the objects, the stronger the gravitational force between them?