PHYSICS - Current / Power / Resistance - FILL IN

________________ ____________ is when there is a difference in the voltage between two ends of a conductor, charge will flow until both ends reach a common potential
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________________ ____________ is when there is a difference in the voltage between two ends of a conductor, charge will flow until both ends reach a common potential
potential difference
When there is no potential difference the flow through the conductor is _________
zero
A suitable ___________ must be supplied to maintain difference (whether we are talking about flow of water or flow of charge)
pump
Electric ___________ is the flow of electric charge
current
______________ are in fixed position in the nucleus of an atom and cannot move about
protons
In fluids such as electrolytes (car battery) positive and negative _______ as well as electrons may compose the flow of electric charge
ions
The SI unit of electric current is _________
amperes
1A = flow of 1 _________ of charge per second
coulomb
1 coulomb = _________ x 10¹⁸ electrons
6.25
A sustained current requires a suitable electric pump to provide _________ ________
potential difference
Dry cells, wet cells and generators all provide _________ that allows charges to moveenergyThe potential energy per coulomb of charge available to electrons moving between terminals is called ________voltage_________ does not flow - it creates pressure that causes flowvoltagethick wires = ______ resistancelessshort wires = ______ resistancelessthin wires = ______ resistancemorelong wires = ______ resistancemoreincreased temperature = ______ resistancemoreElectrical resistance is measured in units called _______ohmsOhms law equationI=V/ROhms law equation in unitsAmpere = volt/ohmIt is a ______ not voltage that caused effect of electric shockcurrent___________ is the flow of charge in one directiondirect currentIn ______________ electrons move first in one direction and then in the other directionalternating currentIn North America nearly all AC circuits alternate back and forth at a frequency of__________60 hrzVoltage is normally______ volts120Europe adopted____volts220The current in your home is ________ACThe current in a battery is ________DC_________ is a tiny electronic device that acts as a one-way valve to allow electrical flow in only one directiondiodeA 60W lightbulb is connected to a 12V car battery. When another 60W bulb is connected in parallel with the first bulb, the battery's output energy __________doubles