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PS: Ch 15 T
Question | Answer |
---|---|
SI unit of current flow | ampere |
lamp that produces light by heating a filament so it glows | incandescent lamp |
Converts pulses of electricity into sound waves | loudspeaker |
"force" which electricity flows | voltage |
If current increases in a circuit, then __?__ increases | power |
list 3 parts of an AC motor | Armature, Field Magnet, Slip Ring |
the total voltage in a series circuit is | sum of the individual voltages |
What unit is used by electric companies in which they charge for their electricity | kw/hr |
device that uses electromagnetic induction to produce an electric current | generator |
an electrical switch operated by an electromagnet | relay |
list the four factors that affect resistance | type of material, diameter of object, length of object and temperature |
by using electromagnetic induction, __?__ can increase or decrease voltage of alternating currents | transformer |
SI unit to measure the 'force' an electric current flows | volt |
circuit that has gaps where an electron cannot cross | open circuit |
ability of magnetism to convert motion into current | electromagnetic induction |
Formula for Power | P=VI |
Formula for Voltage | V=IR |
give 3 things that affect the strength of an electromagnetically induced current | speed of magnet, number of turns of wire, strength of magnet |
generator that uses a fluid as a moving conductor | magnetohydrodynamic generator |
a wire moving in a magnetic field generates no current if it travels __?__ to the lines of flux | parallel |
what law shows the relationship between voltage, current, and resistance | ohm's law |
semiconductor that emits light when a direct electric current is applied | light-emitting diode (LED) |
device used to open and close a circuit | switch |
arranging electrochemical cells in parallel causes the voltage to __?__ | remain the same |
arranging the electrochemical cells in series causes the voltage to __?__ | increase |
arranging electrochemical cells in parallel causes the current to __?__ | increase |
Current and voltage are __?__ proportional | directly |
Electrical device used to add resistance to a circuit | resistor |
"V" stands for | voltage or volts |
"I" stands for | current or amps |
"R" stands for | resistance or omega |
"P" stands for | power or watts |