How Shocking
Current Events
Circuits
Solving
100
Who found the relationship between electric charge on particles and the force between them?
Charles-Augustin de Coulomb
100
What is the unit of resistance?
Ohm (Ω)
100
Between electrical insulators and conductors, which hold on to their electrons tightly?
Electrical insulators
100
What is the resistance of a 34 V system with 15.4 A of current running the wire?
2.21 Ω
200
What is the unit of electric charge?
Coulomb
200
What is a short circuit?
An unintended path for the circuit to take
200
What circuit allows current to flow?
Closed circuit
200
A simple circuit has a lamp that draws 24.3 A and uses 10 V. How much power is needed to run the lamp?
243 W
300
What do we use to measure the strength of an electric field
A small positive charge
300
What is voltage?
The work done to move a coulomb of charge through a circuit
300
What is a ground-fault interrupter?
An outlet with a circuit breaker built into it
300
A simple circuit has a fan that draws 43 A and uses 20 V. How many kilowatt-hours are used to run the fan for two minutes?
.0287 kW*h
400
Define conduction and induction.
Conduction - when a charged object comes in contact with an uncharged object
Induction - when two objects are brought close to each other, but do not touch
400
Define direct current and alternating current.
Direct current - flows in one direction through the power source, through the components of the circuit, and then back to the power source
Alternating current - the changing of the direction of charge carriers
400
What is constant throughout a parallel circuit? Through a series circuit?
Voltage is the same throughout parallel circuits
Current is the same throughout series circuits
400
It costs the school $.19/kW to run the lights. The system draws 42 A of current and runs on 64 V. How much would it cost to run the lights all day?
$12.26
500
Draw two images. One between like charges and one between unlike charges.
Unlike vs. Like Ignore this
500
What are the four factors that affect resistivity?
Material - metals have low resistance
Diameter of the wire - as the diameter increases, resistance decreases
Diameter of the wire - as the diameter increases, resistance decreases
Length of the wire - as length increases, resistance increases
Temperature - as temp increases, resistance increases
500
Draw a circuit with a 24.3 V battery, closed switch, two 13 Ω resistor (in parallel), and a lamp.
500
Find the following: the total resistance, the total current, and the voltage drop at each resistor.
Rtotal = 42 Ω
Itotal = 1.29 A
V1 = 29.67 V
V2 = 24.51