CH. 2
Base unit = coulombalso the base unit for current and voltage
Symbol = QAbbreviation = C
Electric current – movement of charged particles in a specific directionElectrons, pos ions, neg ionsSpeed of light (186,000 miles per sec.)
Symbol – I (intensity of the electricity)Unit of current – ampere (amp)
Coulombs per second1A = 1 coulomb/sec
• Direct current– Dc– Current travels in same/one direction– Flashlight cells, and batteries
• Alternating current– Ac– Current periodicallly reverses the direction in
which it is moving– In your house (every 1/120 of a sec)– In tv receiver (every 1/67,000,000 of a sec)
Electric pressure that causes current flowElectromotive force (emf)
Symbol = VTypes of energy
Kinetic energyEnergy in motion, energy doing work, or energy being
converted into another formPotential energy
Energy that can be stored for a long period of time in its present form
Capable of doing work
Opposition a material offers to currentSymbol – RUnit of resistance – omega symbol
Measured in ohmsConverts electric energy into heat energy
when current is forced through a material
Top Related