Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/25

Click to flip

25 Cards in this Set

  • Front
  • Back
Current
the rate at which current passes a given point
Ampere
unit for current
I
symbol for current
Direct current
current where charges flow in the same direction
Alternating current
current where the charges continually switch directions
Voltage
the difference in energy per unit charge as a charge moves between two points in a current
volts
unit for voltage
V
symbol for voltage
Resistance
the opposition to flow of electric charge
Ohms
unit for resistance
R
symbol for resistance
Which wire width has more resistance?
thin
Which length of wire has more resistance?
longer
Does a higher temperature, increase or decrease wire resistance?
increase
which direction do electrons flow?
From higher potential to lower potential
Name the device to measure current, voltage and resistance.
ammeter, voltmeter, ohmmeter
Circuit
a complete, closed path through which electric charges flow
Name the 4 parts of a circuit.
energy source, connecting wires, load, switch
Load
a devise that uses electrical energy to do work
switch
open and closes a circuit
Series circuit
circuit in which all parts are connected in a single loop
Parallel circuit
a circuit in which different loads are located on separate branches
Short circuit
charges bypass the loads and the current increases
Fuse
Safety devise that coantins a thin metal strip that melts when the current is too hign to shut it down
Circuit Breaker
Saftey devise that contains a thin metal strip that heats and bends away from wires shutting down current when it is too high