Search
Browse
Create
Log in
Sign up
Log in
Sign up
Upgrade to remove ads
Only $2.99/month
phyics 4
STUDY
Flashcards
Learn
Write
Spell
Test
PLAY
Match
Gravity
Terms in this set (46)
a device that produces electricity by transforming chemical energy into electrical energy is called a
battery
the total amount of charge that passes through a wire's full cross section at any point per unit of time is referred to as
current
the direction of convention current is taken to be the direction that
positive charges would flow
the resistance of a wire is defined as
(voltage)/(current)
the resistance of a wire is
proportional to its length and inversely proportional to its cross-sectional area
what current is flowing if 0.67 C of charge pass a point in 0.30s
2.2A
how much does it cost to operate a 25W soldering iron for 8.0 hours, if energy costs $0.08/kWh
$0.016
a light bulb operating at 110V draws 1.40 A of current. what is its resistance?
78.6
what is the resistance of 1.0m of no. 18 copper wire (diameter 0.40 in)?(The resistivivity of copper is 1.68 x 10-8)
0.00021
a 110V hair dryer is rated at 1200W. What current will it draw?
11A
a charged particle moves and experiences no magnetic force. From this we can conclude that
either no magnetic field exists or the particle is moving parallel to the field
at a particular instant, a proton moves eastward at speed V in a uniform magnetic field that is directed straight downward. the magnetic force that acts on it is
directed to the north
a vertical wire carries a current straight down. to the east of this wire, the magnetic field points
south
a current carrying loop of wire lies flat on a table top. when viewed from above, the current moves around the loop in a counterclockwise sense. what is the direction of the magnetic field caused by this current, outside the loop? the magnetic field
points straight down
the force on a current carrying wire in a magnetic field is the strongest when
the current is perpendicular to the field lines
a battery transforms chemical energy into
electrical energy
electric current is
the rate of flow of a charge through a conductor
unit of electric current
ampere, A
current flows from positive to ____, while electrons flow from negative to _____
negative, positive
current is proportional to
potential difference
formula for voltage
IR = current x resistance
units of resistance is
Ohm or 1 V/A
Ohm's Law
resistance is independent of voltage
current is not a vector but has direction T/F
True
Resistivity ____ with increased temp, and ____ with decreased temp.
increases, decreases
Power =
current x voltage (watts)
a series connection has a sige path
R1+R2+R3
a parallel connection splits the current and the voltage across each resistor is the ___
same
parallel connection =
1/R1 + 1/R2 + 1/R3
Kirchoff's rules:
junction rule, loop rule
junction rule:
the sum of currents entering equals the sum of currents leaving
loop rule
the sum of the changes in potential around a closed loop is zero
if an isolator charged capacitor is connected across a resistor it ___
discharges
an ammeter measures
current
a voltmeter measures
voltage
Ohmmeter measures
resistance
voltmeter resistance should be
very large
the force on the wire depends on
current, length of wire, magnetic field, and orientation
the force on a moving charge is related to
the force on a current
the field is inversely proportional to the
distance from the wire
parallel currents attract, and antiparallel currents
repel
a changing magnetic field induces an ___
emf
electromagnetic wave =
wavelength x frequency
law of reflection:
the angle of reflection equals the angle of incidence N = c/v
snell's law
angle of reflection = n1sintheta1 = n2sintheta2
total internal reflection
if the angle of incidence is larger than this (90), no transmission occurs
THIS SET IS OFTEN IN FOLDERS WITH...
Physics 2 Chapter 20
25 terms
Physics II Chapter 23 Magnetic Flux
15 terms
Chapter 22 Magnetism
28 terms
Physics 2 Test 5
93 terms
YOU MIGHT ALSO LIKE...
Applying the Concepts Ch. 6
51 terms
Applying the Concepts Ch. 6 (final)
51 terms
PHY 1104 | Exam 3
84 terms
Chapter 6 - Electricity and Magnetism
42 terms
OTHER SETS BY THIS CREATOR
Tom Thutt NC Law Review Day 1
268 terms
TOP 300 NAPLEX 2019
303 terms
NAPLEX Infectious Disease
118 terms
NAPLEX formulas
102 terms
OTHER QUIZLET SETS
LON-CAPA Unit 1
13 terms
Egee Quizzes
35 terms
Physics Test 1
48 terms
Unit 1 - Radiation concepts and electricity
74 terms