Doubling the distance between charges decreases the electric force by ¼ this relationship is ____________ proportional.
inversely
100
If an atom gains an electron it becomes _________ charged
If an atom loses an electron it becomes ________ charged
negatively; positively
100
Metals have a “lattice” atomic structure which allows electrons to _____ ________.
move freely
100
_______ __________ use symbols to indicate parts of the circuit
circuit diagrams
100
Along with gravity and the strong & weak nuclear force, __________________ makes up one of the four known forces in the universe. (Electricity & magnetism are two parts of this force)
electromagnetism
200
Doubling a charge on one particle doubles the electric force this type of relationship is _______ proportional.
directly
200
Like charges (+)(+) or (-)(-) ________
Opposite charges (+)(-) or (-)(+) ________
repel; attract
200
The SI unit of resistance is the _______.
Ohm (Ω)
200
An _______ switch cuts the circuit loop and the electric flow stops
open
200
Flowing electric charges create ________ ______
magnetic fields
300
Positive charges have electric fields that point ________. Negative electric charges have electric fields that point _________.
outward; inward
300
Electric field strength depends on the amount of ________ that an object or particle has - and the _________ from the charge
charge; distance
300
Potential difference is measured in joules per coulomb or ________.
volts (v)
300
A _______ switch completes the circuit and charges can flow. Electrons in this circuit flow from the direction of the positive terminal.
closed
300
_____ _________ discovered through experiments that electricity and magnetism were related (showed that electric current moving through a wire deflected a compass needle)
Hans Oersted
400
Electric current is measured in the SI unit of __________.
amperes or amps
400
Net charges can move between objects in three ways: __________,__________, & _____________.
friction, contact, and induction
400
Electron flow can move through a conducting wire in a complete loop or ______.
circuit
400
Electric power is calculated by:
current x voltage
400
Electromagnets are very strong magnets that can change ________ & ________ with a change in current
strength; direction
500
________ __________ discovered that voltage changed in a circuit due to resistance
George Ohm
500
_______ __________ happens when a pathway is created by an imbalance of electric charges
static discharge
500
_______ ________ is a mathematical relationship between voltage, current and resistance
Ohm's Law
500
The formula for electrical energy (E) is:
power (P) x time (t)
500
Increasing the current and the amount of wire loops in the solenoid will _________ the electromagnet’s strength