CHARGE
TRUE or FALSE??
Electrical forces can act at a distance.
What is TRUE?
The FORCE or PUSH that causes ELECTRIC CHARGES to MOVE.
What is VOLTAGE DIFFERENCE?
A device that measures VOLTAGE DIFFERENCE in a circuit.
What is a VOLTMETER?
2 AREAS of physical science closely related to the development of electric motors & generators
A) electricity & sound
B) light & magnetism
C) electricity & magnetism
What is C) electricity & magnetism?
A device that uses an electromagnet to convert MECHANICAL ENERGY to ELECTRICAL ENERGY.
What is a GENERATOR?
The METHOD by which a NEUTRAL OBJECT obtains an ELECTRICAL CHARGE.
What is INDUCTION?
ELECTRIC CHARGES always FLOW from ____ areas to ____ areas.
What is NEGATIVE to POSITIVE?
Ways to prevent circuits within a house from overheating
What are 1) FUSE & 2) CIRCUIT BREAKER?
A material that gives off an external magnetic field - making it possible to apply a force over a distance.
What is a MAGNET?
Circuit with GREATEST VOLTAGE
A) current of 20 amps & resistance of 16 ohms
B) current of 10 amps & resistance of 10 ohms
C) current of 25 amps & resistance of 16 ohms
D) current of 20 amps & resistance of 10 ohms
What is C) current of 25 amps & resistance of 16 ohms? 25 amps x 16 ohms = 400 V
A) 20 x 16 = 320V B) 10 x 10 = 100V D) 20 x 10 = 200V
CONDUCTOR vs. INSULATOR
What is ...
CONDUCTOR - material electrons FLOW THRU EASILY
INSULATOR - material electrons DO NOT FLOW thru easily?
RESISTANCE of a wire will INCREASE by ...
A) using a shorter wire
B) increasing the temperature of the wire
C) using silver instead of copper
What is ...
B) increasing the temperature of the wire?
SYMBOL on a CIRCUIT that represents a device that turns a circuit on or off
What is a SWITCH?
A temporary magnet made by placing a piece of iron in a current-carrying coil of wire.
What is an ELECTROMAGNET?
Type of circuit that causes an entire string of lights to go out if one bulb burns out.
What is a SERIES CIRCUIT?
A charge imbalance that results in the build up or accumulation of excess electric charge (electrons) on an object.
What is STATIC ELECTRICITY?
To INCREASE the CURRENT, you should ____ voltage & ____ resistance.
What is INCREASE VOLTAGE & DECREASE RESISTANCE?
FUSE vs. CIRCUIT BREAKER
What are ...
FUSE - piece of metal that MELTS to open circuit when overheated
CIRCUIT BREAKER - piece of metal that BENDS to open circuit when overheated?
WAYS to INCREASE the STRENGTH of an ELECTROMAGNET.
What are ...
1) INCREASE LOOPS
2) INCREASE CURRENT?
GOOD INSULATORS
What are wood, plastic, rubber, styrofoam?
SUBATOMIC PARTICLES - Location within the atom & their charge.
What are...
PROTONS (nucleus of atom - positive);
NEUTRONS (nucleus of atom - neutral);
ELECTRONS (outside of nucleus, on shell - negative)?
4 FACTORS that affect RESISTANCE
What are 1) MATERIAL, 2) SIZE of WIRE, 3) LENGTH of WIRE, 4) TEMPERATURE of WIRE?
SERIES vs. PARALLEL CIRCUITS - differences & example of each
What are ...
SERIES - 1 path, all must work, EX: Christmas lights
PARALLEL - 1> path, use 1 part at a time, EX: house
FERROMAGNETISM - explain
What is a phenomenon where objects placed in a strong magnetic field become magnetized due to the poles within their atoms aligning (all electrons - in same direction)?
Series circuit with 2 batteries, 2 resistors, 1 light, & a switch to turn the whole circuit off.
What is ...?