Power
Resistance
Current
Potential Difference
Resistivity
100
What is the definition of Electrical Power?
Electrical Energy per unit time (W)
100
What is the definition of Resistance?
Impedes the flow of charges and increases with temperature (Ohms)
100
What is Current?
Flow of charge over time (A)
100
What is Potential Difference?
Change in electric potential energy between two positions (V)
100
What are the units for Resistivity?
Ohm meters
200
A 110-volt toaster oven draws a current of 6 amps on its highest setting as it converted electrical energy into thermal energy. What is the toaster's maximum power rating?
660 W
200
The current in a wire is 24 amperes when connected to a 1.5 volt battery. Find the resistance of the wire.
.0625 Ohms
200
A charge of 30 Coulombs passes through a 24-ohm resistor in 6.0 seconds. What is the current through the resistor?
5 A
200
A current of 2.0 amperes flows through a 10 ohm resistance.What voltage must be supplied to this resistance?
20 V
200
Which metal has the lowest resistivity?
Silver
300
In a hairdryer, a charge of 350 C moves through a potential defference of 20-V for 4 minutes. How much power is transformed?
29.2 W
300
Calculate the resistance of a 1000 Watt microwave designed for 27 Volts
.729 Ohms
300
During a thunderstorm a lightning strike transfers 15.0 coulombs of charge in 10.0 milliseconds.What was the electrical current produced in the strike?
1.5x10^3 A
300
A potential difference of 10.0 volts exists between two points, A and B, within an electric field. What is the magnitude of charge that requires 2.0 × 10–2 joule of work to move it from A to B?
300
Determine the resistance of a 1.0 meter long copper wire with a cross-sectional area of 0.01 meter^2.
1.72x10^-6 Ohm
400
5.0 * 10^22 electrons flow through a wire with a resistance of 16 ohms in 6 hours. How much power was used?
2.2 W
400
A wire allows 2.5 x 10^15 electrons to flow through it every 8.0 seconds. What is the current passing through the wire in amperes?
5x10^-5 A
400
A 3.50-meter length of wire with a cross-sectional
area of 3.14×10–6 m2 at 20° Celsius has a resistance of 0.0625 
. Determine the resistivity of the wire and the material it is made out of.
500
How much does it cost per week to operate a stereo for 3 hours per day if it draws 16 A on a 150-V line and the charge is $0.09 per kWh?
$4.54 per week