Current #1
What is the symbol for current?
I
What symbol represents electrical charge?
q
What is the symbol used to represent volt drops in an electric circuit?
V
The potential difference between the two terminals on a battery is 9 volts. How much work (energy) is required to transfer 10 coulombs of charge across the terminals?
90 Joules
What is the formula for resistance in a wire?
R = PL/A
What is the symbol for the unit of measurement for current?
A
What is the equation for charge, current and time?
I = q/t
What is the job of the voltage in a circuit?
To push/to do work
Ten joules of work (energy) are required to transfer 2 coulombs of charge from X to Y. What is the difference in potential between these two points?
5V
What is the unit of measure for resistance?
ohms
When we say current is flowing, which sub-atomic particle are we referring to?
Electrons
Ammeter
Volltage is also know as
Potential difference
It requires 600 joules of energy to transfer a quantity of charge between points C and D of a circuit, which have a potential difference of 30 volts. How much charge is transferred?
20 C
What does the greek symbol "p" aka row represents in the resistance formula?
Resistivity
The flow of charge per seconds is know as
Current
Charge
1V is equal to
1J / 1C
V = ?
W = 1.25 kJ
q = 1500 C
.83 V
Increase in cross section area of the wire caused resistance to
Decrease
How many electrons make up 1 Coulomb?
6.24 x 10^18
How many seconds does it take for 21 coulombs of charge to go past a point if the current is 4 Amps?
21/4 = 5.25 seconds
The formula for voltage is equal to
Work / Charge
If 340 J of work is done to move 1.5 X 10 -3 C of charge from a positive plate to a negative one, what is the potential difference between the plates?
2.26 x 105 V
Name 3 good conductors of electricity
Copper, silver, gold, aluminum